Mingw-w32 build passes on W7 but fails on W10

[slowphil]

I encounter a difference in building a mingw-w32 package in nominally identical, fresh MSYS2 setups: Building passes on W7 but it fails on W10. It's not an official MSYS2/MINGW package, but I still believe it is an unexpected difference in the toolchain behaviour.

I have recorded the output of the makepkg-mingw in the log files that I attach (I removed large chunks that showed no or only insignificant differences). The first significant difference occurs at line 112 of the shortened W10 log : The linker warns about not finding libraries, although they are definitely installed (installation is identical in W7 and W10, made by script), and the build aborts shortly after.
PKGBUILD.txt
win7-short.log
win10-short.log

[jeremyd2019]

I've been running into this issue a lot building packages with clang. It can be worked around by adding

export lt_cv_deplibs_check_method='pass_all'

to the start of the build() function. As for why this doesn't always break for mingw-w64 packages, that is still a mystery.

[slowphil]

Yes!
That does not really answer why the toolchain behaves differently on W7 and W10, but that solves the failure on W10. Thanks for the tip.