From eb4584c0cbe9bb02dbb99afa025428ba35980a9d Mon Sep 17 00:00:00 2001
From: Eelco Dolstra <eelco.dolstra@logicblox.com>
Date: Thu, 26 Oct 2006 11:25:29 +0000
Subject: [PATCH] * Merge the gcc-4.1 changes into 3.4.

svn path=/nixpkgs/trunk/; revision=6855
---
 pkgs/development/compilers/gcc-3.4/builder.sh | 62 +++++++------------
 .../development/compilers/gcc-3.4/default.nix |  5 +-
 2 files changed, 26 insertions(+), 41 deletions(-)

diff --git a/pkgs/development/compilers/gcc-3.4/builder.sh b/pkgs/development/compilers/gcc-3.4/builder.sh
index 2ae98d17fbd..17b0e57f2f0 100644
--- a/pkgs/development/compilers/gcc-3.4/builder.sh
+++ b/pkgs/development/compilers/gcc-3.4/builder.sh
@@ -7,47 +7,31 @@ mkdir $NIX_FIXINC_DUMMY
 
 if test "$noSysDirs" = "1"; then
 
-    if test "$noSysDirs" = "1"; then
+    if test -e $NIX_GCC/nix-support/orig-libc; then
+
         # Figure out what extra flags to pass to the gcc compilers
         # being generated to make sure that they use our glibc.
-        if test -e $NIX_GCC/nix-support/orig-glibc; then
-            glibc=$(cat $NIX_GCC/nix-support/orig-glibc)
-            
-            # Ugh.  Copied from gcc-wrapper/builder.sh.  We can't just
-            # source in $NIX_GCC/nix-support/add-flags, since that
-            # would cause *this* GCC to be linked against the
-            # *previous* GCC.  Need some more modularity there.
-            extraCFlags="-B$glibc/lib -isystem $glibc/include"
-            extraLDFlags="-B$glibc/lib -L$glibc/lib -Wl,-s \
-              -Wl,-dynamic-linker,$glibc/lib/ld-linux.so.2"
+        extraCFlags="$(cat $NIX_GCC/nix-support/libc-cflags)"
+        extraLDFlags="$(cat $NIX_GCC/nix-support/libc-ldflags) $(cat $NIX_GCC/nix-support/libc-ldflags-before)"
 
-            # Oh, what a hack.  I should be shot for this.
-            # In stage 1, we should link against the previous GCC, but
-            # not afterwards.  Otherwise we retain a dependency.
-            # However, ld-wrapper, which adds the linker flags for the
-            # previous GCC, is also used in stage 2/3.  We can prevent
-            # it from adding them by NIX_GLIBC_FLAGS_SET, but then
-            # gcc-wrapper will also not add them, thereby causing
-            # stage 1 to fail.  So we use a trick to only set the
-            # flags in gcc-wrapper.
-            hook=$(pwd)/ld-wrapper-hook
-            echo "NIX_GLIBC_FLAGS_SET=1" > $hook
-            export NIX_LD_WRAPPER_START_HOOK=$hook
-
-            # Use *real* header files, otherwise a limits.h is
-            # generated that does not include Glibc's limits.h
-            # (notably missing SSIZE_MAX, which breaks the build).
-            export NIX_FIXINC_DUMMY=$glibc/include
-        fi
-
-        export NIX_EXTRA_CFLAGS=$extraCFlags
-        export NIX_EXTRA_LDFLAGS=$extraLDFlags
-        export CFLAGS=$extraCFlags
-        export LDFLAGS=$extraLDFlags
+        # Use *real* header files, otherwise a limits.h is generated
+        # that does not include Glibc's limits.h (notably missing
+        # SSIZE_MAX, which breaks the build).
+        export NIX_FIXINC_DUMMY=$(cat $NIX_GCC/nix-support/orig-libc)/include
+        
+    else
+        # Hack: support impure environments.
+        extraCFlags="-isystem /usr/include"
+        extraLDFlags="-L/usr/lib64 -L/usr/lib"
+        export NIX_FIXINC_DUMMY=/usr/include
     fi
 
-else
-    patches=""
+    export NIX_EXTRA_CFLAGS=$extraCFlags
+    for i in $extraLDFlags; do
+        export NIX_EXTRA_LDFLAGS="$NIX_EXTRA_LDFLAGS -Wl,$i"
+    done        
+    export CFLAGS=$extraCFlags
+    export CXXFLAGS=$extraCFlags
 fi
 
 
@@ -68,7 +52,7 @@ preConfigure() {
     cd ../build
 
     configureScript=../$sourceRoot/configure
-    configureFlags="--enable-languages=$langs"
+    configureFlags="--enable-languages=$langs $configureFlags"
 }
 
 
@@ -85,9 +69,9 @@ postInstall() {
 
 
 if test -z "$profiledCompiler"; then
-    makeFlags="bootstrap"
+    makeFlags="bootstrap $makeFlags"
 else    
-    makeFlags="profiledbootstrap"
+    makeFlags="profiledbootstrap $makeFlags"
 fi
 
 genericBuild
diff --git a/pkgs/development/compilers/gcc-3.4/default.nix b/pkgs/development/compilers/gcc-3.4/default.nix
index dbb6baf526a..3ceeb7b5d99 100644
--- a/pkgs/development/compilers/gcc-3.4/default.nix
+++ b/pkgs/development/compilers/gcc-3.4/default.nix
@@ -12,8 +12,9 @@ stdenv.mkDerivation {
     url = http://nix.cs.uu.nl/dist/tarballs/gcc-3.4.6.tar.bz2;
     md5 = "4a21ac777d4b5617283ce488b808da7b";
   };
-  # !!! apply only if noSysDirs is set
-  patches = [./no-sys-dirs.patch];
+
+  patches = if noSysDirs then [./no-sys-dirs.patch] else [];
+
   inherit noSysDirs langC langCC langF77 profiledCompiler;
 
   meta = {