cmake HAVE_ATTRIBUTE_VISIBILITY_INTERNAL examples

HDFGroup/hdf5 config/cmake/ZLIBNG/CMakeLists.txt :493 

check_c_source_compiles(
    "#define Z_INTERNAL __attribute__((visibility (\"internal\")))
    int Z_INTERNAL foo;
    int main() {
        return 0;
    }"
    HAVE_ATTRIBUTE_VISIBILITY_INTERNAL FAIL_REGEX "visibility")

InsightSoftwareConsortium/ITK Modules/ThirdParty/HDF5/src/itkhdf5/config/cmake/ZLIBNG/CMakeLists.txt :430 

check_c_source_compiles(
    "#define Z_INTERNAL __attribute__((visibility (\"internal\")))
    int Z_INTERNAL foo;
    int main() {
        return 0;
    }"
    HAVE_ATTRIBUTE_VISIBILITY_INTERNAL FAIL_REGEX "visibility")

InsightSoftwareConsortium/ITK Modules/ThirdParty/ZLIB/src/itkzlib-ng/CMakeLists.txt :501 

check_c_source_compiles(
    "#define Z_INTERNAL __attribute__((visibility (\"internal\")))
    int Z_INTERNAL foo;
    int main() {
        return 0;
    }"
    HAVE_ATTRIBUTE_VISIBILITY_INTERNAL FAIL_REGEX "visibility")