gdb

gdb
	* README: Mention parallel check.
gdb/testsuite
	* dg-extract-results.sh: New file.
	* Makefile.in (FORCE_PARALLEL): New variable.
	(CHECK_TARGET): New conditional variable.
	(check): Use CHECK_TARGET.
	(DO_RUNTEST): New variable.
	(check-single): New target.
	(TEST_DIRS): New variable.
	(TEST_TARGETS): Likewise.
	(check-parallel): New target.
	(check-gdb.%): New pattern.
	(BASE1_FILES): New variable.
	(BASE2_FILES): Likewise.
	(check-gdb.base%): New pattern.
	(%/.dir): New pattern.
	* configure: Rebuild.
	* aclocal.m4 (AM_CONDITIONAL): New defun.
	* configure.ac: Check whether user is using GNU make.
	(GMAKE): New conditional.