[PATCH, libbacktrace]: Fix compilation on CentOS 5.8

[Andreas Schwab]

Ian Lance Taylor <iant@google.com> writes:

> mmapio.c uses _GNU_SOURCE so that getpagesize is available on GNU/Linux systems.

That should be available by default (which includes BSD things) unless
the namespace has been restricted in some other way.

There's of course also the POSIX way of using sysconf(_SC_PAGESIZE).

Andreas.

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Andreas Schwab, schwab@linux-m68k.org
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