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Define MSG_DONTWAIT as MSG_NONBLOCK if needed and possible - #2477

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Define MSG_DONTWAIT as MSG_NONBLOCK if needed and possible#2477
reshmavk wants to merge 5 commits into
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reshmavk:missing_msg_dontwait

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@reshmavk reshmavk commented Aug 19, 2026

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fd.cc:138:56: error: 'MSG_DONTWAIT' was not declared in this scope;
did you mean 'MSG_DONTROUTE'?

AIX does not define MSG_DONTWAIT. The functional equivalent of this
flag on AIX is MSG_NONBLOCK.

This change fixes the above mentioned compilation error on AIX.

@squid-anubis squid-anubis added the M-failed-description https://github.com/measurement-factory/anubis#pull-request-labels label Aug 19, 2026
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@squid-anubis squid-anubis removed the M-failed-description https://github.com/measurement-factory/anubis#pull-request-labels label Aug 19, 2026
@rousskov rousskov changed the title Define MSG_DONTWAIT as MSG_NONBLOCK for AIX Define MSG_DONTWAIT as MSG_NONBLOCK if needed and possible Aug 19, 2026

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Thank you for this fix! I made it a bit more general and updated its location to where current master/v8 code places these kind of hacks. I did not test my changes. Please check!

I adjusted PR description, primarily to avoid retelling what the diff already clearly says. Please adjust further as needed.

I have two followup questions, but this PR is on the right track.

Comment thread compat/socket.h
Comment thread compat/socket.h
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@rousskov rousskov added the S-waiting-for-author author action is expected (and usually required) label Aug 19, 2026

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It is usually best to introduce Squid-specific constants than to define/fix "standard" ones, but Squid already violates that rule of thumb for MSG_NOSIGNAL, so I think we can go with the proposed solution, especially since it fixes AIX build.

Comment thread compat/socket.h
@rousskov rousskov added M-cleared-for-merge https://github.com/measurement-factory/anubis#pull-request-labels S-could-use-an-approval An approval may speed this PR merger (but is not required) and removed S-waiting-for-author author action is expected (and usually required) labels Aug 20, 2026
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