[CMake] Fwd: set_target_properties and language specific COMPILE_FLAGS

[Nicolas Bock]

The solution is to add the POSITION_INDENPENDENT_CODE target property
to the C and Fortran convenience library targets.

Thanks again for the help,

nick

On Mon, Aug 4, 2014 at 3:35 PM, Nicolas Bock <nicolasbock at gmail.com> wrote:
> Hi Chuck,
>
> I am building both static and shared libraries using the object files.
> After splitting the Fortran and C source as you suggest, I get the
> following linker error:
>
> /usr/lib/gcc/x86_64-pc-linux-gnu/4.7.3/../../../../x86_64-pc-linux-gnu/bin/ld:
> CMakeFiles/spammpack-serial-C.dir/spamm_get_time.c.o: relocation
> R_X86_64_32 against `.rodata' can not be used when making a shared
> object; recompile with -fPIC
>
> Unfortunately I can't reproduce this error with a smaller test. Should
> I pass some additional compiler flags into the OBJECT convenience
> library, such as -fPIC as is suggested by the linker? How portable
> would that be?
>
> Thanks already,
>
> nick
>
> On Fri, Aug 1, 2014 at 12:37 PM, Chuck Atkins <chuck.atkins at kitware.com> wrote:
>> Hi Nick,
>>
>> You could split your target in to two object libraries that combine into a
>> singe "real" library:
>>
>> add_library(foo_f OBJECT ${FOO_F_SOURCES})
>> # set necessary compile flags specific to the Fortran components
>> # on the foo_f target
>>
>> add_library(foo_c OBJECT ${FOO_C_SOURCES})
>> # set necessary compile flags specific to the C components
>> # on the foo_c target
>>
>> # Combine into a "real" library
>> add_library(foo $<TARGET_OBJECTS:foo_f> $<TARGET_OBJECTS:foo_c>)
>>
>> See http://www.cmake.org/Wiki/CMake/Tutorials/Object_Library
>>
>> - Chuck
>>
>>
>> On Fri, Aug 1, 2014 at 12:54 PM, Nicolas Bock <nicolasbock at gmail.com> wrote:
>>>
>>> Hi,
>>>
>>> I am building a library containing Fortran and C sources. I would like
>>> to add language specific compile flags without affecting the global
>>> compile flags:
>>>
>>> set_target_properties( foo PROPERTIES C_FLAGS "-fopenmp" Fortran_FLAGS
>>> "-openmp" )
>>>
>>> However, it seems there is only COMPILE_FLAGS which presumably affects
>>> both languages.
>>>
>>> Thanks already,
>>>
>>> nick
>>> --
>>>
>>> Powered by www.kitware.com
>>>
>>> Please keep messages on-topic and check the CMake FAQ at:
>>> http://www.cmake.org/Wiki/CMake_FAQ
>>>
>>> Kitware offers various services to support the CMake community. For more
>>> information on each offering, please visit:
>>>
>>> CMake Support: http://cmake.org/cmake/help/support.html
>>> CMake Consulting: http://cmake.org/cmake/help/consulting.html
>>> CMake Training Courses: http://cmake.org/cmake/help/training.html
>>>
>>> Visit other Kitware open-source projects at
>>> http://www.kitware.com/opensource/opensource.html
>>>
>>> Follow this link to subscribe/unsubscribe:
>>> http://public.kitware.com/mailman/listinfo/cmake
>>
>>