From 5f11c6009fba7ad635987a839d5769c4d9ca8f29 Mon Sep 17 00:00:00 2001
From: Christopher Baines <mail@cbaines.net>
Date: Tue, 20 Oct 2020 12:32:28 +0100
Subject: Update configure.ac for zlib and lzlib dependencies

---
 configure.ac | 11 +++++++++++
 1 file changed, 11 insertions(+)

diff --git a/configure.ac b/configure.ac
index 73c6ffb..313cecc 100644
--- a/configure.ac
+++ b/configure.ac
@@ -20,6 +20,17 @@ AC_PATH_PROG([sqlite3], [sqlite3])
 AC_PATH_PROG([psql], [psql])
 AC_PATH_PROG([bzip2], [bzip2])
 
+dnl Check for Guile-zlib.
+GUILE_MODULE_AVAILABLE([have_guile_zlib], [(zlib)])
+if test "x$have_guile_zlib" != "xyes"; then
+  AC_MSG_ERROR([Guile-zlib is missing; please install it.])
+fi
+
+dnl Check for Guile-lzlib.
+GUILE_MODULE_AVAILABLE([have_guile_lzlib], [(lzlib)])
+if test "x$have_guile_lzlib" != "xyes"; then
+  AC_MSG_ERROR([Guile-lzlib is missing; please install it.])
+fi
 
 AC_CONFIG_FILES([Makefile])
 AC_CONFIG_FILES([pre-inst-env], [chmod +x pre-inst-env])
-- 
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