[CMake] Add external static libraries / ar-archives to a build.

[Mathieu Malaterre]

On Tue, Oct 21, 2008 at 10:54 AM, Paul Harris <harris.pc at gmail.com> wrote:
> snip
>
>> >>>  cmake -DBLAS=/path/to/lib/libgoto.a PATH_TO_SOURCE
>> >>>
>> >>> If I link the lib manually I enter
>> >>> gcc -o output myfile.c /path/to/lib/libgoto.a
>> >>
>> >>FIND_PACKAGE(BLAS REQUIRED)
>> >>
>> >>ADD_EXECUTABLE(output myfile.c)
>> >>TARGET_LINK_LIBRARIES(output ${BLAS_LIBRARIES})
>>
>
> snip
>
>>
>> > In my opinion the best way is to pass the right file as parameter. The
>> > cause is that the choose of the blas implementation is very important to
>> > solve the problems as fast as possible and so I want an easy way to switch
>> > which blas is used.
>>
>> Either run it via ccmake and changed whatever option is "wrong".
>> reading the code of FindBLAS.cmake there is apparently a subtle
>> mechanism which rely on the setting of "BLA_VENDOR", change this value
>> until you are happy with cmake system inspection (neither did I wrote
>> this module, nor did I ever used it...)
>
>
> I am in a vaguely similar position, and I can understand the desire to
> specify the library on the command line (so that you can configure via a
> selection of scripts that call cmake), rather than having to manually edit
> the properties in ccmake.
>
> Maybe instead, is it possible to set the value of BLAS_LIBRARIES via the
> command line?  You would probably also want to set BLAS_INCLUDES too in case
> you have different headers as well.
>
> At the end of the day, FIND_PACKAGE()'s goal is to set the values of
> numerous "standard" variables (eg BLAS_LIBRARIES)... so if you can do a
> better job than cmake's automatic package finding tool, then it might be
> easier to just specify the required variables yourself and remove the
> FIND_PACKAGE call entirely.
>
>
>
>

Looks like a feature request, I can find the cmake maintainer for blas here:

http://www.vtk.org/Wiki/CMake:Module_Maintainers

Just report a feature request at http://cmake.org/Bug

Thanks,
-- 
Mathieu