ref: 03b33adb70a04b543804f3e4d428a1ccc795fba6
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])