On Wed, Oct 11, 2006 at 01:22:57PM -0400, Mikhail Teterin wrote: > GCC would not fix the bug described in > > http://gcc.gnu.org/bugzilla/show_bug.cgi?id=29390 > > because the compiler is of an unsupported version (they only support 4.x now). > > Yet, the problem is rather real and hits when the devel/icu port is > built with low optimization (-O1 or -O0). > > Any chance, someone with interest in GCC internals and FreeBSD can > find the fix? > > Simply compiling the loctest.ii, that is attached to the above bugzilla > report, is enough to reproduce the problem. Compiling with `-march=pentium4' > triggers the bug -- a bogus symbol is inserted: > > % c++ -O0 -g -c -pipe -march=pentium4 loctest.ii > % nm locate.o | fgrep .LC > U .LC786 > > Compiling without the -march (or with -O2) does not insert the bogus symbol: > > % c++ -O2 -g -c -pipe -march=pentium4 loctest.ii > % nm loctest.o | fgrep .LC > % c++ -O0 -g -c -pipe loctest.ii > % nm loctest.o | fgrep .LC > % > > I'm seeing this with both 3.4.4 and 3.4.6 versions of GCC... Thanks! > > -mi deviant% /usr/local/opt/gcc-3.4.6/bin/g++ -O0 -g -c -fno-strict-aliasing -pipe -march=pentium4 loctest.ii deviant% nm loctest.o | grep LC U _ZNK7icu_3_66Locale7getLCIDEv deviant% c++ -O0 -g -c -fno-strict-aliasing -pipe -march=pentium4 loctest.ii deviant% nm loctest.o | grep LC U .LC786 U _ZNK7icu_3_66Locale7getLCIDEv deviant% /usr/local/opt/gcc-3.4.6/bin/g++ -v Reading specs from /usr/local/opt/gcc-3.4.6/lib/gcc/i386-little-freebsd6/3.4.6/specs Configured with: ../gcc-3.4.6/configure --prefix=/usr/local/opt/gcc-3.4.6 --enable-shared --enable-threads --with-system-zlib --enable-__cxa_atexit --disable-nls --enable-long-long --with-as=/usr/local/opt/binutils/bin/as --with-ld=/usr/local/opt/binutils/bin/ld --enable-languages=c,c++,f77,objc,ada,java --host=i386-little-freebsd6 Thread model: posix gcc version 3.4.6 deviant% c++ -v Using built-in specs. Configured with: FreeBSD/i386 system compiler Thread model: posix gcc version 3.4.6 [FreeBSD] 20060305
opt/gcc-3.4.6 is the stock version of the 3.4.6 built directly from the FSF sources (relatively long time ago).
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