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X-HELO: | mx1.redhat.com |
Subject: | Re: [ANNOUNCEMENT] TEST RELEASE: Cygwin 2.4.0-0.11 |
To: | cygwin AT cygwin DOT com |
References: | <20151216164848 DOT GM3507 AT calimero DOT vinschen DOT de> <5671EFF8 DOT 6030804 AT cornell DOT edu> <20151217093634 DOT GP3507 AT calimero DOT vinschen DOT de> <56730350 DOT 1080002 AT cornell DOT edu> <20151217201709 DOT GA28305 AT calimero DOT vinschen DOT de> <56731D8C DOT 9020001 AT cornell DOT edu> <20151217210107 DOT GC3507 AT calimero DOT vinschen DOT de> <56732621 DOT 6040101 AT redhat DOT com> |
From: | Eric Blake <eblake AT redhat DOT com> |
Openpgp: | url=http://people.redhat.com/eblake/eblake.gpg |
Message-ID: | <56732BEB.7020507@redhat.com> |
Date: | Thu, 17 Dec 2015 14:40:59 -0700 |
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--f5VxblCHDRTwkPl4WACMGHmIWabWF3pnJ Content-Type: text/plain; charset=utf-8 Content-Transfer-Encoding: quoted-printable On 12/17/2015 02:16 PM, Eric Blake wrote: > On 12/17/2015 02:01 PM, Corinna Vinschen wrote: >=20 >>> Here's what happens: >>> >>> One of the Gnulib modules includes sys/types.h, which includes sys/sele= ct.h >>> because of the recent changes. This brings in Gnulib's sys/select.h, w= hich >>> includes signal.h. We then get the errors I posted because we haven't = yet >>> finished including sys/types.h. >=20 > Gnulib has been taught to work around early inclusion problems before; > sounds like this will be another case where gnulib has to make sure the > system header is complete before its own replacements kick in. >=20 >>> >>> All the build errors disappear if I remove '#include <sys/select.h>' fr= om >>> sys/types.h. You said above that the macros related to select don't re= ally >>> belong in sys/types.h. So why does the latter include sys/select.h? Another data point: POSIX does NOT allow <sys/types.h> to pollute the namespace with symbols from <sys/select.h>. True, the use of __BSD_VISIBLE says that POSIX is not in play, but I'm suspecting that very few programs are written that use sys/select.h functionality but were relying on the BSD headers to indirectly include it via sys/types.h, since such programs would fail to compile on other systems where the indirect include is not present (more likely, any clients of sys/select.h are directly including it). So at this point, I'm leaning towards fixing the cygwin header to not include sys/select.h from sys/types.h. --=20 Eric Blake eblake redhat com +1-919-301-3266 Libvirt virtualization library http://libvirt.org --f5VxblCHDRTwkPl4WACMGHmIWabWF3pnJ Content-Type: application/pgp-signature; name="signature.asc" Content-Description: OpenPGP digital signature Content-Disposition: attachment; filename="signature.asc" -----BEGIN PGP SIGNATURE----- Version: GnuPG v2 Comment: Public key at http://people.redhat.com/eblake/eblake.gpg Comment: Using GnuPG with Thunderbird - http://www.enigmail.net/ iQEcBAEBCAAGBQJWcyvrAAoJEKeha0olJ0Nq1xoH/2zwPkFUDcY7Yd2H/O7V1sy4 8TZSAEYJzwi3MT3FhL6J+MlH94pjKHnxnlvLytfsBecBJ8zTYX3vh1EmLQJbTYMf rco8/k8TBCXqU7rZyazNSxACom3vw3yQ4nO+Q2s3Vm8jaQklmBiIfQCR/3jQg/S1 VWzsR51Uv3uk/mhAQusjxeaUhNhKL/hP99lRMym9mBzDdZnoIPGm9ds+lCPa+Ww8 tW8uPVF94MDBMiMEB0OWnG0w2eQOW4ibN3hxU0UyMg1f2mGL9cWfsfkduJW3rHTZ nqTu8VaTtGWog05mGmxZyrly6PNPo70FMOkOhEFCA1weBDkg7UNmEazFPkLd1wQ= =KjS6 -----END PGP SIGNATURE----- --f5VxblCHDRTwkPl4WACMGHmIWabWF3pnJ--
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