From b90289dadc8ee15848ce911a2bdcd3ae8302d58c Mon Sep 17 00:00:00 2001
From: Marius Bakke <mbakke@fastmail.com>
Date: Mon, 30 Jul 2018 17:09:07 +0200
Subject: [PATCH] gnu: zlib: Move static library to separate output.

* gnu/packages/compression.scm (zlib)[outputs]: New field.
[arguments]: Add phase 'move-static-library'.
---
 gnu/packages/compression.scm | 11 ++++++++++-
 1 file changed, 10 insertions(+), 1 deletion(-)

diff --git a/gnu/packages/compression.scm b/gnu/packages/compression.scm
index fdfa5ce39b..c206fd8664 100644
--- a/gnu/packages/compression.scm
+++ b/gnu/packages/compression.scm
@@ -85,6 +85,7 @@ (define-public zlib
        (base32
         "18dighcs333gsvajvvgqp8l4cx7h1x7yx9gd5xacnk80spyykrf3"))))
     (build-system gnu-build-system)
+    (outputs '("out" "static"))
     (arguments
      `(#:phases
        (modify-phases %standard-phases
@@ -99,7 +100,15 @@ (define-public zlib
                      `((setenv "CHOST" ,(%current-target-system)))
                      '())
                (invoke "./configure"
-                       (string-append "--prefix=" out))))))))
+                       (string-append "--prefix=" out)))))
+         (add-after 'install 'move-static-library
+           (lambda* (#:key outputs #:allow-other-keys)
+             (let ((out (assoc-ref outputs "out"))
+                   (static (assoc-ref outputs "static")))
+               (with-directory-excursion (string-append out "/lib")
+                 (install-file "libz.a" (string-append static "/lib"))
+                 (delete-file "libz.a")
+                 #t)))))))
     (home-page "https://zlib.net/")
     (synopsis "Compression library")
     (description