A very vanilla build (just --prefix used and plain 'make' form gcc_objdir as I believe the build instruction are saying to do) ultimately fails like this: config.status: linking ../../../gcc-5.3.0/libgcc/gthr-posix.h to gthr-default.h config.status: executing default commands /home/bkerin/tmp/gcc_objdir/./gcc/xgcc -B/home/bkerin/tmp/gcc_objdir/./gcc/ -B/home/bkerin/opt/gcc-5.3.0/i686-pc-linux-gnu/bin/ -B/home/bkerin/opt/gcc-5.3.0/i686-pc-linux-gnu/lib/ -isystem /home/bkerin/opt/gcc-5.3.0/i686-pc-linux-gnu/include -isystem /home/bkerin/opt/gcc-5.3.0/i686-pc-linux-gnu/sys-include -g -O2 -O2 -g -O2 -DIN_GCC -W -Wall -Wno-narrowing -Wwrite-strings -Wcast-qual -Wno-format -Wstrict-prototypes -Wmissing-prototypes -Wold-style-definition -isystem ./include -fpic -mlong-double-80 -g -DIN_LIBGCC2 -fbuilding-libgcc -fno-stack-protector -fpic -mlong-double-80 -I. -I. -I../.././gcc -I../../../gcc-5.3.0/libgcc -I../../../gcc-5.3.0/libgcc/. -I../../../gcc-5.3.0/libgcc/../gcc -I../../../gcc-5.3.0/libgcc/../include -I../../../gcc-5.3.0/libgcc/config/libbid -DENABLE_DECIMAL_BID_FORMAT -DHAVE_CC_TLS -DUSE_TLS -o morestack.o -MT morestack.o -MD -MP -MF morestack.dep -c -xassembler-with-cpp -include .vis ../../../gcc-5.3.0/libgcc/config/i386/morestack.S cc1: fatal error: .vis: No such file or directory compilation terminated. make[3]: *** [morestack.o] Error 1 make[3]: Leaving directory `/home/bkerin/tmp/gcc_objdir/i686-pc-linux-gnu/libgcc' Anyone clues appreciated. Britton