ref: f06884b2a35a45459fb594d2bf0a2ae611f0589c
dir: /external/SDL2/acinclude/ac_check_define.m4/
AC_DEFUN([AC_CHECK_DEFINE],[dnl AC_CACHE_CHECK(for $1 in $2, ac_cv_define_$1, AC_EGREP_CPP([YES_IS_DEFINED], [ #include <$2> #ifdef $1 YES_IS_DEFINED #endif ], ac_cv_define_$1=yes, ac_cv_define_$1=no) ) if test "$ac_cv_define_$1" = "yes" ; then AC_DEFINE([HAVE_$1],[],[Added by AC_CHECK_DEFINE]) fi ])dnl AC_DEFINE([HAVE_$1],[],[Added by AC_CHECK_DEFINE])