X-Git-Url: https://www.tinc-vpn.org/git/browse?p=tinc;a=blobdiff_plain;f=m4%2Fzlib.m4;fp=m4%2Fzlib.m4;h=8407838a4d3b5aa6f8d219e68e61043c9e0da9ee;hp=0000000000000000000000000000000000000000;hb=d9a62c6354d1e2ad78ee8c610518ae9f9ab012d1;hpb=94b171b3051b999e619ae19e1c9c29d356606788

diff --git a/m4/zlib.m4 b/m4/zlib.m4
new file mode 100644
index 00000000..8407838a
--- /dev/null
+++ b/m4/zlib.m4
@@ -0,0 +1,31 @@
+dnl Check to find the zlib headers/libraries
+
+AC_DEFUN(tinc_ZLIB,
+[
+  tinc_ac_save_CPPFLAGS="$CPPFLAGS"
+
+  AC_ARG_WITH(zlib-include,
+    [  --with-zlib-include=DIR  zlib headers directory],
+    [zlib_include="$withval"
+     CFLAGS="$CFLAGS -I$withval"
+     CPPFLAGS="$CPPFLAGS -I$withval"]
+  )
+
+  AC_ARG_WITH(zlib-lib,
+    [  --with-zlib-lib=DIR  zlib library directory],
+    [zlib_lib="$withval"
+     LIBS="$LIBS -L$withval"]
+  )
+
+  AC_CHECK_HEADERS(zlib.h,
+    [],
+    [AC_MSG_ERROR("zlib header files not found."); break]
+  )
+
+  CPPFLAGS="$tinc_ac_save_CPPFLAGS"
+
+  AC_CHECK_LIB(z, compress2,
+    [LIBS="$LIBS -lz"],
+    [AC_MSG_ERROR("zlib libraries not found.")]
+  )
+])