The use of libbacktrace in libgfortran exposed a libgfortran build issue on
hppa64-hp-hpux11.11.
This target doesn't have any __sync builtins, so we need to set
libbacktrace_cv_sys_sync to no
when with_target_subdir is set and configure tests are not done.
This exposed a compilation issue in elf.c which is fixed by a void cast.
Tested on hppa2.0w-hp-hpux11.11 and hppa64-hp-hpux11.11 with no observed
regressions.
Okay for trunk?
Regards,
Dave
--
John David Anglin dave.ang...@bell.net
2015-12-05 John David Anglin <dang...@gcc.gnu.org>
PR 68115/libfortran
* configure.ac: Set libbacktrace_cv_sys_sync to no on hppa*-*-hpux*.
* configure: Regenerate.
* elf.c (backtrace_initialize): Cast __sync_bool_compare_and_swap call
to void.
Index: configure.ac
===================================================================
--- configure.ac (revision 230990)
+++ configure.ac (working copy)
@@ -172,7 +172,10 @@
AC_CACHE_CHECK([__sync extensions],
[libbacktrace_cv_sys_sync],
[if test -n "${with_target_subdir}"; then
- libbacktrace_cv_sys_sync=yes
+ case "${host}" in
+ hppa*-*-hpux*) libbacktrace_cv_sys_sync=no ;;
+ *) libbacktrace_cv_sys_sync=yes ;;
+ esac
else
AC_LINK_IFELSE(
[AC_LANG_PROGRAM([int i;],
Index: elf.c
===================================================================
--- elf.c (revision 231044)
+++ elf.c (working copy)
@@ -955,7 +955,8 @@
if (found_sym)
backtrace_atomic_store_pointer (&state->syminfo_fn, elf_syminfo);
else
- __sync_bool_compare_and_swap (&state->syminfo_fn, NULL, elf_nosyms);
+ (void) __sync_bool_compare_and_swap (&state->syminfo_fn, NULL,
+ elf_nosyms);
}
if (!state->threaded)
