diff --git a/lang/cem/cemcom.ansi/BigPars b/lang/cem/cemcom.ansi/BigPars
index 97965fd16..6f4b0971d 100644
--- a/lang/cem/cemcom.ansi/BigPars
+++ b/lang/cem/cemcom.ansi/BigPars
@@ -111,10 +111,6 @@
 #define INP_READ_IN_ONE	1	/* read input file in one	*/
 
 
-!File: nopp.h
-#define NOPP		1	/* if NOT defined, use built-int preprocessor */
-
-
 !File: nobitfield.h
 /*#define NOBITFIELD	1	/* if NOT defined, implement bitfields	*/
 
diff --git a/lang/cem/cemcom.ansi/LLlex.c b/lang/cem/cemcom.ansi/LLlex.c
index 1c69f352d..f0f5d5c24 100644
--- a/lang/cem/cemcom.ansi/LLlex.c
+++ b/lang/cem/cemcom.ansi/LLlex.c
@@ -27,13 +27,6 @@ int tk_nmb_at_last_syn_err = -5 /*ERR_SHADOW*/;
 int idfsize = IDFSIZE;
 char sp_occurred[SP_TOTAL + 1];
 
-#ifndef NOPP
-int ReplaceMacros = 1; /* replacing macros			*/
-int AccDefined = 0; /* accept "defined(...)"		*/
-int UnknownIdIsZero = 0; /* interpret unknown id as integer 0	*/
-int Unstacked = 0; /* an unstack is done 			*/
-extern int InputLevel;
-#endif
 int AccFileSpecifier = 0; /* return filespecifier <...>		*/
 int EoiForNewline = 0; /* return EOI upon encountering newline	*/
 int File_Inserted = 0; /* a file has just been inserted	*/
@@ -48,33 +41,6 @@ extern arith full_mask[];
 extern int lint_skip_comment;
 #endif
 
-#ifndef NOPP
-static struct token LexStack[MAX_LL_DEPTH];
-static LexSP = 0;
-
-void skipcomment();
-void skiplinecomment();
-
-/*	In PushLex() the actions are taken in order to initialise or
-    re-initialise the lexical scanner.
-    E.g. at the invocation of a sub-parser that uses LLlex(), the
-    state of the current parser should be saved.
-*/
-PushLex()
-{
-	assert(LexSP < MAX_LL_DEPTH);
-	assert(ASIDE == 0); /* ASIDE = 0;	*/
-	GetToken(&ahead);
-	LexStack[LexSP++] = dot;
-}
-
-PopLex()
-{
-	assert(LexSP > 0);
-	dot = LexStack[--LexSP];
-}
-#endif /* NOPP */
-
 int LLlex()
 {
 	/*	LLlex() plays the role of Lexical Analyzer for the C parser.
@@ -152,9 +118,6 @@ go_on: /* rescan, the following character has been read	*/
 				return ptok->tk_symb = EOI;
 
 			while ((ch = GetChar()), (ch == '#'
-#ifndef NOPP
-			                          || ch == '/'
-#endif
 			                          || class(ch) == STSKIP))
 			{
 				/* blanks are allowed before hashes */
@@ -162,26 +125,6 @@ go_on: /* rescan, the following character has been read	*/
 				{
 					/* a control line follows */
 					domacro();
-#ifndef NOPP
-					if (File_Inserted)
-					{
-						File_Inserted = 0;
-						goto firstline;
-					}
-				}
-				else if ((ch == '/') && !InputLevel)
-				{
-					int nch = GetChar();
-					if (nch == '*')
-						skipcomment();
-					else if (nch == '/')
-						skiplinecomment();
-					else
-					{
-						UnGetChar();
-						break;
-					}
-#endif /* NOPP */
 				}
 			}
 			/*	We have to loop here, because in
@@ -192,9 +135,6 @@ go_on: /* rescan, the following character has been read	*/
 		case STSKIP: /* just skip the skip characters	*/
 			goto again;
 		case STGARB: /* garbage character			*/
-#ifndef NOPP
-		garbage:
-#endif
 			if (040 < ch && ch < 0177)
 			{
 				return ptok->tk_symb = ch;
@@ -285,21 +225,6 @@ go_on: /* rescan, the following character has been read	*/
 						return ptok->tk_symb = XORAB;
 					break;
 				case '/':
-#ifndef NOPP
-					if (!InputLevel)
-					{
-						if (nch == '*')
-						{
-							skipcomment();
-							goto again;
-						}
-						else if (nch == '/')
-						{
-							skiplinecomment();
-							goto again;
-						}
-					}
-#endif
 					if (nch == '=')
 						return ptok->tk_symb = DIVAB;
 					break;
@@ -339,17 +264,6 @@ go_on: /* rescan, the following character has been read	*/
 			register int pos = -1;
 			register struct idf* idef;
 			extern int idfsize; /* ??? */
-#ifndef NOPP
-			int NoExpandNext = 0;
-
-			if (Unstacked)
-				EnableMacros(); /* unstack macro's when allowed. */
-			if (ch == NOEXPM)
-			{
-				NoExpandNext = 1;
-				ch = GetChar();
-			}
-#endif
 			do
 			{ /* read the identifier	*/
 				if (++pos < idfsize)
@@ -366,19 +280,6 @@ go_on: /* rescan, the following character has been read	*/
 			sp_occurred[idef->id_special] = 1;
 			idef->id_file = ptok->tk_file;
 			idef->id_line = ptok->tk_line;
-#ifndef NOPP
-			if (idef->id_macro && ReplaceMacros && !NoExpandNext)
-			{
-				if (replace(idef))
-					goto again;
-			}
-			if (UnknownIdIsZero && idef->id_reserved != SIZEOF)
-			{
-				ptok->tk_ival = (arith)0;
-				ptok->tk_fund = INT;
-				return ptok->tk_symb = INTEGER;
-			}
-#endif /* NOPP */
 			ptok->tk_symb
 			    = (idef->id_reserved
 			           ? idef->id_reserved
@@ -472,101 +373,12 @@ go_on: /* rescan, the following character has been read	*/
 		}
 		case STEOI: /* end of text on source file	*/
 			return ptok->tk_symb = EOI;
-#ifndef NOPP
-		case STMSPEC:
-			if (!InputLevel)
-				goto garbage;
-			if (ch == TOKSEP)
-				goto again;
-/* fallthrough shouldn't happen */
-#endif
 		default: /* this cannot happen	*/
 			crash("bad class for char 0%o", ch);
 	}
 	/*NOTREACHED*/
 }
 
-#ifndef NOPP
-void skipcomment()
-{
-	/*	The last character read has been the '*' of '/_*'.  The
-	    characters, except NL and EOI, between '/_*' and the first
-	    occurring '*_/' are not interpreted.
-	    NL only affects the LineNumber.  EOI is not legal.
-
-	    Important note: it is not possible to stop skipping comment
-	    beyond the end-of-file of an included file.
-	    EOI is returned by LoadChar only on encountering EOF of the
-	    top-level file...
-	*/
-	register int c, oldc = '\0';
-
-	NoUnstack++;
-	c = GetChar();
-#ifdef LINT
-	if (!lint_skip_comment)
-	{
-		lint_start_comment();
-		lint_comment_char(c);
-	}
-#endif /* LINT */
-	do
-	{
-		while (c != '*')
-		{
-			if (class(c) == STNL)
-			{
-				++LineNumber;
-			}
-			else if (c == EOI)
-			{
-				NoUnstack--;
-#ifdef LINT
-				if (!lint_skip_comment)
-					lint_end_comment();
-#endif /* LINT */
-				return;
-			}
-			oldc = c;
-			c = GetChar();
-#ifdef LINT
-			if (!lint_skip_comment)
-				lint_comment_char(c);
-#endif /* LINT */
-		} /* last Character seen was '*' */
-		c = GetChar();
-		if (c != '/' && oldc == '/')
-			lexwarning("comment inside comment ?");
-		oldc = '*';
-#ifdef LINT
-		if (!lint_skip_comment)
-			lint_comment_char(c);
-#endif /* LINT */
-	} while (c != '/');
-#ifdef LINT
-	if (!lint_skip_comment)
-		lint_end_comment();
-#endif /* LINT */
-	NoUnstack--;
-}
-
-void skiplinecomment(void)
-{
-	/*	The last character read has been the '/' of '//'. We read
-	    and discard all characters up to but not including the next
-		NL. */
-	
-	for (;;) {
-		int c = GetChar();
-		if ((class(c) == STNL) || (c == EOI))
-		{
-			UnGetChar();
-			break;
-		}
-	}
-}
-#endif /* NOPP */
-
 arith char_constant(nm) char* nm;
 {
 	register arith val = 0;
@@ -710,78 +522,10 @@ int GetChar()
 	*/
 	register int ch;
 
-#ifndef NOPP
-again:
-#endif
 	LoadChar(ch);
-
-#ifndef NOPP
-	/* possible trigraph sequence */
-	if (ch == '?')
-		ch = trigraph();
-
-	/* \<newline> is removed from the input stream */
-	if (ch == '\\')
-	{
-		LoadChar(ch);
-		if (ch == '\n')
-		{
-			++LineNumber;
-			goto again;
-		}
-		PushBack();
-		ch = '\\';
-	}
-#endif
 	return (LexSave = ch);
 }
 
-#ifndef NOPP
-int trigraph()
-{
-	register int ch;
-
-	LoadChar(ch);
-	if (ch == '?')
-	{
-		LoadChar(ch);
-		switch (ch)
-		{ /* its a trigraph */
-			case '=':
-				ch = '#';
-				return (ch);
-			case '(':
-				ch = '[';
-				return (ch);
-			case '/':
-				ch = '\\';
-				return (ch);
-			case ')':
-				ch = ']';
-				return (ch);
-			case '\'':
-				ch = '^';
-				return (ch);
-			case '<':
-				ch = '{';
-				return (ch);
-			case '!':
-				ch = '|';
-				return (ch);
-			case '>':
-				ch = '}';
-				return (ch);
-			case '-':
-				ch = '~';
-				return (ch);
-		}
-		PushBack();
-	}
-	PushBack();
-	return ('?');
-}
-#endif
-
 /* strflt2tok only checks the syntax of the floating-point number and
  * selects the right type for the number.
  */
diff --git a/lang/cem/cemcom.ansi/LLlex.h b/lang/cem/cemcom.ansi/LLlex.h
index 90b003954..678149d9f 100644
--- a/lang/cem/cemcom.ansi/LLlex.h
+++ b/lang/cem/cemcom.ansi/LLlex.h
@@ -43,12 +43,6 @@ extern struct token dot, ahead, aside;
 extern int token_nmb;			/* number of the ahead token */
 extern int tk_nmb_at_last_syn_err;	/* token number at last syntax error */
 
-#ifndef NOPP
-extern int ReplaceMacros;	/* "LLlex.c"	*/
-extern int AccDefined;		/* "LLlex.c"	*/
-extern int Unstacked;		/* "LLlex.c"	*/
-extern int UnknownIdIsZero;	/* "LLlex.c"	*/
-#endif /* NOPP */
 extern int EoiForNewline;	/* "LLlex.c"	*/
 extern int AccFileSpecifier;	/* "LLlex.c"	*/
 extern int File_Inserted;	/* "LLlex.c"	*/
diff --git a/lang/cem/cemcom.ansi/SmallPars b/lang/cem/cemcom.ansi/SmallPars
index 3e3d00d98..4ef50e48e 100644
--- a/lang/cem/cemcom.ansi/SmallPars
+++ b/lang/cem/cemcom.ansi/SmallPars
@@ -111,10 +111,6 @@
 /*#define INP_READ_IN_ONE	1	/* read input file in one	*/
 
 
-!File: nopp.h
-#define NOPP		1	/* if NOT defined, use built-int preprocessor */
-
-
 !File: nobitfield.h
 /*#define NOBITFIELD	1	/* if NOT defined, implement bitfields	*/
 
diff --git a/lang/cem/cemcom.ansi/build.lua b/lang/cem/cemcom.ansi/build.lua
index 35ecbe3ef..8d9f0d6c0 100644
--- a/lang/cem/cemcom.ansi/build.lua
+++ b/lang/cem/cemcom.ansi/build.lua
@@ -111,7 +111,6 @@ cprogram {
 		"./field.c",
 		"./fltcstoper.c",
 		"./idf.c",
-		"./init.c",
 		"./input.c",
 		"./l_comment.c",
 		"./l_ev_ord.c",
@@ -124,7 +123,6 @@ cprogram {
 		"./options.c",
 		"./pragma.c",
 		"./proto.c",
-		"./replace.c",
 		"./skip.c",
 		"./stab.c",
 		"./stack.c",
diff --git a/lang/cem/cemcom.ansi/domacro.c b/lang/cem/cemcom.ansi/domacro.c
index ee6d25d00..cacdf79de 100644
--- a/lang/cem/cemcom.ansi/domacro.c
+++ b/lang/cem/cemcom.ansi/domacro.c
@@ -24,865 +24,6 @@ int IncludeLevel = 0;
 
 extern char options[];
 
-#ifndef NOPP
-#include <alloc.h>
-#include "class.h"
-#include "macro.h"
-
-extern char** inctable; /* list of include directories		*/
-extern char* getwdir();
-char ifstack[IFDEPTH]; /* if-stack: the content of an entry is	*/
-/* 1 if a corresponding ELSE has been	*/
-/* encountered.				*/
-
-int nestlevel = -1;
-
-void macro_def();
-void do_define();
-
-struct idf* GetIdentifier(skiponerr) int skiponerr; /* skip the rest of the line on error */
-{
-	/*	returns a pointer to the descriptor of the identifier that is
-	    read from the input stream. When the input doe not contain
-	    an identifier, the rest of the line is skipped when
-	    skiponerr is on, and a null-pointer is returned.
-	    The substitution of macros is disabled.
-	*/
-	int tmp = UnknownIdIsZero;
-	int tok;
-	struct token tk;
-
-	UnknownIdIsZero = ReplaceMacros = 0;
-	tok = GetToken(&tk);
-	ReplaceMacros = 1;
-	UnknownIdIsZero = tmp;
-	if (tok != IDENTIFIER)
-	{
-		if (skiponerr && tok != EOI)
-			SkipToNewLine();
-		return (struct idf*)0;
-	}
-	return tk.tk_idf;
-}
-
-/*	domacro() is the control line interpreter. The '#' has already
-    been read by the lexical analyzer by which domacro() is called.
-    The token appearing directly after the '#' is obtained by calling
-    the basic lexical analyzing function GetToken() and is interpreted
-    to perform the action belonging to that token.
-    An error message is produced when the token is not recognized,
-    i.e. it is not one of "define" .. "undef" , integer or newline.
-*/
-domacro()
-{
-	struct token tk; /* the token itself			*/
-	int toknum;
-
-	EoiForNewline = 1;
-	ReplaceMacros = 0;
-	toknum = GetToken(&tk);
-	ReplaceMacros = 1;
-	switch (toknum)
-	{ /* select control line action	*/
-		case IDENTIFIER: /* is it a macro keyword?	*/
-			switch (tk.tk_idf->id_resmac)
-			{
-				case K_DEFINE: /* "define"	*/
-					do_define();
-					break;
-				case K_ELIF: /* "elif"	*/
-					do_elif();
-					break;
-				case K_ELSE: /* "else"	*/
-					do_else();
-					break;
-				case K_ENDIF: /* "endif"	*/
-					do_endif();
-					break;
-				case K_IF: /* "if"		*/
-					do_if();
-					break;
-				case K_IFDEF: /* "ifdef"	*/
-					do_ifdef(1);
-					break;
-				case K_IFNDEF: /* "ifndef"	*/
-					do_ifdef(0);
-					break;
-				case K_INCLUDE: /* "include"	*/
-					do_include();
-					break;
-				case K_LINE: /* "line"	*/
-					/*	set LineNumber and FileName according to
-					    the arguments.
-					*/
-					if (GetToken(&tk) != INTEGER)
-					{
-						lexerror("bad #line syntax");
-						SkipToNewLine();
-					}
-					else
-						do_line((unsigned int)tk.tk_ival);
-					break;
-				case K_ERROR: /* "error"	*/
-					do_error();
-					break;
-				case K_PRAGMA: /* "pragma"	*/
-					do_pragma();
-					break;
-				case K_UNDEF: /* "undef"	*/
-					do_undef((struct idf*)0);
-					break;
-				default:
-					/* invalid word seen after the '#'	*/
-					lexerror("%s: unknown control", tk.tk_idf->id_text);
-					SkipToNewLine();
-			}
-			break;
-		case INTEGER: /* # <integer> [<filespecifier>]?	*/
-			do_line((unsigned int)tk.tk_ival);
-			break;
-		case EOI: /* only `#' on this line: do nothing, ignore	*/
-			break;
-		default: /* invalid token following '#'		*/
-			lexerror("illegal # line");
-			SkipToNewLine();
-	}
-	EoiForNewline = 0;
-}
-
-#ifdef LINT
-int lint_skip_comment;
-#endif
-
-void skip_block(to_endif) int to_endif;
-{
-	/*	skip_block() skips the input from
-	    1)	a false #if, #ifdef, #ifndef or #elif until the
-	        corresponding #elif (resulting in true), #else or
-	        #endif is read.
-	    2)	a #else corresponding to a true #if, #ifdef,
-	        #ifndef or #elif until the corresponding #endif is
-	        seen.
-	*/
-	register int ch;
-	register int skiplevel = nestlevel; /* current nesting level	*/
-	struct token tk;
-	int toknum;
-
-#ifdef LINT
-	lint_skip_comment++;
-#endif
-	NoUnstack++;
-	for (;;)
-	{
-		ch = GetChar(); /* read first character after newline	*/
-		while (class(ch) == STSKIP)
-			ch = GetChar();
-		if (ch != '#')
-		{
-			if (ch == EOI)
-			{
-				NoUnstack--;
-#ifdef LINT
-				lint_skip_comment--;
-#endif
-				return;
-			}
-			/* A possible '/' is not pushed back */
-			if (ch == '/')
-			{
-				ch = GetChar();
-				if (ch == '/')
-				{
-					skiplinecomment();
-					continue;
-				}
-				else if (ch == '*')
-				{
-					skipcomment();
-					continue;
-				}
-				else
-					UnGetChar();
-			}
-			else
-				UnGetChar();
-			SkipToNewLine();
-			continue;
-		}
-		ReplaceMacros = 0;
-		toknum = GetToken(&tk);
-		ReplaceMacros = 1;
-		if (toknum != IDENTIFIER)
-		{
-			if (toknum != INTEGER)
-			{
-				lexerror("illegal # line");
-			}
-			SkipToNewLine();
-			continue;
-		}
-		/*	an IDENTIFIER: look for #if, #ifdef and #ifndef
-		    without interpreting them.
-		    Interpret #else, #elif and #endif if they occur
-		    on the same level.
-		*/
-		switch (tk.tk_idf->id_resmac)
-		{
-			default:
-			case K_UNKNOWN:
-				/* invalid word seen after the '#'      */
-				lexwarning("%s: unknown control", tk.tk_idf->id_text);
-			/* fallthrough */
-			case K_DEFINE:
-			case K_ERROR:
-			case K_INCLUDE:
-			case K_LINE:
-			case K_PRAGMA:
-			case K_UNDEF:
-			case K_FILE:
-				SkipToNewLine();
-				break;
-			case K_IF:
-			case K_IFDEF:
-			case K_IFNDEF:
-				push_if();
-				SkipToNewLine();
-				break;
-			case K_ELIF:
-				if (ifstack[nestlevel])
-					lexerror("#elif after #else");
-				if (!to_endif && nestlevel == skiplevel)
-				{
-					nestlevel--;
-					push_if();
-					if (ifexpr())
-					{
-						NoUnstack--;
-#ifdef LINT
-						lint_skip_comment--;
-#endif
-						return;
-					}
-				}
-				else
-					SkipToNewLine(); /* otherwise done in ifexpr() */
-				break;
-			case K_ELSE:
-				if (ifstack[nestlevel])
-					lexerror("#else after #else");
-				++(ifstack[nestlevel]);
-				if (!to_endif && nestlevel == skiplevel)
-				{
-					if (SkipToNewLine())
-					{
-						if (!options['o'])
-							lexstrict("garbage following #else");
-					}
-					NoUnstack--;
-#ifdef LINT
-					lint_skip_comment--;
-#endif
-					return;
-				}
-				else
-					SkipToNewLine();
-				break;
-			case K_ENDIF:
-				assert(nestlevel > nestlow);
-				if (nestlevel == skiplevel)
-				{
-					if (SkipToNewLine())
-					{
-						if (!options['o'])
-							lexstrict("garbage following #endif");
-					}
-					nestlevel--;
-					NoUnstack--;
-#ifdef LINT
-					lint_skip_comment--;
-#endif
-					return;
-				}
-				else
-					SkipToNewLine();
-				nestlevel--;
-				break;
-		}
-	}
-}
-
-ifexpr()
-{
-	/*	ifexpr() returns whether the restricted constant
-	    expression following #if or #elif evaluates to true.  This
-	    is done by calling the LLgen generated subparser for
-	    constant expressions.  The result of this expression will
-	    be given in the extern long variable "ifval".
-	*/
-	extern arith ifval;
-	int errors = err_occurred;
-
-	ifval = (arith)0;
-	AccDefined = 1;
-	UnknownIdIsZero = 1;
-	PushLex(); /* NEW parser */
-	If_expr(); /* invoke constant expression parser	*/
-	PopLex(); /* OLD parser */
-	AccDefined = 0;
-	UnknownIdIsZero = 0;
-	return (errors == err_occurred) && (ifval != (arith)0);
-}
-
-do_include()
-{
-	/*	do_include() performs the inclusion of a file.
-	*/
-	char* filenm;
-	char* result;
-	int tok;
-	struct token tk;
-
-	AccFileSpecifier = 1;
-	if (((tok = GetToken(&tk)) == FILESPECIFIER) || tok == STRING)
-		filenm = tk.tk_bts;
-	else
-	{
-		lexerror("bad include syntax");
-		filenm = (char*)0;
-	}
-	AccFileSpecifier = 0;
-	if (SkipToNewLine())
-	{
-		lexerror("bad include syntax");
-	}
-	inctable[0] = WorkingDir;
-	if (filenm)
-	{
-		if (!InsertFile(filenm, &inctable[tok == FILESPECIFIER], &result))
-		{
-			lexerror("cannot open include file \"%s\"", filenm);
-			add_dependency(filenm);
-			free(filenm);
-		}
-		else
-		{
-			add_dependency(result);
-			WorkingDir = getwdir(result);
-			File_Inserted = 1;
-			FileName = result;
-			LineNumber = 0;
-			nestlow = nestlevel;
-#ifdef DBSYMTAB
-			IncludeLevel++;
-			if (options['g'])
-			{
-				C_ms_stb_cst(FileName, N_BINCL, 0, (arith)0);
-			}
-#endif /* DBSYMTAB */
-			if (result != filenm)
-				free(filenm);
-		}
-	}
-}
-
-void do_define()
-{
-	/*	do_define() interprets a #define control line.
-	*/
-	struct idf* id; /* the #defined identifier's descriptor	*/
-	int nformals = -1; /* keep track of the number of formals	*/
-	char* formals[NPARAMS]; /* pointers to the names of the formals	*/
-	char parbuf[PARBUFSIZE]; /* names of formals	*/
-	char* repl_text; /* start of the replacement text	*/
-	int length; /* length of the replacement text	*/
-	register ch;
-	char* get_text();
-
-	/* read the #defined macro's name	*/
-	if (!(id = GetIdentifier(1)))
-	{
-		lexerror("illegal #define line");
-		return;
-	}
-	/*	there is a formal parameter list if the identifier is
-	    followed immediately by a '('.
-	*/
-	ch = GetChar();
-	if (ch == '(')
-	{
-		if ((nformals = getparams(formals, parbuf)) == -1)
-		{
-			SkipToNewLine();
-			return; /* an error occurred	*/
-		}
-		ch = GetChar();
-	}
-	/* read the replacement text if there is any			*/
-	ch = skipspaces(ch, 0); /* find first character of the text	*/
-	assert(ch != EOI);
-	/* UnGetChar() is not right when replacement starts with a '/' */
-	ChPushBack(ch);
-	repl_text = get_text((nformals > 0) ? formals : 0, &length);
-	macro_def(id, repl_text, nformals, length, NOFLAG);
-	LineNumber++;
-}
-
-push_if()
-{
-	if (nestlevel >= IFDEPTH)
-		fatal("too many nested #if/#ifdef/#ifndef");
-	else
-		ifstack[++nestlevel] = 0;
-}
-
-do_elif()
-{
-	if (nestlevel <= nestlow)
-	{
-		lexerror("#elif without corresponding #if");
-		SkipToNewLine();
-	}
-	else
-	{ /* restart at this level as if a #if is detected.  */
-		if (ifstack[nestlevel])
-		{
-			lexerror("#elif after #else");
-			SkipToNewLine();
-		}
-		nestlevel--;
-		push_if();
-		skip_block(1);
-	}
-}
-
-do_else()
-{
-	if (SkipToNewLine())
-		if (!options['o'])
-			lexstrict("garbage following #else");
-	if (nestlevel <= nestlow)
-		lexerror("#else without corresponding #if");
-	else
-	{ /* mark this level as else-d */
-		if (ifstack[nestlevel])
-		{
-			lexerror("#else after #else");
-		}
-		++(ifstack[nestlevel]);
-		skip_block(1);
-	}
-}
-
-do_endif()
-{
-	if (SkipToNewLine())
-	{
-		if (!options['o'])
-			lexstrict("garbage following #endif");
-	}
-	if (nestlevel <= nestlow)
-	{
-		lexerror("#endif without corresponding #if");
-	}
-	else
-		nestlevel--;
-}
-
-do_if()
-{
-	push_if();
-	if (!ifexpr()) /* a false #if/#elif expression */
-		skip_block(0);
-}
-
-do_ifdef(how)
-{
-	register struct idf* id;
-
-	/*	how == 1 : ifdef; how == 0 : ifndef
-	*/
-	push_if();
-	if (!(id = GetIdentifier(1)))
-		lexerror("illegal #ifdef construction");
-	else if (SkipToNewLine())
-		if (!options['o'])
-			lexstrict("garbage following #%s <identifier>", how ? "ifdef" : "ifndef");
-
-	/* The next test is a shorthand for:
-	    (how && !id->id_macro) || (!how && id->id_macro)
-	*/
-	if (how ^ (id && id->id_macro != 0))
-		skip_block(0);
-}
-
-/* argidf != NULL when the undef came from a -U option */
-do_undef(argidf) struct idf* argidf;
-{
-	register struct idf* id = argidf;
-
-	/* Forget a macro definition.	*/
-	if (id || (id = GetIdentifier(1)))
-	{
-		if (id->id_macro)
-		{ /* forget the macro */
-			if (id->id_macro->mc_flag & NOUNDEF)
-			{
-				lexerror("it is not allowed to undef %s", id->id_text);
-			}
-			else
-			{
-				free(id->id_macro->mc_text);
-				free_macro(id->id_macro);
-				id->id_macro = (struct macro*)0;
-			}
-		} /* else: don't complain */
-		if (!argidf)
-		{
-			if (SkipToNewLine())
-				if (!options['o'])
-					lexstrict("garbage following #undef");
-		}
-	}
-	else
-		lexerror("illegal #undef construction");
-}
-
-do_error()
-{
-	int len;
-	char* get_text();
-	char* bp = get_text((char**)0, &len);
-
-	lexerror("user error: %s", bp);
-	free(bp);
-	LineNumber++;
-}
-
-int getparams(buf, parbuf) char* buf[];
-char parbuf[];
-{
-	/*	getparams() reads the formal parameter list of a macro
-	    definition.
-	    The number of parameters is returned.
-	    As a formal parameter list is expected when calling this
-	    routine, -1 is returned if an error is detected, for
-	    example:
-	        #define one(1), where 1 is not an identifier.
-	    Note that the '(' has already been eaten.
-	    The names of the formal parameters are stored into parbuf.
-	*/
-	register char** pbuf = &buf[0];
-	register int c;
-	register char* ptr = &parbuf[0];
-	register char** pbuf2;
-
-	c = GetChar();
-	c = skipspaces(c, 0);
-	if (c == ')')
-	{ /* no parameters: #define name()	*/
-		*pbuf = (char*)0;
-		return 0;
-	}
-	for (;;)
-	{ /* eat the formal parameter list	*/
-		if (class(c) != STIDF && class(c) != STELL)
-		{
-			lexerror("#define: bad formal parameter");
-			return -1;
-		}
-		*pbuf = ptr; /* name of the formal	*/
-		*ptr++ = c;
-		if (ptr >= &parbuf[PARBUFSIZE])
-			fatal("formal parameter buffer overflow");
-		do
-		{ /* eat the identifier name	*/
-			c = GetChar();
-			*ptr++ = c;
-			if (ptr >= &parbuf[PARBUFSIZE])
-				fatal("formal parameter buffer overflow");
-		} while (in_idf(c));
-		*(ptr - 1) = '\0'; /* mark end of the name		*/
-
-		/*	Check if this formal parameter is already used.
-		    Usually, macros do not have many parameters, so ...
-		*/
-		for (pbuf2 = pbuf - 1; pbuf2 >= &buf[0]; pbuf2--)
-		{
-			if (!strcmp(*pbuf2, *pbuf))
-			{
-				lexerror("formal parameter \"%s\" already used", *pbuf);
-			}
-		}
-
-		pbuf++;
-		c = skipspaces(c, 0);
-		if (c == ')')
-		{ /* end of the formal parameter list	*/
-			*pbuf = (char*)0;
-			return pbuf - buf;
-		}
-		if (c != ',')
-		{
-			lexerror("#define: bad formal parameter list");
-			return -1;
-		}
-		c = GetChar();
-		c = skipspaces(c, 0);
-	}
-	/*NOTREACHED*/
-}
-
-void macro_def(id, text, nformals, length, flags) register struct idf* id;
-char* text;
-{
-	register struct macro* newdef = id->id_macro;
-
-	/*	macro_def() puts the contents and information of a macro
-	    definition into a structure and stores it into the symbol
-	    table entry belonging to the name of the macro.
-	    An error is given if there was already a definition
-	*/
-	if (newdef)
-	{ /* is there a redefinition?	*/
-		if (newdef->mc_flag & NOUNDEF)
-		{
-			lexerror("it is not allowed to redefine %s", id->id_text);
-		}
-		else if (!macroeq(newdef->mc_text, text))
-			lexerror("illegal redefine of \"%s\"", id->id_text);
-		free(text);
-		return;
-	}
-	id->id_macro = newdef = new_macro();
-	newdef->mc_text = text; /* replacement text	*/
-	newdef->mc_nps = nformals; /* nr of formals	*/
-	newdef->mc_length = length; /* length of repl. text	*/
-	newdef->mc_flag = flags; /* special flags	*/
-}
-
-int find_name(nm, index) char *nm, *index[];
-{
-	/*	find_name() returns the index of "nm" in the namelist
-	    "index" if it can be found there. 0 is returned if it is
-	    not there.
-	*/
-	register char** ip = &index[0];
-
-	while (*ip)
-		if (strcmp(nm, *ip++) == 0)
-			return ip - &index[0];
-	/* arrived here, nm is not in the name list.	*/
-	return 0;
-}
-
-#define BLANK(ch) ((ch == ' ') || (ch == '\t'))
-
-char* get_text(formals, length) char* formals[];
-int* length;
-{
-	/*	get_text() copies the replacement text of a macro
-	    definition with zero, one or more parameters, thereby
-	    substituting each formal parameter by a special character
-	    (non-ascii: 0200 & (order-number in the formal parameter
-	    list)) in order to substitute this character later by the
-	    actual parameter. The replacement text is copied into
-	    itself because the copied text will contain fewer or the
-	    same amount of characters. The length of the replacement
-	    text is returned.
-
-	    Implementation:
-	    finite automaton : we are interested in
-	    1-  white space, sequences must be mapped onto 1 single
-	        blank.
-	    2-  identifiers, since they might be replaced by some
-	        actual parameter.
-	    3-  strings and character constants, since replacing
-	        variables within them is illegal, and white-space is
-	        significant.
-	    4-  comment, same as for 1
-	    Other tokens will not be seen as such.
-	*/
-	register int c;
-	struct repl repls;
-	register struct repl* repl = &repls;
-	int blank = 0;
-
-	c = GetChar();
-
-	repl->r_ptr = repl->r_text = Malloc(repl->r_size = ITEXTSIZE);
-	*repl->r_ptr = '\0';
-	while ((c != EOI) && (class(c) != STNL))
-	{
-		if (BLANK(c))
-		{
-			blank++;
-			c = GetChar();
-			continue;
-		}
-
-		if (c == '\'' || c == '"')
-		{
-			register int delim = c;
-
-			if (blank)
-			{
-				blank = 0;
-				add2repl(repl, ' ');
-			}
-			do
-			{
-				add2repl(repl, c);
-				if (c == '\\')
-					add2repl(repl, GetChar());
-				c = GetChar();
-			} while (c != delim && c != EOI && class(c) != STNL);
-			if (c == EOI || class(c) == STNL)
-			{
-				lexstrict("unclosed opening %c", delim);
-				break;
-			}
-			add2repl(repl, c);
-			c = GetChar();
-		}
-		else if (c == '/')
-		{
-			c = GetChar();
-			if (c == '*')
-			{
-				skipcomment();
-				blank++;
-				c = GetChar();
-				continue;
-			}
-			else if (c == '/')
-			{
-				skiplinecomment();
-				blank++;
-				c = GetChar();
-				continue;
-			}
-			if (blank)
-			{
-				blank = 0;
-				add2repl(repl, ' ');
-			}
-			add2repl(repl, '/');
-		}
-		else if (formals && (class(c) == STIDF || class(c) == STELL))
-		{
-			char id_buf[IDFSIZE + 1];
-			register char* idp = id_buf;
-			int n;
-
-			/* read identifier: it may be a formal parameter */
-			*idp++ = c;
-			do
-			{
-				c = GetChar();
-				if (idp <= &id_buf[IDFSIZE])
-					*idp++ = c;
-			} while (in_idf(c));
-			*--idp = '\0';
-
-			if (blank)
-			{
-				blank = 0;
-				add2repl(repl, ' ');
-			}
-			/* construct the formal parameter mark or identifier */
-			if (n = find_name(id_buf, formals))
-				add2repl(repl, FORMALP | (char)n);
-			else
-			{
-				idp = id_buf;
-				while (*idp)
-					add2repl(repl, *idp++);
-			}
-		}
-		else if (class(c) == STNUM)
-		{
-			if (blank)
-			{
-				blank = 0;
-				add2repl(repl, ' ');
-			}
-			add2repl(repl, c);
-			if (c == '.')
-			{
-				c = GetChar();
-				if (class(c) != STNUM)
-				{
-					continue;
-				}
-				add2repl(repl, c);
-			}
-			c = GetChar();
-			while (in_idf(c) || c == '.')
-			{
-				add2repl(repl, c);
-				if ((c = GetChar()) == 'e' || c == 'E')
-				{
-					add2repl(repl, c);
-					c = GetChar();
-					if (c == '+' || c == '-')
-					{
-						add2repl(repl, c);
-						c = GetChar();
-					}
-				}
-			}
-		}
-		else
-		{
-			if (blank)
-			{
-				blank = 0;
-				add2repl(repl, ' ');
-			}
-			add2repl(repl, c);
-			c = GetChar();
-		}
-	}
-	*length = repl->r_ptr - repl->r_text;
-	return Realloc(repl->r_text, (unsigned)(repl->r_ptr - repl->r_text + 1));
-}
-
-/*	macroeq() decides whether two macro replacement texts are
-    identical.  This version compares the texts, which occur
-    as strings, without taking care of the leading and trailing
-    blanks (spaces and tabs).
-*/
-macroeq(s, t) register char* s, *t;
-{
-
-	/* skip leading spaces	*/
-	while (BLANK(*s))
-		s++;
-	while (BLANK(*t))
-		t++;
-	/* first non-blank encountered in both strings	*/
-	/* The actual comparison loop:			*/
-	while (*s && *s == *t)
-		s++, t++;
-	/* two cases are possible when arrived here:	*/
-	if (*s == '\0')
-	{ /* *s == '\0'		*/
-		while (BLANK(*t))
-			t++;
-		return *t == '\0';
-	}
-	else
-	{ /* *s != *t		*/
-		while (BLANK(*s))
-			s++;
-		while (BLANK(*t))
-			t++;
-		return (*s == '\0') && (*t == '\0');
-	}
-}
-#else /* NOPP */
-
 struct idf* GetIdentifier(skiponerr) int skiponerr; /* skip the rest of the line on error */
 {
 	/*	returns a pointer to the descriptor of the identifier that is
@@ -929,7 +70,6 @@ domacro()
 	EoiForNewline = 0;
 	SkipToNewLine();
 }
-#endif /* NOPP */
 
 do_line(l) unsigned int l;
 {
diff --git a/lang/cem/cemcom.ansi/dumpidf.c b/lang/cem/cemcom.ansi/dumpidf.c
index e5d6d0941..7782d0bb4 100644
--- a/lang/cem/cemcom.ansi/dumpidf.c
+++ b/lang/cem/cemcom.ansi/dumpidf.c
@@ -106,15 +106,6 @@ dumpidf(idf, opt)
 	
 	if (!idf)
 		return;
-#ifndef NOPP
-	if ((opt&1) && idf->id_macro)	{
-		if (!started++)	{
-			newline();
-			print("%s:", idf->id_text);
-		}
-		print(" macro");
-	}
-#endif /* NOPP */
 	if ((opt&2) && idf->id_reserved)	{
 		if (!started++)	{
 			newline();
diff --git a/lang/cem/cemcom.ansi/idf.str b/lang/cem/cemcom.ansi/idf.str
index fab968321..06caa7f3e 100644
--- a/lang/cem/cemcom.ansi/idf.str
+++ b/lang/cem/cemcom.ansi/idf.str
@@ -8,10 +8,6 @@
 #include	"parameters.h"
 
 struct id_u {
-#ifndef NOPP
-	struct macro *idd_macro;
-	int idd_resmac;		/* if nonzero: keyword of macroproc. 	*/
-#endif /* NOPP */
 	int idd_reserved;	/* non-zero for reserved words		*/
 	char *idd_file;		/* file containing the occurrence	*/
 	unsigned int idd_line;	/* line number of the occurrence	*/
@@ -36,14 +32,5 @@ struct id_u {
 
 #include <idf_pkg.spec>
 
-#ifndef NOPP
-struct dependency	{
-	struct dependency *next;
-	struct idf *dep_idf;
-};
-
-/* ALLOCDEF "dependency" 10 */
-#endif /* NOPP */
-
 extern int level;
 extern struct idf *gen_idf();
diff --git a/lang/cem/cemcom.ansi/init.c b/lang/cem/cemcom.ansi/init.c
deleted file mode 100644
index 3b3403aa4..000000000
--- a/lang/cem/cemcom.ansi/init.c
+++ /dev/null
@@ -1,99 +0,0 @@
-/*
- * (c) copyright 1987 by the Vrije Universiteit, Amsterdam, The Netherlands.
- * See the copyright notice in the ACK home directory, in the file "Copyright".
- */
-/* $Id$ */
-/* PREPROCESSOR: INITIALIZATION ROUTINES */
-
-#include	<stdlib.h>
-#include	<string.h>
-#include        <time.h>
-#include	"parameters.h"
-
-#ifndef NOPP
-#include	<system.h>
-#include	<alloc.h>
-#include	<time.h>
-#include    "idf.h"
-#include	"class.h"
-#include	"macro.h"
-
-extern char *sprint();
-
-struct mkey	{
-	char *mk_reserved;
-	int mk_key;
-} mkey[] =	{
-	{"define",	K_DEFINE},
-	{"elif",	K_ELIF},
-	{"else",	K_ELSE},
-	{"endif",	K_ENDIF},
-	{"error",	K_ERROR},
-	{"if",		K_IF},
-	{"ifdef",	K_IFDEF},
-	{"ifndef",	K_IFNDEF},
-	{"include",	K_INCLUDE},
-	{"line",	K_LINE},
-	{"pragma",	K_PRAGMA},
-	{"undef",	K_UNDEF},
-	{0,		K_UNKNOWN}
-};
-
-init_pp()
-{
-	static char *months[12] = {
-		"Jan", "Feb", "Mar", "Apr", "May", "Jun",
-		"Jul", "Aug", "Sep", "Oct", "Nov", "Dec"
-	};
-	time_t clock;
-	static char dbuf[30];
-	static char tbuf[30];
-	struct tm  *tp;
-
-	/*	Initialise the control line keywords (if, include, define, etc)
-		Although the lexical analyzer treats them as identifiers, the
-		control line handler can recognize them as keywords by the
-		id_resmac field of the identifier.
-	*/
-	{
-		register struct mkey *mk = &mkey[0];
-
-		while (mk->mk_reserved)	{
-			register struct idf *idf = str2idf(mk->mk_reserved, 0);
-			
-			if (idf->id_resmac)
-				fatal("maximum identifier length insufficient");
-			idf->id_resmac = mk->mk_key;
-			mk++;
-		}
-	}
-
-	/*	Initialize __LINE__, __FILE__, __DATE__, __TIME__,
-		and __STDC__ macro definitions.
-	*/
-	clock = time(NULL);
-	tp = localtime(&clock);
-
-	/* __DATE__ */
-	sprint(dbuf, "\"%s %02d %d\"", months[tp->tm_mon],
-			tp->tm_mday, tp->tm_year+1900);
-	if (tp->tm_mday < 10) dbuf[5] = ' ';		/* hack */
-	macro_def(str2idf("__DATE__", 0), dbuf, -1, strlen(dbuf), NOUNDEF);
-
-	/* __TIME__ */
-	sprint(tbuf, "\"%02d:%02d:%02d\"", tp->tm_hour, tp->tm_min, tp->tm_sec);
-	macro_def(str2idf("__TIME__", 0), tbuf, -1, strlen(tbuf), NOUNDEF);
-
-	/* __LINE__	*/
-	macro_def(str2idf("__LINE__", 0), "0", -1, 1, NOUNDEF | FUNC);
-
-	/* __FILE__	*/
-	macro_def(str2idf("__FILE__", 0), "", -1, 1, NOUNDEF | FUNC);
-
-	/* __STDC__ */
-	macro_def(str2idf("__STDC__", 0), "1", -1, 1, NOUNDEF);
-
-	/* defined(??) */
-	macro_def(str2idf("defined", 0), "", 1, 1, NOUNDEF | FUNC);
-}
-#endif /* NOPP */
diff --git a/lang/cem/cemcom.ansi/input.c b/lang/cem/cemcom.ansi/input.c
index 2b652b64f..dea9a4892 100644
--- a/lang/cem/cemcom.ansi/input.c
+++ b/lang/cem/cemcom.ansi/input.c
@@ -18,50 +18,10 @@ struct file_info	finfo;
 #include <inp_pkg.body>
 #include <alloc.h>
 
-#ifndef NOPP
-#ifdef DBSYMTAB
-#include <stb.h>
-#include <em.h>
-extern int      IncludeLevel;
-extern char	options[];
-#endif
-
-char *
-getwdir(fn)
-	register char *fn;
-{
-	register char *p;
-	char *strrchr();
-
-	p = strrchr(fn, '/');
-	while (p && *(p + 1) == '\0') {	/* remove trailing /'s */
-		*p = '\0';
-		p = strrchr(fn, '/');
-	}
-
-	if (fn[0] == '\0' || (fn[0] == '/' && p == &fn[0])) /* absolute path */
-		return "";
-	if (p) {
-		*p = '\0';
-		fn = Salloc(fn,(unsigned) (p - &fn[0] + 1));
-		*p = '/';
-		return fn;
-	}
-	return "";
-}
-
-int	InputLevel;
-extern int		nestlevel;
-#endif /* NOPP */
-
 int	NoUnstack;
 
 AtEoIT()
 {
-#ifndef NOPP
-	InputLevel--;
-	unstackrepl();
-#endif /* NOPP */
 	return 0;
 }
 
@@ -69,22 +29,6 @@ extern char *source;
 
 AtEoIF()
 {
-#ifndef NOPP
-	if (nestlevel != nestlow) lexwarning("missing #endif");
-	else
-#endif /* NOPP */
 	if (NoUnstack) lexerror("unexpected EOF");
-#ifndef NOPP
-	nestlevel = nestlow;
-#ifdef DBSYMTAB
-	if (options['g'] && IncludeLevel > 0) {
-		C_ms_stb_cst(FileName, N_EINCL, 0, (arith) 0);
-	}
-	IncludeLevel--;
-#endif
-	/* We don't free WorkingDir and FileName here because the rest of the
-	 * compiler may be holding pointers to them for displaying error messages.
-	 */
-#endif /* NOPP */
 	return 0;
 }
diff --git a/lang/cem/cemcom.ansi/macro.str b/lang/cem/cemcom.ansi/macro.str
index f229cac9b..6f96c3d8f 100644
--- a/lang/cem/cemcom.ansi/macro.str
+++ b/lang/cem/cemcom.ansi/macro.str
@@ -6,47 +6,3 @@
 /* PREPROCESSOR: DEFINITION OF MACRO DESCRIPTOR */
 
 #include	"parameters.h"
-
-#ifndef NOPP
-/*	The flags of the mc_flag field of the macro structure. Note that
-	these flags can be set simultaneously.
-*/
-#define	NOFLAG		0		/* no special flags	*/
-#define	FUNC		0x1		/* function attached    */
-#define	NOUNDEF		0x2		/* reserved macro	*/
-#define	NOREPLACE	0x4		/* prevent recursion	*/
-
-#define	FORMALP 0200	/* mask for creating macro formal parameter	*/
-
-/*	The macro descriptor is very simple, except the fact that the
-	mc_text, which points to the replacement text, contains the
-	non-ascii characters \201, \202, etc, indicating the position of a
-	formal parameter in this text.
-*/
-struct macro	{
-	struct macro *next;
-	char *	mc_text;	/* the replacement text		*/
-	int	mc_nps;		/* number of formal parameters	*/
-	int	mc_length;	/* length of replacement text	*/
-	char	mc_flag;	/* marking this macro		*/
-};
-
-/* ALLOCDEF "macro" 20 */
-
-/* `token' numbers of keywords of command-line processor
-*/
-#define	K_UNKNOWN	0
-#define	K_DEFINE	1
-#define	K_ELIF		2
-#define	K_ELSE		3
-#define	K_ENDIF		4
-#define	K_ERROR		5
-#define	K_IF		6
-#define	K_IFDEF		7
-#define	K_IFNDEF	8
-#define	K_INCLUDE	9
-#define	K_LINE		10
-#define	K_PRAGMA	11
-#define	K_UNDEF		12
-#define K_FILE          100     /* for dependency generator */
-#endif /* NOPP */
diff --git a/lang/cem/cemcom.ansi/main.c b/lang/cem/cemcom.ansi/main.c
index f521453ba..d8e951af3 100644
--- a/lang/cem/cemcom.ansi/main.c
+++ b/lang/cem/cemcom.ansi/main.c
@@ -29,19 +29,6 @@ extern struct tokenname tkidf[];
 extern char *symbol2str();
 extern char options[128];
 
-#ifndef NOPP
-int inc_pos = 1;			/* place where next -I goes */
-int inc_total = 0;
-int inc_max;
-char **inctable;
-
-extern int do_dependencies;
-extern char *dep_file;
-static File *dep_fd = STDOUT;
-
-extern char *getwdir();
-#endif /* NOPP */
-
 struct sp_id special_ids[] =	{
 	{"__setjmp", SP_SETJMP},	/* non-local goto's are registered */
 	{0, 0}
@@ -74,10 +61,6 @@ int
 	union_align = AL_UNION;
 #endif /* NOCROSS */
 
-#ifndef NOPP
-arith ifval;	/* ifval will contain the result of the #if expression	*/
-#endif /* NOPP */
-
 char *prog_name;
 
 main(argc, argv)
@@ -86,17 +69,6 @@ main(argc, argv)
 	/* parse and interpret the command line options	*/
 	prog_name = argv[0];
 
-#ifndef NOPP
-	inctable = (char **) Malloc(10 * sizeof(char *));
-	inctable[0] = "";
-	inctable[1] = 0;
-	inctable[2] = 0;
-	inc_total = 3;
-	inc_max = 10;
-
-	init_pp();	/* initialise the preprocessor macros	*/
-#endif /* NOPP */
-
 	/*	Note: source file "-" indicates that the source is supplied
 		as standard input.  This is only allowed if INP_READ_IN_ONE is
 		not defined!
@@ -122,83 +94,10 @@ main(argc, argv)
 	if (options['m']) Info();
 #endif	/* DEBUG */
 
-#ifndef NOPP
-	if (do_dependencies) {
-	    extern char *source;
-
-	    list_dependencies(source);
-	}
-#endif
 	sys_stop(err_occurred ? S_EXIT : S_END);
 	/*NOTREACHED*/
 }
 
-#ifndef NOPP
-
-struct dependency    *file_head;
-extern char *strrchr();
-
-list_dependencies(source)
-char *source;
-{
-    register struct dependency *p = file_head;
-
-    if (source) {
-	register char *s = strrchr(source, '.');
-
-	if (s && *(s+1)) {
-	    s++;
-	    *s++ = 'o';
-	    *s = '\0';
-	    /* the source may be in another directory than the
-	     * object generated, so don't include the pathname
-	     * leading to it.
-             */
-            if (s = strrchr(source, '/')) {
-		source = s + 1;
-	    }
-	}
-	else source = 0;
-    }
-    if (dep_file && !sys_open(dep_file, OP_WRITE, &dep_fd)) {
-	fatal("could not open %s", dep_file);
-    }
-    while (p) {
-	dependency(p->dep_idf->id_text, source);
-	p = p->next;
-    }
-}
-
-add_dependency(s)
-char *s;
-{
-    register struct idf *p = str2idf(s, 1);
-
-    if (! p->id_resmac) {
-	register struct dependency *q = new_dependency();
-
-	p->id_resmac = K_FILE;
-	q->dep_idf = p;
-	q->next = file_head;
-	file_head = q;
-    }
-}
-
-void
-dependency(s, source)
-char *s, *source;
-{
-    if (options['i'] && !strncmp(s, "/usr/include/", 13)) {
-	return;
-    }
-    if (options['m'] && source) {
-	fprint(dep_fd, "%s: %s\n", source, s);
-    }
-    else    fprint(dep_fd, "%s\n", s);
-}
-
-#endif /* NOPP */
-
 char *source = 0;
 
 #ifdef GEN_NM_LIST
@@ -213,19 +112,10 @@ compile(argc, argv)
 	register char *destination = 0;
 #endif	/* LINT */
 
-#ifdef DEBUG
-#ifndef NOPP
-	int pp_only = options['E'] || options['P'] || options['C'];
-#endif /* NOPP */
-#endif
-
 	switch (argc) {
 	case 1:
 #ifndef	LINT
 #ifdef DEBUG
-#ifndef NOPP
-		if (!pp_only)
-#endif /* NOPP */
 #endif
 			fatal("%s: destination file not specified", prog_name);
 #endif	/* LINT */
@@ -277,20 +167,7 @@ compile(argc, argv)
 			: 0);
 #endif	/* LINT */
 
-#ifndef NOPP
-	WorkingDir = getwdir(source);
-	PushLex();			/* initialize lex machine */
-#else /* NOPP */
 	GetToken(&ahead);
-#endif /* NOPP */
-
-#ifdef DEBUG
-#ifndef NOPP
-	if (pp_only) /* run the preprocessor as if it is stand-alone	*/
-		preprocess();
-	else
-#endif /* NOPP */
-#endif /* DEBUG */
 	{
 		/* compile the source text			*/
 		C_program();
@@ -311,9 +188,6 @@ compile(argc, argv)
 			dumpidftab("end of main", options['f'] ? 7 : 0);
 #endif	/* DEBUG */
 	}
-#ifndef	NOPP
-	PopLex();
-#endif	/* NOPP */
 }
 
 init()
@@ -395,76 +269,6 @@ init_specials(si)
 }
 
 #ifdef DEBUG
-#ifndef NOPP
-preprocess()
-{
-	/*	preprocess() is the "stand-alone" preprocessor which
-		consecutively calls the lexical analyzer LLlex() to get
-		the tokens and prints them in a suitable way.
-	*/
-	static unsigned int lastlineno = 0;
-	static char *lastfilenm = "";
-
-	while (LLlex() !=  EOI)	{
-		if (lastlineno != dot.tk_line)	{
-			if (strcmp(lastfilenm, dot.tk_file) == 0)	{
-				if (dot.tk_line - lastlineno <= 1)	{
-					lastlineno++;
-					print("\n");
-				}
-				else	{
-					lastlineno = dot.tk_line;
-					if (!options['P'])
-						print("\n#line %ld \"%s\"\n",
-							lastlineno,
-							lastfilenm
-						);
-				}
-			}
-			else	{
-				lastfilenm = dot.tk_file;
-				lastlineno = dot.tk_line;
-				if (!options['P'])
-					print("\n#line %ld \"%s\"\n",
-						lastlineno, lastfilenm);
-			}
-		}
-		else
-		if (strcmp(lastfilenm, dot.tk_file) != 0)	{
-			lastfilenm = dot.tk_file;
-			if (!options['P'])
-				print("\n#line %ld \"%s\"\n",
-					lastlineno, lastfilenm);
-		}
-		switch (DOT)	{
-		case IDENTIFIER:
-		case TYPE_IDENTIFIER:
-			print("%s ", dot.tk_idf->id_text);
-			break;
-		case STRING:
-		{
-			char sbuf[1024];	/* a transient buffer */
-
-			print("\"%s\" ", bts2str(dot.tk_bts, dot.tk_len -
-			1, sbuf));
-			break;
-		}
-		case INTEGER:
-			print("%ld ", dot.tk_ival);
-			break;
-		case FLOATING:
-			print("%s ", dot.tk_fval);
-			break;
-		case EOI:
-		case EOF:
-			return;
-		default:	/* very expensive...	*/
-			print("%s ", symbol2str(DOT));
-		}
-	}
-}
-#endif /* NOPP */
-
 Info()
 {
 	extern int cnt_string_cst, cnt_formal,
diff --git a/lang/cem/cemcom.ansi/options.c b/lang/cem/cemcom.ansi/options.c
index a23ff3405..c0b411934 100644
--- a/lang/cem/cemcom.ansi/options.c
+++ b/lang/cem/cemcom.ansi/options.c
@@ -16,16 +16,6 @@
 #include	"sizes.h"
 #include	"align.h"
 
-#ifndef NOPP
-extern char **inctable;
-extern int inc_pos;
-extern int inc_max;
-extern int inc_total;
-int do_dependencies = 0;
-char *dep_file = 0;
-
-#endif /* NOPP */
-
 char options[128];			/* one for every char	*/
 #ifdef	LINT
 char loptions[128];			/* one for every char	*/
@@ -60,18 +50,6 @@ next_option:			/* to allow combined one-char options */
 		goto next_option;
 
 #ifndef LINT
-#ifndef NOPP
-        case 'A' :      /* Amake dependency generation */
-                do_dependencies = 1;
-                if (*text) {
-                        dep_file = text;
-                }
-                break;
-        case 'i':
-        case 'm':
-             	options[opt] = 1;
-            	break;
-#endif /* NOPP */
 #endif /* LINT */
 #ifdef DBSYMTAB
 	case 'g':	/* symbol table for debugger */
@@ -110,64 +88,6 @@ next_option:			/* to allow combined one-char options */
 		goto next_option;
 #endif	/* LINT */
 
-#ifndef NOPP
-	case 'D' :	{	/* -Dname :	predefine name		*/
-		register char *cp = text, *name, *mactext;
-		unsigned maclen;
-
-		if (class(*cp) != STIDF && class(*cp) != STELL) {
-			error("identifier missing in -D%s", text);
-			break;
-		}
-
-		name = cp;
-
-		while (*cp && in_idf(*cp)) {
-			++cp;
-		}
-
-		if (!*cp) {			/* -Dname */
-			maclen = 1;
-			mactext = Salloc("1", 2);
-		}
-		else
-		if (*cp == '=')	{		/* -Dname=text	*/
-			*cp++ = '\0';		/* end of name	*/
-			maclen = (unsigned) strlen(cp);
-			mactext = Salloc(cp, maclen + 1);
-		}
-		else	{			/* -Dname?? */
-			error("malformed option -D%s", text);
-			break;
-		}
-
-		macro_def(str2idf(name, 0), mactext, -1, (int)maclen, NOFLAG);
-		break;
-	}
-
-	case 'I' :	/* -Ipath : insert "path" into include list	*/
-		if (*text)	{
-			int i;
-			register char *new = text;
-			
-			if (inc_total >= inc_max) {
-				inctable = (char **)
-				   Realloc((char *)inctable,
-					   (unsigned)((inc_max+=10)*sizeof(char *)));
-			}
-				
-			for (i = inc_pos++; i < inc_total ; i++) {
-				char *tmp = inctable[i];
-				
-				inctable[i] = new;
-				new = tmp;
-			}
-			inc_total++;
-		}
-		else inctable[inc_pos] = 0;
-		break;
-#endif /* NOPP */
-
 	case 'M':	/* maximum identifier length */
 		idfsize = txt2int(&text);
 		if (*text || idfsize <= 0)
@@ -197,12 +117,6 @@ next_option:			/* to allow combined one-char options */
 		break;
 	}
 		
-#ifndef NOPP
-	case 'U' :		/* -Uname :	undefine predefined	*/
-		if (*text) do_undef(str2idf(text, 0));
-		break;
-#endif /* NOPP */
-
 #ifndef	LINT
 #ifndef NOCROSS
 	case 'V' :	/* set object sizes and alignment requirements	*/
diff --git a/lang/cem/cemcom.ansi/program.g b/lang/cem/cemcom.ansi/program.g
index 861c97b2e..631603cff 100644
--- a/lang/cem/cemcom.ansi/program.g
+++ b/lang/cem/cemcom.ansi/program.g
@@ -61,10 +61,6 @@
 #include	"l_lint.h"
 #endif	/* LINT */
 
-#ifndef NOPP
-extern arith ifval;
-#endif /* NOPP */
-
 extern error();
 }
 
@@ -75,14 +71,6 @@ control_if_expression
 :
 	constant_expression(&exprX)
 		{
-#ifndef NOPP
-			register struct expr *expr = exprX;
-			if (expr->ex_flags & EX_SIZEOF)
-				expr_error(expr,
-					"sizeof not allowed in preprocessor");
-			ifval = expr->VL_VALUE;
-			free_expression(expr);
-#endif /* NOPP */
 		}
 ;
 
diff --git a/lang/cem/cemcom.ansi/replace.c b/lang/cem/cemcom.ansi/replace.c
deleted file mode 100644
index a1c53f32b..000000000
--- a/lang/cem/cemcom.ansi/replace.c
+++ /dev/null
@@ -1,808 +0,0 @@
-/*
- * (c) copyright 1987 by the Vrije Universiteit, Amsterdam, The Netherlands.
- * See the copyright notice in the ACK home directory, in the file "Copyright".
- */
-/* $Id$ */
-/*  M A C R O   R E P L A C E M E N T */
-
-#include	<assert.h>
-#include	<stdlib.h>
-#include	<string.h>
-#include	"parameters.h"
-
-#ifndef NOPP
-
-#include	<ack_string.h>
-#include	<alloc.h>
-#include    "idf.h"
-#include	"input.h"
-#include	"macro.h"
-#include	"arith.h"
-#include	"LLlex.h"
-#include	"class.h"
-#include	"replace.h"
-
-extern struct idf *GetIdentifier();
-extern int InputLevel;
-struct repl *ReplaceList;	/* list of currently active macros */
-
-void macro2buffer();
-void getactuals();
-void expand_defined();
-
-int
-replace(idf)
-	register struct idf *idf;
-{
-	/*	replace is called by the lexical analyzer to perform
-		macro replacement. The routine actualy functions as a
-		higher interface to the real thing: expand_macro().
-	*/
-	struct repl *repl;
-
-	if (!(idf->id_macro)) return 0;
-	if (idf->id_macro->mc_flag & NOREPLACE)
-		return 0;
-	repl = new_repl();
-	repl->r_ptr = repl->r_text = Malloc(repl->r_size = LAPBUF);
-	repl->r_args = new_args();
-	repl->r_idf = idf;
-	if (!expand_macro(repl, idf))
-		return 0;
-	InputLevel++;
-	InsertText(repl->r_text, (int)(repl->r_ptr - repl->r_text));
-	idf->id_macro->mc_flag |= NOREPLACE;
-	repl->r_level = InputLevel;
-	repl->next = ReplaceList;
-	ReplaceList = repl;
-	return 1;
-}
-
-unstackrepl()
-{
-	Unstacked++;
-}
-
-freeargs(args)
-	struct args *args;
-{
-	register int i;
-
-	/* We must don't know how many parameters were specified, so be
-	 * prepared to free all NPARAMS parameters.
-	 * When an expvec is !0, the rawvec will also be !0.
-	 * When an expvec is 0, all remaining vectors will also be 0.
-	 */
-	for (i = 0; i < NPARAMS; i++) {
-		if (args->a_expvec[i]) {
-			free(args->a_expvec[i]);
-			free(args->a_rawvec[i]);
-		} else break;
-	}
-	free_args(args);
-}
-
-EnableMacros()
-{
-	register struct repl *r = ReplaceList, *prev = 0;
-
-	assert(Unstacked > 0);
-	while(r) {
-		struct repl *nxt = r->next;
-
-		if (r->r_level > InputLevel) {
-			r->r_idf->id_macro->mc_flag &= ~NOREPLACE;
-			if (!prev) ReplaceList = nxt;
-			else prev->next = nxt;
-			free(r->r_text);
-			freeargs(r->r_args);
-			free_repl(r);
-		}
-		else prev = r;
-		r = nxt;
-	}
-	Unstacked = 0;
-}
-
-expand_macro(repl, idf)
-	register struct repl *repl;
-	register struct idf *idf;
-{
-	/*	expand_macro() does the actual macro replacement.
-		"idf" is a description of the identifier which
-		caused the replacement.
-		If the identifier represents a function-like macro
-		call, the number of actual parameters is checked
-		against the number of formal parameters. Note that
-		in ANSI C the parameters are expanded first;
-		this is done by calling getactuals().
-		When the possible parameters are expanded, the replace-
-		ment list associated with "idf" is expanded.
-		expand_macro() returns 1 if the replacement succeeded
-		and 0 if some error occurred.
-
-		A special case is "defined". This acts as a unary operator
-		on a single, unexpanded identifier, which may be surrounded
-		by parenthesis. The function expand_defined() handles this.
-	*/
-	register struct macro *mac = idf->id_macro;
-	struct args *args = repl->r_args;
-	register int ch;
-
-	if (mac->mc_nps != -1) {	/* with parameter list	*/
-		if (mac->mc_flag & FUNC) {
-			/* the following assertion won't compile:
-			assert(!strcmp("defined", idf->id_text));
-			expand the assert macro by hand (??? dirty, temporary)
-			*/
-#ifdef	DEBUG
-			if (strcmp("defined", idf->id_text))
-				crash("in %s, %u: assertion %s failed",
-					__FILE__, __LINE__ - 2,
-					"strcmp(\"defined\", idf->id_text)");
-#endif
-			if (!AccDefined) return 0;
-			expand_defined(repl);
-			return 1;
-		}
-
-		ch = GetChar();
-		ch = skipspaces(ch,1);
-		if (ch != '(') {	/* no replacement if no () */
-			ChPushBack(ch);
-			return 0;
-		} else
-			getactuals(repl, idf);
-
-	}
-
-	if (mac->mc_flag & FUNC) /* this macro leads to special action */
-		macro_func(idf);
-
-	macro2buffer(repl, idf, args);
-
-	/*	According to the ANSI definition:
-
-			#define	a +
-			a+b; --> + + b ;
-
-		'a' must be substituded, but the result should be
-		three tokens: + + ID. Therefore a token separator is
-		inserted after the replacement.
-	*/
-	if (repl->r_text == repl->r_ptr || *(repl->r_ptr - 1) != TOKSEP) {
-		add2repl(repl, TOKSEP);
-	}
-	return 1;
-}
-
-void
-expand_defined(repl)
-	register struct repl *repl;
-{
-	register int ch = GetChar();
-	struct idf *id;
-	int parens = 0;
-
-	ch = skipspaces(ch, 0);
-
-	if (ch == '(') {
-		parens++;
-		ch = GetChar();
-		ch = skipspaces(ch, 0);
-	}
-	if ((class(ch) != STIDF) && (class(ch) != STELL)) {
-		error("identifier missing");
-		if (parens && ch != ')') error(") missing");
-		if (!parens || ch != ')') ChPushBack(ch);
-		add2repl(repl, '0');
-		return;
-	}
-	ChPushBack(ch);
-	id = GetIdentifier(0);
-	assert(id || class(ch) == STELL);
-	ch = GetChar();
-	ch = skipspaces(ch, 0);
-	if (parens && ch != ')') error(") missing");
-	if (!parens || ch != ')') ChPushBack(ch);
-	add2repl(repl, (id && id->id_macro) ? '1' : '0');
-	add2repl(repl, ' ');
-}
-
-newarg(args)
-	struct args *args;
-{
-	args->a_expptr = args->a_expbuf = Malloc(args->a_expsize = ARGBUF);
-	args->a_rawptr = args->a_rawbuf = Malloc(args->a_rawsize = ARGBUF);
-}
-
-void
-getactuals(repl, idf)
-	struct repl *repl;
-	register struct idf *idf;
-{
-	/*	Get the actual parameters from the input stream.
-		The hard part is done by actual(), only comma's and
-		other syntactic trivialities are checked here.
-	*/
-	register struct args *args = repl->r_args;
-	register int nps = idf->id_macro->mc_nps;
-	register int argcnt;
-	register int ch;
-
-	argcnt = 0;
-	newarg(args);
-	if ((ch = GetChar()) != ')') {
-		UnGetChar();
-		while ((ch = actual(repl)) != ')' ) {
-			if (ch != ',') {
-				lexerror("illegal macro call");
-				return;
-			}
-			stash(repl, '\0', 1);
-			args->a_expvec[argcnt] = args->a_expbuf;
-			args->a_rawvec[argcnt] = args->a_rawbuf;
-			++argcnt;
-			if (argcnt == STDC_NPARAMS)
-				lexstrict("number of parameters exceeds ANSI standard");
-			if (argcnt >= NPARAMS)
-				fatal("argument vector overflow");
-			newarg(args);
-		}
-		stash(repl, '\0', 1);
-		args->a_expvec[argcnt] = args->a_expbuf;
-		args->a_rawvec[argcnt] = args->a_rawbuf;
-		++argcnt;
-	}
-	if (argcnt < nps)
-		lexerror("too few macro arguments");
-	else if (argcnt > nps)
-		lexerror("too many macro arguments");
-}
-
-saveraw(repl)
-struct repl *repl;
-{
-	register struct repl *nrepl = ReplaceList;
-	register struct args *ap = nrepl->r_args;
-	register char *p;
-
-	/* stash identifier name */
-	for (p = nrepl->r_idf->id_text; *p != '\0'; p++)
-		stash(repl, *p, -1);
-
-	/*	The following code deals with expanded function
-		like macro calls. It makes the following code
-		work:
-
-			#define	def(a,b)	x(a,b)
-			#define	glue(a,b)	a ## b
-
-			glue(abc,def(a,b))
-
-		Results in:
-
-			abcdef(a,b);
-	*/
-	if (ap->a_rawvec[0]) {
-		/* stash arguments */
-		register int i;
-
-		for (i = 0; ap->a_rawvec[i] != (char *)0; i++) {
-			if (i == 0) stash(repl, '(', -1);
-			else stash(repl, ',', -1);
-			for (p = ap->a_rawvec[i]; *p != '\0'; p++)
-				stash(repl, *p, -1);
-		}
-		stash(repl, ')', -1);
-	}
-}
-
-int
-actual(repl)
-	struct repl *repl;
-{
-	/*	This routine deals with the scanning of an actual parameter.
-		It keeps in account the opening and closing brackets,
-		preprocessor numbers, strings and character constants.
-	*/
-	register int ch = 0;
-	register int level = 0, nostashraw = 0;
-	int lastch;
-	static int Unstacked_missed;
-
-	while (1) {
-		lastch = ch;
-		ch = GetChar();
-
-		if (nostashraw 
-		    && nostashraw >= Unstacked_missed) {
-			nostashraw -= Unstacked_missed;
-			Unstacked_missed = 0;
-		}
-		if (Unstacked) {
-			nostashraw -= Unstacked;
-			if (nostashraw < 0) {
-				Unstacked_missed = -nostashraw;
-				nostashraw = 0;
-			}
-			EnableMacros();
-		}
-		if (class(ch) == STIDF || class(ch) == STELL) {
-			/*	Scan a preprocessor identifier token. If the
-				token is a macro, it is expanded first.
-			*/
-			char buf[(IDFSIZE > NUMSIZE ? IDFSIZE : NUMSIZE) + 1];
-			register char *p = buf;
-			register struct idf *idef;
-			register int pos = -1;
-			extern int idfsize;
-			int NoExpandMacro;
-
-			if (ch == NOEXPM) {
-				NoExpandMacro= 1;
-				ch = GetChar();
-			} else NoExpandMacro = 0;
-
-			do {
-				if (++pos < idfsize) {
-					*p++ = ch;
-				}
-				ch = GetChar();
-			} while (in_idf(ch));
-			*p++ = '\0';
-			ch = '\0';	/* It could be an unstashed TOKSEP */
-			UnGetChar();
-
-			/*	When the identifier has an associated macro
-				replacement list, it's expanded.
-			*/
-			idef = findidf(buf);
-			if (!idef || NoExpandMacro || !replace(idef)) {
-				if (NoExpandMacro
-				    || (idef && idef->id_macro
-				        && (idef->id_macro->mc_flag & NOREPLACE)))
-					stash(repl, NOEXPM, !nostashraw);
-				for (p = buf; *p != '\0'; p++)
-					stash(repl, *p, !nostashraw);
-			} else {
-				if (!nostashraw) saveraw(repl);
-				nostashraw++;
-			}
-		} else if (class(ch) == STNUM) {
-			/*	a preprocessing number has the following
-				regular expression:
-				    [0-9|"."[0-9]]{[0-9"."a-zA-Z_]|{[Ee][+-]}}*
-			*/
-			stash(repl, ch, !nostashraw);
-			if (ch == '.') {
-				ch = GetChar();
-				if (class(ch) != STNUM) {
-					ch = '\0';	/* It could be an unstashed TOKSEP */
-					UnGetChar();
-					continue;
-				}
-				else stash(repl, ch, !nostashraw);
-			}
-			ch = GetChar();
-			while (in_idf(ch) || ch == '.') {
-				stash(repl, ch, !nostashraw);
-				if ((ch = GetChar()) == 'e' || ch == 'E') {
-					stash(repl, ch, !nostashraw);
-					ch = GetChar();
-					if (ch == '+' || ch == '-') {
-						stash(repl, ch, !nostashraw);
-						ch = GetChar();
-					}
-				}
-			}
-			ch = '\0';	/* It could be an unstashed TOKSEP */
-			UnGetChar();
-		} else if (ch == '(') {
-			/* a comma may occur between parentheses */
-			level++;
-			stash(repl, ch, !nostashraw);
-		} else if (ch == ')') {
-			level--;
-			/* closing parenthesis of macro call */
-			if (level < 0) return ')';
-			stash(repl, ch, !nostashraw);
-		} else if (ch == ',') {
-			if (level <= 0) { /* comma separator for next argument */
-				if (level)
-					lexerror("unbalanced parenthesis");
-				if (!nostashraw)
-					return ',';	/* ??? */
-			}
-			stash(repl, ch, !nostashraw);
-		} else if (ch == '\n') {
-			/* newlines are accepted as white spaces */
-			LineNumber++;
-			/*	This piece of code needs some explanation:
-				consider the call of a macro defined as:
-					#define sum(a,b) (a+b)
-				in the following form:
-					sum(
-					/_* comment *_/ #include phone_number
-					,2);
-				in which case the include must be handled
-				interpreted as such.
-			*/
-
-a_new_line:		ch = GetChar();
-			while (class(ch) == STSKIP || ch == '/') {
-			    if (ch == '/') {
-				    if ((ch = GetChar()) == '*' && !InputLevel) {
-					skipcomment();
-					stash(repl, ' ', !nostashraw);
-					ch = GetChar();
-					continue;
-				    } else {
-					UnGetChar();
-					ch = '/';
-				    }
-				    stash(repl, '/', !nostashraw);
-				    break;
-			    } else ch = GetChar();
-			}
-
-			if (ch == '#') {
-				domacro();
-				/* Clear File_Inserted since domacro could
-				 * be called again, which calls GetToken().
-				 */
-				File_Inserted = 0;
-				goto a_new_line;
-			} else if (ch == EOI) {
-				lexerror("unterminated macro call");
-				return ')';
-			}
-			if (ch != '/') {
-				UnGetChar();
-				ch = ' ';
-				stash(repl, ' ', !nostashraw);
-			}
-		} else if (ch == '/') {
-			/* comments are treated as one white space token */
-			if ((ch = GetChar()) == '*' && !InputLevel) {
-				skipcomment();
-				stash(repl, ' ', !nostashraw);
-			} else {
-				UnGetChar();
-				ch = '/';
-				stash(repl, '/', !nostashraw);
-			}
-		} else if (ch == '\'' || ch == '"') {
-			/*	Strings are considered as ONE token, thus no
-				replacement within strings.
-			*/
-			register int match = ch;
-
-			stash(repl, ch, !nostashraw);
-			while ((ch = GetChar()) != EOI) {
-				if (ch == match)
-					break;
-				if (ch == '\\') {
-					stash(repl, ch, !nostashraw);
-					ch = GetChar();
-				} else if (ch == '\n') {
-					lexerror("newline in string");
-					LineNumber++;
-					stash(repl, match, !nostashraw);
-					break;
-				}
-				stash(repl, ch, !nostashraw);
-			}
-			if (ch != match) {
-				lexerror("unterminated macro call");
-				return ')';
-			}
-			stash(repl, ch, !nostashraw);
-		} else {
-			if (lastch == TOKSEP && ch == TOKSEP) continue;
-			stash(repl, ch, !nostashraw);
-		}
-	}
-}
-
-macro_func(idef)
-	register struct idf *idef;
-{
-	/*	macro_func() performs the special actions needed with some
-		macros. These macros are __FILE__ and __LINE__ which
-		replacement texts must be evaluated at the time they are
-		used.
-	*/
-	register struct macro *mac = idef->id_macro;
-	static char FilNamBuf[PATHLENGTH];
-
-	switch (idef->id_text[2]) {
-	case 'F':			/* __FILE__	*/
-		FilNamBuf[0] = '"';
-		strcpy(&FilNamBuf[1], FileName);
-		strcat(FilNamBuf, "\"");
-		mac->mc_text = FilNamBuf;
-		mac->mc_length = strlen(FilNamBuf);
-		break;
-	case 'L':			/* __LINE__	*/
-		mac->mc_text = long2str((long)LineNumber, 10);
-		mac->mc_length = strlen(mac->mc_text);
-		break;
-	default:
-		crash("(macro_func)");
-		/*NOTREACHED*/
-	}
-}
-
-void
-macro2buffer(repl, idf, args)
-	register struct repl *repl;
-	register struct idf *idf;
-	register struct args *args;
-{
-	/*	macro2buffer expands the replacement list and places the
-		result onto the replacement buffer. It deals with the #
-		and ## operators, and inserts the actual parameters.
-		The argument buffer contains the raw argument (needed
-		for the ## operator), and the expanded argument (for
-		all other parameter substitutions).
-
-		The grammar of the replacement list is:
-
-			repl_list:	TOKEN repl_list
-				|	PARAMETER repl_list
-				|	'#' PARAMETER
-				|	TOKEN '##' TOKEN
-				|	PARAMETER '##' TOKEN
-				|	TOKEN '##' PARAMETER
-				|	PARAMETER '##' PARAMETER
-				;
-
-		As the grammar indicates, we could make a DFA and
-		use this finite state machine for the replacement
-		list parsing (inserting the arguments, etc.).
-
-		Currently we go through the replacement list in a
-		linear fashion. This is VERY expensive, something
-		smarter should be done (but even a DFA is O(|s|)).
-	*/
-	register char *ptr = idf->id_macro->mc_text;
-	int err = 0;
-	int func = idf->id_macro->mc_nps != -1;
-	char *stringify();
-
-	assert(ptr[idf->id_macro->mc_length] == '\0');
-	while (*ptr) {
-	    if (*ptr == '\'' || *ptr == '"') {
-		register int delim = *ptr;
-
-		do {
-		    add2repl(repl, *ptr);
-		    if (*ptr == '\\')
-			add2repl(repl, *++ptr);
-		    if (*ptr == '\0') {
-			lexerror("unterminated string");
-			return;
-		    }
-		    ptr++;
-		} while (*ptr != delim || *ptr == '\0');
-		add2repl(repl, *ptr++);
-	    } else if (*ptr == '#' && (func || *(ptr+1) == '#')) {
-		if (*++ptr == '#') {
-		    register int tmpindex;
-			/* ## - paste operator */
-		    ptr++;
-
-			/* trim the actual replacement list */
-		    --repl->r_ptr;
-		    while (repl->r_ptr >= repl->r_text
-			    && is_wsp(*repl->r_ptr))
-			--repl->r_ptr;
-
-		    /*	## occurred at the beginning of the replacement list.
-		     */
-		    if (repl->r_ptr < repl->r_text) {
-			err = 1;
-			break;
-		    }
-
-		    if (repl->r_ptr >= repl->r_text
-			    && *repl->r_ptr == TOKSEP)
-			--repl->r_ptr;
-
-		    ++repl->r_ptr;
-		    tmpindex = repl->r_ptr - repl->r_text;
-		    /* tmpindex can be 0 */
-
-		    /* skip space in macro replacement list */
-		    while ((*ptr & FORMALP) == 0 && is_wsp(*ptr))
-			    ptr++;
-
-		    /*	## occurred at the end of the replacement list.
-		     */
-		    if (*ptr & FORMALP) {
-			register int n = *ptr++ & 0177;
-			register char *p;
-
-			assert(n > 0);
-			p = args->a_rawvec[n-1];
-			if (p) {	/* else macro argument missing */
-			    while (is_wsp(*p)) p++;
-			    if (*p == NOEXPM) p++;
-			    while (*p)
-				add2repl(repl, *p++);
-			}
-			while (tmpindex > 0
-				&& in_idf(repl->r_text[tmpindex]))
-			    tmpindex--;
-			if (tmpindex >= 0
-			    && repl->r_text[tmpindex] == NOEXPM)
-				repl->r_text[tmpindex] = TOKSEP;
-		    } else if (*ptr == '\0') {
-			    err = 1;
-			    break;
-		    } else {
-			    if (in_idf(*ptr)) {
-				tmpindex--;
-				while (tmpindex > 0
-					&& in_idf(repl->r_text[tmpindex]))
-				    tmpindex--;
-				if (tmpindex >= 0
-				    && repl->r_text[tmpindex] == NOEXPM)
-					repl->r_text[tmpindex] = TOKSEP;
-			    }
-		    }
-		} else {			/* # operator */
-			ptr = stringify(repl, ptr, args);
-		}
-	    } else if (*ptr & FORMALP) {
-		/* insert actual parameter */
-		register int n = *ptr++ & 0177;
-		register char *p, *q;
-
-		assert(n > 0);
-
-		/*	This is VERY dirty, we look ahead for the
-			## operator. If it's found we use the raw
-			argument buffer instead of the expanded
-			one.
-		*/
-		for (p = ptr; (*p & FORMALP) == 0 && is_wsp(*p); p++)
-			/* EMPTY */;
-		if (*p == '#' && p[1] == '#')
-			q = args->a_rawvec[n-1];
-		else
-			q = args->a_expvec[n-1];
-
-		if (q)			/* else macro argument missing */
-		    while (*q)
-			add2repl(repl, *q++);
-
-		if (repl->r_text == repl->r_ptr || *(repl->r_ptr - 1) != TOKSEP)
-			add2repl(repl, TOKSEP);
-	    } else {
-		add2repl(repl, *ptr++);
-	    }
-	}
-	if (err)
-		lexerror("illegal use of the ## operator");
-}
-
-char *
-stringify(repl, ptr, args)
-	register struct repl *repl;
-	register char *ptr;
-	register struct args *args;
-{
-	/*	If a parameter is immediately preceded by a # token
-		both are replaced by a single string literal that
-		contains the spelling of the token sequence for the
-		corresponding argument.
-		Each occurrence of white space between the argument's
-		tokens become a single space character in the string
-		literal. White spaces before the first token and after
-		the last token comprising the argument are deleted.
-		To retain the original spelling we insert backslashes
-		as appropriate. We only escape backslashes if they
-		occure within string tokens.
-	*/
-	register int space = 1;		/* skip leading spaces */
-	register int delim = 0;		/* string or character constant delim */
-	register int backslash = 0;	/* last character was a \ */
-
-	/* skip spaces macro replacement list */
-	while ((*ptr & FORMALP) == 0 && is_wsp(*ptr))
-		ptr++;
-
-	if (*ptr & FORMALP) {
-		register int n = *ptr++ & 0177;
-		register char *p;
-
-		assert(n != 0);
-		p = args->a_rawvec[n-1];
-		add2repl(repl, '"');
-		while (*p) {
-			if (is_wsp(*p)) {
-				if (!space) {
-					space = 1;
-					add2repl(repl, ' ');
-				}
-				p++;
-				continue;
-			}
-			space = 0;
-
-			if (!delim && (*p == '"' || *p == '\''))
-				delim = *p;
-			else if (*p == delim && !backslash)
-				delim = 0;
-			backslash = *p == '\\';
-			if (*p == '"' || (delim && *p == '\\'))
-				add2repl(repl, '\\');
-			if (*p == TOKSEP || *p == NOEXPM) p++;
-			else add2repl(repl, *p++);
-		}
-
-		/* trim spaces in the replacement list */
-		for (--repl->r_ptr; is_wsp(*repl->r_ptr); repl->r_ptr--)
-			/* EMPTY */;
-		++repl->r_ptr;		/* oops, one to far */
-		add2repl(repl, '"');
-	} else
-		error("illegal use of # operator");
-	return ptr;
-}
-
-/* The following routine is also called from domacro.c.
- */
-add2repl(repl, ch)
-	register struct repl *repl;
-	int ch;
-{
-	register int index = repl->r_ptr - repl->r_text;
-
-	assert(index < repl->r_size);
-	if (index + 2 >= repl->r_size) {
-		repl->r_text = Realloc(repl->r_text, (unsigned) (repl->r_size <<= 1));
-		repl->r_ptr = repl->r_text + index;
-	}
-	*repl->r_ptr++ = ch;
-	*repl->r_ptr = '\0';
-}
-
-/* If the variable stashraw is negative, we must only stash into the raw
- * buffer. If the variable is zero, we must only stash into the expanded
- * buffer. Otherwise, we must use both buffers.
- */
-stash(repl, ch, stashraw)
-	struct repl *repl;
-	register int ch;
-	int stashraw;
-{
-	/*	Stash characters into the macro expansion buffer.
-	*/
-	register struct args *args = repl->r_args;
-	register int index = args->a_expptr - args->a_expbuf;
-
-	if (stashraw >= 0) {
-		assert(index < args->a_expsize);
-		if (index + 1 >= args->a_expsize) {
-			args->a_expbuf = Realloc(args->a_expbuf,
-						    (unsigned) (args->a_expsize <<= 1));
-			args->a_expptr = args->a_expbuf + index;
-		}
-		*args->a_expptr++ = ch;
-	}
-
-	if (stashraw) {
-		index = args->a_rawptr - args->a_rawbuf;
-		assert(index < args->a_rawsize);
-		if (index + 1 >= args->a_rawsize) {
-			args->a_rawbuf = Realloc(args->a_rawbuf,
-						    (unsigned)(args->a_rawsize <<= 1));
-			args->a_rawptr = args->a_rawbuf + index;
-		}
-		*args->a_rawptr++ = ch;
-	}
-}
-#endif /* NOPP */
diff --git a/lang/cem/cemcom.ansi/replace.str b/lang/cem/cemcom.ansi/replace.str
deleted file mode 100644
index d936fe31d..000000000
--- a/lang/cem/cemcom.ansi/replace.str
+++ /dev/null
@@ -1,51 +0,0 @@
-/*
- * (c) copyright 1987 by the Vrije Universiteit, Amsterdam, The Netherlands.
- * See the copyright notice in the ACK home directory, in the file "Copyright".
- */
-/* $Id$ */
-/*	DEFINITIONS FOR THE MACRO REPLACEMENT ROUTINES		*/
-
-struct repl {
-	struct	repl *next;
-	struct	idf *r_idf;		/* name of the macro */
-	struct	args *r_args;		/* replacement parameters */
-	int	r_level;		/* level of insertion */
-	int	r_size;			/* current size of replacement buffer */
-	char	*r_ptr;			/* replacement text index pointer */
-	char	*r_text;		/* replacement text */
-};
-
-/* ALLOCDEF "repl" 4 */
-
-#define NO_REPL		(struct repl *)0
-
-/*	The implementation of the ## operator is currently very clumsy.
-	When the the ## operator is used the arguments are taken from
-	the raw buffer; this buffer contains a precise copy of the
-	original argument. The fully expanded copy is in the arg buffer.
-	The two copies are here explicitely because:
-
-		#define ABC	f()
-		#define	ABCD	2
-		#define	g(x, y)	x ## y + h(x)
-
-		g(ABC, D);		// gives: 2 + h(f()) 
-
-	In this case we need two copies: one raw copy for the pasting
-	operator, and an expanded one as argument for h().
-*/
-struct args {
-	char	*a_expptr;		/* expanded argument index pointer */
-	char	*a_expbuf;		/* expanded argument buffer pointer */
-	int	a_expsize;		/* current size of expanded buffer */
-	char	*a_expvec[NPARAMS];	/* expanded argument vector */
-	char	*a_rawptr;		/* raw argument index pointer */
-	char	*a_rawbuf;		/* raw argument buffer pointer */
-	int	a_rawsize;		/* current size of raw buffer */
-	char	*a_rawvec[NPARAMS];	/* raw argument vector */
-};
-
-/* ALLOCDEF "args" 2 */
-
-#define NO_ARGS		(struct args *)0
-
diff --git a/lang/cem/cemcom.ansi/skip.c b/lang/cem/cemcom.ansi/skip.c
index ac10e5889..b617f08e9 100644
--- a/lang/cem/cemcom.ansi/skip.c
+++ b/lang/cem/cemcom.ansi/skip.c
@@ -11,125 +11,17 @@
 #include "class.h"
 #include "input.h"
 
-#ifndef NOPP
-extern int InputLevel;
-
-int skipspaces(ch, skipnl) register int ch;
-{
-	/*	skipspaces() skips any white space and returns the first
-	    non-space character.
-	*/
-	register int nlseen = 0;
-
-	for (;;)
-	{
-		while (class(ch) == STSKIP)
-			ch = GetChar();
-		if (skipnl && class(ch) == STNL)
-		{
-			ch = GetChar();
-			LineNumber++;
-			nlseen++;
-			continue;
-		}
-		if (ch == TOKSEP && InputLevel)
-		{
-			ch = GetChar();
-			continue;
-		}
-
-		/* \\\n are handled by trigraph */
-
-		if (ch == '/')
-		{
-			ch = GetChar();
-			if (ch == '*' && !InputLevel)
-			{
-				skipcomment();
-				ch = GetChar();
-			}
-			else if (ch == '/' && !InputLevel)
-			{
-				skiplinecomment();
-				ch = GetChar();
-			}
-			else
-			{
-				UnGetChar();
-				return '/';
-			}
-		}
-		else if (nlseen && ch == '#')
-		{
-			domacro();
-			ch = GetChar();
-		}
-		else
-			return ch;
-	}
-}
-#endif /* NOPP */
 
 SkipToNewLine()
 {
 	register int ch;
 	register int garbage = 0;
-#ifndef NOPP
-	register int delim = 0;
-#endif
 
 	while ((ch = GetChar()) != '\n')
 	{
-#ifndef NOPP
-		if (delim)
-		{
-			if (ch == '\\')
-			{
-				if (GetChar() == '\n')
-					break;
-			}
-			else if (ch == delim)
-			{
-				delim = 0;
-			}
-			continue;
-		}
-		else if (ch == '\'' || ch == '\"')
-		{
-			delim = ch;
-			garbage = 1;
-		}
-		else if (ch == '/')
-		{
-			if (!InputLevel)
-			{
-				int nch = GetChar();
-				if (nch == '*')
-				{
-					skipcomment();
-					continue;
-				}
-				else if (nch == '/')
-				{
-					skiplinecomment();
-					continue;
-				}
-				else
-					UnGetChar();
-			}
-		}
-		else if (ch == TOKSEP && InputLevel)
-		{
-			continue;
-		}
-#endif
 		if (!is_wsp(ch))
 			garbage = 1;
 	}
-#ifndef NOPP
-	if (delim)
-		strict("unclosed opening %c", delim);
-#endif
 	++LineNumber;
 	return garbage;
 }