On Mon, 2012-11-05 at 13:40 -0800, Steve Ellcey wrote: > Hm, I configured GCC with '--enable-languages=c,c++', I think this might > set ENABLE_LTO to '0' and cause check_effective_target_lto to return > FALSE and cause the -ffat-lto-objects flag to not be added. Of course > this raises the question of why it is trying to do lto testing if I > didn't configure it in. I will add 'lto' to my configure line and see > if that fixes the problem. > > Steve Ellcey > sell...@mips.com
OK, that was a red herring. The problem isn't check_effective_target_lto but check_linker_plugin_available. This is returning false because my compile can't find crt0.o. % /local/home/sellcey/nightly/obj-mips-mti-elf/gcc/final/gcc/xgcc -B/local/home/sellcey/nightly/obj-mips-mti-elf/gcc/final/gcc/ -v x.c -Tmti32.ld -o x /local/home/sellcey/nightly/obj-mips-mti-elf/gcc/final/gcc/collect2 -EB -mips32r2 -melf32btsmip -o x /local/home/sellcey/nightly/obj-mips-mti-elf/gcc/final/gcc/crti.o /local/home/sellcey/nightly/obj-mips-mti-elf/gcc/final/gcc/crtbegin.o -L/local/home/sellcey/nightly/obj-mips-mti-elf/gcc/final/gcc /tmp/ccgdsofE.o -lgcc -lgcc /local/home/sellcey/nightly/obj-mips-mti-elf/gcc/final/gcc/crtend.o /local/home/sellcey/nightly/obj-mips-mti-elf/gcc/final/gcc/crtn.o -T mti32.ld /local/home/sellcey/nightly/install-mips-mti-elf/mips-mti-elf/bin/ld: cannot find crt0.o collect2: error: ld returned 1 exit status If I run the compiler from the installed location, everything is fine: % install-mips-mti-elf/bin/mips-mti-elf-gcc -v x.c -Tmti32.ld -o x /local/home/sellcey/nightly/install-mips-mti-elf/libexec/gcc/mips-mti-elf/4.8.0/collect2 -EB -mips32r2 -melf32btsmip -o x /local/home/sellcey/nightly/install-mips-mti-elf/lib/gcc/mips-mti-elf/4.8.0/crti.o /local/home/sellcey/nightly/install-mips-mti-elf/lib/gcc/mips-mti-elf/4.8.0/crtbegin.o -L/local/home/sellcey/nightly/install-mips-mti-elf/lib/gcc/mips-mti-elf/4.8.0 -L/local/home/sellcey/nightly/install-mips-mti-elf/lib/gcc/mips-mti-elf/4.8.0/../../../../mips-mti-elf/lib /tmp/cczngIXe.o -lgcc -lgcc /local/home/sellcey/nightly/install-mips-mti-elf/lib/gcc/mips-mti-elf/4.8.0/crtend.o /local/home/sellcey/nightly/install-mips-mti-elf/lib/gcc/mips-mti-elf/4.8.0/crtn.o -T mti32.ld I am not sure how ld is supposed to find crt0.o in the uninstalled setup, it exists in obj-mips-mti-elf/newlib/mips-mti-elf/libgloss/mips. Maybe it should find it in the installed location, it is there because I have made and installed newlib before building and testing GCC. Steve Ellcey sell...@mips.com
