CODEWITHSUNDEEP
cmake
Karnivaurus
Karnivaurus

Reputation: 24111

Cmake option default value

If I have a CMakeLists.txt file:

cmake_minimum_required(VERSION 2.8)

OPTION(FOO "Foo Option" OFF)

MESSAGE("FOO? " ${FOO})

And then I call cmake on it, I get the following output:

FOO? ON

Why is this? Haven't I specified the default for FOO is to be OFF?

Upvotes: 7

Views: 12085

Answers (4)

Ciro Santilli OurBigBook.com
Ciro Santilli OurBigBook.com

Reputation: 382472

Instead of deleting our entire build directory as per https://stackoverflow.com/a/56119191/895245 you could also try to unset just one variable with:

cmake -U FOO

to ensure that it is not being cached to a non-default value.

Upvotes: 1

AshFTW
AshFTW

Reputation: 141

Delete CMakeCache.txt from build directory and reload project. This happens because CMake is caching global variables

Upvotes: 7

ToyAuthor X
ToyAuthor X

Reputation: 325

You may open up cmake gui.It can show you every each option value. The option value in build folder may different with default value.

Recheck your CMakeLists.txt file. Maybe somewhere you set value on it.

cmake_minimum_required(VERSION 2.8)
OPTION(FOO "Foo Option" OFF)
SET(FOO ON)                   # Don't do this
MESSAGE("FOO? " ${FOO})

Upvotes: 4

Korbi
Korbi

Reputation: 764

Try this:

SET(FOO OFF CACHE BOOL "Foo Option")

or

SET(FOO OFF CACHE BOOL "Foo Option" FORCE)

Upvotes: 4

Related Questions