* Started reorganising stdenv:

  - gcc/ld-wrappers have been factored out into a separate
    derivation.  This allows a working gcc to be installed in the user
    environment.  (Previously the Nix gcc didn't work because it
    needed a whole bunch of flags to point to glibc.)
    
  - Better modularity: packages can specify hooks into the setup
    scripts.  For instance, setup no longer knows about the
    PKG_CONFIG_PATH variable; pkgconfig can set it up instead.

  - gcc not longer depends on binutils.  This simplifies the bootstrap
    process.

svn path=/nixpkgs/trunk/; revision=816

1 files changed, 28 insertions, 0 deletions

diff --git a/pkgs/build-support/gcc-wrapper/ld-wrapper.sh b/pkgs/build-support/gcc-wrapper/ld-wrapper.sh
new file mode 100644
index 0000000000000..2201bbe19d234
--- /dev/null
+++ b/pkgs/build-support/gcc-wrapper/ld-wrapper.sh
@@ -0,0 +1,28 @@
+#! /bin/sh
+
+if test -n "$NIX_LD_WRAPPER_START_HOOK"; then
+    . "$NIX_LD_WRAPPER_START_HOOK"
+fi
+
+extra=()
+
+if test -z "$NIX_LDFLAGS_SET"; then
+    extra=(${extra[@]} $NIX_LDFLAGS)
+fi
+
+if test "$NIX_DEBUG" = "1"; then
+  echo "original flags to @ld@:" >&2
+  for i in "$@"; do
+      echo "  $i" >&2
+  done
+  echo "extra flags to @ld@:" >&2
+  for i in ${extra[@]}; do
+      echo "  $i" >&2
+  done
+fi
+
+if test -n "$NIX_LD_WRAPPER_EXEC_HOOK"; then
+    . "$NIX_LD_WRAPPER_EXEC_HOOK"
+fi
+
+exec @ld@ "$@" ${extra[@]}