added dependencies and build files (loosely inspired by Sebastian Dorda's love-native-android)

jni/libmng-1.0.10/contrib/gcc/sdl-mngplay/acinclude.m4

@@ -0,0 +1,34 @@
+dnl autoconf macros for detecting libmng
+dnl add this to your aclocal or acinclude to make use of it
+dnl
+dnl (c) 2000 Ralph Giles <giles@ashlu.bc.ca>
+dnl
+
+dnl A basic check: looks for libmng and its dependencies
+dnl and adds the required bits to CFLAGS and LIBS
+
+# check for libmng
+AC_DEFUN(LIBMNG_CHECK, [
+  dnl prerequisites first
+  AC_CHECK_LIB(jpeg, jpeg_set_defaults)
+  AC_CHECK_LIB(z, inflate)
+  dnl now the library
+  AC_CHECK_LIB(mng, mng_readdisplay, [_libmng_present=1])
+  AC_CHECK_HEADER(libmng.h)
+  dnl see if we need the optional link dependency
+  AC_CHECK_LIB(lcms, cmsCreateRGBProfile, [
+	AC_CHECK_HEADER(lcms.h)
+	AC_CHECK_LIB(mng, mnglcms_initlibrary, [
+		LIBS="$LIBS -llcms"
+		AC_DEFINE(HAVE_LIBLCMS)
+		_libmng_present=1
+	])
+  ])
+  if test $_libmng_present -eq 1; then
+	LIBS="-lmng $LIBS"
+	AC_DEFINE(HAVE_LIBMNG)
+  fi
+  _libmng_present=
+])
+
+dnl end LIBMNG macros