* Furthermore, use NDEBUG globally to detect the presence
of building with more debug output information.
AX_CHECK_ENABLE_DEBUG is easier to use, and nowadays
Gnome has also switched to it from its own custom solution.
Signed-off-by: Erik de Castro Lopo <erikd@mega-nerd.com>
Autoconf detects the Clang compiler as GNU GCC (clang sets defines like
__GNUC__ etc) but Clang is *not* completely compatible. If we detect
Clang we set ac_vc_c_compiler_gnu to 'no'.
* Mac OS X has incomplete installations of gettext/iconv. So stop
checking for gettext command on Darwin, and install some additional m4
scripts so it can be bootstrapped on Mac OS X.
Signed-off-by: Erik de Castro Lopo <erikd@mega-nerd.com>
This option is disabled by default because it is known not to work
on FreeBSD 9.1 and for Linux -> Windows cross compiling using the
Debian MinGW-w64 tool chain.
It is known to work for native compiles in Debian testing and
OpenBSD 5.2.
Extra compile options are detected at configure time with new
XIPH_ADD_*FLAGS m4 macros.
Options enabled include -Wextra, -D_FORTIFY_SOURCE=2 and stack
protection.
