2011-08-04 Emmanuel Briot <briot@adacore.com>

2011-08-04  Emmanuel Briot  <briot@adacore.com>

	* makeutl.adb (Complete_Mains): when a multi-unit source file is
	specified on the gprbuild command line, we need to compile all units
	within that file, not just the first one we find
	Fix error message for mains that are not found.

2011-08-04  Thomas Quinot  <quinot@adacore.com>

	* sem_ch6.adb: Update comment.
	* sem_ch12.adb: Minor reformatting.

2011-08-04  Bob Duff  <duff@adacore.com>

	* s-tasren.adb (Task_Do_Or_Queue): Previous code was reading
	Acceptor.Terminate_Alternative without locking Acceptor, which causes a
	race condition whose symptom is to fail to lock Parent. That, in turn,
	causes Parent.Awake_Count to be accessed without locking Parent, which
	causes another race condition whose symptom is that Parent.Awake_Count
	can be off by 1 (either too high or too low). The solution is to lock
	Parent unconditionally, and then lock Acceptor, before reading
	Acceptor.Terminate_Alternative.

git-svn-id: svn+ssh://gcc.gnu.org/svn/gcc/trunk@177352 138bc75d-0d04-0410-961f-82ee72b054a4