New formula: nettle 2.3

Nettle is yet another crypto library. The GnuTLS 3.x series requires it.

Includes an alias for 'libnettle'.

Signed-off-by: Jack Nagel <jacknagel@gmail.com>

Aliases/libnettle

@@ -0,0 +1 @@
+../Formula/nettle.rb

Formula/nettle.rb

@@ -0,0 +1,41 @@
+require 'formula'
+
+class Nettle < Formula
+  url 'http://www.lysator.liu.se/~nisse/archive/nettle-2.3.tar.gz'
+  homepage 'http://www.lysator.liu.se/~nisse/nettle/'
+  md5 'ba66035af27731307229fd39efa51c0d'
+
+  depends_on 'gmp'
+
+  # Fix undefined symbols when linking
+  def patches; DATA; end
+
+  def install
+    ENV.universal_binary
+    ENV.append 'LDFLAGS', '-lgmp' # Fix undefined symbols when linking
+    ENV['DYLD_LIBRARY_PATH'] = lib # otherwise 'make check' fails
+
+    system "./configure", "--disable-dependency-tracking",
+                          "--prefix=#{prefix}",
+                          "--enable-shared",
+                          "--disable-assembler"
+    system "make"
+    system "make install"
+    system "make check"
+  end
+end
+
+__END__
+diff --git a/Makefile.in b/Makefile.in
+index fd486f5..227ccd9 100644
+--- a/Makefile.in
++++ b/Makefile.in
+@@ -163,7 +163,7 @@ $(LIBNETTLE_FORLINK): $(nettle_PURE_OBJS)
+           && ln -sf ../$(LIBNETTLE_FORLINK) $(LIBNETTLE_SONAME))
+ 
+ $(LIBHOGWEED_FORLINK): $(hogweed_PURE_OBJS) $(LIBNETTLE_FORLINK)
+-	$(LIBHOGWEED_LINK) $(hogweed_PURE_OBJS) -o $@ $(LIBHOGWEED_LIBS)
++	$(LIBHOGWEED_LINK) $(hogweed_PURE_OBJS) $(nettle_PURE_OBJS) -o $@ $(LIBHOGWEED_LIBS)
+ 	-mkdir .lib 2>/dev/null
+ 	[ -z "$(LIBHOGWEED_SONAME)" ] || (cd .lib \
+           && ln -sf ../$(LIBHOGWEED_FORLINK) $(LIBHOGWEED_SONAME))