Fix config check that claims to test if CXX supports -fvisibility=hidden option to...

Reviewed-by: Dan Nicholson <dbn.lists@gmail.com>
Signed-off-by: Jon TURNEY <jon.turney@dronecode.org.uk>

diff --git a/configure.ac b/configure.ac
index 0346a8ade676722fe081228dfe66ad3a6c22f39a..74357a2e24c9d7e63688865edb3afd28dbddd6bd 100644 (file)
--- a/configure.ac
+++ b/configure.ac
@@ -177,8 +177,10 @@ if test "x$GXX" = xyes; then
     AC_MSG_CHECKING([whether $CXX supports -fvisibility=hidden])
     VISIBILITY_CXXFLAGS="-fvisibility=hidden"
     CXXFLAGS="$CXXFLAGS $VISIBILITY_CXXFLAGS"
+    AC_LANG_PUSH([C++])
     AC_LINK_IFELSE([AC_LANG_PROGRAM()], AC_MSG_RESULT([yes]),
                   [VISIBILITY_CXXFLAGS="" ; AC_MSG_RESULT([no])]);
+    AC_LANG_POP([C++])
 
     # Restore CXXFLAGS; VISIBILITY_CXXFLAGS are added to it where needed.
     CXXFLAGS=$save_CXXFLAGS