`target_compile_options()` not setting compile flags

Usage
1

For some reason target_compile_options() isn’t setting the compile flags for my target.

This is roughly what the CMake code looks like:

macro(internal_add_application)
  parse_arguments(${ARGV})
  add_executable(${PROJECT_NAME})
  ...
  target_compile_options(${PROJECT_NAME} PRIVATE -fsanitize=address,leak,undefined)
endmacro()

macro(add_application)
  internal_add_application(${ARGV})
  ...
endmacro()

I have no bright idea on what the problem here is.

2

Just for reference, I’m guessing this is related to the problem in this post?

How did you verify that the options weren’t set? Variables such as CMAKE_CXX_FLAGS will not be modified by target_compile_options, you’d have to check the actual options on the target via get_target_properties on property COMPILE_OPTIONS (or by checking the actual compiler calls in the output of a verbose build).

3

The flags are not in the target properties, I’ve checked with get_target_property() after that post. I literally have no idea why they aren’t being set.

get_target_property(cflags ${AVL_CURRENT_PROJECT_NAME} COMPILE_OPTIONS)
message("The project has set the following flags: ${cflags}")

And the warning flags, for example, get set.

4

The example code looks fine to me. I’d check cmake --trace-expand to make sure that your -fsanitize= flags are actually being added in the first place.

I’ll note that -fsanitize= usually needs passed to the linker as well to grab the right runtime library too.

5

It was my bad, something to do completely irrelevant to CMake. Sorry