[CMake] Link flags not applied to static library

[Ben Medina]

So that the answer stays on the list:

One must use the STATIC_LIBRARY_FLAGS property, rather than
LINK_FLAGS, for static libraries.

On Tue, Jun 21, 2011 at 3:12 PM, Ben Medina <ben.medina at gmail.com> wrote:
> Since I got no feedback, I assume it's a bug. I've filed it here:
>
> 0012295: LINK_FLAGS_RELEASE has no effect on static libraries for MSVC
> generators
>
> http://www.cmake.org/Bug/view.php?id=12295
>
> On Mon, Jun 13, 2011 at 11:50 AM, Ben Medina <ben.medina at gmail.com> wrote:
>> Hello all,
>>
>> I'm using CMake 2.8.4 and am seeing an odd differenc between static
>> and shared libraries in regard to the LINK_FLAGS property. In
>> particular, I'm enabling "Whole program optimization" in Visual Studio
>> 2010, which is done by add /GL as a compiler flag and /LTCG as a
>> linker flag for the release configuration. However, the link flag is
>> not used for static libraries, leading to a build warning about
>> compiling with /GL but linking without /LTCG.
>>
>> Here's an example:
>>
>> cmake_minimum_required (VERSION 2.8)
>> project (link_test)
>>
>> set (CMAKE_CXX_FLAGS_RELEASE "${CMAKE_CXX_FLAGS_RELEASE} /GL")
>>
>> add_library (static_test STATIC a.cpp)
>> set_target_properties (
>>    static_test
>>    PROPERTIES
>>    LINK_FLAGS_RELEASE "/LTCG"
>>    )
>>
>> add_library (shared_test SHARED a.cpp)
>> set_target_properties (
>>    shared_test
>>    PROPERTIES
>>    LINK_FLAGS_RELEASE "/LTCG"
>>    )
>>
>> Just add an empty file called a.cpp to the directory, then build the
>> whole project in release configuration. You'll get a warning like this
>> for the static_test library:
>>
>> 2>  a.obj : MSIL .netmodule or module compiled with /GL found;
>> restarting link with /LTCG; add /LTCG to the link command line to
>> improve
>>
>> Why is CMake not applying LINK_FLAGS_RELEASE to the static library?
>>
>> Thanks,
>> Ben
>>
>