http://gcc.gnu.org/bugzilla/show_bug.cgi?id=47368
Summary: CFLAGS_FOR_TARGET, profiledbootstrap and lto-bootstrap flags unused in libstdc++-v3 Product: gcc Version: 4.6.0 Status: UNCONFIRMED Severity: normal Priority: P3 Component: libstdc++ AssignedTo: unassig...@gcc.gnu.org ReportedBy: howa...@nitro.med.uc.edu When building with... make -j profiledbootstrap BOOT_CFLAGS="-g -O3" CFLAGS_FOR_TARGET="-g -O3" using the configure options... Configured with: ../gcc-4.6-20110118/configure --prefix=/sw --prefix=/sw/lib/gcc4.6 --mandir=/sw/share/man --infodir=/sw/lib/gcc4.6/info --with-build-config=bootstrap-lto --enable-stage1-languages=c,lto --enable-languages=c,c++,fortran,lto,objc,obj-c++,java --enable-build-with-cxx --with-gmp=/sw --with-libiconv-prefix=/sw --with-ppl=/sw --with-cloog=/sw --with-mpc=/sw --with-system-zlib --x-includes=/usr/X11R6/include --x-libraries=/usr/X11R6/lib --program-suffix=-fsf-4.6 --enable-checking=yes --enable-cloog-backend=isl ...libstdc++-v3 does not utilize the CFLAGS_FOR_TARGET="-g -O3" flags in its build. This is unlike the other library directories such as libffi, libgcc, libgfortran, libgomp, libiberty, libobjc, libquadmath and libssp which all appear to use CFLAGS_FOR_TARGET. The libstdc++-v3 build also doesn't utilize the profiling flags produced in a profiledbootstrap or the lto flags produced from an lto-bootstrap.