[CMake] Specify the link command in CMake

[Federico Carminati]

Hello Eric,
   sorry for not having changed the subject, I realize it only now. Thanks for your answer. I am trying to use clang / clang++. This works if I do 

cmake $MY_SOURCE_DIRECTORY  -DCMAKE_C_COMPILER=clang  -DCMAKE_CXX_COMPILER=clang++ 

however CMake decides to use clang / clang++ as linker, and I need plain ld. However I am fine with all other flags and arguments. I would just like to have ld as linker command and not clang / clang++. I tried adding

 -DCMAKE_C_LINK_EXECUTABLE=ld \
 -DCMAKE_CXX_LINK_EXECUTABLE=ld

with the result that the whole linker command is now just what I specify as argument to CMAKE_<LANG>_LINK_EXECUTABLE, I do not even have the executable, object files and libraries any more. Thanks for help and best regards, 

Federico Carminati
CERN-PH 
1211 Geneva 23
Switzerland
Tel: +41 22 76 74959
Fax: +41 22 76 68505
Mobile: +41 76 487 4843

On 13 Sep 2011, at 10:56, Eric Noulard wrote:

> 2011/9/13 Federico Carminati <Federico.Carminati at cern.ch>:
>> Dear All,
>>   is there a way to specify the link command in CMake? If I specify
>> 
>> export LD=/usr/bin/ld ; cmake $MY_SOURCE_DIRECTORY
>> 
>> it is not taken and if I set
> 
> I dont' know if LD env var is supposed to be used at all.
> 
>> cmake $MY_SOURCE_DIRECTORY \
>> -DCMAKE_C_LINK_EXECUTABLE=ld \
>> -DCMAKE_CXX_LINK_EXECUTABLE=ld
>> 
>> what I observe is that the "entire" link command is replaced by "just" ld. Am I missing something?
> 
> What are you trying to do?
> Replacing the linker application while keeping the option of the one
> CMake would have chosen?
> Seems weird, if you change linker may be you should specify linker
> option as well, no?
> 
> This looks like "incomplete" cross compiling (see
> http://www.cmake.org/Wiki/CMake_Cross_Compiling)
> or unsupported compiler use.
> 
> May be you can explain us what you are trying to do.
> and please do not hijack unrelated thread for asking new question.
> 
> -- 
> Erk
> Membre de l'April - « promouvoir et défendre le logiciel libre » -
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