Fix mingw CI

[kleisauke]

No description provided.

[farindk]

Yes, I tried something like that (see mingw-ci-test branch). I gave up on the cmake errors...

[farindk]

We might need -mconsole to build a console-only Windows application.

[kmilos]

May I suggest again switching the MinGW CI to "native" MSYS2 instead of cross-building like this? There are almost no extra codecs packaged on Linux for MinGW, so this job is not really covering most of the libheif code and features, and IMHO its added value is thus questionable...

=== Summary of compiled codecs ===
libde265 HEVC decoder           : - not found
FFMPEG HEVC decoder (HW acc)    : - not found
x265 HEVC encoder               : - not found
Kvazaar HEVC encoder            : - not found
AOM AV1 decoder                 : - not found
AOM AV1 encoder                 : - not found
Dav1d AV1 decoder               : - not found
SVT AV1 encoder                 : - not found
Rav1e AV1 encoder               : - not found
JPEG decoder                    : - not found
JPEG encoder                    : - not found
OpenH264 decoder                : - not found
OpenJPEG J2K decoder            : - not found
OpenJPEG J2K encoder            : - not found
OpenJPH HT-J2K encoder          : - not found
uvg266 VVC enc. (experimental)  : - disabled
vvenc VVC enc. (experimental)   : - not found
vvdec VVC dec. (experimental)   : - not found

[farindk]

@kmilos Yes, the mingw build has always been a PITA and I also don't see the use of it. Having an msys2 build would definitely be more useful, but I don't know enough about it to set it up. If you have a script for that, it would be much appreciated.

BTW: Also many other CI checks look very outdated. In my view, we should do on each architecture a release build, a test build, once with plugins and once without.

[kleisauke]

FWIW, the Wine error happened because two GCC threading libraries (POSIX and Win32) were mixed. 😅

This PR was just to make the tree green again, I'm fine with removing it in favor of an MSYS2-based variant.

[farindk]

Incredible, I would never have found that... Thanks a lot.

[kmilos]

Could potentially add "libz-mingw-w64" (i686 and x86-64 below) as the only other pre-built package available on Ubuntu, for e.g. testing the header compression in addition...

[farindk]

I tried to add the libz-mingw-w64(-dev) packages 0589ee3
But libz did not get picked up (https://github.com/strukturag/libheif/actions/runs/13634673899/job/38110364111). Any idea why?

[kmilos]

Hm, I was hoping it'd work OOTB... Maybe needs explicit setting of export PKG_CONFIG_PATH=/usr/i686-w64-mingw32/lib/pkgconfig (and similarly for x86_64)? In any case, more trouble than gain as we established at this point...

[kleisauke]

Feel free to cherry-pick commit kleisauke@66826a2 for that. :)

[kmilos]

And instead of setting all of these variables/options (CC, CXX, CMAKE_SYSTEM_NAME, CMAKE_FIND_ROOT_PATH) manually in each script, a cross toolchain file should really be used w/ CMake if building from Linux, e.g. https://www.mingw-w64.org/build-systems/cmake/#cross-compiling-on-linux

All of this of course is irrelevant if/when switching to MSYS2, which is native.

[farindk]

@kleisauke Thanks again. I've cherry-picked it.