When a C++ compiler is not found, then AC_PROG_CXX will set CXX to 'false'.
However, we test that we can find $CXX, and indeed false exists in the PATH, for virtually all systems we have a chance to be compiled on. So we conclude that we do have a C++ compiler, when this is clearly wrong. Improve our hack by trying to run the C++ compiler with a benign call, that should succeed if the CXX is really a C++ compiler: tell it to dump its pre-defined macros. Signed-off-by: "Yann E. MORIN" <[email protected]> Reviewed-by: Peter Hutterer <[email protected]> --- Changes v1 -> v2: - fix typo in commit log (Peter) --- Note: this is not a replacement for the patch I sent earlier [0]. It is complementary. --- configure.ac | 10 +++++----- 1 file changed, 5 insertions(+), 5 deletions(-) diff --git a/configure.ac b/configure.ac index 738d744..8b022c1 100644 --- a/configure.ac +++ b/configure.ac @@ -33,11 +33,11 @@ AM_PROG_AS # check if we have C++ compiler. This is hacky workaround, # for a reason why it is this way see # http://lists.gnu.org/archive/html/bug-autoconf/2010-05/msg00001.html -have_cpp_compiler=yes - -if ! which "$CXX" &>/dev/null; then - have_cpp_compiler=no -fi +AS_IF([! which "$CXX" &>/dev/null]; + [have_cpp_compiler=no], + [AS_IF([! $CXX -dM -E - < /dev/null >/dev/null], + [have_cpp_compiler=no], + [have_cpp_compiler=yes])]) AM_CONDITIONAL(ENABLE_CPP_TEST, test "x$have_cpp_compiler" = "xyes") -- 2.7.4 _______________________________________________ wayland-devel mailing list [email protected] https://lists.freedesktop.org/mailman/listinfo/wayland-devel
