From 63abc2ed86acfc39022d7674ccee66663a3451b8 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Ludovic=20Court=C3=A8s?= <ludo@gnu.org>
Date: Wed, 19 May 2010 21:32:19 +0000
Subject: [PATCH] GCC 4.5: Add support for a separate libpthread; rearrange
 target flags handling.

svn path=/nixpkgs/trunk/; revision=21905
---
 pkgs/development/compilers/gcc-4.5/builder.sh | 19 +++++++------------
 .../development/compilers/gcc-4.5/default.nix | 19 +++++++++++++++++--
 pkgs/top-level/all-packages.nix               |  8 +++++++-
 3 files changed, 31 insertions(+), 15 deletions(-)

diff --git a/pkgs/development/compilers/gcc-4.5/builder.sh b/pkgs/development/compilers/gcc-4.5/builder.sh
index be2a2b11c167..6c3ced85d754 100644
--- a/pkgs/development/compilers/gcc-4.5/builder.sh
+++ b/pkgs/development/compilers/gcc-4.5/builder.sh
@@ -54,14 +54,9 @@ if test "$noSysDirs" = "1"; then
         EXTRA_LDFLAGS="$EXTRA_LDFLAGS -Wl,$i"
     done
 
-    if test -n "$targetConfig"; then
-        if test -z "$crossStageStatic" -o -n "$crossMingw"; then
-            EXTRA_FLAGS_TARGET="-g0 -O2 -B${libcCross}/lib -idirafter ${libcCross}/include"
-            EXTRA_LDFLAGS_TARGET="-Wl,-L${libcCross}/lib"
-        fi
-    else
-        EXTRA_FLAGS_TARGET="$EXTRA_FLAGS"
-        EXTRA_LDFLAGS_TARGET="$EXTRA_LDFLAGS"
+    if test -z "$targetConfig"; then
+        EXTRA_TARGET_CFLAGS="$EXTRA_FLAGS"
+        EXTRA_TARGET_LDFLAGS="$EXTRA_LDFLAGS"
     fi
 
     # CFLAGS_FOR_TARGET are needed for the libstdc++ configure script to find
@@ -73,17 +68,17 @@ if test "$noSysDirs" = "1"; then
         NATIVE_SYSTEM_HEADER_DIR="$NIX_FIXINC_DUMMY" \
         SYSTEM_HEADER_DIR="$NIX_FIXINC_DUMMY" \
         CFLAGS_FOR_BUILD="$EXTRA_FLAGS $EXTRA_LDFLAGS" \
-        CFLAGS_FOR_TARGET="$EXTRA_FLAGS_TARGET $EXTRA_LDFLAGS_TARGET" \
-        FLAGS_FOR_TARGET="$EXTRA_FLAGS_TARGET $EXTRA_LDFLAGS_TARGET" \
+        CFLAGS_FOR_TARGET="$EXTRA_TARGET_CFLAGS" \
+        FLAGS_FOR_TARGET="$EXTRA_TARGET_CFLAGS $EXTRA_TARGET_LDFLAGS" \
         LDFLAGS_FOR_BUILD="$EXTRA_FLAGS $EXTRA_LDFLAGS" \
-        LDFLAGS_FOR_TARGET="$EXTRA_FLAGS_TARGET $EXTRA_LDFLAGS_TARGET" \
+        LDFLAGS_FOR_TARGET="$EXTRA_TARGET_LDFLAGS" \
         )
 
     if test -z "$targetConfig"; then
         makeFlagsArray=( \
             "${makeFlagsArray[@]}" \
             BOOT_CFLAGS="$EXTRA_FLAGS $EXTRA_LDFLAGS" \
-            BOOT_LDFLAGS="$EXTRA_FLAGS_TARGET $EXTRA_LDFLAGS_TARGET" \
+            BOOT_LDFLAGS="$EXTRA_FLAGS $EXTRA_LDFLAGS" \
             )
     fi
 
diff --git a/pkgs/development/compilers/gcc-4.5/default.nix b/pkgs/development/compilers/gcc-4.5/default.nix
index 8ec79d7c43d9..f5e4c67761e9 100644
--- a/pkgs/development/compilers/gcc-4.5/default.nix
+++ b/pkgs/development/compilers/gcc-4.5/default.nix
@@ -24,6 +24,7 @@
 , libcCross ? null
 , crossStageStatic ? true
 , gnat ? null
+, libpthread ? null, libpthreadCross ? null  # required for GNU/Hurd
 }:
 
 assert langTreelang -> bison != null && flex != null;
@@ -212,15 +213,29 @@ stdenv.mkDerivation ({
                                   (optionals (zlib != null) [ zlib ]
                                    ++ optionals langJava [ boehmgc ]
                                    ++ optionals javaAwtGtk xlibs
-                                   ++ optionals javaAwtGtk [ gmp mpfr ])));
+                                   ++ optionals javaAwtGtk [ gmp mpfr ]
+                                   ++ optional (libpthread != null) libpthread
+                                   ++ optional (libpthreadCross != null) libpthreadCross)));
 
   LIBRARY_PATH = concatStrings
                    (intersperse ":" (map (x: x + "/lib")
                                          (optionals (zlib != null) [ zlib ]
                                           ++ optionals langJava [ boehmgc ]
                                           ++ optionals javaAwtGtk xlibs
-                                          ++ optionals javaAwtGtk [ gmp mpfr ])));
+                                          ++ optionals javaAwtGtk [ gmp mpfr ]
+                                          ++ optional (libpthread != null) libpthread)));
 
+  EXTRA_TARGET_CFLAGS =
+    if cross != null && libcCross != null
+    then "-g0 -O2 -idirafter ${libcCross}/include"
+    else null;
+
+  EXTRA_TARGET_LDFLAGS =
+    if cross != null && libcCross != null
+    then "-B${libcCross}/lib -Wl,-L${libcCross}/lib" +
+         (optionalString (libpthreadCross != null)
+           " -L${libpthreadCross}/lib ${libpthreadCross.TARGET_LDFLAGS}")
+    else null;
 
   passthru = { inherit langC langCC langAda langFortran langTreelang langVhdl
       enableMultilib; };
diff --git a/pkgs/top-level/all-packages.nix b/pkgs/top-level/all-packages.nix
index 61da353a7c7a..0d87a3c09877 100644
--- a/pkgs/top-level/all-packages.nix
+++ b/pkgs/top-level/all-packages.nix
@@ -2103,7 +2103,13 @@ let
   };
 
   gccCrossStageFinal = wrapGCCCross {
-    gcc = forceBuildDrv gcc_realCross;
+    gcc = forceBuildDrv (gcc_realCross.override {
+      libpthreadCross =
+        # FIXME: Don't explicitly refer to `i586-pc-gnu'.
+        if crossSystem != null && crossSystem.config == "i586-pc-gnu"
+        then hurdLibpthreadCross
+        else null;
+     });
     libc = libcCross;
     binutils = binutilsCross;
     cross = assert crossSystem != null; crossSystem;