diff options
| -rw-r--r-- | CMakeLists.txt | 46 |
1 files changed, 39 insertions, 7 deletions
diff --git a/CMakeLists.txt b/CMakeLists.txt index 74f6c62f..c8a885a3 100644 --- a/CMakeLists.txt +++ b/CMakeLists.txt @@ -803,6 +803,12 @@ ENDIF() INCLUDE(cmake/cmake-cxx11/Modules/CheckCXX11Features.cmake) # Smart pointers +# +# If a C++11-compliant compiler is available and supports std::shared_ptr<>, +# use the standard implementation. Else, use boost::shared_ptr<>. +# In any case, let the user override the choice with VMIME_SHARED_PTR_USE_CXX +# and VMIME_SHARED_PTR_USE_BOOST variables. + CHECK_CXX_SOURCE_COMPILES( " #include <memory> @@ -815,7 +821,35 @@ CHECK_CXX_SOURCE_COMPILES( VMIME_HAS_CXX11_SHARED_PTR ) -IF(CXX11_COMPILER_FLAGS AND VMIME_HAS_CXX11_SHARED_PTR) +IF(NOT VMIME_SHARED_PTR_USE_CXX AND NOT VMIME_SHARED_PTR_USE_BOOST) + IF(CXX11_COMPILER_FLAGS AND VMIME_HAS_CXX11_SHARED_PTR) + # If std::shared_ptr<> is available, use it by default + SET(VMIME_SHARED_PTR_USE_CXX_DEFAULT ON) + SET(VMIME_SHARED_PTR_USE_BOOST_DEFAULT OFF) + ELSE() + # Else, set default to boost::shared_ptr<> + SET(VMIME_SHARED_PTR_USE_CXX_DEFAULT OFF) + SET(VMIME_SHARED_PTR_USE_BOOST_DEFAULT ON) + ENDIF() +ENDIF() + +OPTION( + VMIME_SHARED_PTR_USE_CXX + "Use standard std::shared_ptr<> (requires a C++11 compiler)" + ${VMIME_SHARED_PTR_USE_CXX_DEFAULT} +) + +OPTION( + VMIME_SHARED_PTR_USE_BOOST + "Use boost::shared_ptr<> (requires Boost)" + ${VMIME_SHARED_PTR_USE_BOOST_DEFAULT} +) + +IF(VMIME_SHARED_PTR_USE_CXX AND VMIME_SHARED_PTR_USE_BOOST) + MESSAGE(FATAL_ERROR "Options VMIME_SHARED_PTR_USE_CXX and VMIME_SHARED_PTR_USE_BOOST are mutually exclusive (select one or the other, but not both!)") +ENDIF() + +IF(VMIME_SHARED_PTR_USE_CXX) SET(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} ${CXX11_COMPILER_FLAGS}") @@ -825,10 +859,7 @@ IF(CXX11_COMPILER_FLAGS AND VMIME_HAS_CXX11_SHARED_PTR) MESSAGE(STATUS "Checking support for shared_ptr<>: built-in (C++11)") - SET(VMIME_SHARED_PTR_USE_CXX ON) - SET(VMIME_SHARED_PTR_USE_BOOST OFF) - -ELSE() +ELSEIF(VMIME_SHARED_PTR_USE_BOOST) # Depends on Boost library if C++11 is not supported FIND_PACKAGE(Boost) @@ -841,8 +872,9 @@ ELSE() MESSAGE(STATUS "Checking support for shared_ptr<>: boost library") - SET(VMIME_SHARED_PTR_USE_CXX OFF) - SET(VMIME_SHARED_PTR_USE_BOOST ON) +ELSE() + + MESSAGE(FATAL_ERROR "No implementation for shared_ptr<> was selected/found") ENDIF() |