[Mingw-cross-env-list] Help narrowing down a build error depending on plattform

[Simon Frei]

Hi,

I am working on digikam, which does it's windows build with mxe. I
compile on debian stretch and get a spurious error, while it works just
fine for the lead dev Gilles on mageia. We couldn't work out what might
cause it.
As part of the whole process lensfun is built. In my case this fails due
to GLIB2_DLL not being set. The actual file libglib-2.0-0.dll is
present, it is just not picked up during configuration. For Gilles the
relevant output is

    --
    Using:
    -- GLIB2 include dir:
/mnt/devel/GIT/5.x/project/bundles/mxe/build.win32/usr/i686-w64-mingw32.shared/include/glib-2.0;/mnt/devel/GIT/5.x/project/bundles/mxe/build.win32/usr/i686-w64-mingw32.shared/lib/glib-2.0/include;/mnt/devel/GIT/5.x/project/bundles/mxe/build.win32/usr/i686-w64-mingw32.shared/include
    -- GLIB2 library: glib-2.0;intl
    -- GLIB2 DLL:
/mnt/devel/GIT/5.x/project/bundles/mxe/build.win32/usr/i686-w64-
    mingw32.shared/bin/libglib-2.0-0.dll
    -- Configuring done

where in my case the line about GLIB_DLL is missing (full output:
http://pastebin.com/39kEW80q).

The weird thing is that we both work on clean version controlled folders
and AFAIK all tools involved are compiled by mxe, so I really don't
understand where this discrepancy comes up.

Some additional info: The relevant makefile is
https://cgit.kde.org/digikam-software-compilation.git/tree/project/bundles/3rdparty/ext_lensfun/CMakeLists.txt
and is called by
https://cgit.kde.org/digikam-software-compilation.git/tree/project/bundles/mxe/01-build-mxe.sh#n173
The digikam issue where this came up is
https://bugs.kde.org/show_bug.cgi?id=374313

I am aware this report isn't very concise, but I would really appreciate
it if you can come up with any ideas how to narrow this down - thanks in
advance.

Cheers,
Simon