* configure.in (HAVE_RO_EH_FRAME): Check whether .eh_frame section
	should be read-only.
	* configure: Rebuilt.
	* fficonfig.h.in: Rebuilt.
	* include/ffi.h.in (EH_FRAME_FLAGS): Define.
	* src/alpha/osf.S: Use EH_FRAME_FLAGS.
	* src/powerpc/linux64.S: Likewise.
	* src/powerpc/linux64_closure.S: Likewise.  Include ffi.h.
	* src/powerpc/sysv.S: Use EH_FRAME_FLAGS.  Use pcrel encoding
	if -fpic/-fPIC/-mrelocatable.
	* src/powerpc/powerpc_closure.S: Likewise.
	* src/sparc/v8.S: If HAVE_RO_EH_FRAME is defined, don't include
	#write in .eh_frame flags.
	* src/sparc/v9.S: Likewise.
	* src/x86/unix64.S: Use EH_FRAME_FLAGS.
	* src/x86/sysv.S: Likewise.  Use pcrel encoding if -fpic/-fPIC.
	* src/s390/sysv.S: Use EH_FRAME_FLAGS.  Include ffi.h.

From-SVN: r66887