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183 lines
6.6 KiB
CMake
183 lines
6.6 KiB
CMake
cmake_minimum_required(VERSION 3.4)
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project("Cap'n Proto" CXX)
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set(VERSION 0.10-dev)
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list(APPEND CMAKE_MODULE_PATH "${CMAKE_CURRENT_SOURCE_DIR}/cmake")
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include(CheckIncludeFileCXX)
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include(GNUInstallDirs)
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if(MSVC)
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check_include_file_cxx(initializer_list HAS_CXX14)
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else()
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check_include_file_cxx(initializer_list HAS_CXX14 "-std=gnu++1y")
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endif()
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if(NOT HAS_CXX14)
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message(SEND_ERROR "Requires a C++14 compiler and standard library.")
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endif()
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# these arguments are passed to all install(TARGETS) calls
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set(INSTALL_TARGETS_DEFAULT_ARGS
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EXPORT CapnProtoTargets
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ARCHIVE DESTINATION "${CMAKE_INSTALL_LIBDIR}"
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LIBRARY DESTINATION "${CMAKE_INSTALL_LIBDIR}"
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RUNTIME DESTINATION "${CMAKE_INSTALL_BINDIR}"
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)
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# Options ======================================================================
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option(BUILD_TESTING "Build unit tests and enable CTest 'check' target." ON)
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option(EXTERNAL_CAPNP "Use the system capnp binary, or the one specified in $CAPNP, instead of using the compiled one." OFF)
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option(CAPNP_LITE "Compile Cap'n Proto in 'lite mode', in which all reflection APIs (schema.h, dynamic.h, etc.) are not included. Produces a smaller library at the cost of features. All programs built against the library must be compiled with -DCAPNP_LITE. Requires EXTERNAL_CAPNP." OFF)
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# Check for invalid combinations of build options
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if(CAPNP_LITE AND BUILD_TESTING AND NOT EXTERNAL_CAPNP)
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message(SEND_ERROR "You must set EXTERNAL_CAPNP when using CAPNP_LITE and BUILD_TESTING.")
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endif()
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if(CAPNP_LITE)
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set(CAPNP_LITE_FLAG "-DCAPNP_LITE")
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# This flag is attached as PUBLIC target_compile_definition to kj target
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else()
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set(CAPNP_LITE_FLAG)
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endif()
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set(WITH_OPENSSL "AUTO" CACHE STRING
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"Whether or not to build libkj-tls by linking against openssl")
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# define list of values GUI will offer for the variable
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set_property(CACHE WITH_OPENSSL PROPERTY STRINGS AUTO ON OFF)
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# shadow cache variable original value with ON/OFF,
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# so from now on OpenSSL-specific code just has to check:
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# if (WITH_OPENSSL)
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# ...
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# endif()
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if (CAPNP_LITE)
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set(WITH_OPENSSL OFF)
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elseif (WITH_OPENSSL STREQUAL "AUTO")
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find_package(OpenSSL COMPONENTS Crypto SSL)
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if (OPENSSL_FOUND)
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set(WITH_OPENSSL ON)
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else()
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set(WITH_OPENSSL OFF)
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endif()
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elseif (WITH_OPENSSL)
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find_package(OpenSSL REQUIRED COMPONENTS Crypto SSL)
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endif()
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if(MSVC)
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# TODO(cleanup): Enable higher warning level in MSVC, but make sure to test
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# build with that warning level and clean out false positives.
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add_compile_options(/wo4503)
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# Only warn once on truncated decorated names. The maximum symbol length MSVC
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# supports is 4k characters, which the parser framework regularly blows. The
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# compiler likes to print out the entire type that went over the limit along
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# with this warning, which gets unbearably spammy. That said, we don't want to
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# just ignore it, so I'm letting it trigger once until we find some places to
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# inject ParserRefs.
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else()
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# Note that it's important to add new CXXFLAGS before ones specified by the
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# user, so that the user's flags override them. This is particularly
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# important if -Werror was enabled and then certain warnings need to be
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# disabled, as is done in super-test.sh.
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#
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# We enable a lot of warnings, but then disable some:
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# * strict-aliasing: We use type-punning in known-safe ways that GCC doesn't
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# recognize as safe.
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# * sign-compare: Low S/N ratio.
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# * unused-parameter: Low S/N ratio.
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add_compile_options(-Wall -Wextra -Wno-strict-aliasing -Wno-sign-compare -Wno-unused-parameter)
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if(DEFINED CMAKE_CXX_EXTENSIONS AND NOT CMAKE_CXX_EXTENSIONS)
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message(SEND_ERROR "Cap'n Proto requires compiler-specific extensions (e.g., -std=gnu++14). Please leave CMAKE_CXX_EXTENSIONS undefined or ON.")
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endif()
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if (NOT ANDROID)
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add_compile_options(-pthread)
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endif()
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endif()
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# Source =======================================================================
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include(CapnProtoMacros)
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add_subdirectory(src)
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# Install ======================================================================
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include(CMakePackageConfigHelpers)
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# We used to use write_basic_package_version_file(), but since the autotools build needs to install
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# a config version script as well, I copied the AnyNewerVersion template from my CMake Modules
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# directory to Cap'n Proto's cmake/ directory (alternatively, we could make the autotools build
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# depend on CMake).
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#
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# We might as well use the local copy of the template. In the future we can modify the project's
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# version compatibility policy just by changing that file.
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set(PACKAGE_VERSION ${VERSION})
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configure_file(cmake/CapnProtoConfigVersion.cmake.in cmake/CapnProtoConfigVersion.cmake @ONLY)
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set(CONFIG_PACKAGE_LOCATION ${CMAKE_INSTALL_LIBDIR}/cmake/CapnProto)
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configure_package_config_file(cmake/CapnProtoConfig.cmake.in
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${CMAKE_CURRENT_BINARY_DIR}/cmake/CapnProtoConfig.cmake
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INSTALL_DESTINATION ${CONFIG_PACKAGE_LOCATION}
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PATH_VARS CMAKE_INSTALL_FULL_INCLUDEDIR
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)
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export(EXPORT CapnProtoTargets
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FILE "${CMAKE_CURRENT_BINARY_DIR}/cmake/CapnProtoTargets.cmake"
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NAMESPACE CapnProto::
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)
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install(EXPORT CapnProtoTargets
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FILE CapnProtoTargets.cmake
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NAMESPACE CapnProto::
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DESTINATION ${CONFIG_PACKAGE_LOCATION}
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)
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install(FILES
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cmake/CapnProtoMacros.cmake
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${CMAKE_CURRENT_BINARY_DIR}/cmake/CapnProtoConfig.cmake
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${CMAKE_CURRENT_BINARY_DIR}/cmake/CapnProtoConfigVersion.cmake
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DESTINATION ${CONFIG_PACKAGE_LOCATION}
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)
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#install CapnProtoMacros for CapnProtoConfig.cmake build directory consumers
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configure_file(cmake/CapnProtoMacros.cmake cmake/CapnProtoMacros.cmake COPYONLY)
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if(NOT MSVC) # Don't install pkg-config files when building with MSVC
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# Variables for pkg-config files
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set(prefix "${CMAKE_INSTALL_PREFIX}")
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set(exec_prefix "") # not needed since we use absolute paths in libdir and includedir
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set(libdir "${CMAKE_INSTALL_FULL_LIBDIR}")
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set(includedir "${CMAKE_INSTALL_FULL_INCLUDEDIR}")
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set(PTHREAD_CFLAGS "-pthread")
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set(STDLIB_FLAG) # TODO: Unsupported
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set(CAPNP_PKG_CONFIG_FILES
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pkgconfig/kj.pc
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pkgconfig/capnp.pc
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pkgconfig/capnpc.pc
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)
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if(NOT CAPNP_LITE)
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list(APPEND CAPNP_PKG_CONFIG_FILES
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pkgconfig/kj-async.pc
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pkgconfig/kj-gzip.pc
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pkgconfig/kj-http.pc
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pkgconfig/kj-test.pc
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pkgconfig/kj-tls.pc
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pkgconfig/capnp-rpc.pc
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pkgconfig/capnp-websocket.pc
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pkgconfig/capnp-json.pc
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)
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endif()
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foreach(pcfile ${CAPNP_PKG_CONFIG_FILES})
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configure_file(${pcfile}.in "${CMAKE_CURRENT_BINARY_DIR}/${pcfile}" @ONLY)
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install(FILES "${CMAKE_CURRENT_BINARY_DIR}/${pcfile}" DESTINATION "${CMAKE_INSTALL_LIBDIR}/pkgconfig")
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endforeach()
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unset(STDLIB_FLAG)
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unset(PTHREAD_CFLAGS)
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unset(includedir)
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unset(libdir)
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unset(exec_prefix)
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unset(prefix)
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endif()
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