Dear All,
I'm stumped on the following, seemingly simple issue.
I need to figure out in my configuration whether a given header file will be
available when I'll try to build my library, or not. So that I could set a
particular definition for the compiler according to whether the file is
available or not.
The complication is that I use generator expressions very heavily in setting up
the compilation flags of the library in question. So at configuration time I
don't even know yet all the include directories that I should be looking in to
find that header. That only becomes known after the generation step.
But as far as I can tell, check_include_files(...) can only run during the
configuration step. So relying on generator expressions in setting up its
include directories is not an option.
Is there any other possibility of making such a check, during the generation
step? Or is there some other mechanism that I could use to do this check during
the build itself? (After all, it could be a solution to generate a
configuration header with this information during the build itself...)
Cheers,
Attila
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