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FPC compiler bug: functional parameter invocation
by Régis Cridlig 04 Apr '08

04 Apr '08

Hello! This short program compiles without a warning, but crashes at execution. The compiler is FPC 2.2 on the win32 platform. program Crashes(input,output); function B(l:integer):boolean; begin B:=true; end; procedure Q(j:integer;function A(l:integer):boolean); function E(l:integer):boolean; begin E := false end; begin if A(j) then Q(200,E); end; begin Q(100,B); end. This is the compiler command: $ gpc --classic-pascal -g -Wall crashes.p Here are the stack frames from gdb: Loaded symbols for /cygdrive/c/WINDOWS/system32/ntdll.dll Loaded symbols for /cygdrive/c/WINDOWS/system32/kernel32.dll Loaded symbols for /usr/bin/cygwin1.dll Loaded symbols for /cygdrive/c/WINDOWS/system32/advapi32.dll Loaded symbols for /cygdrive/c/WINDOWS/system32/rpcrt4.dll Loaded symbols for /cygdrive/c/WINDOWS/system32/secur32.dll Program received signal SIGSEGV, Segmentation fault. 0x0022cc20 in ?? () (gdb) bt #0 0x0022cc20 in ?? () #1 0x004010a9 in _p__M0_S1_Q (J=200, A=@0x22cc20) at crashes.p:16 #2 0x004010c6 in _p__M0_S1_Q (J=100, A=@0x401050) at crashes.p:16 #3 0x004010e2 in _p__M0_main_program () at crashes.p:20 #4 0x0040115b in main (argc=1, argv=0x6927b0, envp=0x690090) at <implicit code>:22 I am pretty sure that this is a compiler bug, because this program used to run on MacPascal with no error. -- Regis Cridlig cridlig(a)gmail.com

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Re: FPC compiler bug: functional parameter invocation
by Prof A Olowofoyeku (The African Chief) 04 Apr '08

04 Apr '08

> On 3 Apr 2008 at 14:25, Régis Cridlig wrote: > > > What is the latest stable release of gpc? > > http://www.math.uni.wroc.pl/~hebisch/gpc/gpc-20070904.tar.bz2 You can get Cygwin binaries here: http://gnu-pascal.de/contrib/chief/win32/cygwin/ Best regards, The Chief -------- Prof. Abimbola A. Olowofoyeku (The African Chief) web: http://www.greatchief.plus.com/

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Re: FPC compiler bug: functional parameter invocation
by Prof A Olowofoyeku (The African Chief) 03 Apr '08

03 Apr '08

On 3 Apr 2008 at 12:14, Régis Cridlig wrote: [...] > > Here is the output of gpc -v > > > > $ gpc -v > > Reading specs from /usr/lib/gcc/i686-pc-cygwin/3.4.4/specs > > Configured with: > > /usr/build/package/orig/test.respin/gcc-3.4.4-3/configure --ver bose > > --prefix=/usr --exec-prefix=/usr --sysconfdir=/etc --libdir=/usr/lib > > --libe xecdir=/usr/lib --mandir=/usr/share/man --infodir=/usr/share/info > > --enable-langu ages=c,ada,c++,d,f77,pascal,java,objc --enable-nls > > --without-included-gettext -- enable-version-specific-runtime-libs > > --without-x --enable-libgcj --disable-java- awt --with-system-zlib > > --enable-interpreter --disable-libgcj-debug --enable-thre ads=posix > > --enable-java-gc=boehm --disable-win32-registry --enable-sjlj-exceptio ns > > --enable-hash-synchronization --enable-libstdcxx-debug Thread model: > > posix gpc version 20050331, based on gcc-3.4.4 (cygming special, gdc > > 0.12, using dmd 0 .125) That is a very old GPC release. I cannot reproduce the problem on gpc- 20060215 for example. Best regards, The Chief -------- Prof. Abimbola A. Olowofoyeku (The African Chief) web: http://www.greatchief.plus.com/

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Re: gpc and gcc-4.1.2
by Waldek Hebisch 16 Mar '08

16 Mar '08

Martin Marques wrote: > > Yes. Unpack gpc sources, make sure that p subdirectory from gpc > > source tree appears as gcc-4.1.2/gcc/p is gcc source tree (either > > use move or a symlink), configure and make. > > Didn't work. :-( > > make[2]: se ingresa al directorio > `/usr/src/redhat/BUILD/gcc-4.1.2-20070925/host-x86_64-unknown-linux-gnu/gcc' > gcc -c -g -O2 -DIN_GCC -W -Wall -Wwrite-strings -Wstrict-prototypes > -Wmissing-prototypes -pedantic -Wno-long-long -Wno-variadic-macros > -Wold-style-definition -Wmissing-format-attribute -DHAVE_CONFIG_H -I. > -I. -I../.././gcc -I../.././gcc/. -I../.././gcc/../include > -I../.././gcc/../libcpp/include ../.././gcc/dbxout.c -o dbxout.o > ../.././gcc/dbxout.c: In function ?dbxout_type?: > ../.././gcc/dbxout.c:1978: error: ?have_used_extensions? no se declaró > aquí (primer uso en esta función) > ../.././gcc/dbxout.c:1978: error: (Cada identificador no declarado > solamente se reporta una vez > ../.././gcc/dbxout.c:1978: error: ara cada funcion en la que aparece.) > make[2]: *** [dbxout.o] Error 1 > make[2]: se sale del directorio > `/usr/src/redhat/BUILD/gcc-4.1.2-20070925/host-x86_64-unknown-linux-gnu/gcc' > make[1]: *** [all-gcc] Error 2 > make[1]: se sale del directorio `/usr/src/redhat/BUILD/gcc-4.1.2-20070925' > make: *** [all] Error 2 > > Any ideas? > Do you really use use gcc-4.1.2? The name gcc-4.1.2-20070925 indicates that you have different version. IIRC the patch /usr/src/redhat/BUILD/ is was used for Redhat modified sources, which are usually different than official version. I would suggest to try to use unmodified gcc-4.1.2. If for some reason you need to use RedHat/Fedora specific version, please make sure first that you can compile gcc alone -- without gpc. Concerning the error message: it tells you that the identifier 'have_used_extensions' is undefined. AFAICS this identifier does not apper in gcc-4.1.2 (change log claims that it was removed in 2005). Gpc patches some gcc files, but the patch also does not contain it. So I think that you get message about 'have_used_extensions' because your 'gcc-4.1.2-20070925' is a modified version and that the modification contains error. -- Waldek Hebisch hebisch(a)math.uni.wroc.pl

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gpc and gcc-4.1.2
by Martin Marques 13 Mar '08

13 Mar '08

I'm trying to compile gpc on a Fedora 8 system, and I can' find instructions on how to compile it with newer versions of gcc. Should I just get the latest gpc sources and try to compile with newer gcc-4.1.2 sources?

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[Fwd: GCC 4.3.0 Released]
by Adriaan van Os 10 Mar '08

10 Mar '08

-------- Original Message -------- Subject: GCC 4.3.0 Released Date: Mon, 10 Mar 2008 06:21:34 -0400 From: Jakub Jelinek <jakub(a)redhat.com> Reply-To: Jakub Jelinek <jakub(a)redhat.com> To: gcc-announce(a)gcc.gnu.org GCC 4.3.0 has been released. GCC 4.3.0 is a major release, containing substantial new functionality not available in GCC 4.2.x or previous GCC releases. See: http://gcc.gnu.org/gcc-4.3/changes.html for more information about changes in GCC 4.3.0. This release is available from the FTP servers listed here: http://www.gnu.org/order/ftp.html The release is in gcc/gcc-4.3.0/ subdirectory. There is one important caveat. It was discovered after the final release has been made that some OS kernels on i?86 and x86_64 architectures violate the processor specific ABI with regards to the DF flag, if a process is interrupted with a signal while doing overlapping memmove or running some other code with DF flag set, the signal handler might be started with DF flag set on entry to the signal handler. GCC 4.3.0 no longer emits cld instructions unnecessarily, so GCC 4.3.0 compiled async signal handlers or functions the signal handlers call that rely on DF flag being cleared might misbehave. This will be hopefully fixed in the kernels soon and future GCC releases might provide an optional workaround for this bug. Fixes for some systems: Linux http://git.kernel.org/?p=linux/kernel/git/torvalds/linux-2.6.git;a=commitdi… FreeBSD http://www.freebsd.org/cgi/query-pr.cgi?pr=121422 Hurd http://sources.redhat.com/ml/libc-alpha/2008-03/msg00020.html If you encounter difficulties using GCC 4.3, please do not contact me directly. Instead, please visit http://gcc.gnu.org for information about getting help. As always, a vast number of people contributed to this GCC releases -- far too many to thank individually!

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Cross Compiler GPC
by david.garcia＠servext.dimetronic.es 25 Feb '08

25 Feb '08

Hi! I want a cross compiler GPC for Power PC, but I don´t know that I make to correctly configure my version of GPC in Linux. I use GCC 3.4.3. and GPC 20060325. Thanks Este mensaje y sus ficheros adjuntos se dirigen exclusivamente a su destinatario y pueden contener información privilegiada o confidencial. Si no es usted el destinatario indicado, queda notificado de que la utilización, divulgación y/o copia sin autorización está prohibida en virtud de la legislación vigente. Si ha recibido este mensaje por error, le rogamos que nos lo comunique inmediatamente por esta misma vía y proceda a su destrucción. Los ficheros adjuntos han sido comprobados con un programa anti virus antes de su transmisión, pero les recomendamos que efectúen sus propias comprobaciones antes de abrir cualquiera de ellos. No aceptamos responsabilidad alguna por daños o pérdidas causados por virus informáticos. English translation Tradução portuguesa

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Building shared objects with GP
by Pascal Viandier 13 Feb '08

13 Feb '08

Hi GPC crew, I am trying to build shared objects with gp on SUN Sparc Solaris 10 using gpc 20070904 based on gcc-4.1.2. I tried many options of gp with no success. It looks like gp does not pass the --shared and -fPIC command line options to gpc so it produces only regular objects. So, is there a way to benefit from gp's great features to generate shared objects? Thanks Pascal Viandier

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Is it possible to use dynamic arrays in gpc?
by Ohonin Yuriy 07 Feb '08

07 Feb '08

Hello. I'm trying to use such a code: type TVar = object param1, param2:string; .... end; TVarList = object Items:array of TVar; count:cardinal; ..... end; In Delphi and FPC it works fine, but in GPC i get an error 45: warning: missing string capacity -- assuming 255 49: error: syntax error before `of' Is it possible to use dynamic arrays in gpc? I had searched gpc manual, but it is not clear for me - may be, it is possible to use dynamic array only as function parametr? It seems to be a little strange - dynamic arrays are a very old feature :( -- Best regards, Yuriy Ohonin.

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"internal compiler error" with gpc-20070904 on CString2String use
by J. David Bryan 05 Feb '08

05 Feb '08

The attached program causes an "internal compiler error" when compiled using gpc version 20070904, based on gcc-3.4.5 (mingw special), running on Windows XP. -- Dave

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