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This eliminates the need to specify the return type when using
handle_eintr. We let the compiler deduce it for us.
Also, use lowercase for function parameter names. Uppercase should
only be used on template parameters.
gdb/ChangeLog:
* nat/linux-waitpid.c: Include "gdbsupport/eintr.h".
(my_waitpid): Use gdb::handle_eintr.
gdbserver/ChangeLog:
* netbsd-low.cc (netbsd_waitpid, netbsd_process_target::kill)
(netbsd_qxfer_libraries_svr4): Use gdb::handle_eintr without
explicit type.
gdbsupport/ChangeLog:
* eintr.h (handle_eintr): Replace Ret template parameter with
ErrorValType. Use it as type of the failure value. Deduce the
function's return type using decltype. Use lowercase for function
parameter names.
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