diff -Nur a/CMakeLists.txt b/CMakeLists.txt
--- a/CMakeLists.txt	2016-12-15 09:23:52.000000000 +0800
+++ b/CMakeLists.txt	2021-08-02 15:26:00.325790200 +0800
@@ -66,7 +66,7 @@
    if (__LIBGME_TEST_VISIBILITY)
       # get the gcc version
       exec_program(${CMAKE_CXX_COMPILER} ARGS --version OUTPUT_VARIABLE _gcc_version_info)
-      string (REGEX MATCH "[3-9]\\.[0-9]\\.[0-9]" _gcc_version "${_gcc_version_info}")
+      string (REGEX MATCH "[0-9]+\\.[0-9]+\\.[0-9]+" _gcc_version "${_gcc_version_info}")
 
       # gcc <4.1 had poor support for symbol visibility
       if ((${_gcc_version} VERSION_GREATER "4.1") OR (${_gcc_version} VERSION_EQUAL "4.1"))