ref: 808b78153c3d3bfe1fb692106323731d17e49489
dir: /acinclude.m4/
dnl Macro to check if autoconf's compile tests have been broken by dnl SDL. Tries to build the simplest possible program, and if it dnl fails, calls the given block. AC_DEFUN([AC_CHECK_SDL_BREAKAGE], [ AC_LINK_IFELSE(AC_LANG_PROGRAM([], []), [], [ $1 ]) ]) dnl Macro to work around SDL redefining main. The provided block dnl is run with main #defined to SDL_main via a compiler switch dnl if autoconf tests are found to be broken. AC_DEFUN([AC_SDL_MAIN_WORKAROUND], [ sdl_workaround_saved_CFLAGS="$CFLAGS" AC_CHECK_SDL_BREAKAGE([ CFLAGS="$CFLAGS -Dmain=SDL_main" ]) AC_CHECK_SDL_BREAKAGE([ AC_MSG_ERROR([Autoconf checks broken by SDL, and can't figure out how to fix them.]) ]) $1 CFLAGS="$sdl_workaround_saved_CFLAGS" ])