diff options
Diffstat (limited to 'config/unwind_ipinfo.m4')
| -rw-r--r-- | config/unwind_ipinfo.m4 | 41 |
1 files changed, 25 insertions, 16 deletions
diff --git a/config/unwind_ipinfo.m4 b/config/unwind_ipinfo.m4 index 5587d9c3f..a1dc6352b 100644 --- a/config/unwind_ipinfo.m4 +++ b/config/unwind_ipinfo.m4 @@ -1,22 +1,31 @@ dnl -dnl Check whether _Unwind_GetIPInfo is available. +dnl Check whether _Unwind_GetIPInfo is available without doing a link +dnl test so we can use this with libstdc++-v3 and libjava. Need to +dnl use $target to set defaults because automatic checking is not possible +dnl without a link test (and maybe even with a link test). dnl + AC_DEFUN([GCC_CHECK_UNWIND_GETIPINFO], [ - AC_LANG_SAVE - AC_LANG_CPLUSPLUS - ac_save_CXXFLAGS="$CXXFLAGS" - CXXFLAGS="$CXXFLAGS -fno-exceptions" - AC_MSG_CHECKING([for _Unwind_GetIPInfo]) - AC_CACHE_VAL(gcc_cv_getipinfo, [ - AC_TRY_LINK([extern "C" { extern void _Unwind_GetIPInfo(); }], - [_Unwind_GetIPInfo();], - [gcc_cv_getipinfo=yes], - [gcc_cv_getipinfo=no]) - ]) - if test $gcc_cv_getipinfo = yes; then + AC_ARG_WITH(system-libunwind, + [ --with-system-libunwind use installed libunwind]) + # If system-libunwind was not specifically set, pick a default setting. + if test x$with_system_libunwind = x; then + case ${target} in + ia64-*-hpux*) with_system_libunwind=yes ;; + *) with_system_libunwind=no ;; + esac + fi + # Based on system-libunwind and target, do we have ipinfo? + if test x$with_system_libunwind = xyes; then + case ${target} in + ia64-*-*) have_unwind_getipinfo=no ;; + *) have_unwind_getipinfo=yes ;; + esac + else + have_unwind_getipinfo=yes + fi + + if test x$have_unwind_getipinfo = xyes; then AC_DEFINE(HAVE_GETIPINFO, 1, [Define if _Unwind_GetIPInfo is available.]) fi - AC_MSG_RESULT($gcc_cv_getipinfo) - CXXFLAGS="$ac_save_CXXFLAGS" - AC_LANG_RESTORE ]) |