--- a/make/autoconf/flags-cflags.m4 Tue Nov 26 13:55:11 2019 +0100
+++ b/make/autoconf/flags-cflags.m4 Wed Nov 27 10:07:29 2019 +0100
@@ -532,6 +532,11 @@
if test "x$TOOLCHAIN_TYPE" = xgcc; then
TOOLCHAIN_CFLAGS_JVM="$TOOLCHAIN_CFLAGS_JVM -fcheck-new -fstack-protector"
TOOLCHAIN_CFLAGS_JDK="-pipe -fstack-protector"
+ # reduce lib size on s390x in link step, this needs also special compile flags
+ if test "x$OPENJDK_TARGET_CPU" = xs390x; then
+ TOOLCHAIN_CFLAGS_JVM="$TOOLCHAIN_CFLAGS_JVM -ffunction-sections -fdata-sections"
+ TOOLCHAIN_CFLAGS_JDK="$TOOLCHAIN_CFLAGS_JDK -ffunction-sections -fdata-sections"
+ fi
# technically NOT for CXX (but since this gives *worse* performance, use
# no-strict-aliasing everywhere!)
TOOLCHAIN_CFLAGS_JDK_CONLY="-fno-strict-aliasing"