Making lynx, yacas and alsa-lib crossbuild

svn path=/nixpkgs/branches/stdenv-updates/; revision=23130

pkgs/applications/networking/browsers/lynx/default.nix

@@ -15,6 +15,7 @@ stdenv.mkDerivation {
   configureFlags = if sslSupport then "--with-ssl" else "";
   
   buildInputs = [ ncurses ] ++ stdenv.lib.optional sslSupport openssl;
+  buildNativeInputs = [ ncurses ];
 
   meta = {
     homepage = http://lynx.isc.org/;

pkgs/applications/science/math/yacas/default.nix

@@ -9,10 +9,29 @@ stdenv.mkDerivation rec {
   };
 
   # Perl is only for the documentation
-  buildInputs = [ perl ];
+  buildNativeInputs = [ perl ];
 
   patches = [ ./gcc43.patch ];
 
+  crossAttrs = {
+    # Trick to get host-built programs needed for the cross-build.
+    # If yacas had proper makefiles, this would not be needed.
+    preConfigure = ''
+      ./configure
+      pushd src
+      make mkfastprimes 
+      cp mkfastprimes ../..
+      popd
+      pushd manmake
+      make manripper removeduplicates
+      cp manripper removeduplicates ../..
+      popd
+    '';
+    preBuild = ''
+      cp ../mkfastprimes ../manripper ../removeduplicates src
+    '';
+  };
+
   meta = { 
       description = "Easy to use, general purpose Computer Algebra System";
       homepage = http://yacas.sourceforge.net/;

pkgs/os-specific/linux/alsa-lib/default.nix

@@ -14,6 +14,12 @@ stdenv.mkDerivation rec {
   postPatch = ''
     sed -i -e 's|//int snd_pcm_mixer_element(snd_pcm_t \*pcm, snd_mixer_t \*mixer, snd_mixer_elem_t \*\*elem);|/\*int snd_pcm_mixer_element(snd_pcm_t \*pcm, snd_mixer_t \*mixer, snd_mixer_elem_t \*\*elem);\*/|' include/pcm.h
   '';
+
+  crossAttrs = {
+    patchPhase = ''
+      sed -i s/extern/static/g include/iatomic.h
+    '';
+  };
   
   meta = {
     description = "ALSA, the Advanced Linux Sound Architecture libraries";