diff options
Diffstat (limited to 'tclap-1.2.1/config/ac_cxx_warn_effective_cxx.m4')
| -rw-r--r-- | tclap-1.2.1/config/ac_cxx_warn_effective_cxx.m4 | 31 |
1 files changed, 31 insertions, 0 deletions
diff --git a/tclap-1.2.1/config/ac_cxx_warn_effective_cxx.m4 b/tclap-1.2.1/config/ac_cxx_warn_effective_cxx.m4 new file mode 100644 index 0000000..317ad1d --- /dev/null +++ b/tclap-1.2.1/config/ac_cxx_warn_effective_cxx.m4 @@ -0,0 +1,31 @@ +dnl HAVE_WARN_EFFECTIVE_CXX +dnl ---------------------- +dnl +dnl If the C++ compiler accepts the `-Weffc++' flag, +dnl set output variable `WARN_EFFECTIVE_CXX' to `-Weffc++' and +dnl `WARN_NO_EFFECTIVE_CXX' to `-Wno-effc++'. Otherwise, +dnl leave both empty. +dnl +AC_DEFUN([HAVE_WARN_EFFECTIVE_CXX], +[ +AC_REQUIRE([AC_PROG_CXX]) +AC_MSG_CHECKING([whether the C++ compiler (${CXX}) accepts -Weffc++]) +AC_CACHE_VAL([cv_warn_effective_cxx], +[ +AC_LANG_SAVE +AC_LANG_CPLUSPLUS +save_cxxflags="$CXXFLAGS" +CXXFLAGS="$CXXFLAGS -Weffc++" +AC_TRY_COMPILE([],[main();], +[cv_warn_effective_cxx=yes], [cv_warn_effective_cxx=no]) +CXXFLAGS="$save_cxxflags" +AC_LANG_RESTORE +]) +AC_MSG_RESULT([$cv_warn_effective_cxx]) +if test "$cv_warn_effective_cxx" = yes; then + WARN_EFFECTIVE_CXX=-Weffc++ + WARN_NO_EFFECTIVE_CXX=-Wno-effc++ +fi +AC_SUBST([WARN_EFFECTIVE_CXX]) +AC_SUBST([WARN_NO_EFFECTIVE_CXX]) +]) |