[CMake] How to use 'CMAKE_EXE_LINKER_FLAGS' correctly

[Chuck Atkins]

Is there a reason to not use target_link_libraries here? For the purposes
of your example there's no reason to be using CMAKE_EXE_LINKER_FLAGS.  What
are you actually trying to accomplish? Because there is almost certainly a
better way to achieve your desired result than via CMAKE_EXE_LINKER_FLAGS.

- Chuck

On Fri, May 20, 2016 at 4:28 AM, Chaos Zhang <zcsd2012 at gmail.com> wrote:

> Hi, all,
>
> I try to use some gcc link option and libs(except libs link by
> target_link_libraries(...)), i researched and try to use
> 'CMAKE_EXE_LINKER_FLAGS' in a simple project, as below:
> in dir, there are 5 files:
>
> -hello.h
> -hello.c
> -main.c
> -hello.o
> -libhello.a
>
> hello.o was compiled by hello.c(gcc -c hello.c) and libhello.a contained
> hello.o. And other 3 files content:
> 1.In hello.h:
>
> void hello();
>
> 2.In hello.c:
>
> #include<stdio.h>
> void hello()
> {
>     printf("hello\n");
> }
>
> 3.In main.c:
>
> #include "hello.h"
> void main()
> {
>    hello();
> }
>
> When i used gcc -o main main.c libhello.a, the exe file: main generated,
> and
> it work well.
> Then i write a CMakeLists.txt, the content as below:
>
> set(CMAKE_EXE_LINKER_FLAGS "${CMAKE_EXE_LINKER_FLAGS} -L . -lhello")
> add_executable(main main.c)
>
> When i cmake&make this project, an error occurred: main.c:undefined
> reference to 'hello'.
>
> Since i wil add a complicated link option and would not conflict with  libs
> link by target_link_libraries(...), i should figure out how to use
> 'CMAKE_EXE_LINKER_FLAGS' or other ways, could you please give me some
> advices? :-)
>
> Thanks,
> Chao
>
>
>
> --
> View this message in context:
> http://cmake.3232098.n2.nabble.com/How-to-use-CMAKE-EXE-LINKER-FLAGS-correctly-tp7593495.html
> Sent from the CMake mailing list archive at Nabble.com.
> --
>
> 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
>
> Follow this link to subscribe/unsubscribe:
> http://public.kitware.com/mailman/listinfo/cmake
>
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://public.kitware.com/pipermail/cmake/attachments/20160520/fce5ff06/attachment.html>