engine_policy_setaffinity only if it's supported

configure.ac

@@ -260,8 +260,10 @@ fi
 AM_CONDITIONAL([HAVEPARALLELHDF5],[test "$have_parallel_hdf5" = "yes"])
 
 # Check for setaffinity.
-AC_CHECK_FUNC( pthread_setaffinity_np , AC_DEFINE([HAVE_SETAFFINITY],[true],
+AC_CHECK_FUNC(pthread_setaffinity_np, AC_DEFINE([HAVE_SETAFFINITY],[true],
     [Defined if pthread_setaffinity_np exists.]) )
+AM_CONDITIONAL(HAVESETAFFINITY,
+    [test "$ac_cv_func_pthread_setaffinity_np" = "yes"])
 
 # Check for timing functions needed by cycle.h.
 AC_HEADER_TIME

examples/Makefile.am

@@ -36,19 +36,26 @@ if HAVEMPI
 bin_PROGRAMS += swift_mpi swift_fixdt_mpi swift_mindt_mpi
 endif
 
+# engine_policy_setaffinity is available?
+if HAVESETAFFINITY
+ENGINE_POLICY_SETAFFINITY=| engine_policy_setaffinity
+else
+ENGINE_POLICY_SETAFFINITY=
+endif
+
 # Sources for swift
 swift_SOURCES = main.c
-swift_CFLAGS = $(MYFLAGS) $(AM_CFLAGS) -DENGINE_POLICY="engine_policy_multistep | engine_policy_keep | engine_policy_setaffinity"
+swift_CFLAGS = $(MYFLAGS) $(AM_CFLAGS) -DENGINE_POLICY="engine_policy_multistep | engine_policy_keep $(ENGINE_POLICY_SETAFFINITY)"
 swift_LDADD =  ../src/.libs/libswiftsim.a $(HDF5_LDFLAGS) $(HDF5_LIBS)
 
 # Sources for swift_fixdt
 swift_fixdt_SOURCES = main.c
-swift_fixdt_CFLAGS = $(MYFLAGS) $(AM_CFLAGS) -DENGINE_POLICY="engine_policy_fixdt | engine_policy_keep | engine_policy_setaffinity"
+swift_fixdt_CFLAGS = $(MYFLAGS) $(AM_CFLAGS) -DENGINE_POLICY="engine_policy_fixdt | engine_policy_keep $(ENGINE_POLICY_SETAFFINITY)"
 swift_fixdt_LDADD =  ../src/.libs/libswiftsim.a $(HDF5_LDFLAGS) $(HDF5_LIBS)
 
 # Sources for swift_mindt
 swift_mindt_SOURCES = main.c
-swift_mindt_CFLAGS = $(MYFLAGS) $(AM_CFLAGS) -DENGINE_POLICY="engine_policy_keep | engine_policy_setaffinity"
+swift_mindt_CFLAGS = $(MYFLAGS) $(AM_CFLAGS) -DENGINE_POLICY="engine_policy_keep $(ENGINE_POLICY_SETAFFINITY)"
 swift_mindt_LDADD =  ../src/.libs/libswiftsim.a $(HDF5_LDFLAGS) $(HDF5_LIBS)
 
 # Sources for swift_mpi