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gcc-10 changed the default from -fcommon to fno-common: https://gcc.gnu.org/PR85678 As a result build fails as: ld: src/log.o:(.bss+0x0): multiple definition of `W'; src/barwin.o:(.bss+0x0): first defined here ld: src/wmfs.o:(.bss+0x0): multiple definition of `W'; src/barwin.o:(.bss+0x0): first defined here ld: src/wmfs.o:(.bss+0x10): multiple definition of `event_handle'; src/client.o:(.bss+0x10): first defined here The change moves definitions into .c files.
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gcc-10 changed the default from -fcommon to fno-common:
https://gcc.gnu.org/PR85678
As a result build fails as:
The change moves definitions into .c files.