Gpc October 2011

gpc@gnu.de

6 participants
4 discussions

GPC with gcc-4.[23]
by Waldek Hebisch 18 Apr '13

18 Apr '13

I did some work on updating gpc to newer gcc versions. You can find it at GitHub: https://github.com/hebisch/gpc This is experimental work. 4.2 and 4.3 ports (on "master" Git branch) are basically in "works for my purpose" state: on my machine compiler builds and passes test suite with small (but nonzero) number of failures. On 4.5.1 there is initial port to gcc-4.[45] -- this one is broken from user point of view and may be of some use only for people who want to seriously work on the compiler. Note that this is _not_ a release. There are relatively easy to fix but non working things (in particular some features of Makefiles are broken). Testing was limited to running testsute just for one configuration. I estimate that fixing easily fixable stuff and polishing things would take me about a week -- unfortunately I am busy with other things. So I decided to make the code available "as is". If there will be bug reports, I will look at them and there is reasonable chance that I will fix them. But otherwise I do not plan to work on gpc in near future. If you want to try the code note that there are changes to build process, look at toplevel README file. -- Waldek Hebisch hebisch(a)math.uni.wroc.pl

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is this a bug in GPC?
by Leo Brewin 29 Oct '11

29 Oct '11

Hi Troops, I've been using Adriaan's recent gpc (gpc436u1) on MacOSX 10.7.2 with Xcode 4.2 and I think I have found a bug. I've attached a rather odd but simple code that can produce a segmentation fault. This is what I get when running the code through gdb Program received signal EXC_BAD_ACCESS, Could not access memory. Reason: KERN_INVALID_ADDRESS at address: 0xc0000140 0x917a4a89 in longcopy () (gdb) where #0 0x917a4a89 in longcopy () #1 0x9178ec98 in memmove$VARIANT$sse3x () #2 0x000018c0 in Jack (l1=1, u1=4, x_beg=@0xbfffed10, l2=1, u2=4, x_end=@0xbfffecf0) at foo.p:25 #3 0x00001a05 in Jill () at foo.p:48 #4 0x00001a34 in main program () at foo.p:57 #5 0x00001aab in main (argc=1, argv=0xbfffeda0, envp=0xbfffeda8) at foo.p:1 (gdb) quit It seems that the crash occurs when starting up the procedure Mary. It looks like something to do with a copy of the two arrays x_beg and x_end. If I change the formal declarations to var arrays then the problem does not occur. So I have a workaround but it is not ideal. And almost any other change to the code seems to also remove the seg fault (e.g. use just one case in the case statement, set my_choice=1, make x_beg, x_end array[1..3], add a written anywhere etc.) Any thoughts or suggestions? Cheers Leo Brewin School of Mathematical Sciences Monash University // ----------------------------------------------------------------------------------- // compile this with gpc346u1 leads to a segmentation fault // gpc -o foo foo.p program Fred(input,output); var my_choice : integer; // the segmentation fault does not ocurr if the the following two arrayas are passed as var ... procedure Mary(x_beg : array[l1..u1:integer] of double; x_end : array[l2..u2:integer] of double); begin end; procedure Jack(var x_beg : array[l1..u1:integer] of double; var x_end : array[l2..u2:integer] of double); begin case my_choice of 1: Mary(x_beg,x_end); 2: Mary(x_beg,x_end); otherwise ; end; end; procedure Jill; var x_0 : array[1..4] of double; x_1 : array[1..4] of double; begin x_0[1]:=0.0e0; x_0[2]:=0.0e0; x_0[3]:=0.0e0; x_0[4]:=0.0e0; x_1[1]:=0.1e0; x_1[2]:=0.0e0; x_1[3]:=0.0e0; x_1[4]:=0.0e0; Jack(x_0,x_1); end; begin my_choice:=1; // no problem using this my_choice:=2; // will cause a seg fault Jill; end.

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gpc in Mac OSX Lion
by Leo Brewin 25 Oct '11

25 Oct '11

Hi troops, Has anybody successfully compiled GPC under MacOSX Lion? I've tried doing so using Adriaan's sources (gpc346u4-sources.dmg) but I encountered the following errors (as listed below). Any help would be greatly appreciated. Cheers, Leo Brewin School of Mathematical Sciences Monash University stage1/xgcc -Bstage1/ -B/Users/leo/tmp-pascal/gpc346u4/i386-apple-darwin11/bin/ -g -O2 -DIN_GCC -W -Wall -Wwrite-strings -Wstrict-prototypes -Wmissing-prototypes -pedantic -Wno-long-long -Wold-style-definition -DHAVE_CONFIG_H -DGENERATOR_FILE -o genmodes \ genmodes.o errors.o ../libiberty/libiberty.a ld: warning: -macosx_version_min not specificed, assuming 10.7 Undefined symbols for architecture i386: "___bzero", referenced from: _htab_empty in libiberty.a(hashtab.o) ld: symbol(s) not found for architecture i386 collect2: ld returned 1 exit status make[2]: *** [genmodes] Error 1 make[1]: *** [stage2_build] Error 2 make: *** [bootstrap] Error 2

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Latest versions of gpc
by John Gordon Ollason 13 Oct '11

13 Oct '11

Greetings, Having upgraded to Fedora 15 I'd like to install gpc again, but I don't know where to look for the latest version. I have found a source for gpc-20070904 but I haven't yet managed to compile it. (Is that the latest version?) I suppose that by now the language must have lost most of its users, but I still, occasionally, write some Pascal code, and would like to be able to compile it. Thanks for any advice, John Ollason

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Gpc October 2011