Hi.
The argument STATIC or SHARED is processed at CMake configure time (that
is, when CMake is executing the add_library() command). However, generator
expressions are only evaluated at generate time, which comes only after all
CMake code is processed.
Fortunately for you, compiler ID is something that is already known at
configure time, meaning you don't need to use a genex to read it. You can
just do this:
if(MSVC)
set(LibType STATIC)
else()
set(LibType SHARED)
endif()
add_library(
${_star_lib_name}
${LibType}
...
)
(Feel free to modify the if(), use CMAKE_<LANG>_COMPILER_ID (
https://cmake.org/cmake/help/latest/variable/CMAKE_LANG_COMPILER_ID.html)
etc. as necessary).
Petr
On Thu, 7 Nov 2019 at 12:28, David Aldrich <[email protected]>
wrote:
> I want to build a shared library for Linux and a static library for
> Windows. So I have tried:
>
> set (_star_lib_name "StdStars")
>
> add_library(${_star_lib_name}
> $<$<CXX_COMPILER_ID:GNU>:SHARED>
> $<$<CXX_COMPILER_ID:MSVC>:STATIC>
> ""
> )
>
> but that gives me error:
>
> CMake Error at
> C:/SVNProj/zodiac/branches/TRY_TML_CMake_3Oct2019/StarLibs/StdStars/CMakeLists.txt:7
> (add_library):
> Cannot find source file:
>
> STATIC
>
> Tried extensions .c .C .c++ .cc .cpp .cxx .cu .m .M .mm .h .hh .h++ .hm
> .hpp .hxx .in .txx
>
> What is the correct way of doing this please?
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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
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