Re: Illegal CustomBuild for MSVC 18

I’ve also been struggling with the gnu-radio build in Windows (GNURadio, CMake 3.2.2, VisualStudio 12.0.31101.00 Update 4), and had the
same problem. The illegal “” commands seem to be coming from the custom
build steps for the “.rule” files in the projects starting with a “_”
(e.g. _pmt_swig). In each of these projects there is a “CMAKE Rules” dir
with “.rule” files that have “” in their custom build script.
I’ve found the learning curve for this build to be incredibly steep, I
also have no real understanding of the gnu-radio build process or the
authoring of CMake projects, but I managed to track this problem to the
following stanza in \cmake\Modules\UseSWIG.cmake
foreach(swig_gen_file ${${outfiles}})
OUTPUT ${swig_gen_file}
DEPENDS ${_target}

It seems that if you put something in the COMMAND “” quotes it is passed
into the custom build script without the quotes, but if you just put a
pair of empty double quoates as above, you get the double quotes in the
custom-build step and Visual Studio throws up the error. Removing or
commenting-out the COMMAND “” line above (then doing a CMake configure
and generate) seems to solve the problem.
I don’t know enough about CMake to know whether this is a bug in CMake
or a mistake in the GNURadio UseSWIG.cmake file, but I checked the
latest commit in the gnu-radio repo and the COMMAND “” line is stil in
the “UseSWIG.cmake” file. I also couldn’t find an open bug report about
this so I raised it as bug #799.

I encountered the same problem. No idea how to properly fix it, For
now, I just did a global replace in *.vcxproj for “” to nothing. That
worked and I was able to build everything.

Eugene Grayver, Ph.D.
Aerospace Corp., Sr. Eng. Spec.
Tel: 310.336.1274

From: [email protected]
To: [email protected],
Date: 03/31/2015 09:01 AM
Subject: Discuss-gnuradio Digest, Vol 148, Issue 34
Sent by: [email protected]

From: Gisle V.
Subject: [Discuss-gnuradio] Illegal CustomBuild for MSVC 18
Date: Tue, 31 Mar 2015 12:37:03 +0200
User-agent: Mozilla/5.0 (Windows NT 6.3; WOW64; rv:36.0) Gecko/20100101
Firefox/36.0 SeaMonkey/2.33.1
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
if %errorlevel% neq 0 goto :cmEnd
endlocal & call :cmErrorLevel %errorlevel% & goto :cmDone
exit /b %1
if %errorlevel% neq 0 goto :VCEnd
“” << !! because of this
if %errorlevel% neq 0 goto :cmEnd
endlocal & call :cmErrorLevel %errorlevel% & goto :cmDone
exit /b %1
if %errorlevel% neq 0 goto :VCEnd
if %errorlevel% neq 0 goto :cmEnd
endlocal & call :cmErrorLevel %errorlevel% & goto :cmDone
exit /b %1
if %errorlevel% neq 0 goto :VCEnd
Building Custom Rule
‘""’ is not recognized as an internal or external command,

What command in ‘gnuradio-runtime\swig\CMakeLists.txt’ could trigger
illegal CMD batch snippet?
BTW. I generated the .sln/.vcxproj files by a script:
cd build

cmake %OPT% -G “Visual Studio 12 2013” …