build cdecl on darwin

pkgs/development/tools/cdecl/cdecl-2.5-lex.patch

@@ -0,0 +1,13 @@
+diff --git a/Makefile b/Makefile
+index 1643b74..8f1ae11 100644
+--- a/Makefile
++++ b/Makefile
+@@ -33,7 +33,7 @@ c++decl: cdgram.c cdlex.c cdecl.c
+ 	rm -f cdecl
+ 
+ cdlex.c: cdlex.l
+-	lex cdlex.l && mv lex.yy.c cdlex.c
++	flex cdlex.l && mv lex.yy.c cdlex.c
+ 
+ cdgram.c: cdgram.y
+ 	yacc cdgram.y && mv y.tab.c cdgram.c

pkgs/development/tools/cdecl/default.nix

@@ -1,22 +1,25 @@
-{stdenv, fetchurl, yacc, flex, readline, ncurses}:
+{stdenv, fetchurl, yacc, flex, readline, ncurses, gnused}:
 
 stdenv.mkDerivation {
   name = "cdecl-2.5";
   src = fetchurl {
-    url = ftp://metalab.unc.edu/pub/linux/devel/lang/c/cdecl-2.5.tar.gz;
-    md5 = "29895dab52e85b2474a59449e07b7996";
+    url = "http://cdecl.org/files/cdecl-blocks-2.5.tar.gz";
+    md5 = "c1927e146975b1c7524cbaf07a7c10f8";
   };
 
-  patches = [ ./cdecl-2.5-implicit-pointer.patch ./cdecl-2.5.patch ./cdecl-2.5-gentoo.patch ];
-  preBuild = "
-    makeFlags=\"PREFIX=$out\"
-  ";
+  patches = [ ./cdecl-2.5-lex.patch ];
+  preBuild = ''
+    ${gnused}/bin/sed 's/getline/cdecl_getline/g' -i cdecl.c;
+    makeFlagsArray=(CFLAGS="-DBSD -DUSE_READLINE -std=gnu89" LIBS=-lreadline);
+    makeFlags="$makeFlags PREFIX=$out BINDIR=$out/bin MANDIR=$out/man1 CATDIR=$out/cat1";
+    mkdir -p $out/bin;
+  '';
   buildInputs = [yacc flex readline ncurses];
 
   meta = {
     description = "Translator English -- C/C++ declarations";
     license = "Public Domain";
     maintainers = with stdenv.lib.maintainers; [viric];
-    platforms = with stdenv.lib.platforms; linux;
+    # platforms = with stdenv.lib.platforms; linux;
   };
 }