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From: Simon Wright <simon@pushface.org>
Newsgroups: comp.lang.ada
Subject: Re: gnat via msys2 pacman + xml/ada
Date: Wed, 19 Sep 2018 15:54:39 +0100
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Date: 2018-09-19T15:54:39+01:00
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Björn Lundin <b.f.lundin@gmail.com> writes:

> gprbuild -j0 -m -p -XLIBRARY_TYPE=relocatable -XBUILD=Production
> -XPROCESSORS=0 xmlada.gpr
> Build Libraries
>    [gprlib]       xmlada_unicode.lexch
>    [link library] libxmlada_unicode.dll
> d:/apps/tools/mingw2/mingw64/bin/../lib/gcc/x86_64-w64-mingw32/8.2.0/../../../../x86_64-w64-mingw32/bin/ld.exe:
> D:\apps\tools\MinGW2\xmlada_tmp\tags\xmlada-4.6.1\unicode\obj\relocatable\unicode-ccs-iso_8859_1.o:unicode-ccs-iso_8859_1.adb:(.text+0x54):
> undefined reference to `system__img_uns__set_image_unsigned'

etc - I've no idea how to go about fixing this Windows/mingw problem,
other than to try to sidestep it by not trying to build the shared
(relocatable) library (try configuring with --disable-shared).

You shouldn't need to rebuild gprbuild, not sure why anyone's suggesting
it.