Date: Sat, 22 Apr 2017 19:43:01 -0400 From: Zack Weinberg <zackw@...ix.com> To: Rich Felker <dalias@...c.org> Cc: musl@...ts.openwall.com, GNU C Library <libc-alpha@...rceware.org> Subject: Re: [PATCH] add support for POSIX_SPAWN_SETSID On Sat, Apr 22, 2017 at 7:19 PM, Rich Felker <dalias@...c.org> wrote: >> > #define POSIX_SPAWN_SETSIGMASK 8 >> > #define POSIX_SPAWN_SETSCHEDPARAM 16 >> > #define POSIX_SPAWN_SETSCHEDULER 32 >> > +#define POSIX_SPAWN_SETSID 64 >> >> This overlaps with the glibc value for POSIX_SPAWN_USEVFORK; while we >> don't implement it, we also don't want to have mismatched constant >> ABI. ... > Thanks for all your work on this! Based on the glibc patch review, I'm > changing the error condition from !=0 to <0, and of course changing > the flag value to 128 to match. May I suggest that musl include a note in its headers, explaining that bit 64 is reserved to avoid an ABI conflict with glibc? Then the next time there's an addition, there will be less confusion. zw
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