CMake Compilation Flags

Question

I'm using CMake in a project of mine, and I would like to use a different set of optimization flags for each file. Some files contain code that I would like to optimize for space and others I would like to optimize for performance.

Is there anyway to do this using CMake? The only way I can currently imagine is using this:

set_property(SOURCE ${PROJECT_SOURCE_DIR}/src/bitmap.c APPEND_STRING COMPILE_FLAGS "/Wall /WX /O1")

I know there's ways to set the optimization flags for specific files, but will building in release or debug mode have an effect on this? I want to make sure I'm doing this in a way that isn't just some hack, otherwise I might just revert back to Make.

André · Accepted Answer · 2014-04-03 07:20:10Z

1

You can use the set_source_file_properties command. Take a look at all the properties available for source files and you will notice a COMPILE_DEFINITIONS and COMPILE_FLAGS property.

answered Apr 3, 2014 at 7:20

André

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2 Comments

André Over a year ago

But if you do set a build-type, you can check for that with CMAKE_BUILD_TYPE

Cameron Lowell Palmer Over a year ago

This is an important caveat. One should set CMAKE_BUILD_TYPE to the empty string to avoid accidentally having compile options added.

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