[CMake] FindBoost: find both win32 and x64 static libs

[Philip Lowman]

On Sunday, December 5, 2010, Hicham Mouline <hicham at mouline.org> wrote:

 > I've built both win32 and x64 versions of boost thread library with the
> following 2 lines:
>
> 1. 32bit cl.exe from msvc9 directory in the %PATH%
> bjam --with-thread --layout=versioned toolset=msvc address-model=64
> variant=release link=static threading=multi runtime-link=shared
>
> 2. 64bit cl.exe from msvc9 directory in the %PATH%
> bjam --with-thread --layout=versioned toolset=msvc address-model=64
> variant=release link=static threading=multi runtime-link=shared
>
> however, the resulting .lib files have identical names however:
> libboost_thread-vc90-mt-1_44.lib
> libboost_thread-vc90-mt.lib
>
> Dmytro, there is no distinction between 32bit and 64bit. The 64bit lib
size
> is approximately double the 32bit lib.
>
> boost-build, how to change this to include the bitness in the boost lib
> name?
> If it's impossible, Philip, perhaps FindBoost could be changed to allow
for
> different directories under BOOST_ROOT for the lib directories, something
> like lib\win32 and lib\x64 or whatever names can be agreed on.

If the user is compiling 32-bit code I could make FindBoost search "lib32"
before "lib" and for 64-bit code I can make it search "lib64" before "lib".
 If the user had an empty lib64 directory for some reason, it would still
find the boost libraries in "lib".

Would this work for you?

The BOOST_LIBRARYDIR variable is the only other workaround I can think to
this issue.
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