The posix_memalign declaration is incompatible with musl for C++,
because of the exception specification.  It also pollutes the
namespace and lacks protection against a potential macro definition
that is allowed by POSIX.  The fix avoids source level namespace
pollution but retains the dependency on the posix_memalign extern
libc symbol.

The fix is ugly, but it is not possible to correctly redeclare a
libc function in a public gcc header for C++.


gcc/Changelog:

2015-04-16  Szabolcs Nagy  <szabolcs.nagy@arm.com>

	* config/i386/pmm_malloc.h (posix_memalign): Renamed to ...
	(__gcc_posix_memalign): This.  Use posix_memalign as extern
	symbol only.