diff options
Diffstat (limited to 'build_files')
| -rw-r--r-- | build_files/cmake/macros.cmake | 10 |
1 files changed, 9 insertions, 1 deletions
diff --git a/build_files/cmake/macros.cmake b/build_files/cmake/macros.cmake index 239371c227c..08d26e55ed4 100644 --- a/build_files/cmake/macros.cmake +++ b/build_files/cmake/macros.cmake @@ -803,7 +803,15 @@ macro(TEST_UNORDERED_MAP_SUPPORT) # UNORDERED_MAP_NAMESPACE, namespace for unordered_map, if found include(CheckIncludeFileCXX) - CHECK_INCLUDE_FILE_CXX("unordered_map" HAVE_STD_UNORDERED_MAP_HEADER) + + # Workaround for newer GCC (6.x+) where C++11 was enabled by default, which lead us + # to a situation when there is <unordered_map> include but which can't be used uless + # C++11 is enabled. + if(CMAKE_COMPILER_IS_GNUCC AND (NOT "${CMAKE_C_COMPILER_VERSION}" VERSION_LESS "6.0") AND (NOT WITH_CXX11)) + set(HAVE_STD_UNORDERED_MAP_HEADER False) + else() + CHECK_INCLUDE_FILE_CXX("unordered_map" HAVE_STD_UNORDERED_MAP_HEADER) + endif() 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 |