package fltk: portability patch for osx

autoconf already called in makefile

src/fltk-1-darwin-cross-compile.patch

@@ -0,0 +1,18 @@
+This file is part of mingw-cross-env.
+See doc/index.html for further information.
+
+This patch has been taken from:
+
+
+diff -ur fltk-1.3.x-r8659.orig/configure.in fltk-1.3.x-r8659/configure.in
+--- fltk-1.3.x-r8659.orig/configure.in	2011-03-07 03:54:58.000000000 +1100
++++ fltk-1.3.x-r8659/configure.in	2011-05-24 22:11:40.000000000 +1000
+@@ -34,7 +34,7 @@
+ AC_INIT(src/Fl.cxx)
+ 
+ dnl So --with-archflags option is used during "checking size of long"
+-if test `uname` = Darwin; then
++if test `uname` = Darwin && test "x$cross_compiling" = xno ; then
+   if test "x$with_archflags" != x ; then
+     CFLAGS="$CFLAGS $with_archflags"
+   fi