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Users sometimes redefines _sbrk, _read and _write but would like to use other functions in rdimon. This patch defines them weak symbols to avoid multiple definition linker errors. Joey Ye <joey.ye@arm.com> ChangeLog.newlib: libc/sys/arm/syscalls.c (_sbrk): Define as weak symbols. (_read, _write): Ditto. ChangeLog.libgloss: arm/syscalls.c (_sbrk): Define as weak symbols. (_read, _write): Ditto.
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