b985615522
Motivation: Google requires stricter compilation by adding -Werror and enabling many other warnings. Modification: * fix warning caused by -Wmissing-braces * Use the address of `sendmmsg` rather than the function itself when checking for presence. This resovles the warning caused by `-Wpointer-bool-conversion`. More detail: When compiling on Linux, `sendmmsg` is always present, so the function is always nonnull. When compiling elsewhere, the function is defined as `__attribute__((weak))` which means it may be absent at link time. This is controlled by `IO_NETTY_SENDMMSG_NOT_FOUND`, which is off by default. The reason for the error is due to the risk of accidentally not calling the function. By adding `&` before the function, there is no ambiguity. (the result of the fn call cannot have its address taken.) * use != to check for sendmmsg Result: Easier compilation. |
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