Cmake Set Option

However there are cases in which a normal non cached variable of the same name as the option may be defined by the project prior to calling the option command.

Cmake set option. I tried to set the options on top level cmakelists txt but nothing change. These settings enable you to set cmake variables and save them in cmakesettings json. Add executable myap main cpp dpdksock c snip i want to specify different compile options for the cpp and c files. I built opencv contrib and some of the modules are working however when i m trying to use surf i get.

The option command is typically used to create a cache entry to allow users to set the option. Set opencv enable nonfree cmake option and rebuild the library in function create. 213 the function feature is not implemented this algorithm is patented and is excluded in this configuration. Option honors normal variables.

How to set a cmake option at command line. This would lead to some strange behavior that the configuration between two cmake runs would be different. I m using the cmake version 3 15 5. Hi i have some link option as below.

In this case i d edit src cmakelists txt where the hello lib target is defined as that s where hello h belongs to. Additional command line options passed to rsync a fast and versatile file copying tool. My cmake project builds an executable consisting of c and c source files. How to set link option.

But when i make ccmake s project b build the options appears in default. Wl rpath project top dist proj a lib a a lb wl whole archive proj c lib c a question is how to set it into. After all it has nothing to do with catch so better leave the catch target as it is. For example a project that embeds another project as a subdirectory may want to hard.

When executing cmake configuration for the second time the option command would be ignored because there is already a value in the cache and the value from the set command would be used. They re passed to cmake at build time and override whatever values are in the cmakelists txt file. In this case the set command will add the type. Ask question asked 7 years ago.

Cmake variables and cache. If hello h is the file that uses a c 14 feature then the project where it belongs to should specify that requirement. I created a cmakelists txt that contains the following. Viewed 118k times 91.

So how can i enable nonfree. Hi chenli thanks for the question. For example compiling the cpp file requires the std c 11 flag but gcc does not recognise that flag and so it should not be used for the c file.