Convert pthread_attr_init() to slurm_attr_init(). This sets the default

stack size to an appropriate size. System dies on AIX without this due
to too small of a stack.

src/plugins/sched/backfill/backfill_wrapper.c

@@ -32,6 +32,7 @@
 
 #include "src/common/plugin.h"
 #include "src/common/log.h"
+#include "src/common/macros.h"
 #include "backfill.h"
 
 const char		plugin_name[]	= "SLURM Backfill Scheduler plugin";
@@ -61,7 +62,7 @@ int init( void )
 		return SLURM_ERROR;
 	}
 
-	pthread_attr_init( &attr );
+	slurm_attr_init( &attr );
 	pthread_attr_setdetachstate( &attr, PTHREAD_CREATE_DETACHED );
 	pthread_create( &backfill_thread, NULL, backfill_agent, NULL);
 	thread_running = true;

src/plugins/sched/maui/agent.cpp

@@ -26,6 +26,7 @@
 
 extern "C" {
 # include "src/common/log.h"
+# include "src/common/macros.h"
 }
 
 #include "agent.h"
@@ -69,7 +70,7 @@ agent_t::start( void )
 {
 	pthread_attr_t attr;
 
-	pthread_attr_init( &attr );
+	slurm_attr_init( &attr );
 	pthread_attr_setdetachstate( &attr, PTHREAD_CREATE_DETACHED );
 	return pthread_create( &m_thread,
 			       &attr,

src/plugins/switch/elan/switch_elan.c

@@ -42,6 +42,7 @@
 
 #include <slurm/slurm_errno.h>
 
+#include "src/common/macros.h"
 #include "src/common/slurm_xlator.h"
 
 #include "src/plugins/switch/elan/qsw.h"
@@ -400,9 +401,7 @@ int switch_p_node_init ( void )
 	if (_set_elan_ids() < 0)
 		return SLURM_ERROR;
 
-	if (pthread_attr_init(&attr))
-		error("pthread_attr_init: %m");
-
+	slurm_attr_init(&attr);
 	if (pthread_attr_setdetachstate(&attr, PTHREAD_CREATE_DETACHED))
 		error("pthread_attr_setdetachstate: %m");