* J.T. Conklin wrote on Sun, May 29, 2005 at 07:34:46PM CEST: > Does anyone have a macro for testing gcc's symbol visibility options > (-fvisibility=hidden, etc.)? The ACE/TAO autoconf scripts currently > checks for gcc/g++ >= 4.0, but that loses on non-ELF targets. I believe some Intel compilers support it as well. Why don't you temporarily add this to CFLAGS/CPPFLAGS and test whether the compiler barfs at the option? Note also that some compilers won't error out on unknown flags (esp Intel ones :) but only issue a warning. This may or may not matter for you. If it does: For example, Libtool-1.5.18 employs some trickery to find out the difference (see AC_LIBTOOL_COMPILER_OPTION in libtool.m4): compile a simple translation unit once without and once with the option and compare the warnings generated. BTW, if there is sufficient interest, I could try to make a macro like this for general use to Autoconf users (AC_LIBTOOL_COMPILER_OPTION is libtool-internal interface). Regards, Ralf _______________________________________________ Autoconf mailing list Autoconf@xxxxxxx http://lists.gnu.org/mailman/listinfo/autoconf
