[CMake] CMAKE_EXE_LINKER_FLAGS for shared libraries?

[Robert Dailey]

Thanks for the info. It's a bit disappointing that it doesn't work like I
expect. The CMAKE_MFC_FLAG should work as you say the link flags should,
but it does not. As long as CMAKE_MFC_FLAG is set before I create my
target, it works. Since CMAKE_SHARED_LINK_FLAGS does not work the same, I
consider this a bug. There is no reason for it to exist up to the end of
the file... it should only exist up to the call to create the target. For
example, if I want to have 2 calls to add_library() in the same file, but
specify link flags differently for each, how am I expected to do this
without using the target specific property?

---------
Robert Dailey


On Mon, Dec 12, 2011 at 11:26 PM, Michael Wild <themiwi at gmail.com> wrote:

> It needs to exist **at the end** of the CMakeLists.txt file containing
> the target. If you don't want to do that (or can't, as in your case),
> you can use the LINK_FLAGS target property instead.
>
> HTH
>
> Michael
>
> On 12/12/2011 11:39 PM, Robert Dailey wrote:
> > I have attached a small CMake project that reproduces the issue I'm
> > referring to. Please take a look :)
> >
> > ---------
> > Robert Dailey
> >
> >
> > On Mon, Dec 12, 2011 at 4:11 PM, Robert Dailey <rcdailey at gmail.com
> > <mailto:rcdailey at gmail.com>> wrote:
> >
> >     I forgot to say that the main issue is that my /NODEFAULTLIB link
> >     flag isn't showing up in visual studio.
> >
> >     ---------
> >     Robert Dailey
> >
> >
> >
> >     On Mon, Dec 12, 2011 at 4:10 PM, Robert Dailey <rcdailey at gmail.com
> >     <mailto:rcdailey at gmail.com>> wrote:
> >
> >         Another issue...
> >
> >         At what point is it most important for the values of
> >         CMAKE_SHARED_LINK_FLAGS to exist? I set the value of this
> >         variable before my call to add_library(), however after that at
> >         some point the flags will get reverted because I'm stepping out
> >         of function scope. Does it need to exist up to the end of the
> >         current cmake script? My flow is basically this (pseudo call
> stack):
> >
> >         Enter CMakeLists.txt
> >         - Call define_project() function (in a separate cmake module)
> >         - - Call ignore_libs() function
> >         - - - Set CMAKE_SHARED_LINK_FLAGS with PARENT_SCOPE
> >         - - Call create_target() function
> >         - - - Call add_library() command
> >         Leave CMakeLists.txt
> >
> >         I've done some testing and I find that before the call to
> >         add_library(), my flags are setup properly in the
> >         CMAKE_SHARED_LINK_FLAGS variable.
> >
> >         ---------
> >         Robert Dailey
> >
> >
> >
> >         On Mon, Dec 12, 2011 at 2:20 PM, Michael Wild <themiwi at gmail.com
> >         <mailto:themiwi at gmail.com>> wrote:
> >
> >             On 12/12/2011 09:13 PM, Robert Dailey wrote:
> >             > On Mon, Dec 12, 2011 at 2:10 PM, David Cole
> >             <david.cole at kitware.com <mailto:david.cole at kitware.com>
> >             > <mailto:david.cole at kitware.com
> >             <mailto:david.cole at kitware.com>>> wrote:
> >             >
> >             >     Apparently, they are undocumented, but there are also:
> >             >
> >             >     CMAKE_SHARED_LINKER_FLAGS and
> >             CMAKE_MODULE_LINKER_FLAGS (and their
> >             >     per-config variants) for SHARED and MODULE library
> >             targets as well.
> >             >
> >             >     Use CMAKE_SHARED_LINKER_FLAGS instead.
> >             >
> >             >
> >             > Thanks for the information guys. I'm having a minor
> >             problem with these
> >             > variables though.
> >             >
> >             > Here is how I use it:
> >             >
> >             > set( CMAKE_SHARED_LINKER_FLAGS ${CMAKE_SHARED_LINKER_FLAGS}
> >             > /NODEFAULTLIB:\"${lib}\" )
> >             >
> >             > Prior to calling the set above, the shared linker flags
> >             look like this:
> >             >
> >             >  /STACK:10000000 /machine:X86
> >             >
> >             > After calling the set above, it looks like this:
> >             >
> >             >   /STACK:10000000 /machine:X86 ;/NODEFAULTLIB:"LIBC"
> >             >
> >             > For some reason a semi-colon is being inserted prior to the
> >             > /NODEFAULTLIB part. I don't know why this is happening but
> >             visual studio
> >             > is complaining about it. Any reason why this is happening?
> >             Thanks.
> >             >
> >
> >             That's how CMake works.
> >
> >             set(VAR val1 val2 val3)
> >
> >             defines a *list* where the elements are separated by a
> >             semi-colon (;).
> >             To prevent that, quote the assignment:
> >
> >             set(VAR "val1 val2 val3")
> >
> >
> >             Michael
> >
> >             --
> >
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> >
> >
> >
>
>
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