Cmake Set Variable Command Line

Options are boolean variables with possible values on off.

Cmake set variable command line. Options and variables are defined on the cmake command line like this. Cmake provides builtin command line tools through the signature cmake e command options run cmake e or cmake e help for a summary of commands. It is possible for the cache entry to exist prior to the call but have no type set if it was created on the cmake 1 command line by a user through the d var value option without specifying. The syntax for declaring a variable and setting it if it is not already set is.

To do this cmake should be passed the command line arg e. Options are boolean variables with possible values on off. If you want to set a variable from the command line cmake offers a variable cache. Any options after are not parsed by cmake but they are still included in the set of cmake argv n variables passed to the script including the itself.

Command line always overrides even if cache is already set. If you still have questions please ask a new question peter apr 1 at 15 29. I m also using a script right now for the builds because i have to set the whole toolchain via command line options. Set my cache variable value cache string description this will not replace an existing value.

Some variables are already here like cmake build type. Now let s look at cached variables. Cmake dvariable value path to hpx you can set a variable after the initial cmake invocation for changing its value. I also threw my build directory away between each test.

Variables customize how the build will be generated. Thanks for the advice however i ve already tried setting the compiler via environment variable and got the same result as setting it via cmake option dcmake c. Furthermore any normal variable binding in the current scope will be removed to expose the newly cached value to any immediately following evaluation. In case we execute self run in our source method the conan run log will be.

For the full list of such commands run cmake e help. A key ingredient in all cmake builds. Whatever is in set is the default meaning if not specified on the command line. In a build cached variables are set in the command line or in a graphical tool such as ccmake cmake gui and then written to a file called cmakecache txt.

Cmake can itself be used to run commands that can be used on all systems one of which is echo. Options and variables are defined on the cmake command line like this. Execute process command echo bar output variable foo in this particular case cmake offers a cross platform solution. Run a command line tool.

Cmake dvariable value path to hpx you can set a variable after the initial cmake invocation for changing its value.