[CMake] Build/Link with static libs

[Brad King]

Christian Lang wrote:
>> Christian Lang wrote:
>>> Alexander Neundorf schrieb:
>>> my first problem is solved: To link against "foo/libbar.a", the link 
>>> line options "-Lfoo -lbar" are produced. This works. But what if for 
>>> some reason I do not want to use it this way, but want to directly 
>>> specify "foo/libbar.a" at the link line (as I tried in the first 
>>> place)? Is this possible?
>>
>> You can specify the full path to libbar.a
>>
> Ok, but if I specify - for instance - "/path/foo/libbar.a" 
> (TARGET_LINK_LIBRARIES), cmake transforms it to "-L/path/foo -lbar" at 
> the link line ...

That's because on most platforms passing the full path to a static 
library causes the linker to copy the entire archive instead of just the 
objects needed.  CMake splits the path into -L and -l to avoid this 
problem, but it also computes a safe link directory order to make sure 
the library is found at the location specified.  It warns if no safe 
order exists.

-Brad