使用gcc编译器模板

build/BUILDCONFIG.gn

@@ -2,6 +2,34 @@
 # Use of this source code is governed by a BSD-style license that can be
 # found in the LICENSE file.
 
+
+
+
+# board_toolchain 用于定义使用的编译工具链
+# 这个值可以取 gcc riscv-gcc
+
+
+if (!defined(board_toolchain)){
+  board_toolchain="gcc"
+}
+
+if (board_toolchain=="riscv-gcc"){
+  current_cc_command = "riscv64-unknown-elf-gcc"
+  current_cxx_command = "riscv64-unknown-elf-g++"
+  current_ar_command = "riscv64-unknown-elf-ar"
+  current_ld_command = current_cc_command
+  current_strip_command =
+      "riscv64-unknown-elf-strip --strip-unneeded"
+} else if (board_toolchain=="gcc"){
+  current_cc_command = "gcc"
+  current_cxx_command = "g++"
+  current_ar_command = "ar"
+  current_ld_command = current_cc_command
+  current_strip_command =
+      "strip --strip-unneeded"
+}
+
+
 if (target_os == "") {
   target_os = host_os
 }
@@ -38,4 +66,4 @@ set_defaults("source_set") {
   configs = _shared_binary_target_configs
 }
 
-set_default_toolchain("//build/toolchain:gcc")
+set_default_toolchain("//build/toolchain:${board_toolchain}")

build/toolchain/BUILD.gn

@@ -2,87 +2,14 @@
 # Use of this source code is governed by a BSD-style license that can be
 # found in the LICENSE file.
 
-toolchain("gcc") {
-  tool("cc") {
-    depfile = "{{output}}.d"
-    command = "gcc -MMD -MF $depfile {{defines}} {{include_dirs}} {{cflags}} {{cflags_c}} -c {{source}} -o {{output}}"
-    depsformat = "gcc"
-    description = "CC {{output}}"
-    outputs =
-        [ "{{source_out_dir}}/{{target_output_name}}.{{source_name_part}}.o" ]
-  }
-
-  tool("cxx") {
-    depfile = "{{output}}.d"
-    command = "g++ -MMD -MF $depfile {{defines}} {{include_dirs}} {{cflags}} {{cflags_cc}} -c {{source}} -o {{output}}"
-    depsformat = "gcc"
-    description = "CXX {{output}}"
-    outputs =
-        [ "{{source_out_dir}}/{{target_output_name}}.{{source_name_part}}.o" ]
-  }
-
-  tool("alink") {
-    command = "rm -f {{output}} && ar rcs {{output}} {{inputs}}"
-    description = "AR {{target_output_name}}{{output_extension}}"
-
-    outputs =
-        [ "{{target_out_dir}}/{{target_output_name}}{{output_extension}}" ]
-    default_output_extension = ".a"
-    output_prefix = "lib"
-  }
-
-  tool("solink") {
-    soname = "{{target_output_name}}{{output_extension}}"  # e.g. "libfoo.so".
-    sofile = "{{output_dir}}/$soname"
-    rspfile = soname + ".rsp"
-    if (is_mac) {
-      os_specific_option = "-install_name @executable_path/$sofile"
-      rspfile_content = "{{inputs}} {{solibs}} {{libs}}"
-    } else {
-      os_specific_option = "-Wl,-soname=$soname"
-      rspfile_content = "-Wl,--whole-archive {{inputs}} {{solibs}} -Wl,--no-whole-archive {{libs}}"
-    }
-
-    command = "g++ -shared {{ldflags}} -o $sofile $os_specific_option @$rspfile"
-
-    description = "SOLINK $soname"
-
-    # Use this for {{output_extension}} expansions unless a target manually
-    # overrides it (in which case {{output_extension}} will be what the target
-    # specifies).
-    default_output_extension = ".so"
-
-    # Use this for {{output_dir}} expansions unless a target manually overrides
-    # it (in which case {{output_dir}} will be what the target specifies).
-    default_output_dir = "{{root_out_dir}}"
-
-    outputs = [ sofile ]
-    link_output = sofile
-    depend_output = sofile
-    output_prefix = "lib"
-  }
-
-  tool("link") {
-    outfile = "{{target_output_name}}{{output_extension}}"
-    rspfile = "$outfile.rsp"
-    if (is_mac) {
-      command = "g++ {{ldflags}} -o $outfile @$rspfile {{solibs}} {{libs}}"
-    } else {
-      command = "g++ {{ldflags}} -o $outfile -Wl,--start-group @$rspfile {{solibs}} -Wl,--end-group {{libs}}"
-    }
-    description = "LINK $outfile"
-    default_output_dir = "{{root_out_dir}}"
-    rspfile_content = "{{inputs}}"
-    outputs = [ outfile ]
-  }
-
-  tool("stamp") {
-    command = "touch {{output}}"
-    description = "STAMP {{output}}"
-  }
-
-  tool("copy") {
-    command = "cp -af {{source}} {{output}}"
-    description = "COPY {{source}} {{output}}"
-  }
+
+import("//build/toolchain/gcc.gni")
+
+# 使用模板定义编译工具链
+gcc_toolchain(board_toolchain){
+  cc = current_cc_command
+  cxx = current_cxx_command
+  ar = current_ar_command
+  ld = current_ld_command
+  strip = current_strip_command
 }

build/toolchain/gcc.gni

@@ -0,0 +1,137 @@
+# Copyright (c) 2020 Huawei Device Co., Ltd.
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#     http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+
+# invoker是调用者 应用调用者的变量
+template("gcc_toolchain") {
+  toolchain(target_name) {
+    assert(defined(invoker.ar), "gcc toolchain must specify a \"ar\" value")
+    assert(defined(invoker.cc), "gcc toolchain must specify a \"cc\" value")
+    assert(defined(invoker.cxx), "gcc toolchain must specify a \"cxx\" value")
+    assert(defined(invoker.ld), "gcc toolchain must specify a \"ld\" value")
+
+    cc = invoker.cc
+    cxx = invoker.cxx
+    ar = invoker.ar
+    ld = invoker.ld
+
+    need_strip = false
+    if (defined(invoker.strip)) {
+      strip = invoker.strip
+      need_strip = true
+    }
+
+    if (defined(invoker.extra_ldflags) && invoker.extra_ldflags != "") {
+      extra_ldflags = " " + invoker.extra_ldflags
+    } else {
+      extra_ldflags = ""
+    }
+
+    tool("cc") {
+      command = "$cc {{defines}} {{include_dirs}} {{cflags}} {{cflags_c}} -c {{source}} -o {{output}}"
+      depsformat = "gcc"
+      description = "gcc cross compiler {{output}}"
+      outputs =
+          [ "{{source_out_dir}}/{{target_output_name}}.{{source_name_part}}.o" ]
+    }
+    tool("cxx") {
+      depfile = "{{output}}.d"
+      command = "$cxx {{defines}} {{include_dirs}} {{cflags_cc}} -c {{source}} -o {{output}}"
+      depsformat = "gcc"
+      description = "gcc CXX {{output}}"
+      outputs =
+          [ "{{source_out_dir}}/{{target_output_name}}.{{source_name_part}}.o" ]
+    }
+    tool("asm") {
+      depfile = "{{output}}.d"
+      command = "$cc {{defines}} {{include_dirs}} {{asmflags}} {{source}} -c -o {{output}}"
+      depsformat = "gcc"
+      description = "gcc cross compiler {{output}}"
+      outputs =
+          [ "{{source_out_dir}}/{{target_output_name}}.{{source_name_part}}.o" ]
+    }
+    tool("alink") {
+      outfile = "{{output_dir}}/{{target_output_name}}{{output_extension}}"
+      rspfile = "{{output}}.rsp"
+      rspfile_content = "{{inputs}}"
+      command = "$ar cr {{output}} @\"$rspfile\""
+
+      description = "AR {{output}}"
+      outputs = [ outfile ]
+
+      default_output_dir = "{{root_out_dir}}/libs"
+      default_output_extension = ".a"
+      output_prefix = "lib"
+    }
+    tool("solink") {
+      outfile = "{{output_dir}}/{{target_output_name}}{{output_extension}}"
+      unstripped_outfile = outfile
+
+      rspfile = "$outfile.rsp"
+      rspfile_content = "{{inputs}}"
+      command = ""
+      if (need_strip) {
+        unstripped_outfile = "{{output_dir}}/unstripped/usr/lib/{{target_output_name}}{{output_extension}}"
+      }
+      command += "$ld -shared {{ldflags}} $extra_ldflags " + "-Wl,--start-group {{inputs}} {{libs}} -Wl,--end-group -o $unstripped_outfile"
+      if (need_strip) {
+        command += " && $strip \"$unstripped_outfile\" -o \"$outfile\""
+      }
+      description = "SOLINK $outfile"
+      outputs = [ outfile ]
+      if (unstripped_outfile != outfile) {
+        outputs += [ unstripped_outfile ]
+      }
+      default_output_dir = "{{root_out_dir}}"
+      default_output_extension = ".so"
+      output_prefix = "lib"
+    }
+    tool("link") {
+      outfile = "{{output_dir}}/bin/{{target_output_name}}{{output_extension}}"
+      unstripped_outfile = outfile
+
+      rspfile = "$outfile.rsp"
+      command = ""
+      if (need_strip) {
+        unstripped_outfile = "{{output_dir}}/unstripped/bin/{{target_output_name}}{{output_extension}}"
+      }
+      command += "$ld {{ldflags}} $extra_ldflags " + "-Wl,--start-group {{inputs}} {{libs}} -Wl,--end-group -o $unstripped_outfile "
+      if (need_strip) {
+        command += " && $strip \"$unstripped_outfile\" -o \"$outfile\""
+      }
+
+      description = "LINK $outfile"
+      default_output_dir = "{{root_out_dir}}"
+      rspfile_content = "{{inputs}}"
+      outputs = [ outfile ]
+      if (unstripped_outfile != outfile) {
+        outputs += [ unstripped_outfile ]
+      }
+    }
+    tool("stamp") {
+      if (host_os == "win") {
+        command = "cmd /c type nul > \"{{output}}\""
+      } else {
+        command = "/usr/bin/touch {{output}}"
+      }
+      description = "STAMP {{output}}"
+    }
+    tool("copy") {
+      if (host_os == "win") {
+        command = "python $ohos_root_path/build/lite/copy_files.py --src_type=file --src={{source}} --dest_dir={{output}}"
+      } else if (host_os == "linux") {
+        command = "cp -afd {{source}} {{output}}"
+      }
+      description = "COPY {{source}} {{output}}"
+    }
+  }
+}