CMAKE的一些编译选项 -lpthread_cmake lpthread-优快云博客

本文详细介绍了如何使用CMake配置项目构建类型，包括Debug与Release模式下的编译选项，并展示了如何设置OpenCV依赖及源文件。

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set(CMAKE_BUILD_TYPE "Release")

if( CMAKE_BUILD_TYPE STREQUAL "Debug" )
set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -std=c++11 -g -Wall -Wno-unused-variable -pthread")
else( CMAKE_BUILD_TYPE STREQUAL "Debug" )
set(CMAKE_BUILD_TYPE "Release")
set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -std=c++11 -O2 -pthread -fopenmp")
endif( CMAKE_BUILD_TYPE STREQUAL "Debug" )

message("Build Type:"${CMAKE_BUILD_TYPE} ${CMAKE_CXX_FLAGS})

debug模式下,加-Os，速度会快

Release模式下，加 -O2,和不加，有比较显著的差异

# project
set(PROJECTNAME "Test")
project(${PROJECTNAME} C CXX)
set (CMAKE_CXX_FLAG "-Wall")
set(CMAKE_RUNTIME_OUTPUT_DIRECTORY "./")

include_directories(${CMAKE_CURRENT_BINARY_DIR})

find_package(OpenCV REQUIRED)

file(GLOB_RECURSE ${PROJECTNAME}_HEADERS ${CMAKE_SOURCE_DIR}/*.h)
file(GLOB_RECURSE ${PROJECTNAME}_SOURCES ${CMAKE_SOURCE_DIR}/*.cpp)
file(GLOB_RECURSE ${PROJECTNAME}_SOURCES ${CMAKE_SOURCE_DIR}/*.c)

include_directories (include)
include_directories (src)

SET(${PROJECTNAME}_SOURCES
    main.cpp
    ${${PROJECTNAME}_SOURCES}
)


ADD_EXECUTABLE(${PROJECTNAME}
    ${${PROJECTNAME}_SOURCES}
    ${${PROJECTNAME}_HEADERS}

)