1 files changed, 30 insertions, 0 deletions
diff --git a/pkgs/development/tools/parsing/flex/2.5.39.nix b/pkgs/development/tools/parsing/flex/2.5.39.nix
new file mode 100644
index 00000000000..f12f89f6e24
--- /dev/null
+++ b/pkgs/development/tools/parsing/flex/2.5.39.nix
@@ -0,0 +1,30 @@
+{ stdenv, fetchurl, bison, m4 }:
+
+stdenv.mkDerivation {
+  name = "flex-2.5.39";
+
+  src = fetchurl {
+    url = mirror://sourceforge/flex/flex-2.5.39.tar.bz2;
+    sha256 = "0zv15giw3gma03y2bzw78hjfy49vyir7vbcgnh9bb3637dgvblmd";
+  };
+
+  buildInputs = [ bison ];
+
+  propagatedNativeBuildInputs = [ m4 ];
+
+  postConfigure = stdenv.lib.optionalString stdenv.isDarwin ''
+    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";
+  };
+}