[CMake] find_package

[David Cole]

How do you do step 3) -- build boost?

Unless the build is done and installed and ready to find before the
end of step 3, there is still nothing (yet) there for the find_package
in step 4 to find...


David C.


On Fri, Apr 24, 2015 at 9:36 AM, matzeNOTAVAILABLE . <matze999 at gmail.com> wrote:
> Hi,
> i am struggling somewhat with find_package. I looked at the documentation
> and googled quite a bit, but i am still stuck. I alos tried stackoverflow to
> no avail.
>
> What i am trying to accomplish is the following:
> 1) See if my custom boost installation exists (using find_package)  (version
> 1.57)
> 2) If it does not -> build it
> 3) Use find_package again to find the newly built boost libs.
>
> This works up until but not including step 3.
>
> Something that it might be complicating matters (i am not sure) is that i
> have a system boost installation (1.54).
>
> 1) (... set boost_root ...)
> 2) FIND_PACKAGE(Boost 1.57 COMPONENTS log thread filesystem system)
> 3) (... build boost if it Boost_FOUND is 0)
> 4) FIND_PACKAGE(Boost 1.57 REQUIRED COMPONENTS log thread filesystem system)
>
> The second call to find_package does not find the boost installation and
> thus does not set include dirs etc... properly.
>
> I wonder why not?
>
> Any hints are greatly appreciated,
> Matt
>
>
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