X-Recipient: archive-cygwin@delorie.com X-SWARE-Spam-Status: No, hits=-6.9 required=5.0 tests=AWL,BAYES_00,RCVD_IN_DNSWL_HI,SPF_HELO_PASS,T_RP_MATCHES_RCVD X-Spam-Check-By: sourceware.org Message-ID: <4F42C4D0.8050108@redhat.com> Date: Mon, 20 Feb 2012 15:10:24 -0700 From: Eric Blake User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:10.0.1) Gecko/20120209 Thunderbird/10.0.1 MIME-Version: 1.0 To: cygwin@cygwin.com Subject: Re: Issues with stdio.h References: <20120220002507.GA16123@ednor.casa.cgf.cx> <4F42BDAE.50006@towo.net> In-Reply-To: <4F42BDAE.50006@towo.net> OpenPGP: url=http://people.redhat.com/eblake/eblake.gpg Content-Type: multipart/signed; micalg=pgp-sha256; protocol="application/pgp-signature"; boundary="------------enig00D64D110D57153EB82505FB" X-IsSubscribed: yes Mailing-List: contact cygwin-help@cygwin.com; run by ezmlm List-Id: List-Subscribe: List-Archive: List-Post: List-Help: , Sender: cygwin-owner@cygwin.com Mail-Followup-To: cygwin@cygwin.com Delivered-To: mailing list cygwin@cygwin.com --------------enig00D64D110D57153EB82505FB Content-Type: text/plain; charset=ISO-8859-1 Content-Transfer-Encoding: quoted-printable On 02/20/2012 02:39 PM, Thomas Wolff wrote: > Am 20.02.2012 01:25, schrieb Christopher Faylor: >> On Sun, Feb 19, 2012 at 07:07:04PM -0500, Chris Sutcliffe wrote: >>> ... >>> /usr/include/stdio.h:34:20: fatal error: stddef.h: No such file or >>> directory >> stddef.h comes from the gcc4-core package. It's located in: >> >> usr/lib/gcc/i686-pc-cygwin/4.5.3/include/stddef.h >> >> and should be found automatically by the compiler. > I think it's a weird setup that an include file referred from > /usr/include is not found in that location but well hidden in > installation-specific directories. Not the usual setup anyway. Wrong. GNU/Linux does this too. On my Fedora machine, $ printf '#include \n#include \n' | gcc -E -\ |grep '^# 1 "/' # 1 "/usr/lib/gcc/x86_64-redhat-linux/4.6.2/include/stddef.h" 1 3 4 # 1 "/usr/include/stdio.h" 1 3 4 # 1 "/usr/include/features.h" 1 3 4 # 1 "/usr/include/sys/cdefs.h" 1 3 4 # 1 "/usr/include/bits/wordsize.h" 1 3 4 # 1 "/usr/include/gnu/stubs.h" 1 3 4 # 1 "/usr/include/bits/wordsize.h" 1 3 4 # 1 "/usr/include/gnu/stubs-64.h" 1 3 4 # 1 "/usr/lib/gcc/x86_64-redhat-linux/4.6.2/include/stddef.h" 1 3 4 # 1 "/usr/include/bits/types.h" 1 3 4 # 1 "/usr/include/bits/wordsize.h" 1 3 4 # 1 "/usr/include/bits/typesizes.h" 1 3 4 # 1 "/usr/include/libio.h" 1 3 4 # 1 "/usr/include/_G_config.h" 1 3 4 # 1 "/usr/lib/gcc/x86_64-redhat-linux/4.6.2/include/stddef.h" 1 3 4 # 1 "/usr/include/wchar.h" 1 3 4 # 1 "/usr/lib/gcc/x86_64-redhat-linux/4.6.2/include/stdarg.h" 1 3 4 # 1 "/usr/include/bits/stdio_lim.h" 1 3 4 # 1 "/usr/include/bits/sys_errlist.h" 1 3 4 =09 So it is quite a common practice, and cygwin is merely copying what you get on a GNU/Linux box. > Also > uncomfortable for people who want to check include files manually. How so? As far back as C89, and reiterated in newer documents such as POSIX 2008, there is no guarantee that is an actual file that lives in any particular directory, only that the <> notation in the #include directive tells the compiler to find whatever it needs to provide that standard header. > Please consider to change this (gcc maintainer?). I don't see the need for any change. --=20 Eric Blake eblake@redhat.com +1-919-301-3266 Libvirt virtualization library http://libvirt.org --------------enig00D64D110D57153EB82505FB Content-Type: application/pgp-signature; name="signature.asc" Content-Description: OpenPGP digital signature Content-Disposition: attachment; filename="signature.asc" -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.4.12 (GNU/Linux) Comment: Public key at http://people.redhat.com/eblake/eblake.gpg Comment: Using GnuPG with Mozilla - http://enigmail.mozdev.org/ iQEcBAEBCAAGBQJPQsTQAAoJEKeha0olJ0NqHvQIAKJp1ZB331JtlgEy0V6wtNnL eKYPiRC/ad/kZqJ6JVYMEr3bloXMEtAcYz6mC9G9jhD25DbwwlY+aA24lidoOfG1 U55mjtGCTuTN20I+zfflSnYv1i8wgRG6pAm3rR6XoFnRH99nHSHqrbDGSB98sqem AICSnKa/FH0kJtmMyTZItvU7fpkFV9jwODNThKC1jL3pIsUYK3ToScBR3uRdB5Nz Agch8Osxy33SHpljQG1G9dUqpcXSywUEEqhagjSM2i16SMlgwNe0O6FQqqhcFXdb 0DqZkEji3/YA6ba0fpqKAqeIMnLOlQTEql1KILvEPTtTH9gb8jjGWXKNwZWN1nQ= =+imi -----END PGP SIGNATURE----- --------------enig00D64D110D57153EB82505FB--