Cmake Set Compiler Define

First we will use cmake s option function to add a command line option when running the cmake command.

Cmake set compiler define. We ll keep the structure of part 1. Option use debug enter debug mode off now we can set this option to on when running cmake. Private and public items will populate the compile definitions property of target. Set to on or off value when gnu extensions for the given c standard are enabled.

Specifies compile definitions to use when compiling a given target the named target must have been created by a command such as add executable or add library and must not be an alias target. Also identifiers that begin with an underscore followed by an uppercase letter are reserved for the implementation. We could now go ahead and use the target compile options command to enable the warnings for each target individually. The named target must have been created by a command such as add executable or add library and must not be an imported target.

We can also use. Part2 main cpp cmakelists txt main cpp will not be changed from part 1 but we ll be tweaking cmakelists txt. Cmake s doc or modify one of the flag variables cmake cxx flags or cmake cxx flags configuration or set compile flags variable on the target. Compiler flags in this post we ll explore means of setting compiler flags.

However in my case i wanted to use gcc for normal compilation and intel compiler for my cmake project so method 1 was not suitable. Indeed method 1 and 2 listed in the faq are more elegant. Private and public items will populate the compile definitions property of target. However recently the command has been superseded by a more fine grained approach separate commands for compile definitions include directories and compiler options.

Specify compile definitions to use when compiling a given target. Then we ll use cmake s add definitions function to set the corresponding preprocessor flag in our c program. Alternatively you might use set property directory append property compile definitions gen outfiles set cmake c flags releasenooutfiles ugen outfiles and rely on the assumption that 1 the flags are mentioned after the compile definitions and 2 the last d u argument in the command line will take effect. We ve seen that we can figure out which compiler flags are being used through make verbose 1.

The interface public and private keywords are required to specify the scope of the following arguments. The interface public and private keywords are required to specify the scope of the following arguments. For a long time cmake had the add definitions command for this purpose. Thanks for sharing that.