https://gcc.gnu.org/bugzilla/show_bug.cgi?id=81883
Bug ID: 81883 Summary: bootstrap-lto build fails with undefined reference to `_Unwind_Resume' Product: gcc Version: lto Status: UNCONFIRMED Severity: normal Priority: P3 Component: bootstrap Assignee: unassigned at gcc dot gnu.org Reporter: t at sharklasers dot com Target Milestone: --- Created attachment 41999 --> https://gcc.gnu.org/bugzilla/attachment.cgi?id=41999&action=edit Output of a sequential make run for context I compiled gcc-7.2 without LTO optimizations and tried to compile it again with bootstrap-lto using the new gcc-7.2 compiler. System: Linux 4.4.0-91-generic #114-Ubuntu SMP x86_64 GNU/Linux $ gcc -v Using built-in specs. COLLECT_GCC=gcc COLLECT_LTO_WRAPPER=gcc-7.2.0/libexec/gcc/x86_64-pc-linux-gnu/7.2.0/lto-wrapper Target: x86_64-pc-linux-gnu Configured with: gcc-7.2.0/configure --prefix=gcc-7.2.0 --enable-languages=c,c++,fortran --enable-gold=yes --enable-ld=yes --enable-bootstrap --disable-multilib Thread model: posix gcc version 7.2.0 (GCC) $ env | grep -i flags LDFLAGS=-O3 -flto=4 -fuse-linker-plugin CXXFLAGS=-march=native -O3 -flto -fno-fat-lto-objects -fuse-linker-plugin CFLAGS=-march=native -O3 -flto -fno-fat-lto-objects -fuse-linker-plugin $ ld -v GNU ld (GNU Binutils) 2.29 GCC tools were used export AR=gcc-ar export NM=gcc-nm export RANLIB=gcc-ranlib The bootstrap-lto build was configured with: gcc-7.2.0/configure --prefix=gcc-7.2.0 --enable-languages=c,c++,fortran --enable-gold=yes --enable-ld=yes --enable-bootstrap --with-build-config=bootstrap-lto --disable-multilib make[3]: Entering directory 'gccbuild/gcc' gccbuild/./prev-gcc/xg++ -Bgccbuild/./prev-gcc/ -Bgcc-7.2.0/x86_64-pc-linux-gnu/bin/ -nostdinc++ -Bgccbuild/prev-x86_64-pc-linux-gnu/libstdc++-v3/src/.libs -Bgccbuild/prev-x86_64-pc-linux-gnu/libstdc++-v3/libsupc++/.libs -Igccbuild/prev-x86_64-pc-linux-gnu/libstdc++-v3/include/x86_64-pc-linux-gnu -Igccbuild/prev-x86_64-pc-linux-gnu/libstdc++-v3/include -Igcc-7.2.0/libstdc++-v3/libsupc++ -Lgccbuild/prev-x86_64-pc-linux-gnu/libstdc++-v3/src/.libs -Lgccbuild/prev-x86_64-pc-linux-gnu/libstdc++-v3/libsupc++/.libs -g -O2 -flto=jobserver -frandom-seed=1 -DIN_GCC -fno-exceptions -fno-rtti -fasynchronous-unwind-tables -W -Wall -Wno-narrowing -Wwrite-strings -Wcast-qual -Wmissing-format-attribute -Woverloaded-virtual -pedantic -Wno-long-long -Wno-variadic-macros -Wno-overlength-strings -DHAVE_CONFIG_H -DGENERATOR_FILE -fno-PIE -static-libstdc++ -static-libgcc -no-pie -o build/genmddeps \ build/genmddeps.o build/read-md.o build/errors.o .././libiberty/libiberty.a binutils-2.29/x86_64-pc-linux-gnu/bin/ld: error in /tmp/ccK67upk.ltrans0.ltrans.o(.eh_frame); no .eh_frame_hdr table will be created. /tmp/ccK67upk.ltrans0.ltrans.o: In function `__verbose_terminate_handler': gcc-7.2.0/libstdc++-v3/libsupc++/vterminate.cc:82: undefined reference to `_Unwind_Resume' collect2: error: ld returned 1 exit status Makefile:2791: recipe for target 'build/genmddeps' failed make[3]: *** [build/genmddeps] Error 1 make[3]: Leaving directory 'gccbuild/gcc' Makefile:4596: recipe for target 'all-stage2-gcc' failed make[2]: *** [all-stage2-gcc] Error 2 make[2]: Leaving directory 'gccbuild' Makefile:26888: recipe for target 'stage2-bubble' failed make[1]: *** [stage2-bubble] Error 2 make[1]: Leaving directory 'gccbuild' Makefile:941: recipe for target 'all' failed make: *** [all] Error 2