2019-08-08  Martin Liska  <mliska@suse.cz>

	PR bootstrap/91352
	* gcc.c (driver::detect_jobserver): Use is_valid_fd.
	* lto-wrapper.c (jobserver_active_p): Likewise.
2019-08-08  Martin Liska  <mliska@suse.cz>

	PR bootstrap/91352
	* libiberty.h (is_valid_fd): New function.
2019-08-08  Martin Liska  <mliska@suse.cz>

	PR bootstrap/91352
	* lrealpath.c (is_valid_fd): New function.

From-SVN: r274208