!391 新增支持使用从linux内核源码中构建出的UAPI

Merge pull request !391 from Caoruihong/make_uapi_from_linux

BUILD.gn

@@ -192,11 +192,42 @@ action("create_syscall_h") {
   deps = [ ":create_porting_src" ]
 }
 
+action("make_uapi") {
+  kernel_dir = rebase_path(linux_kernel_dir)
+  kernel_out_dir = rebase_path(get_path_info("${kernel_dir}/", "out_dir"))
+  uapi_dir = "${kernel_out_dir}/usr/include"
+  make_uapi_cmd = "rm -rf ${uapi_dir}"
+  make_uapi_cmd += " && make -C ${kernel_dir} -sj headers O=${kernel_out_dir} ARCH=${target_cpu}"
+  make_uapi_cmd += " && cp -f ${kernel_dir}/drivers/staging/android/uapi/ashmem.h ${uapi_dir}/linux/ashmem.h"
+  make_uapi_cmd += " && sed -i '/#define _INPUT_H/i#define _UAPI_INPUT_H' ${uapi_dir}/linux/input.h"
+  make_uapi_cmd += " && sed -i '/struct __kernel_sockaddr_storage/i#define sockaddr_storage __kernel_sockaddr_storage' ${uapi_dir}/linux/socket.h"
+  outputs = [ "${target_out_dir}/" + rebase_path(uapi_dir, target_out_dir) ]
+  script = "/bin/sh"
+  args = [ "-c" ]
+  args += [ make_uapi_cmd ]
+}
+
+# if uapi_dir does not exist, then make uapi from linux_kernel_dir
+if (exec_script("/bin/sh",
+                [
+                  "-c",
+                  "if [ ! -d " + rebase_path(uapi_dir) +
+                      " ]; then echo true; else echo false; fi",
+                ],
+                "value")) {
+  uapi_dir = get_path_info("${linux_kernel_dir}/", "out_dir") + "/usr/include"
+  uapi_deps = [ ":make_uapi" ]
+} else {
+  uapi_deps = []
+}
+
 action("copy_uapi") {
-  outputs = [ "${target_out_dir}/${musl_inc_out_dir}/linux" ]
+  outputs = [ "${target_out_dir}/${musl_inc_out_dir}" ]
+  inputs = [ uapi_dir ]
+  deps = uapi_deps
   script = "scripts/copy_uapi.sh"
-  args = [ "-i" ] + [ rebase_path("${uapi_dir}") ]
-  args += [ "-o" ] + [ rebase_path("${target_out_dir}/${musl_inc_out_dir}") ]
+  args = [ "-i" ] + rebase_path(inputs)
+  args += [ "-o" ] + rebase_path(outputs)
   args += [ "-t" ] + [ "${musl_arch}" ]
 }
 

musl_config.gni

@@ -33,6 +33,7 @@ declare_args() {
   musl_ported_dir = "intermidiates/${musl_target_os}/musl_src_ported"
   musl_inc_out_dir = "usr/include/${musl_target_triple}"
   uapi_dir = "//kernel/linux/patches/linux-5.10/prebuilts/usr/include"
+  linux_kernel_dir = "//kernel/linux/linux-5.10"
   musl_dir = "//third_party/musl"
   musl_porting_dir = "//third_party/musl/porting/linux/user"