Date: Thu, 12 Oct 2006 15:02:45 +0200 From: "O. Hartmann" <ohartman@uni-mainz.de> To: Kostik Belousov <kostikbel@gmail.com> Cc: Mikhail Teterin <mi+mx@aldan.algebra.com>, gerald@freebsd.org, stable@freebsd.org Subject: OT: Re: Bug in 6.x' C++ compiler Message-ID: <452E3CF5.8010707@uni-mainz.de> In-Reply-To: <20061012095414.GM60834@deviant.kiev.zoral.com.ua> References: <200610111322.57735.mi%2Bmx@aldan.algebra.com> <20061012095414.GM60834@deviant.kiev.zoral.com.ua>
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Kostik Belousov wrote: > 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). Well, I hope this bug has been sent by heaven and speeds up swapping system compiler of FreeBSD 6.X to 4.1 or 4.X :-)
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