Re: [fltk.general] MSVC 2019 cmake issue? - Forums

On 9/30/22 11:13 Ian MacArthur wrote:

This pretty much comes under the "I should know this" banner, but I'm having trouble getting cmake to generate a MSVC sln file for fltk-1.4 just now.

Seems you *know* this, but sorry, the failed build is my fault. See below.

Now, as is well known, I'm not really an IDE sort of person, but for *reasons* I need to generate a MS binary.

No problem, I have a machine with MSVC 2019 installed (which TBH is for my kid to play with Unity and C#, so not really my thing...)

Anyway, fire up a "Developer command prompt" from MSVC and run a sensible looking (to me, anyway) cmake invocation:

cmake -G "Visual Studio 16 2019" -D CMAKE_BUILD_TYPE=Release -A x64 ..

I'm always using the default build w/o `-A ...` because I can never remember the allowed attribute values (same as for `-T ...`, BTW). But this has nothing to do with the build failure.

Fails with:

-- Configuring incomplete, errors occurred!
See also "D:/Tools/Ian/fltk-1.4/build-msvc/CMakeFiles/CMakeOutput.log".
See also "D:/Tools/Ian/fltk-1.4/build-msvc/CMakeFiles/CMakeError.log".

and no fltk.sln is created. Also says...

CMake Error at documentation/CMakeLists.txt:60 (string):
string sub-command REGEX, mode REPLACE needs at least 6 arguments total to
command.

This looks like CMake can't retrieve the doxygen version, resulting in one argument of the `string (REGEX REPLACE ...` command being empty. This should be checked in the CMake file. Thanks for your report, I'll look into it...

Recalling that NSVC now supports cmake directly I tried that "GUI" way too, but it failed in the same way.

That's no surprise but thanks for trying it.

In the same repo., if I spin up an Msys shell and do my usual:

cmake -G "MSYS Makefiles" -D CMAKE_BUILD_TYPE=Release ..

That all just works and builds.

Maybe the MSYS build finds doxygen?

What do I need to do differently for MSVC builds? I assume this generally works and I'm being foolish here...

No, don't worry, it's not your fault. You *shouldn't* have to do anything differently, except the system specific build options, of course.

That said, just for my information: can you please tell me if doxygen was found in *both* builds? You can post the output of the following command in the respective build directories (the output below is from my Linux system):

$ grep '^DOXYGEN' CMakeCache.txt 
DOXYGEN_DOT_EXECUTABLE:FILEPATH=/usr/bin/dot
DOXYGEN_EXECUTABLE:FILEPATH=/usr/local/doxygen-1.9.1/bin/doxygen
DOXYGEN_DOT_EXECUTABLE-ADVANCED:INTERNAL=1
DOXYGEN_EXECUTABLE-ADVANCED:INTERNAL=1

Note: DOXYGEN in capitals, or use 'grep -i'.

TIA

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