CODEWITHSUNDEEP
cmake
Felix
Felix

Reputation: 7146

CMAKE override variable set in CMakeLists.txt via commandline

I have a CMakeLists.txt with the following in it, that I can not modify:

set(BUILD_SHARED_LIBS ON)

I want to override this variable use the commandline. I tried this:

cmake -UBUILD_SHARED_LIBS -DBUILD_SHARED_LIBS=OFF ..

but it has no effect. Is there any way to tell cmake to use a value from the commandline instead of this value?

Note: I am aware that using the cache like shown below would solve the problem, but as I cannot edit the file, that sadly is not an option:

set(BUILD_SHARED_LIBS ON CACHE BOOL "library build mode")

Upvotes: 9

Views: 6637

Answers (1)

Tsyvarev
Tsyvarev

Reputation: 65870

Using command line you cannot override setting of the normal (non-cached) variable.

If you pass a variable via command line, then it is always a cache variable. At the time when normal flavor of the variable is set in the CMakeLists.txt, both flavors exist. But when a variable is dereferenced, CMake prefers normal flavor to the cached one. See more in the variables' documentation.

Upvotes: 9

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