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libbacktrace: test linker support for DWARF 5

On AIX, the compiler supports DWARF 5 but the linker does not.

2020-07-07 Clement Chigot <clement.chigot@atos.net>

	* configure.ac: Test linker support for DWARF5
	* configure: Regenerate
lib
Ian Lance Taylor 2 years ago
parent
commit
aaa51b6dbe
  1. 12
      configure
  2. 4
      configure.ac

12
configure

@ -12678,13 +12678,21 @@ CFLAGS="$CFLAGS -gdwarf-5"
cat confdefs.h - <<_ACEOF >conftest.$ac_ext
/* end confdefs.h. */
int i;
int
main ()
{
return 0;
;
return 0;
}
_ACEOF
if ac_fn_c_try_compile "$LINENO"; then :
if ac_fn_c_try_link "$LINENO"; then :
libbacktrace_cv_lib_dwarf5=yes
else
libbacktrace_cv_lib_dwarf5=no
fi
rm -f core conftest.err conftest.$ac_objext conftest.$ac_ext
rm -f core conftest.err conftest.$ac_objext \
conftest$ac_exeext conftest.$ac_ext
CFLAGS=$CFLAGS_hold
fi
{ $as_echo "$as_me:${as_lineno-$LINENO}: result: $libbacktrace_cv_lib_dwarf5" >&5

4
configure.ac

@ -461,12 +461,12 @@ AC_SUBST(PTHREAD_CFLAGS)
AM_CONDITIONAL(HAVE_PTHREAD, test "$libgo_cv_lib_pthread" = yes)
dnl Test whether the compiler supports the -gdwarf-5 option.
dnl Test whether the compiler and the linker support the -gdwarf-5 option.
AC_CACHE_CHECK([whether -gdwarf-5 is supported],
[libbacktrace_cv_lib_dwarf5],
[CFLAGS_hold=$CFLAGS
CFLAGS="$CFLAGS -gdwarf-5"
AC_COMPILE_IFELSE([AC_LANG_SOURCE([int i;])],
AC_LINK_IFELSE([AC_LANG_PROGRAM([int i;], [return 0;])],
[libbacktrace_cv_lib_dwarf5=yes],
[libbacktrace_cv_lib_dwarf5=no])
CFLAGS=$CFLAGS_hold])

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