Add EV3-specific patches for OpenJDK

Author: JakubVanek

build/ev3.patch

@@ -0,0 +1,31 @@
+diff -r a08cbfc0e4ec common/autoconf/flags.m4
+--- a/common/autoconf/flags.m4	Thu Aug 03 18:56:56 2017 +0000
++++ b/common/autoconf/flags.m4	Wed Dec 27 00:52:44 2017 +0100
+@@ -30,7 +30,7 @@
+ AC_DEFUN([FLAGS_SETUP_ABI_PROFILE],
+ [
+   AC_ARG_WITH(abi-profile, [AS_HELP_STRING([--with-abi-profile],
+-      [specify ABI profile for ARM builds (arm-vfp-sflt,arm-vfp-hflt,arm-sflt, armv5-vfp-sflt,armv6-vfp-hflt,arm64,aarch64) @<:@toolchain dependent@:>@ ])])
++      [specify ABI profile for ARM builds (arm-vfp-sflt,arm-vfp-hflt,arm-sflt,arm-ev3,armv5-vfp-sflt,armv6-vfp-hflt,arm64,aarch64) @<:@toolchain dependent@:>@ ])])
+ 
+   if test "x$with_abi_profile" != x; then
+     if test "x$OPENJDK_TARGET_CPU" != xarm && \
+@@ -51,6 +51,9 @@
+     elif test "x$OPENJDK_TARGET_ABI_PROFILE" = xarm-sflt; then
+       ARM_FLOAT_TYPE=sflt
+       ARM_ARCH_TYPE_FLAGS='-march=armv5t -marm'
++    elif test "x$OPENJDK_TARGET_ABI_PROFILE" = xarm-ev3; then
++      ARM_FLOAT_TYPE=sflt
++      ARM_ARCH_TYPE_FLAGS='-mcpu=arm926ej-s -marm'
+     elif test "x$OPENJDK_TARGET_ABI_PROFILE" = xarmv5-vfp-sflt; then
+       ARM_FLOAT_TYPE=vfp-sflt
+       ARM_ARCH_TYPE_FLAGS='-march=armv5t -marm'
+@@ -1305,6 +1308,8 @@
+   if test "x$OPENJDK_$1_OS" = xlinux; then
+     if test "x$OPENJDK_$1_CPU" = xx86; then
+       $2JVM_ASFLAGS="[$]$2JVM_ASFLAGS -march=i586"
++    elif test "x$OPENJDK_TARGET_ABI_PROFILE" = xarm-ev3; then
++      $2JVM_ASFLAGS="-mcpu=arm926ej-s"
+     fi
+   elif test "x$OPENJDK_$1_OS" = xmacosx; then
+     $2JVM_ASFLAGS="[$]$2JVM_ASFLAGS -x assembler-with-cpp -mno-omit-leaf-frame-pointer -mstack-alignment=16"

build/float.patch

@@ -0,0 +1,24 @@
+diff -r b756e7a2ec33 src/cpu/arm/vm/assembler_arm_32.hpp
+--- a/src/cpu/arm/vm/assembler_arm_32.hpp	Thu Aug 03 18:56:57 2017 +0000
++++ b/src/cpu/arm/vm/assembler_arm_32.hpp	Wed Dec 27 01:08:37 2017 +0100
+@@ -1234,10 +1234,17 @@
+ 
+ // Imported code from glibc soft-fp bundle for
+ // calculation accuracy improvement. See CR 6757269.
+-extern double __aeabi_fadd_glibc(float, float);
+-extern double __aeabi_fsub_glibc(float, float);
+-extern double __aeabi_dadd_glibc(double, double);
+-extern double __aeabi_dsub_glibc(double, double);
++
++//extern double __aeabi_fadd_glibc(float, float);
++//extern double __aeabi_fsub_glibc(float, float);
++//extern double __aeabi_dadd_glibc(double, double);
++//extern double __aeabi_dsub_glibc(double, double);
++
++// We don't need very accurate floating point math.
++#define __aeabi_fadd_glibc __aeabi_fadd
++#define __aeabi_fsub_glibc __aeabi_fsub
++#define __aeabi_dadd_glibc __aeabi_dadd
++#define __aeabi_dsub_glibc __aeabi_dsub
+ };
+ #endif // __SOFTFP__