From 82b608d93f1c7138230846d7db7a26e26b14f420 Mon Sep 17 00:00:00 2001
From: "Yury G. Kudryashov" <urkud.urkud@gmail.com>
Date: Mon, 1 Oct 2007 15:07:55 +0000
Subject: [PATCH] Added optional unicode support to pcre. Building old
 (non-unicode) package by default.

svn path=/nixpkgs/trunk/; revision=9386
---
 pkgs/development/libraries/pcre/default.nix | 9 +++++++--
 pkgs/top-level/all-packages.nix             | 6 ++++++
 2 files changed, 13 insertions(+), 2 deletions(-)

diff --git a/pkgs/development/libraries/pcre/default.nix b/pkgs/development/libraries/pcre/default.nix
index cef6ae627ea..1b4d7fc9093 100644
--- a/pkgs/development/libraries/pcre/default.nix
+++ b/pkgs/development/libraries/pcre/default.nix
@@ -1,9 +1,14 @@
-{stdenv, fetchurl}:
+args: with args;
 
-stdenv.mkDerivation {
+stdenv.mkDerivation ({
   name = "pcre-7.1";
   src = fetchurl {
     url = ftp://ftp.csx.cam.ac.uk/pub/software/programming/pcre/pcre-7.1.tar.bz2;
     sha256 = "0rpkcw07jas3fw6ava3ni5zcrmbncwa8xlsa0lzq6z2iph5510li";
   };
 }
+// (if unicodeSupport then
+{
+  configureFlags = "--enable-unicode-properties --enable-shared --disable-static";
+}
+else {}))
diff --git a/pkgs/top-level/all-packages.nix b/pkgs/top-level/all-packages.nix
index d91d79b03fd..1f0539690d9 100644
--- a/pkgs/top-level/all-packages.nix
+++ b/pkgs/top-level/all-packages.nix
@@ -146,6 +146,11 @@ rec {
   getVersion = name: alts: builtins.getAttr
     (getConfig [ "environment" "versions" name ] "default") alts;
 
+  # Whether user enabled given feature for the given package?
+  getFlag = flag: package: default:
+  getConfig [ "environment" "flags" package flag ]
+  (getConfig [ "environment" "flags" "default" flag ] default);
+
   # The contents of the configuration file found at $NIXPKGS_CONFIG or
   # $HOME/.nixpkgs/config.nix.
   config =
@@ -1930,6 +1935,7 @@ rec {
 
   pcre = import ../development/libraries/pcre {
     inherit fetchurl stdenv;
+    unicodeSupport = getFlag "unicode" "pcre" false;
   };
 
   popt = import ../development/libraries/popt {