always align words if heterogeneous support is enabled

config/opal_configure_options.m4

@@ -325,6 +325,29 @@ AC_DEFINE_UNQUOTED([OPAL_ENABLE_HETEROGENEOUS_SUPPORT],
                    [Enable features required for heterogeneous support])
 
 
+if test "$opal_want_heterogeneous" = 1; then
+    ompi_cv_c_word_size_align=yes
+else
+    AC_CACHE_CHECK([if word-sized integers must be word-size aligned],
+        [ompi_cv_c_word_size_align],
+        [AC_LANG_PUSH(C)
+         AC_RUN_IFELSE([AC_LANG_PROGRAM([dnl
+#include <stdlib.h>], [[    long data[2] = {0, 0};
+    long *lp;
+    int *ip;
+    ip = (int*) data;
+    ip++;
+    lp = (long*) ip;
+    return lp[0]; ]])],
+            [ompi_cv_c_word_size_align=no],
+            [ompi_cv_c_word_size_align=yes],
+            [ompi_cv_c_word_size_align=yes])])
+fi
+AS_IF([test $ompi_cv_c_word_size_align = yes], [results=1], [results=0])
+AC_DEFINE_UNQUOTED([OPAL_ALIGN_WORD_SIZE_INTEGERS], [$results],
+    [set to 1 if word-size integers must be aligned to word-size padding to prevent bus errors])
+
+
 #
 # Cross-compile data
 #

configure.ac

@@ -935,24 +935,6 @@ AC_C_BIGENDIAN
 
 OPAL_CHECK_BROKEN_QSORT
 
-AC_CACHE_CHECK([if word-sized integers must be word-size aligned],
-    [ompi_cv_c_word_size_align],
-    [AC_LANG_PUSH(C)
-     AC_RUN_IFELSE([AC_LANG_PROGRAM([dnl
-#include <stdlib.h>], [[    long data[2] = {0, 0};
-    long *lp;
-    int *ip;
-    ip = (int*) data;
-    ip++;
-    lp = (long*) ip;
-    return lp[0]; ]])],
-        [ompi_cv_c_word_size_align=no],
-        [ompi_cv_c_word_size_align=yes],
-        [ompi_cv_c_word_size_align=yes])])
-AS_IF([test $ompi_cv_c_word_size_align = yes], [results=1], [results=0])
-AC_DEFINE_UNQUOTED([OPAL_ALIGN_WORD_SIZE_INTEGERS], [$results],
-    [set to 1 if word-size integers must be aligned to word-size padding to prevent bus errors])
-
 # all: SYSV semaphores
 # all: SYSV shared memory
 # all: size of FD_SET