[Bug 50039] New: Wine 5.18+ fails build on Ubuntu 18.04 with libwine.so Makefile symbolic link

[WineHQ Bugzilla]

https://bugs.winehq.org/show_bug.cgi?id=50039

Bug ID: 50039
           Summary: Wine 5.18+ fails build on Ubuntu 18.04 with libwine.so
                    Makefile symbolic link
           Product: Wine
           Version: 5.18
          Hardware: x86-64
                OS: Linux
            Status: UNCONFIRMED
          Severity: normal
          Priority: P2
         Component: build-env
          Assignee: [e-mail]
          Reporter: [e-mail]
      Distribution: ---

I make community bi-arch wine builds for the Star Citizen community (used by
others too due to high compatibility) on Ubuntu 18.04LTS using containers for
each arch, and I've noticed that since Wine 5.18 builds fail on 64bit due to
the following:

...
gcc -m64 -c -o dlls/msvcrtd/onexit.o /build/wine-git/dlls/msvcrt/onexit.c
-Idlls/msvcrtd -I/build/wine-git/dlls/msvcrtd \
  -I/build/wine-git/dlls/msvcrt -Iinclude -I/build/wine-git/include
-I/build/wine-git/include/msvcrt \
  -D__WINESRC__ -D_MT -D_MSVCR_VER=0 -D_REENTRANT -fPIC
-fasynchronous-unwind-tables -fno-builtin \
  -fshort-wchar -mabi=ms -Wall -pipe -fno-stack-protector -fno-strict-aliasing
\
  -Wdeclaration-after-statement -Wempty-body -Wignored-qualifiers
-Wshift-overflow=2 \
  -Wstrict-prototypes -Wtype-limits -Wunused-but-set-parameter -Wvla
-Wwrite-strings -Wpointer-arith \
  -Wlogical-op -gdwarf-2 -gstrict-dwarf -g -O2 -U_FORTIFY_SOURCE
-D_FORTIFY_SOURCE=0
rm -f /build/data64/build/lib64/libwine.so && ln -s libwine.so.1
/build/data64/build/lib64/libwine.so
LC_ALL=C sed -e 's,@bindir@,/build/data64/build/bin,g' -e
's,@dlldir@,/build/data64/build/lib64/wine,g' -e 's,@PACKAGE_STRING@,Wine
5.19,g' -e 's,@PACKAGE_VERSION@,5.19,g' /build/wine-git/tools/widl/widl.man.in
> tools/widl/widl.man || (rm -f tools/widl/widl.man && false)

LC_ALL=C sed -e 's,@bindir@,/build/data64/build/bin,g' -e
's,@dlldir@,/build/data64/build/lib64/wine,g' -e 's,@PACKAGE_STRING@,Wine
5.19,g' -e 's,@PACKAGE_VERSION@,5.19,g'
/build/wine-git/tools/winebuild/winebuild.man.in >tools/winebuild/winebuild.man
|| (rm -f tools/winebuild/winebuild.man && false)
ln: failed to create symbolic link '/build/data64/build/lib64/libwine.so': No
such file or directory
Makefile:221721: recipe for target 'libs/wine/install-dev' failed
make: *** [libs/wine/install-dev] Error 1
make: *** Waiting for unfinished jobs....

Switching to 19.10 fixes the issue, except that 19.10 is of course no longer
updated and 20.04 would break the compatibility I'm aiming for.

I'm presuming it's some sort of autotools error, but I don't understand
autotools much myself, nor how fixable this is.