[Bug bootstrap/64919] bootstrap failure of gcc-4.9.2 on ia64-hpux in libgcc

["bugzilla-gcc at thewrittenword dot com" <gcc-bugzilla at gcc dot gnu dot org>]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=64919

--- Comment #30 from The Written Word <bugzilla-gcc at thewrittenword dot com> ---
(In reply to The Written Word from comment #29)
> (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
>  }
>  ^

Rebuilding with -O0 or with no optimization specified worked around this. Is
that what others have done?