[Bug go/86535] FreeBSD/PowerPC64 - Building Go Frontend support for gcc 7.3.0 fails

[clhamilto at gmail dot com]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=86535

--- Comment #10 from Curtis Hamilton <clhamilto at gmail dot com> ---
Is it -fgo-dump-spec or -fdump-go-spec?  Below is an extract of my build log:

checking for hypotf... /usr/ports/lang/gcc7/work/.build/./gcc/xgcc
-B/usr/ports/lang/gcc7/work/.build/./gcc/
-B/usr/local/powerpc64-portbld-freebsd11.2/bin/
-B/usr/local/powerpc64-portbld-freebsd11.2/lib/ -isystem
/usr/local/powerpc64-portbld-freebsd11.2/include -isystem
/usr/local/powerpc64-portbld-freebsd11.2/sys-include    -DHAVE_CONFIG_H -I.
-I/usr/ports/lang/gcc7/work/gcc-7.3.0/libgo  -I
/usr/ports/lang/gcc7/work/gcc-7.3.0/libgo/runtime
-I/usr/ports/lang/gcc7/work/gcc-7.3.0/libgo/../libffi/include
-I../libffi/include -pthread  -D_GNU_SOURCE -D_LARGEFILE_SOURCE
-D_FILE_OFFSET_BITS=64 -O -fdump-go-spec=tmp-gen-sysinfo.go -std=gnu99 -S -o
sysinfo.s /usr/ports/lang/gcc7/work/gcc-7.3.0/libgo/sysinfo.c
yes
checking for hypot... rm -f sysinfo.s
/bin/sh /usr/ports/lang/gcc7/work/gcc-7.3.0/libgo/mvifdiff.sh
tmp-gen-sysinfo.go gen-sysinfo.go
echo timestamp > s-gen-sysinfo
rm -f libcalls.go.tmp
/usr/ports/lang/gcc7/work/gcc-7.3.0/libgo/../install-sh -c -d runtime/internal;
dir=`echo runtime/internal/sys.lo.dep | sed -e 's/.lo.dep$//'`; files=`/bin/sh
/usr/ports/lang/gcc7/work/gcc-7.3.0/libgo/match.sh --goarch=ppc64
--goos=freebsd --srcdir=/usr/ports/lang/gcc7/work/gcc-7.3.0/libgo/go/$dir
--extrafiles="version.go" `; /bin/sh
/usr/ports/lang/gcc7/work/gcc-7.3.0/libgo/godeps.sh `echo
runtime/internal/sys.lo.dep | sed -e 's/.dep$//'` $files >
runtime/internal/sys.lo.dep.tmp; if ! cmp runtime/internal/sys.lo.dep.tmp
runtime/internal/sys.lo.dep >/dev/null 2>/dev/null; then rm -f `echo
runtime/internal/sys.lo.dep | sed -e 's/\.dep$//'`; fi; mv -f
runtime/internal/sys.lo.dep.tmp runtime/internal/sys.lo.dep
/usr/bin/awk -f
/usr/ports/lang/gcc7/work/gcc-7.3.0/libgo/go/syscall/mksyscall.awk `cat
libcalls-list` > libcalls.go.tmp
/bin/sh /usr/ports/lang/gcc7/work/gcc-7.3.0/libgo/mksysinfo.sh
/bin/sh /usr/ports/lang/gcc7/work/gcc-7.3.0/libgo/mvifdiff.sh libcalls.go.tmp
libcalls.go
echo timestamp > s-libcalls
/bin/sh /usr/ports/lang/gcc7/work/gcc-7.3.0/libgo/mkrsysinfo.sh