From 7ec5ec3f93ba2d47f0db7c6505887fe147c96e89 Mon Sep 17 00:00:00 2001
From: Catalin Toda <catalinii@yahoo.com>
Date: Fri, 27 Mar 2020 20:16:27 -0700
Subject: [PATCH] Add linaro gcc for compiling on host on aarch64

---
 config/path                                   | 26 ++++++++------
 .../lang/gcc-arm-aarch64-none-elf/package.mk  | 36 +++++++++++++++++++
 packages/security/openssl/package.mk          |  2 +-
 scripts/checkdeps                             | 11 ++++++
 4 files changed, 64 insertions(+), 11 deletions(-)
 create mode 100644 packages/lang/gcc-arm-aarch64-none-elf/package.mk

diff --git a/config/path b/config/path
index 7d40b97d73..7d96080236 100644
--- a/config/path
+++ b/config/path
@@ -42,16 +42,6 @@ SYSROOT_PREFIX=$TOOLCHAIN/$TARGET_NAME/sysroot
 LIB_PREFIX=$SYSROOT_PREFIX/usr
 TARGET_PREFIX=$TOOLCHAIN/bin/$TARGET_NAME-
 
-# use ARM toolchain on 64/32 split builds
-if [ -z "$KERNEL_TOOLCHAIN" -a "$TARGET_KERNEL_ARCH" = "arm64" -a "$TARGET_ARCH" = "arm" ]; then
-  KERNEL_TOOLCHAIN="aarch64-none-linux-gnu"
-fi
-if [ -n "$KERNEL_TOOLCHAIN" ]; then
-  TARGET_KERNEL_PREFIX=$TOOLCHAIN/lib/gcc-arm-$KERNEL_TOOLCHAIN/bin/$KERNEL_TOOLCHAIN-
-else
-  TARGET_KERNEL_PREFIX=$TARGET_PREFIX
-fi
-
 FAKEROOT_SCRIPT=$BUILD/.fakeroot
 
 if [ -z "$INSTALL" ]; then
@@ -71,6 +61,22 @@ XORG_PATH_DRIVERS=/usr/lib/xorg/modules/drivers
 
 . config/optimize
 
+# use ARM toolchain on 64/32 split builds
+if [ -z "$KERNEL_TOOLCHAIN" -a "$TARGET_KERNEL_ARCH" = "arm64" -a "$TARGET_ARCH" = "arm" ]; then
+  if [ "${MACHINE_HARDWARE_NAME}" = "x86_64" ]; then
+  KERNEL_TOOLCHAIN="aarch64-none-linux-gnu"
+  elif [ "${MACHINE_HARDWARE_NAME}" = "aarch64" ]; then
+    KERNEL_TOOLCHAIN="aarch64-none-elf"
+  else
+    die "No known toolchain available for ${MACHINE_HARDWARE_NAME}."
+  fi
+fi
+if [ -n "$KERNEL_TOOLCHAIN" ]; then
+  TARGET_KERNEL_PREFIX=$TOOLCHAIN/lib/gcc-arm-$KERNEL_TOOLCHAIN/bin/$KERNEL_TOOLCHAIN-
+else
+  TARGET_KERNEL_PREFIX=$TARGET_PREFIX
+fi
+
 if [ -z "$CCACHE_DIR" ]; then
   export CCACHE_DIR=$BUILD/.ccache
 fi
diff --git a/packages/lang/gcc-arm-aarch64-none-elf/package.mk b/packages/lang/gcc-arm-aarch64-none-elf/package.mk
new file mode 100644
index 0000000000..b3d396906e
--- /dev/null
+++ b/packages/lang/gcc-arm-aarch64-none-elf/package.mk
@@ -0,0 +1,36 @@
+# SPDX-License-Identifier: GPL-2.0
+# Copyright (C) 2017-present Team LibreELEC (https://libreelec.tv)
+
+PKG_NAME="gcc-arm-aarch64-none-elf"
+PKG_VERSION="9.2-2019.12"
+PKG_SHA256="041ca53bdd434b1a48f32161e957da1b84543c373d1881e2fd84a1579f87f243"
+PKG_LICENSE="GPL"
+PKG_SITE="https://developer.arm.com/tools-and-software/open-source-software/developer-tools/gnu-toolchain/gnu-a"
+PKG_URL="https://developer.arm.com/-/media/Files/downloads/gnu-a/${PKG_VERSION}/binrel/gcc-arm-${PKG_VERSION}-aarch64-aarch64-none-elf.tar.xz"
+PKG_DEPENDS_HOST="ccache:host"
+PKG_LONGDESC="ARM Aarch64 GNU Linux Binary Toolchain"
+PKG_TOOLCHAIN="manual"
+
+makeinstall_host() {
+  mkdir -p $TOOLCHAIN/lib/gcc-arm-aarch64-none-elf/
+    cp -a * $TOOLCHAIN/lib/gcc-arm-aarch64-none-elf
+
+  # wrap gcc and g++ with ccache like in gcc package.mk
+  PKG_GCC_PREFIX="$TOOLCHAIN/lib/gcc-arm-aarch64-none-elf/bin/aarch64-none-elf-"
+
+  cp "${PKG_GCC_PREFIX}gcc" "${PKG_GCC_PREFIX}gcc.real"
+cat > "${PKG_GCC_PREFIX}gcc" << EOF
+#!/bin/sh
+$TOOLCHAIN/bin/ccache ${PKG_GCC_PREFIX}gcc.real "\$@"
+EOF
+
+  chmod +x "${PKG_GCC_PREFIX}gcc"
+
+  cp "${PKG_GCC_PREFIX}g++" "${PKG_GCC_PREFIX}g++.real"
+cat > "${PKG_GCC_PREFIX}g++" << EOF
+#!/bin/sh
+$TOOLCHAIN/bin/ccache ${PKG_GCC_PREFIX}g++.real "\$@"
+EOF
+
+  chmod +x "${PKG_GCC_PREFIX}g++"
+}
diff --git a/packages/security/openssl/package.mk b/packages/security/openssl/package.mk
index 0efb40dd10..e59a553e31 100644
--- a/packages/security/openssl/package.mk
+++ b/packages/security/openssl/package.mk
@@ -46,7 +46,7 @@ pre_configure_host() {
 
 configure_host() {
   cd $PKG_BUILD/.$HOST_NAME
-  ./Configure $PKG_CONFIGURE_OPTS_HOST $PKG_CONFIGURE_OPTS_SHARED linux-x86_64 $CFLAGS $LDFLAGS
+  ./Configure $PKG_CONFIGURE_OPTS_HOST $PKG_CONFIGURE_OPTS_SHARED linux-${MACHINE_HARDWARE_NAME} $CFLAGS $LDFLAGS
 }
 
 makeinstall_host() {
diff --git a/scripts/checkdeps b/scripts/checkdeps
index 371b67b36c..9940b46dcc 100755
--- a/scripts/checkdeps
+++ b/scripts/checkdeps
@@ -122,6 +122,17 @@ if [ -n "${DISTRO_DEPS_PKG}" ] ; then
   deps_pkg+=(${DISTRO_DEPS_PKG})
 fi
 
+# aarch64 dependencies
+if [ "$(uname -m)" = "aarch64" ]; then
+  if [ ! -f /lib64/ld-linux-x86-64.so.2 -a ! -f /lib/x86_64-linux-gnu/libc.so.6 ]; then
+    printf "Copy from a working x86_64 system:\n\t/lib64/libc.so.6\n\t/lib/x86_64-linux-gnu/libc.so.6\n"
+  fi
+  files+=(/lib64/ld-linux-x86-64.so.2 /lib/x86_64-linux-gnu/libc.so.6)
+  files_pkg+=(libc6:amd64 libc6:amd64)
+  deps+=(qemu-x86_64)
+  deps_pkg+=(qemu-user-binfmt)
+fi
+
 get_deps
 
 if [ "${#need[@]}" -gt 0 ]; then