Allow to build zlib and lzma statically

This should fix issues on Darwin.

3rdparty/lzma/cbits/lzma_wrapper.c

@@ -0,0 +1,65 @@
+/*
+ * FFI wrappers for `lzma-streams`
+ *
+ * Copyright (c) 2014, Herbert Valerio Riedel <hvr@gnu.org>
+ *
+ * This code is BSD3 licensed, see ../LICENSE file for details
+ *
+ */
+
+#include <stdio.h>
+#include <string.h>
+#include <lzma.h>
+#include <HsFFI.h>
+
+HsInt
+hs_lzma_init_decoder(lzma_stream *ls, HsBool autolzma, uint64_t memlimit, uint32_t flags)
+{
+  /* recommended super-portable initialization */
+  const lzma_stream ls_init = LZMA_STREAM_INIT;
+  *ls = ls_init;
+
+  const lzma_ret ret = (autolzma ? lzma_auto_decoder : lzma_stream_decoder)(ls, memlimit, flags);
+
+  return ret;
+}
+
+HsInt
+hs_lzma_init_encoder(lzma_stream *ls, uint32_t preset, HsInt check)
+{
+  /* recommended super-portable initialization */
+  const lzma_stream ls_init = LZMA_STREAM_INIT;
+  *ls = ls_init;
+
+  const lzma_ret ret = lzma_easy_encoder(ls, preset, check);
+
+  return ret;
+}
+
+void
+hs_lzma_done(lzma_stream *ls)
+{
+  lzma_end(ls);
+}
+
+HsInt
+hs_lzma_run(lzma_stream *const ls, const HsInt action,
+            const uint8_t ibuf[], const HsInt ibuf_len,
+            uint8_t obuf[], const HsInt obuf_len)
+{
+  ls->next_in = ibuf;
+  ls->avail_in = ibuf_len;
+  ls->next_out = obuf;
+  ls->avail_out = obuf_len;
+
+  // paranoia
+  memset(obuf, 0, obuf_len);
+  
+  const lzma_ret ret = lzma_code(ls, action);
+
+  // paranoia
+  ls->next_in = NULL;
+  ls->next_out = NULL;
+
+  return ret;
+}