CMake常用特性

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• debug/release
  1、CMakeLists.txt中添加如下两行
  set(CMAKE_CXX_FLAGS_DEBUG “$ENV{CXXFLAGS} -O0 -Wall -g -ggdb”)
  set(CMAKE_CXX_FLAGS_RELEASE “$ENV{CXXFLAGS} -O3 -Wall”)
  2、生成Makefile的时候这样做
  “ cmake -DCMAKE_BUILD_TYPE=Debug ..”或者“cmake -DCMAKE_BUILD_TYPE=Release ..”

• 编译时显示gcc/g++信息
  set(CMAKE_VERBOSE_MAKEFILE ON)

• 动静态库的问题

  • 编译
    只要链接的是静态库，那么引用的库就会被编译进target

  • 同时编译动静态库
    aux_source_directory(. SRCS)
    add_library(hello SHARED ${SRCS})
    add_library(hello_static STATIC ${SRCS})
    set_target_properties(hello_static PROPERTIES OUTPUT_NAME “hello”)
    set_target_properties(hello PROPERTIES CLEAN_DIRECT_OUTPUT 1)
    set_target_properties(hello_static PROPERTIES CLEAN_DIRECT_OUTPUT 1)

  • target引用其他target
    cmake_minimum_required(VERSION 3.6)
    project(cmake_static_library_test)
    set(CMAKE_CXX_FLAGS “${CMAKE_CXX_FLAGS} -std=c++11”)
    include_directories(./hello)
    link_directories(${CMAKE_BINARY_DIR}/hello)
    add_subdirectory(hello)
    set(SOURCE_FILES main.cpp)
    add_executable(cmake_static_library_test ${SOURCE_FILES})
    add_dependencies(cmake_static_library_test hello_static)
    target_link_libraries(cmake_static_library_test libhello.a)