diff -up Singular-3-1-5/kernel/mod2.h.cmake.in.orig Singular-3-1-5/kernel/mod2.h.cmake.in
--- Singular-3-1-5/kernel/mod2.h.cmake.in.orig	2012-07-12 08:24:57.000000000 -0600
+++ Singular-3-1-5/kernel/mod2.h.cmake.in	2014-03-04 12:30:00.000000000 -0700
@@ -157,6 +157,10 @@
 #cmakedefine SI_CPU_IA64 1
 /* CPU type: x86_64: */
 #cmakedefine SI_CPU_X86_64 1
+/* CPU type: arm: */
+#cmakedefine SI_CPU_ARM 1
+/* CPU type: s390 / s390x: */
+#cmakedefine SI_CPU_S390 1
 
 /*******************************************************************
  * Defines which are not set by configure
diff -up Singular-3-1-5/kernel/structs.h.orig Singular-3-1-5/kernel/structs.h
--- Singular-3-1-5/kernel/structs.h.orig	2012-07-12 08:24:57.000000000 -0600
+++ Singular-3-1-5/kernel/structs.h	2014-03-04 12:30:00.000000000 -0700
@@ -61,6 +61,20 @@ typedef void * ADDRESS;
   // #ifdef HAVE_MULT_MOD
   // #define HAVE_DIV_MOD
   // #endif
+#elif defined(SI_CPU_ARM)
+  // FIXME: need to run some tests
+  #define HAVE_MULT_MOD
+  // #define HAVE_GENERIC_ADD
+  #ifdef HAVE_MULT_MOD
+  #define HAVE_DIV_MOD
+  #endif
+#elif defined(SI_CPU_S390)
+  // FIXME: need to run some tests
+  // #define HAVE_MULT_MOD
+  #define HAVE_GENERIC_ADD
+  // #ifdef HAVE_MULT_MOD
+  // #define HAVE_DIV_MOD
+  // #endif
 #endif
 
 #if SIZEOF_LONG == 4
diff -up Singular-3-1-5/Singular/mod2.h.in.orig Singular-3-1-5/Singular/mod2.h.in
--- Singular-3-1-5/Singular/mod2.h.in.orig	2012-07-12 08:24:57.000000000 -0600
+++ Singular-3-1-5/Singular/mod2.h.in	2014-03-04 12:30:00.000000000 -0700
@@ -162,6 +162,10 @@
 #undef SI_CPU_IA64
 /* CPU type: x86_64: */
 #undef SI_CPU_X86_64
+/* CPU type: arm: */
+#undef SI_CPU_ARM
+/* CPU type: s390 / s390x: */
+#undef SI_CPU_S390
 /* whether development version of python is available */
 #undef HAVE_PYTHON
 /* whether static development version of python is available */
diff -up singuname.sh.orig singuname.sh
--- Singular-3-1-5/singuname.sh.orig	2012-07-12 08:24:57.000000000 -0600
+++ Singular-3-1-5/singuname.sh	2014-03-04 12:30:00.000000000 -0700
@@ -202,7 +202,7 @@ then
 elif (echo $uname_m | $egrep "Power Macintosh" > $devnull)
 then
     prefix="ppcMac"
-    if( uname -s | $egrep "Darwin" > $devnull)
+    if (uname -s | $egrep "Darwin" > $devnull)
     then
         echo ${prefix}-darwin
         exit 0
@@ -242,6 +242,30 @@ then
     if (echo $uname_a | $egrep "Linux" > $devnull)
     then
         echo ${prefix}-Linux
+        exit 0
+    else
+        echo ${prefix}-Unknown
+        exit 1
+    fi
+# arm-Linux ##########################################################
+elif (echo $uname_m | $egrep "arm" > $devnull)
+then
+    prefix=arm
+    if (echo $uname_a | $egrep "Linux" > $devnull)
+    then
+        echo ${prefix}-Linux
+        exit 0
+    else
+        echo ${prefix}-Unknown
+        exit 1
+    fi
+# s390(x)-Linux ######################################################
+elif (echo $uname_m | $egrep "s390" > $devnull)
+then
+    prefix=s390
+    if (echo $uname_a | $egrep "Linux" > $devnull)
+    then
+        echo ${prefix}-Linux
         exit 0
     else
         echo ${prefix}-Unknown
diff -dup Singular-3-1-5/Singular/configure.in.orig Singular-3-1-5/Singular/configure.in
--- Singular-3-1-5/Singular/configure.in.orig	2012-07-12 08:24:57.000000000 -0600
+++ Singular-3-1-5/Singular/configure.in	2014-03-04 12:30:00.000000000 -0700
@@ -436,6 +436,16 @@ if test "$ac_cv_singuname" = ppcMac-darw
   AC_SUBST(SI_CPU_PPC)
   AC_MSG_RESULT(SI_CPU_PPC)
 fi
+if test "$ac_cv_singuname" = arm-Linux; then
+  AC_DEFINE(SI_CPU_ARM)
+  AC_SUBST(SI_CPU_ARM)
+  AC_MSG_RESULT(SI_CPU_ARM)
+fi
+if test "$ac_cv_singuname" = s390-Linux; then
+  AC_DEFINE(SI_CPU_S390)
+  AC_SUBST(SI_CPU_S390)
+  AC_MSG_RESULT(SI_CPU_S390)
+fi
 # test again with CPU names
 if test "$ac_cv_singcpuname" = i386; then
   AC_DEFINE(SI_CPU_I386)
@@ -467,6 +477,16 @@ if test "$ac_cv_singcpuname" = ppc; then
   AC_SUBST(SI_CPU_PPC)
   AC_MSG_RESULT(SI_CPU_PPC)
 fi
+if test "$ac_cv_singcpuname" = arm; then
+  AC_DEFINE(SI_CPU_ARM)
+  AC_SUBST(SI_CPU_ARM)
+  AC_MSG_RESULT(SI_CPU_ARM)
+fi
+if test "$ac_cv_singcpuname" = s390; then
+  AC_DEFINE(SI_CPU_S390)
+  AC_SUBST(SI_CPU_S390)
+  AC_MSG_RESULT(SI_CPU_S390)
+fi
 
 SING_UNAME=`echo $SINGUNAME | tr '-' '_' `
 AC_SUBST(SING_UNAME)
diff -up Singular-3-1-5/Singular/configure.orig Singular-3-1-5/Singular/configure
--- Singular-3-1-5/Singular/configure.orig	2012-07-12 08:24:57.000000000 -0600
+++ Singular-3-1-5/Singular/configure	2014-03-04 12:30:00.000000000 -0700
@@ -665,6 +665,8 @@ SINGULAR_MAJOR_VERSION
 VERSION_DATE
 SINGULAR_VERSION
 SING_UNAME
+SI_CPU_ARM
+SI_CPU_S390
 SI_CPU_SPARC
 SI_CPU_PPC
 SI_CPU_IA64
@@ -2685,6 +2687,20 @@ if test "$ac_cv_singuname" = ppcMac-darw
   { $as_echo "$as_me:${as_lineno-$LINENO}: result: SI_CPU_PPC" >&5
 $as_echo "SI_CPU_PPC" >&6; }
 fi
+if test "$ac_cv_singuname" = arm-Linux; then
+  $as_echo "#define SI_CPU_ARM 1" >>confdefs.h
+
+
+  { $as_echo "$as_me:${as_lineno-$LINENO}: result: SI_CPU_ARM" >&5
+$as_echo "SI_CPU_ARM" >&6; }
+fi
+if test "$ac_cv_singuname" = s390-Linux; then
+  $as_echo "#define SI_CPU_S390 1" >>confdefs.h
+
+
+  { $as_echo "$as_me:${as_lineno-$LINENO}: result: SI_CPU_S390" >&5
+$as_echo "SI_CPU_S390" >&6; }
+fi
 # test again with CPU names
 if test "$ac_cv_singcpuname" = i386; then
   $as_echo "#define SI_CPU_I386 1" >>confdefs.h
@@ -2728,6 +2744,20 @@ if test "$ac_cv_singcpuname" = ppc; then
   { $as_echo "$as_me:${as_lineno-$LINENO}: result: SI_CPU_PPC" >&5
 $as_echo "SI_CPU_PPC" >&6; }
 fi
+if test "$ac_cv_singcpuname" = arm; then
+  $as_echo "#define SI_CPU_ARM 1" >>confdefs.h
+
+
+  { $as_echo "$as_me:${as_lineno-$LINENO}: result: SI_CPU_ARM" >&5
+$as_echo "SI_CPU_ARM" >&6; }
+fi
+if test "$ac_cv_singcpuname" = s390; then
+  $as_echo "#define SI_CPU_S390 1" >>confdefs.h
+
+
+  { $as_echo "$as_me:${as_lineno-$LINENO}: result: SI_CPU_S390" >&5
+$as_echo "SI_CPU_S390" >&6; }
+fi
 
 SING_UNAME=`echo $SINGUNAME | tr '-' '_' `