diff --git a/configure.in b/configure.in
--- a/configure.in
+++ b/configure.in
@@ -1322,24 +1322,36 @@ fi
 
 # Only set CPU_ARCH if we recognize the value of OS_TEST
 
 case "$OS_TEST" in
 *86 | i86pc)
     CPU_ARCH=x86
     ;;
 
+powerpc64 | ppc64)
+    CPU_ARCH=ppc64
+    ;;
+
 powerpc* | ppc | rs6000)
     CPU_ARCH=ppc
     ;;
 
 Alpha | alpha | ALPHA)
     CPU_ARCH=Alpha
     ;;
 
+s390)
+    CPU_ARCH=s390
+    ;;
+
+s390x)
+    CPU_ARCH=s390x
+    ;;
+
 hppa* | parisc)
     CPU_ARCH=hppa
     ;;
 
 sun4u | sparc*)
     CPU_ARCH=sparc
     ;;