diff --git a/rocbuild.cmake b/rocbuild.cmake
index 8c951e5..33aeaaf 100644
--- a/rocbuild.cmake
+++ b/rocbuild.cmake
@@ -149,5 +149,16 @@ function(rocbuild_set_debug_postfix TARGET)
 endfunction()
 
 
+function(rocbuild_hide_symbols TARGET)
+  get_target_property(TARGET_TYPE ${TARGET} TYPE)
+  if(TARGET_TYPE STREQUAL "SHARED_LIBRARY")  
+    if((CMAKE_C_COMPILER_ID MATCHES "GNU|Clang") OR
+       (CMAKE_CXX_COMPILER_ID MATCHES "GNU|Clang"))
+      target_compile_options(${TARGET} PRIVATE "-fvisibility=hidden")
+    endif()
+  endif()
+endfunction()
+
+
 rocbuild_set_artifacts_path()
 rocbuild_enable_ninja_colorful_output()
\ No newline at end of file
diff --git a/test.py b/test.py
index cbbfed9..95227ca 100644
--- a/test.py
+++ b/test.py
@@ -49,111 +49,158 @@ def check_build(self, project_name, args=''):
         self.assertEqual(0, ret, out)
         return out.replace('\r\n', '\n')
 
-    def test_artifact_path(self):
-        if os_name == 'windows':
-            # determine if cl.exe is available
-            ret, out = check_output('cl')
-            if ret == 0:
-                self.check_generate('artifacts_path', args='-G "Ninja Multi-Config"')
-                self.check_build('artifacts_path', '--config Release')
-                self.assertTrue(os.path.exists('build/artifacts_path/Release/foo_static.lib'))
-                self.assertTrue(os.path.exists('build/artifacts_path/Release/foo_shared.dll'))
-                self.assertTrue(os.path.exists('build/artifacts_path/Release/hello.exe'))
-                self.assertTrue(os.path.exists('build/artifacts_path/Release/subfoo_static.lib'))
-                self.assertTrue(os.path.exists('build/artifacts_path/Release/subfoo_shared.dll'))
-                self.assertTrue(os.path.exists('build/artifacts_path/Release/subhello.exe'))
-                shutil.rmtree('build/artifacts_path')
-
-                self.check_generate('artifacts_path', args="-G Ninja")
-                self.check_build('artifacts_path', '--config Release')
-                self.assertTrue(os.path.exists('build/artifacts_path/foo_static.lib'))
-                self.assertTrue(os.path.exists('build/artifacts_path/foo_shared.dll'))
-                self.assertTrue(os.path.exists('build/artifacts_path/hello.exe'))
-                self.assertTrue(os.path.exists('build/artifacts_path/subfoo_static.lib'))
-                self.assertTrue(os.path.exists('build/artifacts_path/subfoo_shared.dll'))
-                self.assertTrue(os.path.exists('build/artifacts_path/subhello.exe'))
-                shutil.rmtree('build/artifacts_path')
-
-            self.check_generate('artifacts_path')
-            self.check_build('artifacts_path', '--config Release')
-            self.assertTrue(os.path.exists('build/artifacts_path/Release/foo_static.lib'))
-            self.assertTrue(os.path.exists('build/artifacts_path/Release/foo_shared.dll'))
-            self.assertTrue(os.path.exists('build/artifacts_path/Release/hello.exe'))
-            self.assertTrue(os.path.exists('build/artifacts_path/Release/subfoo_static.lib'))
-            self.assertTrue(os.path.exists('build/artifacts_path/Release/subfoo_shared.dll'))
-            self.assertTrue(os.path.exists('build/artifacts_path/Release/subhello.exe'))
-        elif os_name == 'linux':
-            self.check_generate('artifacts_path')
-            self.check_build('artifacts_path')
-            self.assertTrue(os.path.exists('build/artifacts_path/libfoo_static.a'))
-            self.assertTrue(os.path.exists('build/artifacts_path/libfoo_shared.so'))
-            self.assertTrue(os.path.exists('build/artifacts_path/hello'))
-            self.assertTrue(os.path.exists('build/artifacts_path/libsubfoo_static.a'))
-            self.assertTrue(os.path.exists('build/artifacts_path/libsubfoo_shared.so'))
-            self.assertTrue(os.path.exists('build/artifacts_path/subhello'))
+    # def test_artifact_path(self):
+    #     if os_name == 'windows':
+    #         # determine if cl.exe is available
+    #         ret, out = check_output('cl')
+    #         if ret == 0:
+    #             self.check_generate('artifacts_path', args='-G "Ninja Multi-Config"')
+    #             self.check_build('artifacts_path', '--config Release')
+    #             self.assertTrue(os.path.exists('build/artifacts_path/Release/foo_static.lib'))
+    #             self.assertTrue(os.path.exists('build/artifacts_path/Release/foo_shared.dll'))
+    #             self.assertTrue(os.path.exists('build/artifacts_path/Release/hello.exe'))
+    #             self.assertTrue(os.path.exists('build/artifacts_path/Release/subfoo_static.lib'))
+    #             self.assertTrue(os.path.exists('build/artifacts_path/Release/subfoo_shared.dll'))
+    #             self.assertTrue(os.path.exists('build/artifacts_path/Release/subhello.exe'))
+    #             shutil.rmtree('build/artifacts_path')
+
+    #             self.check_generate('artifacts_path', args="-G Ninja")
+    #             self.check_build('artifacts_path', '--config Release')
+    #             self.assertTrue(os.path.exists('build/artifacts_path/foo_static.lib'))
+    #             self.assertTrue(os.path.exists('build/artifacts_path/foo_shared.dll'))
+    #             self.assertTrue(os.path.exists('build/artifacts_path/hello.exe'))
+    #             self.assertTrue(os.path.exists('build/artifacts_path/subfoo_static.lib'))
+    #             self.assertTrue(os.path.exists('build/artifacts_path/subfoo_shared.dll'))
+    #             self.assertTrue(os.path.exists('build/artifacts_path/subhello.exe'))
+    #             shutil.rmtree('build/artifacts_path')
+
+    #         self.check_generate('artifacts_path')
+    #         self.check_build('artifacts_path', '--config Release')
+    #         self.assertTrue(os.path.exists('build/artifacts_path/Release/foo_static.lib'))
+    #         self.assertTrue(os.path.exists('build/artifacts_path/Release/foo_shared.dll'))
+    #         self.assertTrue(os.path.exists('build/artifacts_path/Release/hello.exe'))
+    #         self.assertTrue(os.path.exists('build/artifacts_path/Release/subfoo_static.lib'))
+    #         self.assertTrue(os.path.exists('build/artifacts_path/Release/subfoo_shared.dll'))
+    #         self.assertTrue(os.path.exists('build/artifacts_path/Release/subhello.exe'))
+    #     elif os_name == 'linux':
+    #         self.check_generate('artifacts_path')
+    #         self.check_build('artifacts_path')
+    #         self.assertTrue(os.path.exists('build/artifacts_path/libfoo_static.a'))
+    #         self.assertTrue(os.path.exists('build/artifacts_path/libfoo_shared.so'))
+    #         self.assertTrue(os.path.exists('build/artifacts_path/hello'))
+    #         self.assertTrue(os.path.exists('build/artifacts_path/libsubfoo_static.a'))
+    #         self.assertTrue(os.path.exists('build/artifacts_path/libsubfoo_shared.so'))
+    #         self.assertTrue(os.path.exists('build/artifacts_path/subhello'))
+    #     elif os_name == 'mac':
+    #         self.check_generate('artifacts_path')
+    #         self.check_build('artifacts_path')
+    #         self.assertTrue(os.path.exists('build/artifacts_path/libfoo_static.a'))
+    #         self.assertTrue(os.path.exists('build/artifacts_path/libfoo_shared.dylib'))
+    #         self.assertTrue(os.path.exists('build/artifacts_path/hello'))
+    #         self.assertTrue(os.path.exists('build/artifacts_path/libsubfoo_static.a'))
+    #         self.assertTrue(os.path.exists('build/artifacts_path/libsubfoo_shared.dylib'))
+    #         self.assertTrue(os.path.exists('build/artifacts_path/subhello'))
+
+    #     shutil.rmtree('build/artifacts_path')
+
+    # def test_debug_postfix(self):
+    #     if os_name == 'windows':
+    #         # msbuild
+    #         self.check_generate('debug_postfix')
+    #         self.check_build('debug_postfix', '--config Debug')
+    #         self.assertTrue(os.path.exists('build/debug_postfix/Debug/foo_d.lib'))
+    #         self.assertTrue(os.path.exists('build/debug_postfix/Debug/hello_d.exe'))
+    #         shutil.rmtree('build/debug_postfix')
+
+    #         ret, out = check_output('cl')
+    #         if ret == 0:
+    #             # ninja
+    #             self.check_generate('debug_postfix', args='-G Ninja')
+    #             self.check_build('debug_postfix')
+    #             self.assertTrue(os.path.exists('build/debug_postfix/foo.lib'))
+    #             self.assertTrue(os.path.exists('build/debug_postfix/hello.exe'))
+    #             shutil.rmtree('build/debug_postfix')
+
+    #             self.check_generate('debug_postfix', args='-G Ninja -DCMAKE_BUILD_TYPE=Debug')
+    #             self.check_build('debug_postfix')
+    #             self.assertTrue(os.path.exists('build/debug_postfix/foo.lib'))
+    #             self.assertTrue(os.path.exists('build/debug_postfix/hello.exe'))
+    #             shutil.rmtree('build/debug_postfix')
+
+    #             # Ninja Multi-Config
+    #             self.check_generate('debug_postfix', args='-G "Ninja Multi-Config"')
+    #             self.check_build('debug_postfix', '--config Debug')
+    #             self.assertTrue(os.path.exists('build/debug_postfix/Debug/foo_d.lib'))
+    #             self.assertTrue(os.path.exists('build/debug_postfix/Debug/hello_d.exe'))
+    #             shutil.rmtree('build/debug_postfix')
+    #     else:
+    #         # Ninja Multi-Config
+    #         self.check_generate('debug_postfix', args='-G "Ninja Multi-Config"')
+    #         self.check_build('debug_postfix')
+    #         self.assertTrue(os.path.exists('build/debug_postfix/Debug/libfoo_d.a'))
+    #         self.assertTrue(os.path.exists('build/debug_postfix/Debug/hello_d'))
+    #         shutil.rmtree('build/debug_postfix')
+
+    #         # make
+    #         self.check_generate('debug_postfix')
+    #         self.check_build('debug_postfix')
+    #         self.assertTrue(os.path.exists('build/debug_postfix/libfoo.a'))
+    #         self.assertTrue(os.path.exists('build/debug_postfix/hello'))
+    #         shutil.rmtree('build/debug_postfix')
+
+    #         self.check_generate('debug_postfix', args='-DCMAKE_BUILD_TYPE=Debug')
+    #         self.check_build('debug_postfix')
+    #         self.assertTrue(os.path.exists('build/debug_postfix/libfoo.a'))
+    #         self.assertTrue(os.path.exists('build/debug_postfix/hello'))
+    #         shutil.rmtree('build/debug_postfix')
+
+    def test_hide_symbols(self):
+        if os_name == 'linux':
+            self.check_generate('hide_symbols', args='-DHIDDEN=1')
+            self.check_build('hide_symbols')
+            cmd = 'nm -C build/hide_symbols/libbar.so | grep " T "'
+            ret, out = check_output(cmd)
+            self.assertEqual(0, ret, out)
+            out = out.replace('\r\n', '\n')
+            lines = out.strip().split('\n')
+            self.assertEqual(len(lines), 1, lines)
+            self.assertTrue(lines[0].endswith(' T bar'))
+            shutil.rmtree('build/hide_symbols')
+
+            self.check_generate('hide_symbols', args='-DHIDDEN=0')
+            self.check_build('hide_symbols')
+            cmd = f'nm -C build/hide_symbols/libbar.so | grep " T "'
+            ret, out = check_output(cmd)
+            self.assertEqual(0, ret, out)
+            out = out.replace('\r\n', '\n')
+            lines = out.strip().split('\n')
+            self.assertEqual(len(lines), 2, lines)
+            self.assertTrue(lines[0].endswith(' T bar'))
+            self.assertTrue(lines[1].endswith(' T bar_internal'))
+            shutil.rmtree('build/hide_symbols')
         elif os_name == 'mac':
-            self.check_generate('artifacts_path')
-            self.check_build('artifacts_path')
-            self.assertTrue(os.path.exists('build/artifacts_path/libfoo_static.a'))
-            self.assertTrue(os.path.exists('build/artifacts_path/libfoo_shared.dylib'))
-            self.assertTrue(os.path.exists('build/artifacts_path/hello'))
-            self.assertTrue(os.path.exists('build/artifacts_path/libsubfoo_static.a'))
-            self.assertTrue(os.path.exists('build/artifacts_path/libsubfoo_shared.dylib'))
-            self.assertTrue(os.path.exists('build/artifacts_path/subhello'))
-
-        shutil.rmtree('build/artifacts_path')
-
-    def test_debug_postfix(self):
-        if os_name == 'windows':
-            # msbuild
-            self.check_generate('debug_postfix')
-            self.check_build('debug_postfix', '--config Debug')
-            self.assertTrue(os.path.exists('build/debug_postfix/Debug/foo_d.lib'))
-            self.assertTrue(os.path.exists('build/debug_postfix/Debug/hello_d.exe'))
-            shutil.rmtree('build/debug_postfix')
-
-            ret, out = check_output('cl')
-            if ret == 0:
-                # ninja
-                self.check_generate('debug_postfix', args='-G Ninja')
-                self.check_build('debug_postfix')
-                self.assertTrue(os.path.exists('build/debug_postfix/foo.lib'))
-                self.assertTrue(os.path.exists('build/debug_postfix/hello.exe'))
-                shutil.rmtree('build/debug_postfix')
-
-                self.check_generate('debug_postfix', args='-G Ninja -DCMAKE_BUILD_TYPE=Debug')
-                self.check_build('debug_postfix')
-                self.assertTrue(os.path.exists('build/debug_postfix/foo.lib'))
-                self.assertTrue(os.path.exists('build/debug_postfix/hello.exe'))
-                shutil.rmtree('build/debug_postfix')
-
-                # Ninja Multi-Config
-                self.check_generate('debug_postfix', args='-G "Ninja Multi-Config"')
-                self.check_build('debug_postfix', '--config Debug')
-                self.assertTrue(os.path.exists('build/debug_postfix/Debug/foo_d.lib'))
-                self.assertTrue(os.path.exists('build/debug_postfix/Debug/hello_d.exe'))
-                shutil.rmtree('build/debug_postfix')
-        else:
-            # Ninja Multi-Config
-            self.check_generate('debug_postfix', args='-G "Ninja Multi-Config"')
-            self.check_build('debug_postfix')
-            self.assertTrue(os.path.exists('build/debug_postfix/Debug/libfoo_d.a'))
-            self.assertTrue(os.path.exists('build/debug_postfix/Debug/hello_d'))
-            shutil.rmtree('build/debug_postfix')
-
-            # make
-            self.check_generate('debug_postfix')
-            self.check_build('debug_postfix')
-            self.assertTrue(os.path.exists('build/debug_postfix/libfoo.a'))
-            self.assertTrue(os.path.exists('build/debug_postfix/hello'))
-            shutil.rmtree('build/debug_postfix')
-
-            self.check_generate('debug_postfix', args='-DCMAKE_BUILD_TYPE=Debug')
-            self.check_build('debug_postfix')
-            self.assertTrue(os.path.exists('build/debug_postfix/libfoo.a'))
-            self.assertTrue(os.path.exists('build/debug_postfix/hello'))
-            shutil.rmtree('build/debug_postfix')
-
+            self.check_generate('hide_symbols', args='-DHIDDEN=1')
+            self.check_build('hide_symbols')
+            cmd = 'nm -C build/hide_symbols/libbar.dylib | grep " T "'
+            ret, out = check_output(cmd)
+            self.assertEqual(0, ret, out)
+            out = out.replace('\r\n', '\n')
+            lines = out.strip().split('\n')
+            self.assertEqual(len(lines), 1, lines)
+            self.assertTrue(lines[0].endswith(' T _bar'))
+            shutil.rmtree('build/hide_symbols')
+
+            self.check_generate('hide_symbols', args='-DHIDDEN=0')
+            self.check_build('hide_symbols')
+            cmd = f'nm -C build/hide_symbols/libbar.dylib | grep " T "'
+            ret, out = check_output(cmd)
+            self.assertEqual(0, ret, out)
+            out = out.replace('\r\n', '\n')
+            lines = out.strip().split('\n')
+            self.assertEqual(len(lines), 2, lines)
+            self.assertTrue(lines[0].endswith(' T _bar'))
+            self.assertTrue(lines[1].endswith(' T _bar_internal'))
+            shutil.rmtree('build/hide_symbols')
 
 if __name__ == "__main__":
     unittest.main()
\ No newline at end of file
diff --git a/tests/hide_symbols/CMakeLists.txt b/tests/hide_symbols/CMakeLists.txt
new file mode 100644
index 0000000..2360cab
--- /dev/null
+++ b/tests/hide_symbols/CMakeLists.txt
@@ -0,0 +1,17 @@
+cmake_minimum_required(VERSION 3.10)
+project(test_hide_symbols)
+
+include(../../rocbuild.cmake)
+
+add_library(bar SHARED 
+  ../src/bar.h
+  ../src/bar.c
+  ../src/bar_internal.h
+  ../src/bar_internal.c
+)
+target_include_directories(bar PRIVATE ../src)
+target_compile_definitions(bar PRIVATE BAR_EXPORTS)
+
+if(HIDDEN)
+  rocbuild_hide_symbols(bar)
+endif()
diff --git a/tests/src/bar.c b/tests/src/bar.c
new file mode 100644
index 0000000..ea149c2
--- /dev/null
+++ b/tests/src/bar.c
@@ -0,0 +1,4 @@
+#include "bar.h"
+#include "bar_internal.h"
+
+int bar() { return 1 + bar_internal(); }
\ No newline at end of file
diff --git a/tests/src/bar.h b/tests/src/bar.h
new file mode 100644
index 0000000..af593de
--- /dev/null
+++ b/tests/src/bar.h
@@ -0,0 +1,25 @@
+#pragma once
+
+#ifdef BAR_EXPORTS
+#   if defined(_MSC_VER) || defined(__CYGWIN__) || defined(__MINGW32__)
+#       define BAR_API __declspec(dllexport)
+#   elif defined(__GNUC__) && __GNUC__ >= 4
+#       define BAR_API __attribute__ ((visibility ("default")))
+#   endif
+#else
+#   if defined(_MSC_VER) || defined(__CYGWIN__) || defined(__MINGW32__)
+#       define BAR_API __declspec(dllimport)
+#   else
+#       define BAR_API
+#   endif
+#endif
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+BAR_API int bar();
+
+#ifdef __cplusplus
+}
+#endif
\ No newline at end of file
diff --git a/tests/src/bar_internal.c b/tests/src/bar_internal.c
new file mode 100644
index 0000000..7974c48
--- /dev/null
+++ b/tests/src/bar_internal.c
@@ -0,0 +1,6 @@
+#include "bar_internal.h"
+
+int bar_internal()
+{
+    return 2;
+}
\ No newline at end of file
diff --git a/tests/src/bar_internal.h b/tests/src/bar_internal.h
new file mode 100644
index 0000000..7deb627
--- /dev/null
+++ b/tests/src/bar_internal.h
@@ -0,0 +1,11 @@
+#pragma once
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+int bar_internal();
+
+#ifdef __cplusplus
+}
+#endif
\ No newline at end of file