--- a/common/autoconf/boot-jdk.m4	Wed Jul 05 19:01:32 2017 +0200
+++ b/common/autoconf/boot-jdk.m4	Tue Jul 02 17:38:10 2013 -0700
@@ -316,7 +316,7 @@
 
     # Minimum amount of heap memory.
     ADD_JVM_ARG_IF_OK([-Xms64M],boot_jdk_jvmargs,[$JAVA])
-    if test "x$OPENJDK_TARGET_OS" = "xmacosx"; then
+    if test "x$OPENJDK_TARGET_OS" = "xmacosx" || test "x$OPENJDK_TARGET_CPU" = "xppc64" ; then
         # Why does macosx need more heap? Its the huge JDK batch.
         ADD_JVM_ARG_IF_OK([-Xmx1600M],boot_jdk_jvmargs,[$JAVA])
     else