unix bsp failure under redhat 6.0

[ian at zembu.com (Ian Lance Taylor)]

   Date: Thu, 30 Sep 1999 15:46:45 -0400
   From: Jay Kulpinski <jskulpin at eng01.gdds.com>

   *** c/src/exec/score/cpu/unix/cpu.c.orig        Wed Sep 29 16:27:30 1999
   --- c/src/exec/score/cpu/unix/cpu.c     Thu Sep 30 15:33:26 1999
   ***************
   *** 657,662 ****
   --- 657,665 ----
       int status;
       sigset_t  old_mask;

   + #if defined(__linux__)
   +   sigemptyset( &old_mask );
   + #endif
       status = sigprocmask(SIG_BLOCK, &_CPU_Signal_mask, &old_mask);
       if ( status )
	 _Internal_error_Occurred(

Calling sigemptyset will be correct on any POSIX system.  POSIX
requires you to call sigemptyset or sigfillset on any sigset_t before
passing it to any POSIX function.

Ian