Date: Sat, 04 Aug 2007 19:50:56 +0200 From: Niklas Sorensson <nik@cs.chalmers.se> To: freebsd-current@FreeBSD.org Subject: gcc 4.2 profiling breaks argv Message-ID: <46B4BC80.1080902@cs.chalmers.se>
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Hi,
following up on the thread started by Nick Frampton yesterday:
I can repeat the problem, although it looks slightly different. Instead of
crashing when argv is accessed, both argc and argv are zero. This behavior is
triggered by both gcc 4.2.0 and 4.2.1:
nik> cat test.c
#include <stdio.h>
int main (int argc, char **argv) {
fprintf (stderr, "argc=%d, argv=%p\n", argc, argv);
return 0;
}
nik> cc -c -o test.o -pg test.c && cc -o test -pg test.o
nik> ./test
argc=0, argv=0x0
nik> gcc42 -c -o test.o -pg test.c && gcc42 -o test -pg test.o
nik> ./test
argc=0, argv=0x0
nik> cc -v
Using built-in specs.
Target: i386-undermydesk-freebsd
Configured with: FreeBSD/i386 system compiler
Thread model: posix
gcc version 4.2.0 20070514 [FreeBSD]
nik> gcc42 -v
Using built-in specs.
Target: i386-portbld-freebsd7.0
Configured with: ./..//gcc-4.2.1-RC-20070712/configure --disable-nls
--with-system-zlib --with-libiconv-prefix=/usr/local --with-gmp=/usr/local
--program-suffix=42 --libdir=/usr/local/lib/gcc-4.2.1
--with-gxx-include-dir=/usr/local/lib/gcc-4.2.1/include/c++/ --disable-libgcj
--prefix=/usr/local --mandir=/usr/local/man --infodir=/usr/local/info/gcc42
i386-portbld-freebsd7.0
Thread model: posix
gcc version 4.2.1 20070712 (prerelease)
nik> uname -a
FreeBSD apa 7.0-CURRENT FreeBSD 7.0-CURRENT #0: Fri Aug 3 18:08:53 CEST 2007
root@apa:/usr/obj/usr/src/sys/APA i386
Incidentally, I noticed that lang/gcc42 fails to build unless GNU awk is
installed. There is at least one awk-script used during the build that produces
the wrong result with the default awk. I think other gcc-based ports may be
affected, since I observed the same problem with lang/llvm-gcc4.
Cheers,
/Niklas
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