[CMake] How to use 'CMAKE_EXE_LINKER_FLAGS' correctly

[Chaos Zhang]

Nice to see you again, Mr. Atkins. I was trying to add a very long gcc link
option to a ELF file, there are some options, like -whole-archive，
-rpath，and i don't known how to set in CMake, so i decided to use original
gcc option, is there better way to solve this?

Chuck Atkins wrote
> 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@

> > 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
>>
> 
> -- 
> 
> 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





--
View this message in context: http://cmake.3232098.n2.nabble.com/How-to-use-CMAKE-EXE-LINKER-FLAGS-correctly-tp7593495p7593503.html
Sent from the CMake mailing list archive at Nabble.com.