fix linking test lib

makefile.am

@@ -73,3 +73,6 @@ libcglm_la_SOURCES=\
     src/cglm-mat.c
 
 test_test_mat4_SOURCES=test/src/test_mat4.c
+
+all-local:
+	sh ./post-build.sh

post-build.sh

@@ -0,0 +1,19 @@
+#! /bin/sh
+#
+# Copyright (c), Recep Aslantas.
+#
+# MIT License (MIT), http://opensource.org/licenses/MIT
+# Full license can be found in the LICENSE file
+#
+
+cd $(dirname "$0")
+
+mkdir -p .libs
+
+if [ "$(uname)" = "Darwin" ]; then
+  ln -sf $(pwd)/test/lib/cmocka/build/src/libcmocka.0.dylib \
+      .libs/libcmocka.0.dylib;
+else
+  ln -sf $(pwd)/test/lib/cmocka/build/src/libcmocka.so.0 \
+      .libs/libcmocka.so.0;
+fi