diff options
Diffstat (limited to 'm4/add_cxxflags.m4')
| -rw-r--r-- | m4/add_cxxflags.m4 | 16 |
1 files changed, 16 insertions, 0 deletions
diff --git a/m4/add_cxxflags.m4 b/m4/add_cxxflags.m4 new file mode 100644 index 0000000..b76e710 --- /dev/null +++ b/m4/add_cxxflags.m4 @@ -0,0 +1,16 @@ +dnl @synopsis XIPH_ADD_CXXFLAGS +dnl +dnl Add the given option to CXXFLAGS, if it doesn't break the compiler + +AC_DEFUN([XIPH_ADD_CXXFLAGS], +[AC_MSG_CHECKING([if $CXX accepts $1]) + AC_LANG_ASSERT([C++]) + ac_add_cxxflags__old_cxxflags="$CXXFLAGS" + CXXFLAGS="$1" + AC_LINK_IFELSE([AC_LANG_PROGRAM([[ + #include <cstdio> + ]], [[puts("Hello, World!"); return 0;]])],[AC_MSG_RESULT(yes) + CXXFLAGS="$ac_add_cxxflags__old_cxxflags $1"],[AC_MSG_RESULT(no) + CXXFLAGS="$ac_add_cxxflags__old_cxxflags" + ]) +])# XIPH_ADD_CXXFLAGS |