[Discuss-gnuradio] Illegal CustomBuild for MSVC 18

[Gisle Vanem]

I have had some more success building Gr using MSVC v18
than MSVC v16 previously (nearly impossible). Besides the
high noise-level (due to cmake/msvc/config.h), the C++ building
seems fine.

But the build stops in 'build\gnuradio-runtime\swig'
at some CustomBuild/CustomCommand. Here is from the MSbuild
output:

  if %errorlevel% neq 0 goto :cmEnd
  :cmEnd
  endlocal & call :cmErrorLevel %errorlevel% & goto :cmDone
  :cmErrorLevel
  exit /b %1
  :cmDone
  if %errorlevel% neq 0 goto :VCEnd
  setlocal
  ""         << !! because of this
  if %errorlevel% neq 0 goto :cmEnd
  :cmEnd
  endlocal & call :cmErrorLevel %errorlevel% & goto :cmDone
  :cmErrorLevel
  exit /b %1
  :cmDone
  if %errorlevel% neq 0 goto :VCEnd
  setlocal
  ""
  if %errorlevel% neq 0 goto :cmEnd
  :cmEnd
  endlocal & call :cmErrorLevel %errorlevel% & goto :cmDone
  :cmErrorLevel
  exit /b %1
  :cmDone
  if %errorlevel% neq 0 goto :VCEnd
  Building Custom Rule 
F:/gv/dx-radio/gnuradio-3.x/gnuradio-runtime/swig/CMakeLists.txt

  '""' is not recognized as an internal or external command,


What command in 'gnuradio-runtime\swig\CMakeLists.txt' could trigger this
illegal CMD batch snippet?

BTW. I generated the .sln/.vcxproj files by a script:
  setlocal
  cd build
  set OPT=-DCMAKE_CXX_COMPILER=cl -DCMAKE_C_COMPILER=cl ^
        -DCMAKE_CXX_COMPILER_ENV_VAR=-nologo -O2 -MD ^
        -DCMAKE_C_COMPILER_ENV_VAR=-nologo -O2 -MD ^
        -Wno-dev -DCMAKE_BUILD_TYPE="Release" -DENABLE_TESTING=1 ^
        
-DPORTAUDIO_LIBRARIES=%MINGW32%/src/Sound/Portaudio/lib/portaudio_static_x86.lib

  cmake %OPT% -G "Visual Studio 12 2013" ..
  ...

--
--gv