PR target/37812
	* gcc.target/powerpc/altivec_check.h (altivec_cell_check): Abort
	if __PPU__ isn't defined.
	* lib/target-supports.exp (check_effective_target_powerpc_ppu_ok):
	New.
	* gcc.target/powerpc/altivec-cell-8.c: Use powerpc_ppu_ok.

From-SVN: r141564