Add (guix zlib).

* guix/zlib.scm, tests/zlib.scm: New files.
* Makefile.am (MODULES): Add guix/zlib.scm.
(SCM_TESTS): Add tests/zlib.scm.
* m4/guix.m4 (GUIX_LIBGCRYPT_LIBDIR): New macro.
* configure.ac (LIBGCRYPT_LIBDIR): Use it.  Define and substitute
'LIBZ'.
* guix/config.scm.in (%libz): New variable.

1 files changed, 11 insertions, 0 deletions

diff --git a/m4/guix.m4 b/m4/guix.m4
index 2d3dfd282ec..a4f83f029ab 100644
--- a/m4/guix.m4
+++ b/m4/guix.m4
@@ -308,6 +308,17 @@ AC_DEFUN([GUIX_LIBGCRYPT_LIBDIR], [
   $1="$guix_cv_libgcrypt_libdir"
 ])
 
+dnl GUIX_LIBZ_LIBDIR VAR
+dnl
+dnl Attempt to determine libz's LIBDIR; store the result in VAR.
+AC_DEFUN([GUIX_LIBZ_LIBDIR], [
+  AC_REQUIRE([PKG_PROG_PKG_CONFIG])
+  AC_CACHE_CHECK([zlib's library directory],
+    [guix_cv_libz_libdir],
+    [guix_cv_libz_libdir="`$PKG_CONFIG zlib --variable=libdir 2> /dev/null`"])
+  $1="$guix_cv_libz_libdir"
+])
+
 dnl GUIX_CURRENT_LOCALSTATEDIR
 dnl
 dnl Determine the localstatedir of an existing Guix installation and set