From 2e2a17a92a8cf42114733ac1030aaba2d18f2a28 Mon Sep 17 00:00:00 2001
From: Peter Simons <simons@cryp.to>
Date: Tue, 23 Oct 2012 18:46:09 +0200
Subject: [PATCH] bison: drop obsolete version 1.875

---
 .../development/tools/parsing/bison/bison-1.875.nix | 13 -------------
 .../parsing/bison/{bison-2.6.nix => default.nix}    |  0
 pkgs/top-level/all-packages.nix                     |  6 +-----
 3 files changed, 1 insertion(+), 18 deletions(-)
 delete mode 100644 pkgs/development/tools/parsing/bison/bison-1.875.nix
 rename pkgs/development/tools/parsing/bison/{bison-2.6.nix => default.nix} (100%)

diff --git a/pkgs/development/tools/parsing/bison/bison-1.875.nix b/pkgs/development/tools/parsing/bison/bison-1.875.nix
deleted file mode 100644
index 3ee12a252cec..000000000000
--- a/pkgs/development/tools/parsing/bison/bison-1.875.nix
+++ /dev/null
@@ -1,13 +0,0 @@
-{stdenv, fetchurl, m4}:
-
-assert m4 != null;
-
-stdenv.mkDerivation {
-  name = "bison-1.875";
-  src = fetchurl {
-    url = mirror://gnu/bison/bison-1.875.tar.bz2;
-    md5 = "b7f8027b249ebd4dd0cc948943a71af0";
-  };
-  buildInputs = [m4];
-  passthru = { glrSupport = true; };
-}
diff --git a/pkgs/development/tools/parsing/bison/bison-2.6.nix b/pkgs/development/tools/parsing/bison/default.nix
similarity index 100%
rename from pkgs/development/tools/parsing/bison/bison-2.6.nix
rename to pkgs/development/tools/parsing/bison/default.nix
diff --git a/pkgs/top-level/all-packages.nix b/pkgs/top-level/all-packages.nix
index b6037799ac0f..e26da54f6a8b 100644
--- a/pkgs/top-level/all-packages.nix
+++ b/pkgs/top-level/all-packages.nix
@@ -2937,11 +2937,7 @@ let
     cross = assert crossSystem != null; crossSystem;
   });
 
-  bison = bison26;
-
-  bison1875 = callPackage ../development/tools/parsing/bison/bison-1.875.nix { };
-
-  bison26 = callPackage ../development/tools/parsing/bison/bison-2.6.nix { };
+  bison = callPackage ../development/tools/parsing/bison { };
 
   buildbot = callPackage ../development/tools/build-managers/buildbot {
     inherit (pythonPackages) twisted;