Even after patches by Michael Cronenworth and me, cf.
�� https://www.winehq.org/pipermail/wine-devel/2020-January/157945.html
�� https://www.winehq.org/pipermail/wine-devel/2020-January/158454.html
Wine still fails to build with GCC 10 development snapshots.

This is due to a change of defaults in GCC, from -fcommon to -fno-common,
cf. the following from http://gcc.gnu.org/gcc-10/porting_to.html :

�� A common mistake in C is omitting extern when declaring a global
�� variable in a header file. If the header is included by several files it
�� results in multiple definitions of the same variable. In previous GCC
�� versions this error is ignored. GCC 10 defaults to -fno-common, which
�� means a linker error will now be reported. To fix this, use extern in
�� header files when declaring global variables, and ensure each global is
�� defined in exactly one C file. As a workaround, legacy C code can be
�� compiled with -fcommon.


The failure left is

�� gmake[1]: Entering directory '/home/gerald/wine/dlls/schedsvc/tests'
�� ../../../tools/winegcc/winegcc -o schedsvc_test-stripped.exe.so
�� --wine-objdir ../../.. -fno-PIC -fasynchronous-unwind-tables \
�� -s -Wb,-F,schedsvc_test.exe -mno-cygwin atsvcapi.o rpcapi.o atsvc_c.o
�� schrpc_c.o testlist.o \�� -lrpcrt4 -lole32 -L/home/gerald/11-i386/lib
�� schrpc_c.o:(.bss+0x0): multiple definition of `rpc_handle'
�� atsvc_c.o:(.bss+0x0): first defined here
�� winebuild: /home/gerald/11-i386/bin/ld failed with status 1
�� winegcc: ../../../tools/winebuild/winebuild failed
�� gmake[1]: *** [Makefile:367: schedsvc_test-stripped.exe.so] Error 2
�� gmake[1]: Leaving directory '/home/gerald/wine/dlls/schedsvc/tests'
�� gmake: *** [Makefile:8961: dlls/schedsvc/tests] Error 2

atsvc_c.c and schrpc_c.c are auto-generated from atsvc.idl and
schrpc.idl, so I'm not sure how to tackle this.

Anyone who can help and take this?

Thank you,
Gerald