July 2003 - Gpc

Make error when I compile gpc under FreeBSD
by Karim Forsthofer 14 Jul '03

14 Jul '03

Hello I have FreeBSD 5.1 beta, and I downloaded the gpc version gpc-20020510 and gcc-core version 2.95.2 form the gnu pascal main page. I made each step exactly like written in the "compiling gpc" Howto from the page. The configure script worked fine, but "make" puts an error on the screen : /usr/home/name/gcc-2.95.2/libiberty/sterror.c:465: conflicting for 'sys_nerr' /usr/include/stdio.h:350: previous decleration of 'sys_nerr' ***Error code 1 (note: Under FreeBSD the home dir is in /usr/home/name) Can anybody help me to fix this error ? __________________________________________________________________ Gesendet von Yahoo! Mail - http://mail.yahoo.de Logos und KlingeltÃ¶ne fÃ¼rs Handy bei http://sms.yahoo.de

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gpc --help --v
by Adriaan van Os 13 Jul '03

13 Jul '03

gpc --help -v displays a list of available compiler options. Pascal specific options, however, are truncated to the first 23 characters, e.g. -fobject-destination-pa Path where to create ... Back-end options don't seem to be truncated, e.g. -fguess-branch-probability Enables guessing of ... The list of options is quite useful, even better in untruncated form. Regards, Adriaan van Os

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Unit dependencies
by Adriaan van Os 13 Jul '03

13 Jul '03

Chapter 12.10 of the GPC docs "GPC’s Automake Mechanism – How it Works" reads as follows: "When a program/module/unit imports (uses) an interface, GPC searches for the GPI file (see Section 12.9 [GPI files], page 476) derived from the name of the interface. Case 1: A GPI file was found. Each GPI file contains the name of the primary source file (normally a ‘.pas’ or ‘.p’ file) of the module/unit, and the names of all interfaces imported. GPC reads this information and invokes itself with a command like gpc foo.pas -M -o foo.d This means: preprocess the file, and write down the name of the object file and those of all its source files in ‘foo.d’. GPC reads ‘foo.d’ and looks if the object file exists and if the source was modified since the creation of the object file and the gpi file. If so, GPC calls itself again to compile the primary source file. When everything is done, the ‘.d’ file is removed. If there was no need to recompile, all interfaces imported by the module/unit are processed in the same way as this one." I may be doing something wrong but "gpc foo.pas -M -o foo.d" doesn't give the primary source file nor the names of all interfaces imported, instead the '.d' file is always empty .... Any clues or hints ? Full information on all unit dependencies is crucial in the project I am working on (an IDE plugin for GPC). Regards, Adriaan van Os

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range check test programs
by Francois Schoubben 12 Jul '03

12 Jul '03

For the main tests, i hope it's the end... Up to you to correct my tests... http://www.info.fundp.ac.be/~fsc/dvpt/fsc.tar.gz or, "online" http://www.info.fundp.ac.be/~fsc/dvpt/ fsc01-05 : array R/W fsc06-10 : packed array R/W fsc11 : array in a record (just one, i dont think it's usefull :) ) fsc12 : enum fsc13-14 : string (R/W) fsc15-16 : range write (integer and char) fsc 17-18 : functions and range fsc 19-25 : predefined functions (chr, fillchar, ...) fsc26-27 : conformant array R/W fsc28-30 : slice array fsc31-35 : actual schema discriminant fsc36-37 : "for loops", i'm not sure it's what you expect... For asm target, i have a problem... The only "assembler language" i know is MIX (thanks D. Knuth :-) )... And i haven't really got time to learn it before... long time i'm afraid... Can anybody help here??? For the remaining... What's missing? wrong? misunderstood? I've never played with delphi extensions, the OO language i used was java. And i'm teaching the very basics of programming so, i never used slice array and other schema discriminant before, it's possible i missed a lot of thing... Just explain me (or point me to a relatively short tutorial), i only ask to learn :) -- Francois Schoubben

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ncurses
by Paul Davidson 11 Jul '03

11 Jul '03

Morning Have been trying to get CRT unit working with Terminal but received no success. The crtdemo.pas (http://www.gnu-pascal.de/demos/crtdemo.pas) example partially works. Colours, character sets and other parts do not. In code tests here, even a Write( c ) to screen does not always work. Are there DETAILED instructions on how to get this to work? Mac OS X 10.2.6 Thank you p davidson http://coraxnetworks.com

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object bug report
by Russell Whitaker 10 Jul '03

10 Jul '03

Hi: Took the Chief's sample, added one line, calling file obj1.pas; then: gpc -o obj obj1.pas program obj1; type a = object procedure p; end; b = object (a) procedure p; virtual; end; procedure a.p; begin writeln ('a'); end; procedure b.p; begin writeln ('b'); end; var foo : a; bar : b; begin foo.p; bar.p; end. Got this: obj1.pas:10: internal error: Segmentation fault Please submit a full bug report, with preprocessed source if appropriate. See <URL:http://www.gnu-pascal.de/todo.html> for instructions. Using this: Reading specs from /usr/local/lib/gcc-lib/i586-pc-linux-gnu/3.2.2/specs Configured with: ../gcc-3.2.2/configure --enable-languages=pascal : (reconfigured) ../gcc-3.2.2/configure --enable-languages=pascal : (reconfigured) ../gcc-3.2.2/configure --enable-languages=pascal Thread model: posix gpc version 20030209, based on gcc-3.2.2 Russ

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gpc-20030507/gcc-3.2.3 test results
by J. David Bryan 09 Jul '03

09 Jul '03

The following test results were obtained with gpc version 20030507, based on gcc-3.2.3 (mingw special 20030504-1), configured for i486-pc-mingw32: ------------------ TEST agettext2test.pas: SKIPPED: libintl not installed TEST crttest.pas: SKIPPED: no curses library found TEST dialec3.pas: ./../units/dos.pas: In procedure `GetCBreak': ./../units/dos.pas:704: warning: suggest parentheses around `and' in operand of `<>' OK TEST dialec6.pas: ./../units/dos.pas: In procedure `GetCBreak': ./../units/dos.pas:704: warning: suggest parentheses around `and' in operand of `<>' OK TEST dostest.pas: gpc1.exe: warnings being treated as errors ./../units/dos.pas: In procedure `GetCBreak': ./../units/dos.pas:704: warning: suggest parentheses around `and' in operand of `<>' gpc1.exe: F:\Programming\GNU\root\usr\local\gpc-mingw\bin\gpc.exe exited with status 1 failed TEST dostest2.pas: gpc1.exe: warnings being treated as errors ./../units/dos.pas: In procedure `GetCBreak': ./../units/dos.pas:704: warning: suggest parentheses around `and' in operand of `<>' gpc1.exe: F:\Programming\GNU\root\usr\local\gpc-mingw\bin\gpc.exe exited with status 1 failed TEST environo.pas: SKIPPED: setenv not present in libc TEST fjf480a.pas: SKIPPED: librx not installed TEST fjf480b.pas: SKIPPED: librx not installed TEST fjf663.pas: SKIPPED: IOSelectRead not supported on this system TEST gettexttest.pas: SKIPPED: libintl not installed TEST gmptest.pas: SKIPPED: libgmp not installed TEST pipetes2.pas: Unexpected output `Unexpected output `Unexpected output `Unexpected output `Unexpected output [...] TEST pipetest.pas: SKIPPED: IOSelect not yet implemented for mingw TEST regextest.pas: SKIPPED: librx not installed TEST windtes2.pas: gpc1.exe: warnings being treated as errors ./../units/dos.pas: In procedure `GetCBreak': ./../units/dos.pas:704: warning: suggest parentheses around `and' in operand of `<>' gpc1.exe: F:\Programming\GNU\root\usr\local\gpc-mingw\bin\gpc.exe exited with status 1 gpc1.exe: F:\Programming\GNU\root\usr\local\gpc-mingw\bin\gpc.exe exited with status 1 failed TEST windtest.pas: gpc1.exe: warnings being treated as errors ./../units/dos.pas: In procedure `GetCBreak': ./../units/dos.pas:704: warning: suggest parentheses around `and' in operand of `<>' gpc1.exe: F:\Programming\GNU\root\usr\local\gpc-mingw\bin\gpc.exe exited with status 1 failed TEST y2k.pas: gpc1.exe: warnings being treated as errors ./../units/dos.pas: In procedure `GetCBreak': ./../units/dos.pas:704: warning: suggest parentheses around `and' in operand of `<>' gpc1.exe: F:\Programming\GNU\root\usr\local\gpc-mingw\bin\gpc.exe exited with status 1 failed # of GPC tests 3594 # of GPC tests passed 3576 # of GPC tests skipped 10 # of GPC tests failed 8 ------------------ Suppression of the warning suggesting parentheses or repair of the associated source file would eliminate 7 of the 8 failing tests (note that "dialec3.pas" and "dialec6.pas" report "OK" but apparently are counted as failing tests). The "pipetes2.pas" test outputs "`Unexpected output " repeatedly until 2048 characters are printed. I have trimmed the text for this report. To compile gpc using gcc-3.2.3, the change described by Russ Whitaker in his message of 7th June 2003 (to line 42 of p/config-lang.in) was needed. -- Dave

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gpc20030507 with gcc-3.3 on Mac OS X
by Adriaan van Os 08 Jul '03

08 Jul '03

Peter N Lewis wrote, > #### > #### FDE 0x2aea4 (OB 0x13fd60, fde_end 0x2affc) has zero > length!Aborting. > #### > Abort Fixed with gcc-3.3. Geoff Keating wrote: > > Adriaan van Os writes: >> (4) compiling any .c source with -ggdb or -gdwarf-2 (instead of >> -gstabs or -g) produces the following output: >> Internal compiler error in default_no_named_section, at varasm.c:5305 > > Darwin doesn't really support dwarf2 at present. Fixed with gcc-3.3, there is now a message "unknown or unsupported -g option". Geoff Keating wrote: > > Adriaan van Os writes: > >> Does anyone know what the status is of the following problems, >> encountered with gcc-3.2.1/3.2.2 on Darwin/Mac OS X ? >> >> (1) trampolines crash (I have a patch to fix it) >> >> (2) longjumps crash (I have a patch to fix it also) >> >> (3) non-local goto's don't work, e.g. > > These are all fixed in GCC 3.3. Well, not quite. Longjump crashes and non-local goto crashes have been fixed, but trampoline crashes not. The gcc-3.2.x trampoline patch can be applied to gcc-3.3 and it fixes most trampoline crashes, but ..... ./test_run: line 193: 766 Segmentation fault "$DIFF" testmake.tmp "$xo" TEST fproc.pas: failed ... running the testuite for fproc.pas takes a long time and fails. After a while the hardddisk starts to spin continuously, which might indicate that the system is allocating lots virtual memory (on a 1.25 GB Mac). After this, gpc1 crashes when compiling ANY .pas file, until a reboot. The typical backtrace looks like this: Date/Time: 2003-05-18 03:11:07 +0200 OS Version: 10.2.4 (Build 6I32) Host: G4.local. Command: gpc1 PID: 27979 Exception: EXC_BAD_ACCESS (0x0001) Codes: KERN_PROTECTION_FAILURE (0x0002) at 0x00000000 Thread 0 Crashed: #0 0x0014ec68 in find_reloads (reload.c:4000) #1 0x0011bbe8 in reload_as_needed (reload1.c:3893) #2 0x00115388 in reload (reload1.c:1107) #3 0x001dca60 in global_alloc (global.c:583) #4 0x000991ec in rest_of_compilation (toplev.c:3304) #5 0x00007b58 in finish_routine (declarations.c:2436) #6 0x0002d27c in main_yyparse (parse.c:1739) #7 0x00097ce0 in compile_file (toplev.c:2134) #8 0x0009ce94 in do_compile (toplev.c:5370) #9 0x0009cf60 in toplev_main (toplev.c:5400) #10 0x00002700 in _start (crt.c:267) #11 0x00002580 in start Maybe, virtual memory is corrupt after the fproc.pas testrun ?? Running the testsuite for fproc.pas with --longjmp-all-nonlocal-labels, results in a compiler error message: TEST fproc.pas: /var/tmp//ccMu9pMb.s:unknown:Can't emit reloc {- symbol "LSJR11"} @ file address 800. /var/tmp//ccMu9pMb.s:unknown:Can't emit reloc {- symbol "LSJR11"} @ file address 796. /var/tmp//ccMu9pMb.s:unknown:Undefined local symbol L3$pb failed Regards, Adriaan van Os

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Real with attributes (...)
by Mirsad Todorovac 08 Jul '03

08 Jul '03

Please read without prejudice! What would you think of the following: we all know about various bitsizes Integer and Cardinal types. What I've seen was a "customized" real type. Imagine you have to store lots of data for GSM-encoding, or some similar measurement purpose. Lots of bits are wasted, as they don't correspond to accurate digits of measurement. I.e. on a weather station that has only an occassional link to a satellite. For example, let's suppose we have lots of data that that we could express as reals in 16-bit precision, and all fit between -0.5 and 0.5 (for example, but standard can be defined in different way): type MyReal = Real attribute (Exponent = 0, Mantissa = 16); GSMReal = Real attribute (Exponent = 8, Mantissa = 8); The latter could represent a number with same range like IEEE single precision float, just with only 2 accurate digits. or even TEMPReal = Real attribute (ExponentRange = 0..15, Mantisa = 4); for keeping the temperature in one byte from range of 0.0625 K to 30720 K (where precision is not that much important as the value on the logarithmic scale ...) The compiler could use hardware floating point when it's faster than emulation with less bits of precision, then round/truncate when storing back into memory/variable. This is just a tip, not a real syntax or semantics proposal. Mirsad -- "I have a dream!" -- Martin Luther King Jr.

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[Bug] Compiler error when accessing packed array element
by J. David Bryan 07 Jul '03

07 Jul '03

The following program: program bug; type r = packed record a : char; b : array [1..4] of char end; var v : r; i : integer; c : char; begin c := v.a; { line 13: succeeds } c := v.b [1]; { line 14: succeeds } c := v.b [i]; { line 15: fails } end. ...gives this improper compile-time error: bug.pas: In main program: bug.pas:15: cannot take address of packed record field `b' This is with gpc version 20030507, based on gcc-3.2.3 (mingw special 20030504-1), configured for i486-pc-mingw32. I also reproduced this with the Chief's gpc-20030507-gcc-3.2.3-i386-pc-mingw32.tar.gz. -- Dave

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