From 04c364d181cad9e0bd196885ee3e0f3bb139168d Mon Sep 17 00:00:00 2001
From: Eelco Dolstra <eelco.dolstra@logicblox.com>
Date: Wed, 18 Dec 2013 15:41:24 +0100
Subject: [PATCH] gnat: Attempt to fix random build failures

Sometimes the build failes with:

  In file included from ../../gcc-4.4.6/gcc/ada/seh_init.c:44:
  ../../gcc-4.4.6/gcc/system.h:418: error: conflicting types for 'strsignal'
  /nix/store/6h129q168ahnl2nzw6azr239cba884ng-glibc-2.18/include/string.h:560: note: previous declaration of 'strsignal' was here

and sometimes it doesn't.  Hopefully disabling parallel builds fixes
this.

http://hydra.nixos.org/build/7179481
---
 pkgs/development/compilers/gcc/4.4/default.nix | 2 +-
 pkgs/development/compilers/gcc/4.5/default.nix | 2 +-
 pkgs/development/compilers/gcc/4.6/default.nix | 2 +-
 3 files changed, 3 insertions(+), 3 deletions(-)

diff --git a/pkgs/development/compilers/gcc/4.4/default.nix b/pkgs/development/compilers/gcc/4.4/default.nix
index 60e7baa7781..3ecaf5cb5d2 100644
--- a/pkgs/development/compilers/gcc/4.4/default.nix
+++ b/pkgs/development/compilers/gcc/4.4/default.nix
@@ -246,7 +246,7 @@ stdenv.mkDerivation ({
       enableMultilib version; };
 
   # ghdl does not build fine with parallel building
-  enableParallelBuilding = !langVhdl;
+  enableParallelBuilding = !langVhdl && !langAda;
 
   meta = {
     homepage = http://gcc.gnu.org/;
diff --git a/pkgs/development/compilers/gcc/4.5/default.nix b/pkgs/development/compilers/gcc/4.5/default.nix
index cb0432b6672..e63ff7947f6 100644
--- a/pkgs/development/compilers/gcc/4.5/default.nix
+++ b/pkgs/development/compilers/gcc/4.5/default.nix
@@ -360,7 +360,7 @@ stdenv.mkDerivation ({
   passthru = { inherit langC langCC langAda langFortran langVhdl
       enableMultilib version; };
 
-  enableParallelBuilding = true;
+  enableParallelBuilding = !langAda;
 
   meta = {
     homepage = http://gcc.gnu.org/;
diff --git a/pkgs/development/compilers/gcc/4.6/default.nix b/pkgs/development/compilers/gcc/4.6/default.nix
index d7d9325ca4f..35255d0af5b 100644
--- a/pkgs/development/compilers/gcc/4.6/default.nix
+++ b/pkgs/development/compilers/gcc/4.6/default.nix
@@ -434,7 +434,7 @@ stdenv.mkDerivation ({
   passthru = { inherit langC langCC langAda langFortran langVhdl
       langGo version; };
 
-  enableParallelBuilding = true;
+  enableParallelBuilding = !langAda;
 
   inherit (stdenv) is64bit;