.\" $Header$ .if n .nr PD 1v .if n .nr LL 78m .if n .ll 78m .TL Amsterdam Compiler Kit Installation Guide .AU Ed Keizer (revised for 3rd and 4th distribution by Ceriel Jacobs) .AI Vakgroep Informatica Vrije Universiteit Amsterdam .NH Introduction .PP This document describes the process of installing Amsterdam Compiler Kit. It depends on your combination of hard- and software how hard it will be to install the Kit. This description is intended for a VAX running BSD 4.1 .UX \. Installation on VAX BSD4.2/4.3 systems, Sun-2 or Sun-3 systems running Release 3.0 or newer, and some System V systems should be easy. Installation on PDP 11's running .UX Version 7, BSD 2.8, or 2.9 should also be easy, as long as they have separate instruction and data space. Installation on machine's without this feature, like PDP 11/34, PDP 11/60 requires extensive surgery on some programs and is thought of as impossible. See section 7 for installation on other systems. .PP On small machines, like the PDP-11, the Modula-2 front-end is only available for 2 byte integer, 2 byte pointer machines, so you can not cross-compile Modula-2 programs for f.i. a MC68000, on a PDP-11. .NH Restoring tree .PP The process of installing Amsterdam Compiler Kit is quite simple. It is important that the original Amsterdam Compiler Kit distribution tree structure is restored. Proceed as follows .IP " \-" 10 Create a directory, for example /usr/em, on a device with at least 25 Megabytes left. .IP " \-" Change to that directory (cd ...); it will be the working directory. .IP " \-" Extract all files from the distribution medium, for instance magtape: \fBtar x\fP. .IP " \-" Keep a copy of the original distribution to be able to repeat the process of installation in case of disasters. This copy is also useful as a reference point for diff-listings. .LP .bp The directories in the tree contain the following information: .sp 1 .nr PD 0 .IP "bin" 14 .br the few utilities that knot things together. See the section about "Commands". .IP "lib" .br root of a tree containing almost all binaries and libraries used by commands. All files specific to a certain machine are collected in one subtree per machine. E.g. "lib/pdp", "lib/z8000". The names used here are the same names as used for subtrees of "mach". .IP "lib/descr" .br Command descriptor files used by the program ack. .IP "lib/LLgen" .br Files used by the LL(1) Parser-generator. .br .IP "lib/ego" .br Files used by the global optimizer. .br .IP "etc" .br The main description of EM sits here. Files (e.g. em_table) describing the opcodes and pseudos in use, the operands allowed, effect in stack etc. etc. Make in this directory creates most of the files in "h" and "util/data". This make should only be called when the EM definition is changed. .IP "include/_tail_cc" .br Include files needed by modules in the C library from lang/cem/libcc. Especially needed for "stdio". .IP "include/_tail_mon" .br More or less system independent include files needed by modules in the library lang/cem/libcc/mon. .IP "h" .br The #include files for: .TS l l. arch.h Definition of the ACK archive format. as_spec.h Used by EM assembler and interpreters. bc_io.h Used by the Basic run-time system. bc_string.h Used by the Basic run-time system. cg_pattern.h Used by the backend program "cg" and its bootstrap. cgg_cg.h Used by the backend program "ncg" and its bootstrap. em_abs.h Contains trap numbers and address for lin and fil em_flag.h Definition of bits in array em_flag in lib/em_data.a Describes parameters effect on flow of instructions em_mes.h Definition of names for mes pseudo numbers em_mnem.h instruction => compact mapping. em_path.h Pathnames used by \fIack\fP, intended for all utilities em_pseu.h pseudo instruction => compact mapping em_ptyp.h Useful for compact code reading/writing, defines classes of parameters em_reg.h Definition of mnemonics indicating register type. em_spec.h Definition of constants used in compact code local.h Various definitions for local versions pc_err.h Definitions of error numbers in Pascal pc_file.h Macro's used in file handling in Pascal pc_size.h Sizes of objects used by Pascal compiler and run-time system. em_reg.h Definition of names for register types. ocm_chan.h Used by the occam run-time system ocm_parco.h Used by the occam run-time system ocm_proc.h Used by the occam run-time system m2_traps.h Used by the Modula-2 run-time system .TE .IP "modules" .br root of a tree containing modules for compiler writers. .IP "modules/man" .br manual pages for all modules. .IP "modules/lib" .br contains module objects. .IP "modules/src" .br contains sources of the modules, each module in its own directory. .IP "modules/h" .br include files for some of the modules. .IP "modules/pkg" .br include files for some of the modules. .IP "doc" .br This directory contains the unformatted documents for the Kit. A list of the available documents can be found in the last section. .IP "doc/em" .br The EM-manual IR-81. .IP "doc/em/int" .br The EM interpreter written in Pascal. .IP "mkun" .br The PUBMAC macro package for nroff/troff from the Katholieke Universiteit at Nijmegen. It is used for the EM reference manual. The Makefile installs the macro package in /usr/lib/tmac. This package is in the public domain. .IP "mach" .br just there to group the directories with all sources for each machine. The section about "Machines" of this manual indicates which subdirectories are used for which systems. .br These directories have subdirectories named: .in +3n .TS l l. cg the backend (*.m => *.s) ncg the new backend (*.m => *.s) as the assembler (*.s => *.o) or assembler/linker (*.s + libraries => a.out) cv Conversion programs for a.out files. dl Down-load programs top the target optimizer libem Sources for EM runtime system, only depending on CPU type libbc Used to create Basic run-time system and libraries libcc Used to create C run-time system and libraries libpc Used to create Pascal run-time system and libraries liboc Used to create Occam run-time system and libraries libm2 Used to create Modula-2 run-time system and libraries libfp Used to create floating point library libsys Sources for system-dependent EM library test Various tests int Source for an interpreter .TE .in -3n The directory proto contains files used by most machines, like machine-independent sources and Makefiles. .in +3n .TS l l. mach/proto/cg Current backend sources. mach/proto/ncg New backend sources. mach/proto/as Assembler sources. mach/proto/top Target optimizer sources. mach/proto/fp FLoating point package sources. mach/proto/libg Makefile for compiling libraries. .TE .IP "emtest" .br Contains prototype of em test set. .IP "man" .br Man files for various utilities .IP "lang" .br Just there to group the directories for all front-ends .IP "lang/pc" .br Pascal front-end .IP "lang/pc/libpc" .br Source of Pascal run-time system (in EM or C) .IP "lang/pc/test" .br Some test programs written in Pascal .IP "lang/pc/pem" .br The Pascal compiler proper .IP "lang/cem" .br C front-end .IP "lang/cem/libcc" .br Directories with sources of C runtime system, libraries (in EM or C) .IP "lang/cem/libcc/gen" .br Sources for routines in chapter III of UNIX programmers manual, excluding Stdio .IP "lang/cem/libcc/stdio" .br Stdio sources .IP "lang/cem/libcc/math" .br Sources for mathematical routines, normally available with the \fB-lm\fP option to \fIcc\fP. .IP "lang/cem/libcc/mon" .br Sources for routines in chapter II, written in EM .IP "lang/cem/cemcom" .br The compiler proper .IP "lang/cem/ctest" .br C test set .IP "lang/cem/ctest/cterr" .br Programs developed for pinpointing previous errors .IP "lang/cem/ctest/ct*" .br The test programs. .IP "lang/basic/src" .br The compiler proper. .IP "lang/basic/lib" .br Basic run-time library source. .IP "lang/basic/test" .br Various Basic programs. .IP "lang/occam" .br Occam front-end. .IP "lang/occam/comp" .br The compiler proper. .IP "lang/occam/lib" .br Source of Occam run-time system (in EM or C). .IP "lang/occam/test" .br Some Occam programs. .IP "lang/m2" .br Modual-2 front-end. .IP "lang/m2/comp" .br The compiler proper. .IP "lang/m2/libm2" .br Source of Modula-2 run-time system (in EM, C and Modula-2). .IP "lang/m2/m2mm" .br Modula-2 makefile generator. .IP "lang/m2/test" .br Some Modula-2 example programs. .IP "util" .br Contains directories with sources for various utilities .IP "util/ack" .br The program used for translation with the Kit. .IP "util/opt" .br EM peephole optimizer (*.k => *.m). .IP "util/ego" .br The global optimizer. .IP "util/topgen" .br The target optimizer generator.. .IP "util/misc" .br Decode (*.[km] => *.e) + encode (*.e => *.k). .IP "util/data" .br The C-code for `lib/em_data.a`. These sources are created by the Makefile in `etc`. .IP "util/ass" .br The EM assembler (*.[km] + libraries => e.out). .IP "util/arch" .br The archivers to be used for ALL EM utilities. .IP "util/cgg" .br A program needed for compiling backends. .IP "util/ncgg" .br A program needed for compiling the newest backends. .IP "util/cpp" .br The C preprocessor. .IP "util/shf" .br Various shell files. .IP "util/LLgen" .br The extended LL(1) parser generator. .IP "util/amisc" .br Contains some programs handling ACK a.out format, such as anm, asize. .IP "util/cmisc" .br Contains some programs to help in resolving name conflicts, and a dependency generator for makefiles. .IP "util/led" .br The ACK link-editor, reading ACK relocatable a.out format, and writing ACK a.out format. .IP "util/int" .br An EM interpreter, written in C. Very useful for checking out software. Unfortunately not available for small machines. .ne 4 .LP All pathnames mentioned in the text of this document are relative to the ACK home directory, unless they start with '/'. .sp 1 .NH Adapting ACK to your system .PP Before compiling the sources in the Kit some installation dependent actions have to be taken. Most of these are performed by an interactive shell script in the file .I first in a directory of the same name. .LP These actions are: .sp 1 .IP \- Automatically checking whether you included the ACK bin directory in your shell PATH. See also the section on "commands". .IP \- Automatically setting the pathname of the parent directory in ../h/em_path.h. See also the section on "pathnames". .IP \- Discovering how to call .I cc to get it to include the .I lex library. .IP \- Asking you for the type of system you have and creating the shell script "ack_sys" in the Kit's bin directory. Several utilities make use of "ack_sys" to determine the type of system you have. The current choice is between: .sp 1 .TS c c c l l l. answer system type default machine pdp_v7 PDP11 with sep I/D and version 7 pdp vax_bsd4_1a VAX11 with BSD4.1a vax4 vax_bsd4_2 VAX11 with BSD4.2 vax4 vax_sysV_2 VAX11 with System V.2 vax4 pc_ix IBM PC with PC/IX i86 xenix3 IBM AT with Microsoft Xenix V3.2 xenix3 m68_unisoft Motorola 68000 with Unisoft UNIX m68k2 m68_pmds Philips PMDS pmds m68_sysV_0 68000 with Uniplus UNIX System V.0 mantra sun3 Sun 3 Motorola 68020 workstation sun3 sun2 Sun 2 Motorola 68010 workstation sun2 SMALL Neither of the above, small address space i86 ANY Neither of the above m68k2 .TE .sp 1 For some of these, the installation procedure has not been tested, as we don't have them. For others, the installation procedure has only been tested with earlier distributions, as we don't have those systems anymore. However, the pdp_v7, vax_bsd4_1a, sun3 and m68 systems are known to behave reasonably. The Sun systems should run Release 3.0 or newer. For ANY you can use any name you fancy, but the Kit will not be able to compile programs for your system. If you want to do that you have to read the section about "compilation on a different machine". .IP \- Automatically setting the default machine for which code is produced to your own type of system according to the table above. This in done in the file "h/local.h". See also the section 8.2. .IP \- Automatically editing a few description files that tell ACK to use your system's assembler. On the VAX the Kit uses the native assembler and linker. The description file lib/vax4/descr has to be altered to prevent attempts to assemble programs with unsuitable assemblers. The original descr file is copied to descr.orig. .IP \- The VAX backend cannot be booted on systems with a 16-bit address space systems. The program lib/cgg needs more memory than available to transform the table into files suitable for the C-compiler. Therefore files tables1.h and tables1.c have been provided in the directory mach/vax4/cg. These must be copied to tables.h and tables.c to get working code-generators for the VAX on PDP11's. You will hardly be able to use these, because the code generated by these programs cannot be assembled and loaded without a native VAX assembler, but its nice to be able to look at the code produced. The same problem occurs for the m68k2 backend and the m68020 backend, and the same solution is chosen. .IP \- On machines with a 16-bit address space, the C-compiler has no builtin preprocessor. Arangements are made to this effect. .IP \- On the PDP, .I ranlib is not used, because it does not work properly, at least, on our 2.9 BSD system it does'nt. This is done by creating a dummy shell script .I ranlib in the ACK bin directory. If you are sure that your .I ranlib does work properly, you can just remove the shell script before installing the Kit. .LP .sp 1 Some actions still have to be done by hand. .sp 1 .IP \- The installation of the PUBMAC macro package is not done automatically because you need super-user privileges to do that on most systems. This macro package is used with several of the documents provided in the Kit. .IP \- UNIX V7 as originally distributed contains a few bugs that prevent correct execution of some of the larger programs. See the section named "Fixes for the UNIX V7 system" about what to do. Berkeley 2.8 or 2.9 may also have some of these bugs. .IP \- The manual files for the Kit can be copied to their appropriate place in the system by giving the command "make install" in the man directory, but only .B after running the installation of the Kit itself. .NH Compiling the Kit .PP The next step in the installation process is to compile the sources in the Kit and install them in their places in the lib and bin directories. .PP Most directories containing sources have Makefiles used to compile and install the programs in that directory. All programs needed for compilation and/or cross compilation with the Kit are installed in the directories "bin" and "lib" by these Makefiles. These Makefiles adhere to a standard which is described in the section 9. .LP You do not have to start all these Makefiles separately. We wrote a shell script calling the make's needed to install the whole Kit. This script consists of the file TakeAction in the Kit's root directory and a few files called Action in some directories. The Action files describe in a very simple form which actions have to be performed in which directories. The default action is to start "make install && make clean". The output of each make is diverted to a file called "Out" in the same directory as the make was started in. If the make was successful (return code 0) the Out file is removed and the script TakeAction produces a small message telling you that it succeeded in fulfilling its goal. If the make was not successful (any other return code) the Out file is left alone for further examination and a small message telling you to look at that file is produced by TakeAction. .LP For some programs the scripts already know they can't be installed on your type of system. In that case they produce a message "Sorry, ....." and happily proceed with further installation commands. .PP Compilation of the whole Kit might take anything from a few hours to more than a day. If you do not want to install libraries etc. for a particular machine you can edit the file Action and remove the relevant entries. .PP If this compilation went reasonably successful you should be able to use the Kit. Read the next section and the manuals provided with the Kit (in the man directory) on how to use it. .NH 2 Problems you may meet .NH 3 on Unisoft m68000 systems. .PP The Unisoft C compiler has a bug which impedes the correct translation of the peephole optimizer. For a more detailed description of this phenomenen see the file "mach/m68k2/Unisoft_bug". .NH 3 with backends .PP The backends for the PDP11, VAX with BSD4.1, Motorola 68000 and Intel 8086 have been heavily used by ourselves and are well tested. The backends for the other machines are known to run our own test programs, but might reveal errors when more heavily used. .NH 2 An example output of TakeAction. .PP .DS System definition -- done EM definition -- done LL(1) Parser generator -- done EM definition library -- done C utilities -- done system-call interface module -- done string routines module -- done formatted print module -- done assertion module -- done memory allocation module -- done fast, linear time malloc -- done EM messages generation module -- done identifier table module -- done input module -- done ACK-object reading and writing module -- done EM-code reading module -- done EM code generation module -- done Modules -- done C preprocessor -- done ACK object utilities -- done Encode/Decode -- done Shell files in bin -- done EM assembler -- done EM Peephole optimizer -- done . . . EM Global optimizer -- done ACK archiver -- done Program 'ack' -- done Bootstrap for backend tables -- done Bootstrap for newest form of backend tables -- done LED link editor -- done TOPGEN target optimizer generator -- done C frontend -- done Basic frontend -- done Occam frontend -- done Intel 8086 assembler -- done Intel 8086 backend -- done Intel 8086 C libraries -- done Intel 8086 EM library -- done Intel 8086 Pascal library -- done Intel 8086 PC/IX systemcall library -- done Intel 8086 Basic library -- done Intel 8086 Occam library -- done Intel 8086 conversion program from ack.out --> PC/IX a.out -- done Intel 8086 support -- done . . . Motorola 68000 assembler -- done Motorola 68000 2-4 backend -- done Motorola 68000 2-4 conversion program -- done Motorola 68000 target optimizer -- done Motorola 68000 2-4 C libraries -- done Motorola 68000 2-4 EM library -- done Motorola 68000 2-4 Pascal library -- done Motorola 68000 2-4 System library -- done Motorola 68000 2-4 Basic library -- done Motorola 68000 2-4 Occam library -- done Sorry, Motorola 68000 interpreters can only be made on m68* systems Motorola 68000 2-4 support -- done . . . PDP 11 assembler -- done PDP 11 backend -- done PDP 11 target optimizer -- done Sorry, PDP 11 interpreter can only be made on pdp* systems Sorry, PDP 11 C libraries can only be made on pdp* systems Sorry, PDP 11 EM library can only be made on pdp* systems Sorry, PDP 11 systemcall library can only be made on pdp* systems Sorry, PDP 11 Pascal library can only be made on pdp* systems Sorry, PDP 11 Basic library can only be made on pdp* systems Sorry, PDP 11 Occam library can only be made on pdp* systems PDP 11 support -- done . . . Vax 4-4 backend -- done Sorry, Vax 4-4 C libraries can only be made on vax* systems Sorry, Vax 4-4 EM library can only be made on vax* systems Sorry, Vax 4-4 Occam library can only be made on vax* systems Sorry, Vax 4-4 Basic library can only be made on vax* systems Sorry, Vax 4-4 systemcall interface can only be made on vax* systems Vax target optimizer -- done Vax 4-4 support -- done M68020 assembler -- done M68020 backend -- done M68020 EM library -- done M68020 system call library -- done M68020 C libraries -- done M68020 PC library -- done M68020 Basic library -- done M68020 Occam library -- done Sorry, M68020 VME131 System V/68 R2V2.1 conversion can only be made on m68020 systems M68020 System V/68 support -- done Ack.out --> Sun 3 M68020 a.out format conversion program -- done Sun 3 M68020 systemcall library -- done Sun 3 M68020 C libraries -- done Sun 3 M68020 support -- done Ack.out --> Sun 2 M68000 a.out format conversion program -- done Sun 2 M68000 systemcall library -- done Sun 2 M68000 C libraries -- done Sun 2 M68000 support -- done . . . Failed for Pascal frontend, see lang/pc/pem/Out .DE .PP The lines starting with "Sorry, " tell you that certain programs cannot be translated on your machine. The lines starting with "Failed for" tell you that certain programs/libraries which were expected to, but did not compile. Only the Pascal frontend failed to compile in this example. If you want to repeat a certain part of the installation, look in the Action file for the directory in which that part is to be found. If that directory contains an Action file issue the command "sh EM_DIR/TakeAction", otherwise type "make install". .NH Commands .PP The following commands are available in the bin directory after compilation of the Kit: .sp 1 .IP "\fIack\fP, \fIacc\fP, \fIabc\fP, \fIapc\fP, \fIocm\fP, \fIm2\fP and their links" .br The names mentioned here can be used to compile Pascal, C, etc... programs. Most of the links can be used to generate code for a particular machine. See also the section about "Machines". .IP \fIarch\fP .br The archiver used for the EM- and universal assembler/loader. .IP \fIaal\fP .br The archiver used for ACK objects. .IP \fIem\fP .br This program selects a interpreter to execute an e.out file. Interpreters exist for PDP-11 and Motorola 68000 systems. .IP \fIeminform\fP .br The program to unravel the post-mortem information of the EM interpretator for the PDP-11. .IP \fILLgen\fP .br The LL(1) parser generator. .IP \fIack_sys\fP .br A shell script producing an identification of your system. Used by some utilities to determine what is, and what is not feasible on your system. (Like translating PDP assembly). .IP \fImarch\fP .br A shell script used while compiling libraries. .IP "\fIasize\fP, \fIanm\fP, \fIastrip\fP" .br Do the same as \fIsize\fP, \fInm\fP and \fIstrip\fP, but for ACK object format. .IP \fImkdep\fP .br A dependency generator for makefiles. .IP "\fIcid\fP, \fIprid\fP, \fIcclash\fP" .br Some utilities for handling name clashes in C programs. Some systems have C-compilers with only 7 or 8 characters significant in identifiers. .IP \fIint\fP .br An EM interpreter. This one is written in C, and is very useful for checking out programs. .sp 1 .LP We currently make the Kit available to our users by telling them that they should include the bin directory of the Kit in their PATH shell variable. The programs will still work when moved to a different directory or linked to. Copying should preferably be done with tar, since links are heavily used. Renaming of the programs linked to \fIack\fP will not always produce the desired result. This program uses its call name as an argument. Any call name not being \fIcc\fP, \fIacc\fP, \fIabc\fP, \fIpc\fP, \fIocm\fP, \fIm2\fP, or \fIapc\fP will be interpreted as the name of a 'machine description' and the program will try to find a description file with that name. The installation process will only touch the utilities in the Kit's bin directory, not your own copies. .NH Machines .PP Underneath you will find a table with entries for all commands in the bin directory used to (cross)compile for a particular machine. The name in the first column give the name in the bin directory. The column headed dir indicates which subdirectories of lib are needed for compilation. The column head i/p contains the integer and pointer size used in units of bytes. The subdirectories with the same name in mach contain the sources. A * in the column headed 'fp' indicates that floating point can be used for that particular machine. A + in that column indicates that floating point is only available under the '-fp' option. In this case, software floating point emulation is used. .TS c c c c c c c l l l l l l l. command system i/p languages fp dir remarks pdp PDP/UNIX V7 2/2 C * pdp needs sep. I/D Pascal No assembler Basic Occam Modula-2 vax4 VAX/BSD 4.? 4/4 C * vax4 No assembler System V.2 Pascal Basic Occam Modula-2 m68k2 M68000/Unisoft 2/4 C + m68k2 Pascal Basic Occam Modula-2 m68k4 M68000/Unisoft 4/4 C + m68k4 Pascal m68k2 Basic Occam Modula-2 pmds M68000/PMDS 2/4 C + pmds Philips Micro Pascal m68k2 Devel. System Basic Occam Modula-2 pmds4 M68000/PMDS 4/4 C + pmds4 Philips Micro Pascal m68k2 Devel. System Basic m68k4 Occam Modula-2 mantra M68000/SysV.0 4/4 C + mantra Pascal m68k2 Basic m68k4 Occam Modula-2 m68020 M68020/V/68 4/4 C + m68020 R2V2.1 Pascal Basic Occam Modula-2 sun3 SUN 3 R3.0 4/4 C + sun3 Pascal m68020 Basic Occam Modula-2 sun2 SUN 2 R3.0 4/4 C + sun2 Pascal m68k4 Basic m68k2 Occam Modula-2 i86 IBM PC/IX 2/2 C + i86 IBM PC with PC/IX Pascal Causes kernel crashes Basic Occam Modula-2 xenix3 Microsoft Xenix V3 2/2 C + xenix3 IBM AT with Xenix Pascal i86 Basic Occam Modula-2 minix Minix PC 2/2 C + minix IBM PC running Minix Pascal i86 Basic Occam Modula-2 minixST ST Minix 2/4 C + minixST Atari ST running Minix Pascal m68k2 Basic Occam Modula-2 z8000 Zilog 8000 2/2 C z8000 Central Data Pascal CPU board Basic Uses assembler/loader Occam Modula-2 em22 EM machine 2/2 C * em22 Needs interpreter Pascal Basic Occam Modula-2 em24 EM machine 2/4 C * em24 Needs interpreter Pascal Basic Occam Modula-2 em44 EM machine 4/4 C * em44 Needs interpreter Pascal Basic Occam Modula-2 6500 6502/BBC 2/2 C 6500 Uses assembler/loader Pascal Basic Occam Modula-2 6800 Bare 6800 6800 Assembler only 6805 Bare 6805 6805 Assembler only 6809 Bare 6809 6809 Assembler only ns Bare NS16032 4/4 C ns Pascal Basic Occam Modula-2 i80 Hermac/z80 2/2 C i80 Pascal Basic Occam Modula-2 z80 Hermac/z80 2/2 C z80 \fIi80\fP is faster Pascal Basic Occam Modula-2 s2650 Signetics 2650 s2650 Assembler only .TE .PP The commands \fBem22\fP, \fBem24\fP and \fBem44\fP produce e.out files with EM machine code which must be interpreted. The Kit contains three interpreters: one running under PDP 11/V7 UNIX, one for the M68000, running under the PMDS system, SUN systems, the Mantra system, etc, and one, written in C and running on large machines. The first one can only interpret 2/2 e.out files, the second takes 2/4 and 4/4 files, and the last one takes 2/2, 2/4 and 4/4. The PDP 11 interpreter executes floating point instructions. The interpreter for the M68000 traps if you try to use floating point. .LP The program \fBem\fP in the bin directory calls the appropriate interpreter. The interpreters are sought in the em22, em24 and em44 subdirectories of lib. The third interpreter is available on large machines as the program \fIint\fP in the bin directory. .NH Compilation on a different machine. .PP The Kit be installed and used as a cross-compiler for C and Basic programs on any UNIX machine. The presence of most UNIX utilities is essential for compilation. A few of the programs you certainly need are: C-compiler, Yacc, sed, make and lex. Except for the Pascal compiler proper all programs can be translated on a normal UNIX system, like V7, BSD4.1. .NH 2 Backend .PP The existence of a backend with a system call library for your system is essential if you wish to produce executable files for that system. Rewriting the system call library if the one supplied does not work on your system is fairly straightforward. If no backend exists for your CPU type you have to write one yourself which is a major undertaking. .NH 2 Pascal .PP When you can produce executable code it is also possible to boot the Pascal Compiler, which is written in Pascal itself. The Kit contains the compact code files for the 2/2, 4/4 and 2/4 versions of the Pascal compiler. The Makefile automatically tries to boot the Pascal compiler from one of these compact code files, if the compiler proves unable to compile itself. .NH 2 Universal assembler/loader, link editor .PP The native assemblers and loaders are used on PDP-11 and VAX. The description files in lib/*/descr for other systems use our universal assembler and for most machines our link editor. The load file produced is not directly usable in any system known to us, but has to be converted before it can be put to use. The \fIcv\fP programs convert our a.out format into executable files. The \fIdl\fP programs present for some machines unravel our a.out files and transmit commands to load memory to a microprocessor over a serial line. The file man/ack.out.5 contains a description of the format of the universal assembler load file. It might be useful to those who wish or need to write their own conversion programs. Also, a module is included to read and write our a.out format. See modules/man/object.3. .NH 2 Compiling libraries .PP The Kit contains sources for part II and III of the C-library. These files can be used to make libraries for the Ack C-compiler. The recompilation process uses a few include files. The include directory in the EM home directory contains the include files it needs. An effort has been made to make the part III stuff as system independent as possible. .NH Options .NH 2 Default machine .PP There is one important option in h/local.h. The utility \fIack\fP uses a default machine name when called as \fIacc\fP, \fIcc\fP, \fIabc\fP, \fIapc\fP, \fIpc\fP, \fIocm\fP, \fIm2\fP, or \fIack\fP. The machine name used for default is determined by the definition of ACKM in h/local.h. The Kit is distributed with "vax4" as the default machine, but the shell script "first" in the directory "first" alters this to suit your own system. There is nothing against using the Kit as a cross-compiler and by default produce code that can't run on your own system. But...., you have to alter the Makefile for the Pascal frontend in that case. That Makefile assumes that calling \fBapc\fP and \fBacc\fP will produce a.out's that can run on your own system. Change the definitions of ACC and APC in that Makefile according to your needs. .NH 2 Pathnames .PP Absolute pathnames are concentrated in "h/em_path.h". Only the Pascal runtime system and the utilities \fIack\fP and \fILLgen\fP use absolute pathnames to access files in the Kit. The tree is distributed with /usr/em as the working directory. The definition of EM_DIR in em_path.h should be altered to specify the root directory for the Compiler Kit distribution on your system. This is done automatically the the shell script "first" in the directory "first". Em_path.h also specifies which directory should be used for temporary files. Most programs from the Kit do indeed use that directory although some remain stubborn and use /tmp or /usr/tmp. .LP The shape of the tree should not be altered lightly because most Makefiles and the utility \fIack\fP know the shape of the ACK tree. All pathnames in all Makefiles are relative, that is do not have "/" as the first character. The knowledge of the utility \fIack\fP about the shape of the tree is concentrated in the files in the directory lib/*/descr and lib/descr/*. .NH Makefiles .PP Most directories contain a "Makefile". Apart from commands applying to that specific directory these files all recognize a few special commands. When called with one of these they will apply the command to their own directory and all subdirectories. The special commands are: .sp 1 .IP "install" 20 recompile and install all binaries and libraries. .br Some Makefiles allow errors to occur in the programs they call. They ignore such errors and notify the user with the message "~....... error code n: ignored". Whenever such a message appears in the output you can ignore it too. .IP "cmp" recompile all binaries and libraries and compare them to the ones already installed. .IP pr print the sources and documentation on the standard output. .IP opr make pr | opr .br Opr should be an off-line printer daemon. On some systems it exists under another name e.g. lpr. The easiest way to call such a spooler is using a shell script with the name opr that calls lpr. This script should be placed in /usr/bin or EM_DIR/bin or one of the directories in your PATH. .IP clean remove all files not needed for day-to-day use, that is binaries not in bin or lib, object files etc. .LP Example: .nf .sp 1 make install .sp 1 .fi given as command in the home directory will cause compilation of all programs in the directory and copying of the results to the bin and lib directories. .NH Fixes for the UNIX V7 system .PP UNIX System V7 has a few bugs that prevent a part of or the whole Kit from working properly. Berkeley 2.8 and/or 2.9 may also suffer from this problem. To be honest, we do not know which of the following changes are essential to the functioning of our Kit. The change to "ld" is. .PP The file "doc/v7bugs.doc" gives for each of the following bugs a small test program and a diff listing of the source files that have to be modified. .IP 1 Bug in the C optimizer for unsigned comparison .nr PD 0 .IP 2 The loader 'ld' fails for large data and text portions .IP 3 Floating point registers are not saved if more memory is needed. .IP 4 Floating point registers are not copied to child in fork(). .nr PD 1v .LP Use the test programs to see if the errors are present in your system and to check if the modifications are effective. .PP You may also have to change /usr/src/cmd/cc.c (/bin/cc) to pass the .B -i flag to .I ld. Also, /usr/src/cmd/ld.c (/bin/ld) may have to be changed to increase the number of library positions it can hold. On our (2.9 BSD) version, this is the constant .I NROUT. It must be at least 400. This may require separate I&D. Also, our version does not check that the table does not overflow. .NH Testing .PP Test sets are available in Pascal, C, Basic and EM assembly. .IP em 8 .br The directory emtest contains a few EM test programs. The EM assembly files in these tests must be transformed into load files. These tests use the LIN and NOP instructions to mark the passing of each test. The NOP instruction prints the current line number during the test phase. Each test notifies its correctness by calling LIN with a unique number followed by a NOP which prints this line number. The test finishes normally with 0 as the last number printed In all other cases a bug showed its existence. .IP Pascal .br The directory lang/pc/test contains a few Pascal test programs. All these programs print the number of errors found and a identification of these errors. .sp 1 .ti +4 We also tested Pascal with the Validation Suite. The Validation Suite is a collection of more than 200 Pascal programs, designed by Brian Wichmann and Arthur Sale to test Pascal compilers. We are not allowed to distribute it, but you may request a copy from .DS Richard J. Cichelli A.N.P.A. 1350 Sullivan Trail P.O. Box 598 Easton, Pennsylvania 18042 USA .DE .IP C .br The sub-directories in lang/cem/ctest contain C test programs. The idea behind these tests is: when you have a program called xx.c, compile it into xx.cem. Run it with standard output to xx.cem.r, compare this file to xx.cem.g, a file containing the 'ideal' output. Any differences will point to implementation differences or bugs. Giving the command "run gen" or plain "run" starts this process. The differences will be presented on standard output. The contents of the result files depend on the wordsize, the xx.cem.g files on the distribution are intended for a 32-bit machine. .IP Basic .br The directory lang/basic/test contains some forty basic programs. Not all of these programs are correct, some have syntactic errors, some simply don't work. The Makefile in that directory attempts to compile and run these tests. If it compiles its output is compared to a file with suffix .g which contains the output to be expected. The make should be started with its standard input diverted to /dev/null. An example of the output of a make is present in the file Out.std. .NH Documentation .PP Manual pages for Amsterdam Compiler Kit can be copied to "/usr/man/man?" by the following commands: .DS cd man make install .DE but do this \fBafter\fR compiling the Kit. .LP Several documents are provided: .TS l l. doc/toolkit.doc general overview (CACM article) doc/em description of the EM machine architecture doc/ack.doc format of machine description files (lib/*/descr) doc/basic.doc Basic reference manual doc/pcref.doc Pascal-frontend reference manual doc/val.doc results of running the Pascal Validation Suite doc/crefman.doc C-frontend description doc/LLgen description of the LL(1) parser generator doc/peep.doc internal documentation for the peephole optimizer doc/cg.doc documentation for backend writers and maintainers doc/regadd.doc addendum to previous document describing register variables doc/ncg.doc documentation for the newest backends doc/v7bugs.doc bugs in the V7 system and how to fix them doc/6500.doc MSC 6500 backend description doc/i80.doc Intel 8080 backend description doc/z80.doc Zilog Z80 backend description doc/m68020.doc Motorola M68000/M68020 backend description doc/occam Occam-frontend description doc/ego Global Optimizer description doc/top Target Optimizer description doc/int description of the EM interpreter written in C doc/m2ref.doc Modula-2 frontend description doc/install.doc this document doc/install.pr this document (formatted) .TE .PP The names in this list without a suffix are in fact a subdirectory. Use the Makefile to get readable copies. .LP Good luck.