https://gcc.gnu.org/bugzilla/show_bug.cgi?id=64919
--- Comment #29 from The Written Word <bugzilla-gcc at thewrittenword dot com> --- (In reply to Alexander from comment #28) > this one file should recompile with -O1 optimization Thanks. I rebuilt with charset.c with -O1 and it compiled. I resumed the build and the compile now fails with: /opt/build/china/gcc-4.9.3/.obj/./prev-gcc/xg++ -B/opt/build/china/gcc-4.9.3/.obj/./prev-gcc/ -B/opt/build/gcc49/ia64-hp-hpux11.31/bin/ -nostdinc++ -B/opt/build/china/gcc-4.9.3/.obj/prev-ia64-hp-hpux11.31/libstdc++-v3/src/.libs -B/opt/build/china/gcc-4.9.3/.obj/prev-ia64-hp-hpux11.31/libstdc++-v3/libsupc++/.libs -I/opt/build/china/gcc-4.9.3/.obj/prev-ia64-hp-hpux11.31/libstdc++-v3/include/ia64-hp-hpux11.31 -I/opt/build/china/gcc-4.9.3/.obj/prev-ia64-hp-hpux11.31/libstdc++-v3/include -I/opt/build/china/gcc-4.9.3/libstdc++-v3/libsupc++ -L/opt/build/china/gcc-4.9.3/.obj/prev-ia64-hp-hpux11.31/libstdc++-v3/src/.libs -L/opt/build/china/gcc-4.9.3/.obj/prev-ia64-hp-hpux11.31/libstdc++-v3/libsupc++/.libs -c -DUSE_LIBUNWIND_EXCEPTIONS -DIN_GCC_FRONTEND -g -O2 -DIN_GCC -fno-exceptions -fno-rtti -fasynchronous-unwind-tables -W -Wall -Wno-narrowing -Wwrite-strings -Wcast-qual -Wmissing-format-attribute -pedantic -Wno-long-long -Wno-variadic-macros -Wno-overlength-strings -DHAVE_CONFIG_H -I. -Ifortran -I/opt/build/china/gcc-4.9.3/gcc -I/opt/build/china/gcc-4.9.3/gcc/fortran -I/opt/build/china/gcc-4.9.3/gcc/../include -I./../intl -I/opt/build/china/gcc-4.9.3/gcc/../libcpp/include -I/opt/TWWfsw/libgmp51/include -I/opt/TWWfsw/libmpfr31/include -I/opt/TWWfsw/libmpc10/include -I/opt/build/china/gcc-4.9.3/gcc/../libdecnumber -I/opt/build/china/gcc-4.9.3/gcc/../libdecnumber/dpd -I../libdecnumber -I/opt/build/china/gcc-4.9.3/gcc/../libbacktrace -o fortran/scanner.o -MT fortran/scanner.o -MMD -MP -MF fortran/.deps/scanner.TPo /opt/build/china/gcc-4.9.3/gcc/fortran/scanner.c /opt/build/china/gcc-4.9.3/gcc/fortran/scanner.c: In function 'const char* gfc_read_orig_filename(const char*, const char**)': /opt/build/china/gcc-4.9.3/gcc/fortran/scanner.c:2220:1: internal compiler error: in plus_constant, at explow.c:87 } ^