Add toolchain setup with README and kernel-path argument

- setup.sh: ./setup.sh <kernel-repo-path>, unpacks to <kernel-parent>/toolchain/
- README.md: install + build instructions
- clang-11.0.1 (AOSP 6443078) + binutils-2.27

README.md

@@ -0,0 +1,72 @@
+# EEBBK S6 Kernel Toolchain
+
+Build toolchain for the EEBBK S6 (SM7150 / sdmmagpie) Android kernel.
+
+Contains:
+- **clang-11.0.1** (AOSP prebuilt 6443078) — matches stock firmware compiler
+- **binutils-2.27** (GNU) — matches stock firmware assembler/linker
+
+The kernel source is in a separate repository:
+`android_kernel_eebbk_sm6150` (CAF LA.UM.9.1.c25, kernel 4.14.190).
+
+## Install
+
+```bash
+git clone <this-repo>   # e.g. android_kernel_toolchain
+cd android_kernel_toolchain
+./setup.sh <kernel-repo-path>
+```
+
+Example:
+
+```bash
+git clone http://<host>:3003/huang1057/android_kernel_toolchain.git
+git clone http://<host>:3003/huang1057/android_kernel_eebbk_sm6150.git
+
+cd android_kernel_toolchain
+./setup.sh ../android_kernel_eebbk_sm6150
+```
+
+This unpacks `clang` and `binutils` into `<kernel-repo-parent>/toolchain/`:
+
+```
+<parent>/
+├── android_kernel_eebbk_sm6150/   <- kernel source
+└── toolchain/
+    ├── android_prebuilts_clang_host_linux-x86_clang-6443078-10.0/
+    └── binutils-2.27-install/
+```
+
+## Build the kernel
+
+```bash
+cd android_kernel_eebbk_sm6150
+
+export TC=../toolchain
+export ARCH=arm64
+export CROSS_COMPILE=$TC/binutils-2.27-install/bin/aarch64-linux-gnu-
+export CLANG=$TC/android_prebuilts_clang_host_linux-x86_clang-6443078-10.0
+export PATH=$CLANG/bin:$PATH
+export LOCALVERSION=-perf
+
+make vendor/sdmsteppe-perf_defconfig
+
+make -j$(nproc) \
+  CC="python3 ./scripts/gcc-wrapper.py $CLANG/bin/aarch64-linux-gnu-clang" \
+  HOSTCC=gcc HOSTCXX=g++
+
+gzip -n -9 -c arch/arm64/boot/Image > Image.gz
+```
+
+## Output
+
+- `arch/arm64/boot/Image` — uncompressed kernel
+- `Image.gz` — compressed kernel (for boot.img packing)
+
+## Notes
+
+- `LOCALVERSION=-perf` keeps the vermagic at `4.14.190-perf` (no trailing `+`),
+  required so stock vendor kernel modules load.
+- Do NOT use `LLVM_IAS=1`. GNU binutils 2.27 `as` is required
+  (`-no-integrated-as` is handled by the toolchain).
+- Requires Python 3 (for `gcc-wrapper.py`), gcc (host), on Linux x86_64.

setup.sh

@@ -1,33 +1,47 @@
 #!/bin/bash
-# setup.sh - 解压工具链到母项目 (android_kernel_eebbk_sm6150) 旁边
+# setup.sh - 解压构建工具链到内核仓库
 #
 # 用法:
-#   git clone <toolchain-repo>  # 克隆工具链仓库
-#   cd <toolchain-repo>         # 进入
-#   ./setup.sh                  # 运行, 会把工具链放到母项目同级目录
+#   ./setup.sh <内核仓库路径>
 #
-# 最终目录结构:
+# 例:
+#   git clone <toolchain-repo>
+#   cd <toolchain-repo>
+#   ./setup.sh ~/android_kernel_eebbk_sm6150
+#
+# 效果: 工具链解压到 <内核仓库路径>/../toolchain/ (与内核仓库同级)
 #   <parent>/
-#   ├── android_kernel_eebbk_sm6150/   <- 内核源码
+#   ├── android_kernel_eebbk_sm6150/   <- 内核仓库
 #   └── toolchain/
 #       ├── android_prebuilts_clang_host_linux-x86_clang-6443078-10.0/
 #       └── binutils-2.27-install/
 
 set -e
 
-SCRIPT_DIR="$(cd "$(dirname "${BASH_SOURCE[0]}")" && pwd)"
-# 工具链仓库目录的上一级 = 母项目目录
-PARENT_DIR="$(dirname "$SCRIPT_DIR")"
-TOOLCHAIN_DIR="$PARENT_DIR/toolchain"
+if [ $# -lt 1 ]; then
+    echo "用法: ./setup.sh <内核仓库路径>"
+    echo "例:   ./setup.sh ~/android_kernel_eebbk_sm6150"
+    exit 1
+fi
 
+KERNEL_DIR="$(cd "$1" && pwd)"
+SCRIPT_DIR="$(cd "$(dirname "${BASH_SOURCE[0]}")" && pwd)"
+TOOLCHAIN_DIR="$(dirname "$KERNEL_DIR")/toolchain"
+
+if [ ! -d "$KERNEL_DIR/Makefile" ] && [ ! -f "$KERNEL_DIR/Makefile" ]; then
+    echo "错误: $KERNEL_DIR 看起来不是内核源码目录 (没有 Makefile)"
+    exit 1
+fi
+
+echo "=== 内核仓库: $KERNEL_DIR ==="
 echo "=== 工具链安装到: $TOOLCHAIN_DIR ==="
 mkdir -p "$TOOLCHAIN_DIR"
 
-echo "=== 解压 binutils-2.27 ==="
+echo "=== 解压 binutils-2.27 (39MB) ==="
 tar -xzf "$SCRIPT_DIR/binutils-2.27-install.tar.gz" -C "$TOOLCHAIN_DIR"
 echo "完成"
 
-echo "=== 解压 clang-11.0.1 (较大, 请稍候) ==="
+echo "=== 解压 clang-11.0.1 (342MB, 请稍候) ==="
 tar -xzf "$SCRIPT_DIR/clang-6443078.tar.gz" -C "$TOOLCHAIN_DIR"
 echo "完成"
 
@@ -36,8 +50,14 @@ echo "=== 工具链就绪 ==="
 ls -d "$TOOLCHAIN_DIR"/android_prebuilts_clang_host_linux-x86_clang-6443078-10.0
 ls -d "$TOOLCHAIN_DIR"/binutils-2.27-install
 echo ""
-echo "编译内核时设置:"
+echo "编译内核:"
+echo "  cd $KERNEL_DIR"
 echo "  export TC=$TOOLCHAIN_DIR"
+echo "  export ARCH=arm64"
 echo "  export CROSS_COMPILE=\$TC/binutils-2.27-install/bin/aarch64-linux-gnu-"
 echo "  export CLANG=\$TC/android_prebuilts_clang_host_linux-x86_clang-6443078-10.0"
 echo "  export PATH=\$CLANG/bin:\$PATH"
+echo "  export LOCALVERSION=-perf"
+echo "  make vendor/sdmsteppe-perf_defconfig"
+echo "  make -j\$(nproc) CC=\"python3 ./scripts/gcc-wrapper.py \$CLANG/bin/aarch64-linux-gnu-clang\" HOSTCC=gcc HOSTCXX=g++"
+echo "  gzip -n -9 -c arch/arm64/boot/Image > Image.gz"