[QGIS-Developer] MingW64 Windows 64bit Build action failing: a possible workaround

[Andrea Giudiceandrea]

Hi devs,
the MingW64 Windows 64bit Build action is continuously failing since a 
couple of days with the following error:

/usr/bin/mingw64-cmake: line 92: fg: no job control

The issue is caused by the %__cmake macro not correctly evaluated and 
misinterpreted.

A possible workaround, which I've tested and which makes the action no 
longer fail and the build succeed, would be to change line 79 of 
/ms-windows/mingw/build.sh from

   mingw$bits-cmake \

to

   rpm --eval "%{mingw64_cmake}" > mingw64-cmake.sh
   sed -i -e 's/%__cmake/cmake/' mingw64-cmake.sh
   chmod +x mingw64-cmake.sh
   ./mingw$bits-cmake.sh \


See 
https://gitlab.gnome.org/TinyTrebuchet/gtk/-/blob/main/.gitlab-ci.yml#L156-158

It's not clear to me what actually triggered the issue, so very likely 
there is a better fix.

Best regards.

Andrea