[CMake] Link flags not applied to static library

[Paul Harris]

Hi,

I set this:

   set (STATIC_LIBRARY_FLAGS_RELWITHDEBINFO
"${STATIC_LIBRARY_FLAGS_RELWITHDEBINFO} /LTCG")

and it didn't seem to work.  MSVC still has no LTCG flag set for any of my
static libraries.

does this feature work?
cheers,
Paul


On 23 June 2011 01:02, Ben Medina <ben.medina at gmail.com> wrote:

> 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
> >>
> >
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