diff options
Diffstat (limited to 'libstdc++-v3/acinclude.m4')
| -rw-r--r-- | libstdc++-v3/acinclude.m4 | 73 |
1 files changed, 0 insertions, 73 deletions
diff --git a/libstdc++-v3/acinclude.m4 b/libstdc++-v3/acinclude.m4 index 6f67774..46e303c 100644 --- a/libstdc++-v3/acinclude.m4 +++ b/libstdc++-v3/acinclude.m4 @@ -3129,79 +3129,6 @@ EOF dnl -dnl Check for exception handling support. If an explicit enable/disable -dnl sjlj exceptions is given, we don't have to detect. Otherwise the -dnl target may or may not support call frame exceptions. -dnl -dnl --enable-sjlj-exceptions forces the use of builtin setjmp. -dnl --disable-sjlj-exceptions forces the use of call frame unwinding. -dnl Neither one forces an attempt at detection. -dnl -dnl Defines: -dnl _GLIBCXX_SJLJ_EXCEPTIONS if the compiler is configured for it -dnl -AC_DEFUN([GLIBCXX_ENABLE_SJLJ_EXCEPTIONS], [ - AC_MSG_CHECKING([for exception model to use]) - AC_LANG_SAVE - AC_LANG_CPLUSPLUS - GLIBCXX_ENABLE(sjlj-exceptions,auto,, - [force use of builtin_setjmp for exceptions], - [permit yes|no|auto]) - - if test $enable_sjlj_exceptions = auto; then - # Botheration. Now we've got to detect the exception model. Link tests - # against libgcc.a are problematic since we've not been given proper -L - # bits for single-tree newlib and libgloss. - # - # Fake what AC_TRY_COMPILE does. XXX Look at redoing this new-style. - cat > conftest.$ac_ext << EOF -[#]line __oline__ "configure" -struct S { ~S(); }; -void bar(); -void foo() -{ - S s; - bar(); -} -EOF - old_CXXFLAGS="$CXXFLAGS" - CXXFLAGS=-S - if AC_TRY_EVAL(ac_compile); then - if grep _Unwind_SjLj_Resume conftest.s >/dev/null 2>&1 ; then - enable_sjlj_exceptions=yes - elif grep _Unwind_SjLj_Register conftest.s >/dev/null 2>&1 ; then - enable_sjlj_exceptions=yes - elif grep _Unwind_Resume conftest.s >/dev/null 2>&1 ; then - enable_sjlj_exceptions=no - elif grep __cxa_end_cleanup conftest.s >/dev/null 2>&1 ; then - enable_sjlj_exceptions=no - fi - fi - CXXFLAGS="$old_CXXFLAGS" - rm -f conftest* - fi - - # This is a tad weird, for hysterical raisins. We have to map - # enable/disable to two different models. - case $enable_sjlj_exceptions in - yes) - AC_DEFINE(_GLIBCXX_SJLJ_EXCEPTIONS, 1, - [Define if the compiler is configured for setjmp/longjmp exceptions.]) - ac_exception_model_name=sjlj - ;; - no) - ac_exception_model_name="call frame" - ;; - *) - AC_MSG_ERROR([unable to detect exception model]) - ;; - esac - AC_LANG_RESTORE - AC_MSG_RESULT($ac_exception_model_name) -]) - - -dnl dnl Allow visibility attributes to be used on namespaces, objects, etc. dnl dnl --enable-libstdcxx-visibility enables attempt to use visibility attributes. |