[commit: ghc] master: Signals: Always install SIGUSR2 handler (d990b5f)

[git at git.haskell.org]

Repository : ssh://git@git.haskell.org/ghc

On branch  : master
Link       : http://ghc.haskell.org/trac/ghc/changeset/d990b5f6ae0cc22f83032e6dee40790ca9c8567a/ghc

>---------------------------------------------------------------

commit d990b5f6ae0cc22f83032e6dee40790ca9c8567a
Author: Ben Gamari <ben at smart-cactus.org>
Date:   Sun Oct 18 00:07:15 2015 +0200

    Signals: Always install SIGUSR2 handler
    
    Even if libdw isn't available.


>---------------------------------------------------------------

d990b5f6ae0cc22f83032e6dee40790ca9c8567a
 rts/posix/Signals.c | 2 --
 1 file changed, 2 deletions(-)

diff --git a/rts/posix/Signals.c b/rts/posix/Signals.c
index 88d1856..89195e2 100644
--- a/rts/posix/Signals.c
+++ b/rts/posix/Signals.c
@@ -690,7 +690,6 @@ initDefaultHandlers(void)
         sysErrorBelch("warning: failed to install SIGPIPE handler");
     }
 
-#ifdef USE_LIBDW
     // Print a backtrace on SIGUSR2
     action.sa_handler = backtrace_handler;
     sigemptyset(&action.sa_mask);
@@ -698,7 +697,6 @@ initDefaultHandlers(void)
     if (sigaction(SIGUSR2, &action, &oact) != 0) {
         sysErrorBelch("warning: failed to install SIGUSR2 handler");
     }
-#endif
 
     set_sigtstp_action(rtsTrue);
 }