Gpc September 2012

gpc@gnu.de

8 participants
7 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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Re: running gpc on Mac OS X 10.7.4
by Thomas Schneider 06 Sep '12

06 Sep '12

Kevan: > I'm running GPC just fine on 10.7.4. I may have installed on an earlier > version of 10.7 and then upgraded. I installed the Mac OS X 10.6 Intel > version I found here: > > http://www.microbizz.nl/gpc.html > > What did you install? I hadn't installed, but I went to that page and installed from â¢ GNU Pascal 3.4.6u4 installer for Mac OS X 10.6 Intel native and PowerPC cross-compiler15.7 MB) It SAYS it's supposed to be ONLY for 10.6, but I went ahead anyway on 10.7. In /Developer/Pascal it installed cleanly and replaced directory gpc346u2 with gpc346u4. I can now compile: egg 18% cat h.p program helloworld (output); begin writeln(output,'hello world'); end. egg 19% gpc h.p ld: warning: -macosx_version_min not specified, assuming 10.7 ld: warning: PIE disabled. Absolute addressing (perhaps -mdynamic-no-pic) not allowed in code signed PIE, but used in __start from /Developer/SDKs/MacOSX10.5.sdk//usr/lib/crt1.o. To fix this warning, don't compile with -mdynamic-no-pic or link with -Wl,-no_pie egg 20% a.out hello world Thanks, Tom Thomas D. Schneider, Ph.D. Senior Investigator National Institutes of Health National Cancer Institute Frederick National Laboratory for Cancer Research Gene Regulation and Chromosome Biology Laboratory Molecular Information Theory Group Frederick, Maryland 21702-1201 http://alum.mit.edu/www/toms

2 1

collect2 no PATH override
by Jay Michael 03 Sep '12

03 Sep '12

I think "collect2" should honor all of the "where to find compiler components" switches fed to GPC. I think it would be helpful if GPC defaulted to acting as if it were run with "-B <directory containing gpc>" (unless the user provides a "-B" switch). The "collect2" in the binary distribution of gpc-2007-09-04 for Windows doesn't seem to make any effort to locate the "ld" it runs -- if there is no "ld" in the PATH, it prints ld-orig: No such file or directory I have been running GPC without putting GPC\bin in my PATH. It has been working. Then I discovered that when I installed Free Pascal, it took the liberty of updating my system-wide PATH. When I removed it from my PATH, running GPC\bin\gpc resulted in gpc: installation problem, cannot exec `as': No such file or directory Adding "-B GPC\bin" solves that, but has no effect on "collect2" finding "ld".

3 2

RangeCheckError from RuntimeError
by Jay Michael 03 Sep '12

03 Sep '12

My program was terminating with no runtime error message. When run in gdb, gdb told me it terminated with exit code 52 (I think octal). I had a Range Check Error. In gdb, I see that _p_RangeCheckError calls _p_RuntimeError. Then, _p_RuntimeError has code that might call _p_RangeCheckError. I didn't trace further -- gdb suddenly becomes unable to single-step, says "Unable to set breakpoint number -37". (The specific number changes if I keep trying to single-step. It's always negative.) I don't know how much better it would have been, but shouldn't _p_RuntimeError have been compiled with range checking suppressed? (I've found source for RangeCheckError and RuntimeError. I can't find source for CString2String -- is it an intrinsic function? It seems to have been inline coded in RuntimeError.)

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MoveLeft / MoveRight special cases
by Jay Michael 03 Sep '12

03 Sep '12

The procedures MoveLeft and MoveRight start with a test for whether special case code will be useful/possible. procedure MoveLeft (const Source; var Dest; Count: SizeType); if (Count >= SizeOf (LongestCard)) and not (pDst - pSrc in [0 .. 2 * SizeOf (TWord) - 1]) then procedure MoveRight (const Source; var Dest; Count: SizeType); if (Count >= SizeOf (LongestCard)) and not (pSrc - pDst in [0 .. 2 * SizeOf (TWord) - 1]) then Procedure Move calls MoveRight when the address of the source is less than the source of the destination, so the difference will always be negative (except when source and destination are the same address), so the difference will never be in the range [0..2*SizeOf(TWord)-1]. Shouldn't those differences be reversed? Shouldn't the threshold be either SizeOf(LongestCard) in both clauses, or 2*SizeOf(TWord) in both clauses?

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Re: Windows install
by Jay Michael 02 Sep '12

02 Sep '12

Trying to get the source corresponding to the 20070904 Windows distribution, I have downloaded and unpacked gpc-20070904.tar.bz2 mingw-gcc-core-3.4.5-20060117-2-src.tar.gz Between them, they don't seem to be the complete source of the binary distribution I have installed. I can't find any reference to "winmain", which I'm sure is involved in a Windows GUI application. The only version of "collect2" is in the "gcc" chain. It doesn't invoke "windres", and it certainly doesn't say "ld-orig" when it can't find "ld". What do I need to download to be in a position to build GPC under and for Windows?

2 1

running gpc on Mac OS X 10.7.4
by Schneider, Thomas (NIH/NCI) [E] 02 Sep '12

02 Sep '12

gpc folks: I have moved to a new Mac running OS X 10.7.4 and Gnu Pascal now doesn't work: % more h.p program helloworld (output); begin writeln(output,'hello world'); end. % gpc h.p ld: library not found for -lSystemStubs collect2: ld returned 1 exit status Any suggestions on how to fix this? Thanks, Tom Thomas D. Schneider, Ph.D. Senior Investigator National Institutes of Health National Cancer Institute Frederick National Laboratory for Cancer Research Gene Regulation and Chromosome Biology Laboratory Molecular Information Theory Group Frederick, Maryland 21702-1201 http://alum.mit.edu/www/toms

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Gpc September 2012