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Make C++ standard configurable

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This commit is contained in:
Dean Moldovan 2016-05-28 11:08:16 +02:00
parent 9fb50c56d0
commit c3c27c4259
1 changed files with 19 additions and 12 deletions
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31
CMakeLists.txt
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@ -21,12 +21,28 @@ option(PYBIND11_TEST "Build tests?" ${PYBIND11_MASTER_PROJECT})
# Add a CMake parameter for choosing a desired Python version
set(PYBIND11_PYTHON_VERSION "" CACHE STRING "Python version to use for compiling the example application")
include(CheckCXXCompilerFlag)
list(APPEND CMAKE_MODULE_PATH "${CMAKE_CURRENT_LIST_DIR}/tools")
set(Python_ADDITIONAL_VERSIONS 3.4 3.5 3.6 3.7)
find_package(PythonLibsNew ${PYBIND11_PYTHON_VERSION} REQUIRED)
include(CheckCXXCompilerFlag)
if(NOT MSVC AND NOT PYBIND11_CPP_STANDARD)
check_cxx_compiler_flag("-std=c++14" HAS_CPP14_FLAG)
check_cxx_compiler_flag("-std=c++11" HAS_CPP11_FLAG)
if (HAS_CPP14_FLAG)
set(PYBIND11_CPP_STANDARD -std=c++14)
elseif (HAS_CPP11_FLAG)
set(PYBIND11_CPP_STANDARD -std=c++11)
else()
message(FATAL_ERROR "Unsupported compiler -- pybind11 requires C++11 support!")
endif()
set(PYBIND11_CPP_STANDARD ${PYBIND11_CPP_STANDARD} CACHE STRING
"C++ standard flag, e.g. -std=c++11 or -std=c++14. Defaults to latest available.")
endif()
# Cache variables so pybind11_add_module can be used in parent projects
set(PYBIND11_INCLUDE_DIR "${CMAKE_CURRENT_LIST_DIR}/include" CACHE INTERNAL "")
set(PYTHON_INCLUDE_DIRS ${PYTHON_INCLUDE_DIRS} CACHE INTERNAL "")
@ -67,16 +83,7 @@ function(pybind11_add_module target_name)
if(NOT MSVC)
# Make sure C++11/14 are enabled
check_cxx_compiler_flag("-std=c++14" HAS_CPP14_FLAG)
check_cxx_compiler_flag("-std=c++11" HAS_CPP11_FLAG)
if (HAS_CPP14_FLAG)
target_compile_options(${target_name} PUBLIC "-std=c++14")
elseif (HAS_CPP11_FLAG)
target_compile_options(${target_name} PUBLIC "-std=c++11")
else()
message(FATAL_ERROR "Unsupported compiler -- pybind11 requires C++11 support!")
endif()
target_compile_options(${target_name} PUBLIC ${PYBIND11_CPP_STANDARD})
# Enable link time optimization and set the default symbol
# visibility to hidden (very important to obtain small binaries)