http://gcc.gnu.org/bugzilla/show_bug.cgi?id=56909
--- Comment #14 from Arthur Zhang <mail2arthur at gmail dot com> 2013-04-17 21:02:14 UTC --- (In reply to comment #13) > > What is the benefit to use '--build=i686-pc-mingw32' than > > '--with-arch=i686'? > > It doesn't force -march=i686 by default. Why below output has '-march=pentiumpro'? bash-3.1$ gcc -v -o t.exe ./test.c Using built-in specs. COLLECT_GCC=c:\MinGW\bin\gcc.exe COLLECT_LTO_WRAPPER=c:/mingw/bin/../libexec/gcc/i686-pc-mingw32/4.8.0/lto-wrappe r.exe Target: i686-pc-mingw32 Configured with: ../gcc-4.8.0/configure --enable-languages=c,c++,ada,fortran,obj c,obj-c++ --disable-sjlj-exceptions --with-dwarf2 --enable-shared --enable-libgo mp --disable-win32-registry --enable-libstdcxx-debug --enable-version-specific-r untime-libs --build=i686-pc-mingw32 --prefix=/mingw Thread model: win32 gcc version 4.8.0 (GCC) COLLECT_GCC_OPTIONS='-v' '-o' 't.exe' '-mtune=generic' '-march=pentiumpro' ...
