This paper mainly introduces CMAKE_BUILD_TYPE And related parameters

CMAKE_BUILD_TYPE

Optional values include

1. Debug： Used without optimization , Build libraries or executables with debug symbols
2. Release： Optimized libraries or executables for building , Does not contain debug symbols
3. RelWithDebInfo： Because fewer optimization libraries or executables are built , Contains debug symbols
4. MinSizeRel： Used for optimization without increasing the size of the object code , To build or executable files

Usage method

set(CMAKE_BUILD_TYPE "Debug") # CMakeLists.txt It is specified in

perhaps

cmake .. -D CMAKE_BUILD_TYPE="Debug" # Specify when generating commands

Example

	set(CMAKE_CXX_FLAGS_DEBUG "$ENV{CXXFLAGS} -O0 -Wall -g2 -ggdb") #  Enable GDB
	set(CMAKE_CXX_FLAGS_RELEASE "$ENV{CXXFLAGS} -O3 -Wall") #  Enable optimization （1～3）

Different type Corresponding compilation options

notes

1. CMAKE_CXX_FLAGS Is a common parameter , The total compilation parameters are CMAKE_CXX_FLAGS + One of them CMAKE_CXX_FLAGS_XXX

     2、 except CMAKE_CXX_FLAGS Variable , You can also use add_compile_options To add compilation options

# Determine compiler type , If it is gcc compiler , Add... To the compilation options c++11 Support 
if(CMAKE_COMPILER_IS_GNUCXX)
    add_compile_options(-std=c++11)
    message(STATUS "optional:-std=c++11")   
endif(CMAKE_COMPILER_IS_GNUCXX)