cmake HAVE_NAMESPACES examples

ucla-vision/xivo thirdparty/glog/CMakeLists.txt :211

check_cxx_source_compiles ("
namespace Outer { namespace Inner { int i = 0; }}
using namespace Outer::Inner;;
int main() { return i; }
" HAVE_NAMESPACES)

feelpp/feelpp feelpp/contrib/glog/CMakeLists.txt :189

check_cxx_source_compiles ("
namespace Outer { namespace Inner { int i = 0; }}
using namespace Outer::Inner;;
int main() { return i; }
" HAVE_NAMESPACES)

SwagSoftware/Kisak-Strike thirdparty/gperftools-2.8.1/CMakeLists.txt :350

check_c_source_compiles(
  "namespace abc { void foo() {} } int main() { abc::foo(); return 0; }"
  HAVE_NAMESPACES)

plumonito/dtslam 3rdparty/glog_cmake/CMakeLists.txt :102

CHECK_CXX_SOURCE_COMPILES("namespace foo {} int main() { return 0; }" HAVE_NAMESPACES)

chatopera/clause thirdparty/glog/CMakeLists.txt :188

check_cxx_source_compiles ("
namespace Outer { namespace Inner { int i = 0; }}
using namespace Outer::Inner;;
int main() { return i; }
" HAVE_NAMESPACES)