[CMake] INSTALL CODE Error Results and Termination

[David Hauck]

Hi Kornel,
 
On Wednesday, November 13, 2013 10:26 AM, cmake-bounces at cmake.org wrote:
> Am Mittwoch, 13. November 2013 um 18:12:26, schrieb David Hauck 
> <davidh at netacquire.com>
>> Hello,
>> 
>> I've been using several "install (CODE "EXECUTE_PROCESS ...")"
>> constructs
> in my top-level CMakeLists.txt file. However, I've been unable to 
> capture/operate on any exit status of the embedded command.
> Unfortunately, documentation/searches haven't turned up any useful 
> pointers. The closest I've come is a pointer in the following thread:
>> http://www.cmake.org/pipermail/cmake/2011-July/045475.html However, 
>> I've not been able to sufficiently read between the lines to get this 
>> working.
>> 
>> Does anyone have any thoughts on how to get something like the 
>> following working:
>> 
>>    install (CODE "EXECUTE_PROCESS (
>>       COMMAND ant ...
>>       WORKING_DIRECTORY ${PROJECT_SOURCE_DIR}/java
>>       ERROR_VARIABLE _err
> 
> Didn't you mean 'RESULT_VARIABLE' here?

No, I really do mean ERROR_VARIABLE (unless, of course, this variable does not include the non-zero exit status of the EXECUTE_PROCESS command?).

BTW, I'm still curious about the (dual 'code') construct generally. Specifically, if I do the following I never see the fatal error message (so I'm wondering if there's still something wrong regarding the scoping of the message command)?
 
   install (CODE "EXECUTE_PROCESS (
      COMMAND ant ...
      WORKING_DIRECTORY ${PROJECT_SOURCE_DIR}/java
      ERROR_VARIABLE _err
   )
   MESSAGE( FATAL_ERROR \"err: ${_err}\")

BTW, the following doesn't work either (each of the variables is empty):

   install (CODE "EXECUTE_PROCESS (
      COMMAND ant ...
      WORKING_DIRECTORY ${PROJECT_SOURCE_DIR}/java
      OUTPUT_VARIABLE _out
      ERROR_VARIABLE _err
      RESULT_VARIABLE _res
   )
   Install (CODE "MESSAGE( STATUS \"out: ${_out}, err: ${_err}, res: ${_res}...\")")

-David

>>    )
>>    If (${_err})
>>       MESSAGE( FATAL_ERROR \"err: ${_err}\")
>>    endif ()")
>> Thanks!
>> -David
>> 
> 	Kornel