diff -r c67921b517c3 -r 91063c450171 sdl.m4
--- a/sdl.m4	Mon May 01 07:15:35 2006 +0000
+++ b/sdl.m4	Mon May 01 07:23:46 2006 +0000
@@ -20,19 +20,21 @@
 		    , enable_sdltest=yes)
 
   if test x$sdl_exec_prefix != x ; then
-     sdl_args="$sdl_args --exec-prefix=$sdl_exec_prefix"
-     if test x${SDL_CONFIG+set} != xset ; then
-        SDL_CONFIG=$sdl_exec_prefix/bin/sdl-config
-     fi
+    sdl_args="$sdl_args --exec-prefix=$sdl_exec_prefix"
+    if test x${SDL_CONFIG+set} != xset ; then
+      SDL_CONFIG=$sdl_exec_prefix/bin/sdl-config
+    fi
   fi
   if test x$sdl_prefix != x ; then
-     sdl_args="$sdl_args --prefix=$sdl_prefix"
-     if test x${SDL_CONFIG+set} != xset ; then
-        SDL_CONFIG=$sdl_prefix/bin/sdl-config
-     fi
+    sdl_args="$sdl_args --prefix=$sdl_prefix"
+    if test x${SDL_CONFIG+set} != xset ; then
+      SDL_CONFIG=$sdl_prefix/bin/sdl-config
+    fi
   fi
 
-  PATH="$prefix/bin:$prefix/usr/bin:$PATH"
+  if test "x$prefix" != xNONE; then
+    PATH="$prefix/bin:$prefix/usr/bin:$PATH"
+  fi
   AC_PATH_PROG(SDL_CONFIG, sdl-config, no, [$PATH])
   min_sdl_version=ifelse([$1], ,0.11.0,$1)
   AC_MSG_CHECKING(for SDL - version >= $min_sdl_version)