re PR c++/50454 (Unexpected problems with -pedantic / -pedantic-errors and __int128 and unsigned __int128 specializations)

/cp
2011-09-21  Paolo Carlini  <paolo.carlini@oracle.com>

	PR c++/50454
	* decl.c (grokdeclarator): Consistently handle both __int128
	and unsigned __int128 with -pedantic; suppress diagnostic in
	system headers.

/testsuite
2011-09-21  Paolo Carlini  <paolo.carlini@oracle.com>

	PR c++/50454
	* g++.dg/ext/int128-1.C: New.
	* g++.dg/ext/int128-2.C: Likewise.
	* g++.dg/ext/int128-2.h: Likewise.

From-SVN: r179042