E. Wing wrote:
But I was thinking about a corner case where the include and lib don't
share a common root. So that's what got me wondering about setting
multiple paths in my environemental variable:
export OPENTHREADS_DIR=/optional_libs:/optional_headers
I didn't expect this to work, but I was hoping I would be corrected.
You could expand that before the call to FIND_LIBRARY in your own cmake
code.
> 4) Finally, back to FIND_LIBRARY(FOO foo PATHS $ENV{FOO}),
> how do I make CMake search my system paths last. I want my $ENV{FOO}
> to be like an override, but my system installed stuff keeps getting
> found first, before my $ENV{FOO} is checked.
>
Again, back to the docs....
...
If NO_DEFAULT_PATH is specified, then no additional paths are added to
the search. If NO_DEFAULT_PATH is not specified, the search process is
as follows:
....
So, you can do this:
FIND_*(.... PATHS mystuff NO_DEFAULT_PATH) # first look with no
extra paths
FIND_*(....) # now look in all the default paths.
So here's the thing. I do want to search the default system paths, but
I want them searched last. My motivation is for automated/one-touch
That is exactly what the above code does. It will first search the
paths you gave
it in the version of FIND_* that has NO_DEFAULT_PATH. If it is not
found there
it will then search again in the FIND_* that does not have NO_DEFAULT_PATH.
The problem with the two step FIND_ using NO_DEFAULT_PATH is that I
need to modify all the official Find*.cmake packages that I use, and
not just the ones I control.
Then you should most likely use the CMAKE_* environment variables, they
are always searched first. So, just tell people to set CMAKE_LIBRARY_PATH,
CMAKE_INCLUDE_PATH to the extra places that you want searched first.
-Bill
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