| cmake_minimum_required (VERSION 2.6) |
| PROJECT(PrecompiledHeader C) |
| |
| # Make sure the proper compiler is in use. |
| IF(NOT MSVC) |
| MESSAGE(FATAL_ERROR "The PrecompiledHeader test works only with MSVC") |
| ENDIF(NOT MSVC) |
| |
| # Compute a custom name for the precompiled header. |
| IF(CMAKE_CONFIGURATION_TYPES) |
| SET(PCH_DIR "${CMAKE_CURRENT_BINARY_DIR}/PCH/${CMAKE_CFG_INTDIR}") |
| ELSE(CMAKE_CONFIGURATION_TYPES) |
| SET(PCH_DIR "${CMAKE_CURRENT_BINARY_DIR}/PCH") |
| ENDIF(CMAKE_CONFIGURATION_TYPES) |
| FILE(MAKE_DIRECTORY ${CMAKE_CURRENT_BINARY_DIR}/PCH) |
| |
| # The VS6 IDE does not support renaming .pch files with /Fp. |
| IF("${CMAKE_GENERATOR}" MATCHES "Visual Studio 6") |
| SET(PCH_USE_INCLUDE_DIR 1) |
| SET(PCH_FILE) |
| ELSE("${CMAKE_GENERATOR}" MATCHES "Visual Studio 6") |
| SET(PCH_USE_INCLUDE_DIR 0) |
| SET(PCH_FILE "\"/Fp${PCH_DIR}/foo_precompiled.pch\"") |
| ENDIF("${CMAKE_GENERATOR}" MATCHES "Visual Studio 6") |
| |
| # Choose between an explicit include path and using /I during |
| # precompilation. The /I form is used to test that the PCH is |
| # actually used. In practice the include path form would be used. |
| IF(PCH_USE_INCLUDE_DIR) |
| INCLUDE_DIRECTORIES(${CMAKE_CURRENT_SOURCE_DIR}/include) |
| ELSE(PCH_USE_INCLUDE_DIR) |
| SET(PCH_INCLUDE_DIR "\"/I${CMAKE_CURRENT_SOURCE_DIR}/include\"") |
| ENDIF(PCH_USE_INCLUDE_DIR) |
| |
| # Create a target that will use a precompiled header. |
| SET(foo_SRCS foo1.c foo2.c) |
| ADD_EXECUTABLE(foo foo_precompile.c ${foo_SRCS}) |
| |
| # Setup flags on the target to create and use the precompiled header. |
| SET_TARGET_PROPERTIES(foo PROPERTIES |
| COMPILE_FLAGS "/Yufoo_precompiled.h /FIfoo_precompiled.h ${PCH_FILE}") |
| SET_SOURCE_FILES_PROPERTIES(foo_precompile.c PROPERTIES |
| COMPILE_FLAGS "/Ycfoo_precompiled.h ${PCH_INCLUDE_DIR}") |
| |
| # Setup dependencies for precompiled header creation and use. The VS |
| # IDE takes care of this automatically. |
| IF("${CMAKE_GENERATOR}" MATCHES "Makefile") |
| # This source file creates the precompiled header as a side-effect. |
| SET_SOURCE_FILES_PROPERTIES(foo_precompile.c PROPERTIES |
| OBJECT_OUTPUTS "${PCH_DIR}/foo_precompiled.pch") |
| |
| # These source files use the precompiled header. |
| SET_SOURCE_FILES_PROPERTIES(${foo_SRCS} PROPERTIES |
| OBJECT_DEPENDS "${PCH_DIR}/foo_precompiled.pch") |
| ENDIF("${CMAKE_GENERATOR}" MATCHES "Makefile") |
