* Make the grep call optional.

svn path=/nixpkgs/trunk/; revision=3330

maintainers/docs/todo.txt

@@ -1,5 +1,3 @@
-* Bump freetype to 2.1.7 (but it breaks Pango 1.2.5).
-
 * Patch development/tools/misc/libtool not to search standard
   directories for libraries (like setup.sh does now). [do we want
   this?]
@@ -10,3 +8,6 @@
 
 * After building gcc, filter out references to /tmp/nix... in
   .../lib/libsupc++.la and .../lib/libstdc++.la
+
+* In libxml2: python2.3 -> python2.4 (or even better, make this
+  generic; also in bittorrent).

pkgs/build-support/gcc-wrapper/gcc-wrapper.sh

@@ -116,6 +116,10 @@ fi
 # Call the real `gcc'.  Filter out warnings from stderr about unused
 # `-B' flags, since they confuse some programs.  Deep bash magic to
 # apply grep to stderr (by swapping stdin/stderr twice).
-(@gccProg@ ${extraBefore[@]} "${params[@]}" ${extraAfter[@]} 3>&2 2>&1 1>&3- \
-    | (grep -v 'file path prefix' || true); exit ${PIPESTATUS[0]}) 3>&2 2>&1 1>&3-
-exit $?
+if test -z "$NIX_GCC_NEEDS_GREP"; then
+    @gccProg@ ${extraBefore[@]} "${params[@]}" ${extraAfter[@]}
+else
+    (@gccProg@ ${extraBefore[@]} "${params[@]}" ${extraAfter[@]} 3>&2 2>&1 1>&3- \
+        | (grep -v 'file path prefix' || true); exit ${PIPESTATUS[0]}) 3>&2 2>&1 1>&3-
+    exit $?
+fi    

pkgs/stdenv/freebsd/prehook.sh

@@ -2,3 +2,6 @@ export NIX_ENFORCE_PURITY=
 alias make=gmake
 export MAKE=gmake
 shopt -s expand_aliases
+
+# Filter out stupid GCC warnings (in gcc-wrapper).
+export NIX_GCC_NEEDS_GREP=1