Comment 3 for bug 1862053

I have now investigated further, by trying to compile the pre-processed *.i source file. This naturally does not need any -D... and -I... command line arguments.

So I started with this command line:

gcc -c gdevpdfb.i

which did well. Then I added from the full command line each bunch of arguments which are not -D... or -I...:

gcc -fPIC -O2 -fPIC -Wdate-time -c gdevpdfb.i

gcc -fPIC -O2 -Wdate-time -Wall -Wstrict-prototypes -Wundef -Wmissing-declarations -Wmissing-prototypes -Wwrite-strings -fno-strict-aliasing -Werror=declaration-after-statement -fno-builtin -fno-common -Werror=return-type -c gdevpdfb.i

gcc -fPIC -O2 -Wdate-time -Wall -Wstrict-prototypes -Wundef -Wmissing-declarations -Wmissing-prototypes -Wwrite-strings -fno-strict-aliasing -Werror=declaration-after-statement -fno-builtin -fno-common -Werror=return-type -g -O3 -fdebug-prefix-map=`pwd`=. -fstack-protector-strong -Wformat -Werror=format-security -c gdevpdfb.i

and at the last of these it hung again, So I tried to remove arguments and saw -O3 as a good candidate, and, yes, removing it made gcc finish. Seems that -O3 is the culprit!

So let us try the complete command line but without -O3:

gcc -fPIC -O2 -Wdate-time -Wall -Wstrict-prototypes -Wundef -Wmissing-declarations -Wmissing-prototypes -Wwrite-strings -fno-strict-aliasing -Werror=declaration-after-statement -fno-builtin -fno-common -Werror=return-type -g -fdebug-prefix-map=`pwd`=. -fstack-protector-strong -Wformat -Werror=format-security -fno-strict-aliasing -o gdevpdfb.o -c gdevpdfb.i

This also completes.

And back into the ghostscript source tree to do the whole thing:

gcc -save-temps -DHAVE_MKSTEMP -DHAVE_FILE64 -DHAVE_FSEEKO -DHAVE_MKSTEMP64 -DHAVE_FONTCONFIG -DHAVE_LIBIDN -DHAVE_SETLOCALE -DHAVE_BSWAP32 -DHAVE_BYTESWAP_H -DHAVE_STRERROR -DHAVE_ISNAN -DHAVE_ISINF -DHAVE_PREAD_PWRITE=1 -DGS_RECURSIVE_MUTEXATTR=PTHREAD_MUTEX_RECURSIVE -fPIC -O2 -fPIC -Wdate-time -D_FORTIFY_SOURCE=2 -Wall -Wstrict-prototypes -Wundef -Wmissing-declarations -Wmissing-prototypes -Wwrite-strings -fno-strict-aliasing -Werror=declaration-after-statement -fno-builtin -fno-common -Werror=return-type -DHAVE_STDINT_H=1 -DHAVE_DIRENT_H=1 -DHAVE_SYS_DIR_H=1 -DHAVE_SYS_TIME_H=1 -DHAVE_SYS_TIMES_H=1 -DHAVE_INTTYPES_H=1 -DHAVE_LIBDL=1 -DGX_COLOR_INDEX_TYPE="unsigned long long" -D__USE_UNIX98=1 -g -fdebug-prefix-map=/home/ubuntu/ubuntu/ghostscript/ghostscript-9.50~dfsg=. -fstack-protector-strong -Wformat -Werror=format-security -DHAVE_RESTRICT=1 -DUSE_LIBPAPER -I/usr/include/powerpc64le-linux-gnu -fno-strict-aliasing -DHAVE_POPEN_PROTO=1 -DGS_DEVS_SHARED -DGS_DEVS_SHARED_DIR=\"/usr/lib/ghostscript/9.50\" -I./soobj -I./base -I./soobj -I./devices -I./devices/vector -o ./soobj/gdevpdfb.o -c ./devices/vector/gdevpdfb.c

but without -O3, this also works.

So the workaround is not using -O3 on ppc64el, but the bug is still there. gcc needs to get fixed.