Without the change build fails agains -fno-common toolchains as:
ld: /build/cct3qrT9.o:(.bss+0x0): multiple definition of `handle'; /build/cc4dJNO8.o:(.bss+0x0): first defined here
ld: /build/cct3qrT9.o:(.bss+0x8): multiple definition of `cdprs'; /build/cc4dJNO8.o:(.bss+0x8): first defined here
ld: /build/cct3qrT9.o:(.bss+0xc): multiple definition of `timeout'; /build/cc4dJNO8.o:(.bss+0xc): first defined here
ld: /build/ccbaP0xb.o:(.bss+0x0): multiple definition of `handle'; /build/cc4dJNO8.o:(.bss+0x0): first defined here
ld: /build/ccbaP0xb.o:(.bss+0x8): multiple definition of `cdprs'; /build/cc4dJNO8.o:(.bss+0x8): first defined here
ld: /build/ccbaP0xb.o:(.bss+0xc): multiple definition of `timeout'; /build/cc4dJNO8.o:(.bss+0xc): first defined here
Sergei Trofimovich