From 586b6d4d45bfbf684a7a4299934d371b8b287665 Mon Sep 17 00:00:00 2001
From: David Thompson <dthompson@member.fsf.org>
Date: Wed, 30 Apr 2014 20:35:45 -0400
Subject: [PATCH] gnu: Propagate necessary inputs for sdl-image.

* gnu/packages/sdl.scm (sdl-image): Propagate jpeg, png, and tiff
  libraries.
---
 gnu/packages/sdl.scm | 15 ++++++++++-----
 1 file changed, 10 insertions(+), 5 deletions(-)

diff --git a/gnu/packages/sdl.scm b/gnu/packages/sdl.scm
index d86ecde38e..bbf8597c7a 100644
--- a/gnu/packages/sdl.scm
+++ b/gnu/packages/sdl.scm
@@ -147,12 +147,17 @@ (define sdl-image
               (base32
                "16an9slbb8ci7d89wakkmyfvp7c0cval8xw4hkg0842nhhlp540b"))))
     (build-system gnu-build-system)
+    (native-inputs `(("pkg-config" ,pkg-config)))
     ;; FIXME: Add webp
-    (inputs `(("libpng" ,libpng)
-              ("libjpeg" ,libjpeg)
-              ("libtiff" ,libtiff)
-              ("pkg-config" ,pkg-config)))
-    (propagated-inputs `(("sdl" ,sdl)))
+    ;;
+    ;; libjpeg, libpng, and libtiff are propagated inputs because the
+    ;; SDL_image headers include the headers of these libraries.  SDL is a
+    ;; propagated input because the pkg-config file refers to SDL's pkg-config
+    ;; file.
+    (propagated-inputs `(("sdl" ,sdl)
+                         ("libjpeg" ,libjpeg)
+                         ("libpng" ,libpng)
+                         ("libtiff" ,libtiff)))
     (synopsis "SDL image loading library")
     (description "SDL_image is an image file loading library for SDL that
 supports the following formats: BMP, GIF, JPEG, LBM, PCX, PNG, PNM, TGA, TIFF,