[CMake] Empty ERROR_VARIABLE in execute_process

[Roman Wüger]

Hello,
 
when I run qmllint from the command line to test an error I get:
 
C:\Tests>C:\Qt\5.6\msvc2015\bin\qmllint.exe test.qml
test.qml:1 : Syntax error
 
C:\Tests>echo %ERRORLEVEL%
-1
 
C:\Tests>
 
 
If I call this from a CMake script
 
execute_process(COMMAND C:/Qt/5.6/msvc2015/bin/qmllint.exe C:/Tests/test.qml
                RESULT_VARIABLE _resVar
                OUTPUT_VARIABLE _outVar
                ERROR_VARIABLE _errVar
              OUTPUT_STRIP_TRAILING_WHITESPACE
                ERROR_STRIP_TRAILING_WHITESPACE)
 
message("_resVar: ${_resVar}")
message("_outVar: ${_outVar}")
message("_errVar: ${_errVar}")
 
The output is:
 
1>  _resVar: -1
1>  _outVar:
1>  _errVar:
 
It seems that the error pipe isn’t read correctly, because _errVar is empty.

And hints?

Regards
Roman