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Re: Handling fatal signals in GNU make

From: Paul Eggert
Subject: Re: Handling fatal signals in GNU make
Date: Sun, 9 Jun 2019 15:47:21 -0700
User-agent: Mozilla/5.0 (X11; Linux x86_64; rv:60.0) Gecko/20100101 Thunderbird/60.7.0

On 6/9/19 3:11 PM, Paul Smith wrote:
This is what sigsuspend is for.
Unfortunately sigsuspend() is not an option since it's not available on
Windows (as far as I can tell).

On platforms lacking sigsuspend, perhaps you could use the self-pipe trick. That is, your SIGCHILD handler simply writes a byte into a pipe, and you use select+read+waitpid to turn the SIGCHLD signal into a selectable event. See, for example:

Doesn't GNU Make already do something like this already with the jobserver pipe? If so, this may be a better solution even on more-standard platforms. If not, sigsuspend might still be a better choice on the more-standard platforms that have it, as it should be less hacky.

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