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-rw-r--r--config/ChangeLog4
-rw-r--r--config/zlib.m418
2 files changed, 22 insertions, 0 deletions
diff --git a/config/ChangeLog b/config/ChangeLog
index 7b6ded0..aa716ea 100644
--- a/config/ChangeLog
+++ b/config/ChangeLog
@@ -1,3 +1,7 @@
+2009-11-24 Joel Brobecker <brobecker@adacore.com>
+
+ * zlib.m4: New file.
+
2009-11-09 Jan Kratochvil <jan.kratochvil@redhat.com>
* largefile.m4 (ACX_LARGEFILE): Call AC_PLUGINS.
diff --git a/config/zlib.m4 b/config/zlib.m4
new file mode 100644
index 0000000..b017499
--- /dev/null
+++ b/config/zlib.m4
@@ -0,0 +1,18 @@
+dnl A function to check for zlib availability. zlib is used by default
+dnl unless the user configured with --disable-nls.
+
+AC_DEFUN([AM_ZLIB],
+[
+ # See if the user specified whether he wants zlib support or not.
+ AC_ARG_WITH(zlib,
+ [ --with-zlib include zlib support (auto/yes/no) [default=auto]],
+ [], [with_zlib=auto])
+
+ if test "$with_zlib" != "no"; then
+ AC_SEARCH_LIBS(zlibVersion, z, [AC_CHECK_HEADERS(zlib.h)])
+ if test "$with_zlib" = "yes" -a "$ac_cv_header_zlib_h" != "yes"; then
+ AC_MSG_ERROR([zlib (libz) library was explicitly requested but not found])
+ fi
+ fi
+])
+