1 files changed, 30 insertions, 0 deletions
diff --git a/pkgs/development/tools/parsing/flex/default.nix b/pkgs/development/tools/parsing/flex/default.nix
new file mode 100644
index 000000000000..57ce29f51753
--- /dev/null
+++ b/pkgs/development/tools/parsing/flex/default.nix
@@ -0,0 +1,30 @@
+{ stdenv, fetchurl, bison, m4 }:
+
+stdenv.mkDerivation rec {
+  name = "flex-2.6.0";
+
+  src = fetchurl {
+    url = "mirror://sourceforge/flex/${name}.tar.bz2";
+    sha256 = "1sdqx63yadindzafrq1w31ajblf9gl1c301g068s20s7bbpi3ri4";
+  };
+
+  buildInputs = [ bison ];
+
+  propagatedNativeBuildInputs = [ m4 ];
+
+  postConfigure = stdenv.lib.optionalString (stdenv.isDarwin || stdenv.isCygwin) ''
+    sed -i Makefile -e 's/-no-undefined//;'
+  '';
+
+  crossAttrs = {
+    preConfigure = ''
+      export ac_cv_func_malloc_0_nonnull=yes
+      export ac_cv_func_realloc_0_nonnull=yes
+    '';
+  };
+
+  meta = {
+    homepage = http://flex.sourceforge.net/;
+    description = "A fast lexical analyser generator";
+  };
+}