如何列出所有 CMake 构建选项及其默认值？

如何在命令行中列出 cmake 默认构建选项？
我需要从源代码构建 OpenCV 库。在此之前，我想知道默认的构建设置是什么。

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I do not know of an direct way to do it.

A way around this is to edit the main CMakeLists.txt and print at the end of the file the settings you are interested. The Variables where the most important cmake setting are stored are listed here:

I always print these variables at the end of my CMakeLists.txt to see the settings.

MESSAGE(STATUS "Build type: " ${CMAKE_BUILD_TYPE})
MESSAGE(STATUS "Library Type: " ${LIB_TYPE})
MESSAGE(STATUS "Compiler flags:" ${CMAKE_CXX_COMPILE_FLAGS})
MESSAGE(STATUS "Compiler cxx debug flags:" ${CMAKE_CXX_FLAGS_DEBUG})
MESSAGE(STATUS "Compiler cxx release flags:" ${CMAKE_CXX_FLAGS_RELEASE})
MESSAGE(STATUS "Compiler cxx min size flags:" ${CMAKE_CXX_FLAGS_MINSIZEREL})
MESSAGE(STATUS "Compiler cxx flags:" ${CMAKE_CXX_FLAGS})
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最佳答案

cmake -LA

To list all option(...) and set(CACHE ...) (cached) variables, do:

mkdir build
cd build
cmake ..
cmake -LA | awk '{if(f)print} /-- Cache values/{f=1}'

Sample stdout:

AUTOGEMM_ARCHITECTURE:STRING=Hawaii
BLAS_DEBUG_TOOLS:BOOL=OFF
BLAS_DUMP_CLBLAS_KERNELS:BOOL=OFF
BLAS_KEEP_KERNEL_SOURCES:BOOL=ON
BLAS_PRINT_BUILD_ERRORS:BOOL=O

The -A switch also show options marked as advanced, so you will likely want to omit it when casually browsing the most useful options.

You may also be interested in adding -H to show more help information about each option as previously mentioned at: https://stackoverflow.com/a/53075317/895245

cmake -LAH

ccmake ncurses

sudo apt-get install cmake-curses-gui
ccmake ..

shows:

Tested in Ubuntu 16.10, cmake 3.5.2.

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You can do cmake -LAH too. The H flag will provide you help for each option.


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