+# Check for XmPIXMAP_AND_STRING.
+#
+# Just checking for the existence of this identifier is sufficient, to ensure
+# that the C compiler accepts the name. If it turns out to not actually be
+# supported by the library used at runtime, Motif itself will catch this
+# and set to the default (i.e., XmSTRING).
+AM_COND_IF([HAVE_MOTIF],
+[AC_CACHE_CHECK([whether Motif supports XmPIXMAP_AND_STRING],
+[dx_cv_motif_have_pixmap_and_string],
+[save_CFLAGS=$CFLAGS save_LIBS=$LIBS
+CFLAGS="$MOTIF_CFLAGS $CFLAGS" LIBS="$MOTIF_LIBS $LIBS"
+AC_COMPUTE_INT([dx_tmp],
+ [XmPIXMAP != XmPIXMAP_AND_STRING && XmSTRING != XmPIXMAP_AND_STRING],
+ [#include <Xm/Label.h>], [dx_tmp=0])
+AS_IF([test x"$dx_tmp" = x"1"],
+ [dx_cv_motif_have_pixmap_and_string=yes],
+ [dx_cv_motif_have_pixmap_and_string=no])
+CFLAGS=$save_CFLAGS LIBS=$save_LIBS])
+AS_IF([test x"$dx_cv_motif_have_pixmap_and_string" = x"yes"],
+ [AC_DEFINE([HAVE_MOTIF_PIXMAP_AND_STRING], [1],
+ [Define to 1 if Motif supports XmPIXMAP_AND_STRING])])
+])
+