From 14f36162d26d52667d3717dd6dd2bb1e9ffdb166 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Vladim=C3=ADr=20=C4=8Cun=C3=A1t?= <vcunat@gmail.com>
Date: Sat, 1 Jun 2013 23:36:38 +0200
Subject: [PATCH] llvm: switch back to cmake build, so now clang builds

---
 pkgs/development/compilers/llvm/default.nix | 31 +++++++--------------
 pkgs/development/libraries/mesa/default.nix |  4 +--
 2 files changed, 12 insertions(+), 23 deletions(-)

diff --git a/pkgs/development/compilers/llvm/default.nix b/pkgs/development/compilers/llvm/default.nix
index 1e514884bb5..59e2bdc5509 100644
--- a/pkgs/development/compilers/llvm/default.nix
+++ b/pkgs/development/compilers/llvm/default.nix
@@ -1,4 +1,4 @@
-{ stdenv, fetchurl, perl, groff, cmake, python, libffi, libcxx }:
+{ stdenv, fetchurl, perl, groff, cmake, python, libffi }:
 
 let version = "3.2"; in
 
@@ -10,32 +10,21 @@ stdenv.mkDerivation {
     sha256 = "0hv30v5l4fkgyijs56sr1pbrlzgd674pg143x7az2h37sb290l0j";
   };
 
-  preConfigure = ''
-    patchShebangs .
-    export REQUIRES_RTTI=1
-  '';
-
-  # ToDo: polly, libc++; --enable-cxx11?
-
-  configureFlags = [
-    "--enable-shared" # saves half the size, and even more for e.g. mesa
-    "--disable-assertions" "--enable-optimized"
-    "--disable-timestamps" # embedding timestamps seems a danger to purity
-    "--enable-libffi"
-    #"--enable-experimental-targets=r600"
-    #"--enable-libcpp"
-  ] ;
-
   patches = [ ./set_soname.patch ]; # http://llvm.org/bugs/show_bug.cgi?id=12334
   patchFlags = "-p0";
 
-  buildInputs = [ perl groff python ]
-    #++ [ libcxx ]
-    ;
+  preConfigure = "patchShebangs .";
+
   propagatedBuildInputs = [ libffi ];
+  buildInputs = [ perl groff cmake python ]; # ToDo: polly, libc++; enable cxx11?
+
+  # created binaries need to be run before installation... I coudn't find a better way
+  preBuild = ''export LD_LIBRARY_PATH="$LD_LIBRARY_PATH:"`pwd`/lib'';
+
+  cmakeFlags = [ "-DCMAKE_BUILD_TYPE=Release" "-DBUILD_SHARED_LIBS=ON" ];
 
   enableParallelBuilding = true;
-  #ToDo: doCheck?
+  #doCheck = true; # tests are broken, don't know why
 
   meta = {
     homepage = http://llvm.org/;
diff --git a/pkgs/development/libraries/mesa/default.nix b/pkgs/development/libraries/mesa/default.nix
index a72d5d36ada..468e27de6ab 100644
--- a/pkgs/development/libraries/mesa/default.nix
+++ b/pkgs/development/libraries/mesa/default.nix
@@ -13,10 +13,10 @@ else
 
 /** Packaging design:
   - The basic mesa ($out) contains headers and libraries (GLU is in mesa_glu now).
-    This or the mesa attribute (which also contains GLU) are small (~ 2.5 MB, mostly headers)
+    This or the mesa attribute (which also contains GLU) are small (~ 2.2 MB, mostly headers)
     and are designed to be the buildInput of other packages.
   - DRI and EGL drivers are compiled into $drivers output,
-    which is bigger (~13 MB) and depends on LLVM (~80 MB).
+    which is bigger (~13 MB) and depends on LLVM (~40 MB).
     These should be searched at runtime in /run/current-system/sw/lib/*
     and so are kind-of impure (given by NixOS).
     (I suppose on non-NixOS one would create the appropriate symlinks from there.)