[CMake] Passing options into COMMAND inside of add_custom_target() or add_custom_command()

[Hendrik Sattler]

On 28. Juni 2014 18:00:52 MESZ, Kornel Benko <kornel at lyx.org> wrote:
>Am Samstag, 28. Juni 2014 um 12:06:56, schrieb Martin Mitáš
><mity at morous.org>
>> 
>> Hello,
>> 
>> I'm trying to pass multiple options from outside to a command in
>add_custom_target() 
>> or add_custom_command(). I am new to CMake and I don't know whether
>the observed
>> behavior is bug or I do it in a wrong way.
>> 
>> I am doing all this with CMake 3.0 on Windows within MSYS environment
>if it
>> plays some role.
>> 
>> A test demonstrating the issue follows (using 'ls' as the command and
>'-l -h' 
>> as the options):
>> 
>> # ==== CMakeLists.txt ====
>> cmake_minimum_required(VERSION 3.0)
>> project(test_project)
>> 
>> set(MYTOOL "ls")
>> 
>> add_custom_target(
>>     x ALL
>>     COMMAND ${MYTOOL} ${MYTOOL_FLAGS}
>>     COMMENT "test"
>>     VERBATIM
>> )
>> # ==== End of CMakeLists.txt ====
>> 
>> 
>> Using the CMakeLists.txt above, I get this:
>> 
>> $ mkdir build  &&  cd build
>> $ cmake -G "MSYS Makefiles" -DMYTOOL_FLAGS="-l -h" ..
>> ... (unimportant output censored)
>> $ make VERBOSE=1
>> ... (unimportant output censored)
>> [100%] test
>> ls "-l -h"
>> ls: invalid option --
>
>So 'ls' got '-l -h' as one paramater.
>I would use
>1.) -DMYTOOL_FLAGS="-lh"
>
>or
>2.) -DMYTOOL_FLAGS="-l;-h"

Or maybe escaping on the shell as
"-DMYTOOL_FLAGS=-l -h"
also works?

>> Try `ls --help' for more information.
>> make[2]: *** [CMakeFiles/x] Error 2
>> make[2]: Leaving directory `/prj/pok/build'
>> make[1]: *** [CMakeFiles/x.dir/all] Error 2
>> make[1]: Leaving directory `/prj/pok/build'
>> make: *** [all] Error 2
>> 
>> 
>> As can be seen, CMake propagates the contents of ${MYTOOL_FLAGS} as a
>single 
>> option into 'ls', i.e. generated Makefile attempts to execute
>> 
>> 	ls "-l -h"
>> 
>> instead of
>> 
>> 	ls -l -h
>> 
>> Any ideas how to do this correctly?
>> 
>> Thanks,
>> Martin
>> 
>
>	Kornel
>
>------------------------------------------------------------------------

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