Package: manpages-dev Version: 3.22-1 Severity: normal When _XOPEN_SOURCE is defined the glibc headers no longer define MAP_ANON or MAP_ANONYMOUS (because _BSD_SOURCE is no longer defined by default).
So if I want to use both pread(2) and mmap(2) in same C source file, I have to define both _XOPEN_SOURCE and _BSD_SOURCE to get the prototype for pread *and* MAP_ANON for mmap(2). The manpage of pread(2) does say that _XOPEN_SOURCE 500 is needed, but doesn't say that this breaks mmap. mmap's manpage doesn't say that some constants may not be available under _XOPEN_SOURCE. Why is _XOPEN_SOURCE 500 even needed for pread? It is a POSIX function, and defining _XOPEN_SOURCE is not needed for other POSIX functions. Also the POSIX manpage for pread(3p) doesn't say that _XOPEN_SOURCE is needed, so this seems like an unnecessary complication on Linux. If pread(2) was available w/o _XOPEN_SOURCE being defined, then the problem with using pread and mmap would no longer exist. I think this is rather a question for glibc though. -- System Information: Debian Release: squeeze/sid APT prefers unstable APT policy: (990, 'unstable'), (500, 'stable'), (1, 'experimental') Architecture: amd64 (x86_64) Kernel: Linux 2.6.30.4 (SMP w/4 CPU cores; PREEMPT) Locale: LANG=en_US.UTF-8, LC_CTYPE=en_US.UTF-8 (charmap=UTF-8) Shell: /bin/sh linked to /bin/bash Versions of packages manpages-dev depends on: ii manpages 3.22-1 Manual pages about using a GNU/Lin manpages-dev recommends no packages. Versions of packages manpages-dev suggests: ii konqueror [man-browser] 4:4.3.0-1 KDE 4's advanced file manager, web ii man-db [man-browser] 2.5.5-3 on-line manual pager -- no debconf information -- To UNSUBSCRIBE, email to debian-bugs-dist-requ...@lists.debian.org with a subject of "unsubscribe". Trouble? Contact listmas...@lists.debian.org
