add no-op POSIX_SPAWN_USEVFORK to spawn.h
authorRich Felker <dalias@aerifal.cx>
Sun, 23 Apr 2017 00:40:09 +0000 (20:40 -0400)
committerRich Felker <dalias@aerifal.cx>
Sun, 23 Apr 2017 00:40:09 +0000 (20:40 -0400)
commit77e895dcfadb156c9f378d26c9d0497ce2baf13f
treebe7f0e6d2e0e78ac7039b0e1f18402466743928e
parent555504166852a9b9c56ac4e1fb5bb1bf20cbf8ad
add no-op POSIX_SPAWN_USEVFORK to spawn.h

the bit is reserved anyway for ABI-compat reasons; this documents it
and makes it so we can have posix_spawnattr_setflags check for flag
validity without hard-coding an anonymous bit value.
include/spawn.h