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-rw-r--r--config/zlib.m418
1 files changed, 18 insertions, 0 deletions
diff --git a/config/zlib.m4 b/config/zlib.m4
new file mode 100644
index 000000000..b0174994e
--- /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
+])
+