some fixes, f.i. process # in actual parameter list

util/cpp/preprocess.c

@@ -81,6 +81,7 @@ preprocess(fn)
 		for (;;) {
 			if (c & 0200)  {
 				if (c == EOI) {
+					newline();
 					flush(op-_obuf);
 					return;
 				}
@@ -102,6 +103,7 @@ preprocess(fn)
 							echo(c);
 						}
 						else if (c == EOI) {
+							newline();
 							flush(op - _obuf);
 							return;
 						}
@@ -149,6 +151,7 @@ preprocess(fn)
 						break;
 					}
 					else if (c == EOI) {
+						newline();
 						flush(op-_obuf);
 						return;
 					}
@@ -161,8 +164,7 @@ preprocess(fn)
 						}
 						else if (c == '\'') escaped = 1;
 					}
-				}
+				} while (escaped || c != stopc);
-				while (escaped || c != stopc);
 				echo(c);
 				if (c == '\n')
 					break;	/* Don't eat # */

util/cpp/replace.c

@@ -67,7 +67,7 @@ replace(idef)
 		LoadChar(c);
 		c = skipspaces(c,1);
 		if (c != '(') {		/* no replacement if no ()	*/
-			error("macro %s needs arguments",
+			warning("macro %s needs arguments",
 				idef->id_text);
 			PushBack();
 			return 0;

util/cpp/skip.c

@@ -16,12 +16,17 @@ skipspaces(ch, skipnl)
 	/*	skipspaces() skips any white space and returns the first
 		non-space character.
 	*/
+	register int nlseen = 0;
+
 	for (;;) {
-		while (class(ch) == STSKIP)
+		while (class(ch) == STSKIP) {
+			nlseen = 0;
 			LoadChar(ch);
+		}
 		if (skipnl && class(ch) == STNL) {
 			LoadChar(ch);
 			++LineNumber;
+			nlseen++;
 			continue;
 		}
 		/* How about "\\\n"?????????	*/
@@ -36,7 +41,13 @@ skipspaces(ch, skipnl)
 				return '/';
 			}
 		}
-		else
+		else if (nlseen && ch == '#') {
+			domacro();
+			LoadChar(ch);
+			/* ch is the first character of a line. This means
+			 * that nlseen will still be true.
+			 */
+		} else
 			return ch;
 	}
 }