diff options
Diffstat (limited to 'build_files/cmake')
| -rw-r--r-- | build_files/cmake/macros.cmake | 71 |
1 files changed, 71 insertions, 0 deletions
diff --git a/build_files/cmake/macros.cmake b/build_files/cmake/macros.cmake index 28af1c1486c..772ff6d7596 100644 --- a/build_files/cmake/macros.cmake +++ b/build_files/cmake/macros.cmake @@ -483,6 +483,77 @@ macro(TEST_STDBOOL_SUPPORT) HAVE_STDBOOL_H) endmacro() +macro(TEST_UNORDERED_MAP_SUPPORT) + # - Detect unordered_map availability + # Test if a valid implementation of unordered_map exists + # and define the include path + # This module defines + # HAVE_UNORDERED_MAP, whether unordered_map implementation was found + # + # HAVE_STD_UNORDERED_MAP_HEADER, <unordered_map.h> was found + # HAVE_UNORDERED_MAP_IN_STD_NAMESPACE, unordered_map is in namespace std + # HAVE_UNORDERED_MAP_IN_TR1_NAMESPACE, unordered_map is in namespace std::tr1 + # + # UNORDERED_MAP_INCLUDE_PREFIX, include path prefix for unordered_map, if found + # UNORDERED_MAP_NAMESPACE, namespace for unordered_map, if found + + include(CheckIncludeFileCXX) + CHECK_INCLUDE_FILE_CXX("unordered_map" HAVE_STD_UNORDERED_MAP_HEADER) + if(HAVE_STD_UNORDERED_MAP_HEADER) + # Even so we've found unordered_map header file it doesn't + # mean unordered_map and unordered_set will be declared in + # std namespace. + # + # Namely, MSVC 2008 have unordered_map header which declares + # unordered_map class in std::tr1 namespace. In order to support + # this, we do extra check to see which exactly namespace is + # to be used. + + include(CheckCXXSourceCompiles) + CHECK_CXX_SOURCE_COMPILES("#include <unordered_map> + int main() { + std::unordered_map<int, int> map; + return 0; + }" + HAVE_UNORDERED_MAP_IN_STD_NAMESPACE) + if(HAVE_UNORDERED_MAP_IN_STD_NAMESPACE) + message(STATUS "Found unordered_map/set in std namespace.") + + set(HAVE_UNORDERED_MAP "TRUE") + set(UNORDERED_MAP_INCLUDE_PREFIX "") + set(UNORDERED_MAP_NAMESPACE "std") + else() + CHECK_CXX_SOURCE_COMPILES("#include <unordered_map> + int main() { + std::tr1::unordered_map<int, int> map; + return 0; + }" + HAVE_UNORDERED_MAP_IN_TR1_NAMESPACE) + if(HAVE_UNORDERED_MAP_IN_TR1_NAMESPACE) + message(STATUS "Found unordered_map/set in std::tr1 namespace.") + + set(HAVE_UNORDERED_MAP "TRUE") + set(UNORDERED_MAP_INCLUDE_PREFIX "") + set(UNORDERED_MAP_NAMESPACE "std::tr1") + else() + message(STATUS "Found <unordered_map> but cannot find either std::unordered_map " + "or std::tr1::unordered_map.") + endif() + endif() + else() + CHECK_INCLUDE_FILE_CXX("tr1/unordered_map" HAVE_UNORDERED_MAP_IN_TR1_NAMESPACE) + if(HAVE_UNORDERED_MAP_IN_TR1_NAMESPACE) + message(STATUS "Found unordered_map/set in std::tr1 namespace.") + + set(HAVE_UNORDERED_MAP "TRUE") + set(UNORDERED_MAP_INCLUDE_PREFIX "tr1") + set(UNORDERED_MAP_NAMESPACE "std::tr1") + else() + message(STATUS "Unable to find <unordered_map> or <tr1/unordered_map>. ") + endif() + endif() +endmacro() + # when we have warnings as errors applied globally this # needs to be removed for some external libs which we dont maintain. |