Add loongson3a Build jobs.

Change-Id: I4a0259f82272099e08df0e7dea91489f6d641ca4
Reviewed-on: https://skia-review.googlesource.com/113670
Commit-Queue: Ben Wagner <benjaminwagner@google.com>
Reviewed-by: Mike Klein <mtklein@chromium.org>

3 files changed, 100 insertions, 4 deletions

diff --git a/infra/bots/recipe_modules/flavor/examples/full.expected/Build-Debian9-GCC-loongson3a-Release.json b/infra/bots/recipe_modules/flavor/examples/full.expected/Build-Debian9-GCC-loongson3a-Release.json
new file mode 100644
index 0000000000..92099f6c9b
--- /dev/null
+++ b/infra/bots/recipe_modules/flavor/examples/full.expected/Build-Debian9-GCC-loongson3a-Release.json
@@ -0,0 +1,72 @@
+[
+  {
+    "cmd": [
+      "python",
+      "-u",
+      "RECIPE_MODULE[recipe_engine::file]/resources/fileutil.py",
+      "--json-output",
+      "/path/to/tmp/json",
+      "copy",
+      "[CUSTOM_/_B_WORK]/skia/infra/bots/assets/mips64el_toolchain_linux/VERSION",
+      "/path/to/tmp/"
+    ],
+    "infra_step": true,
+    "name": "Get mips64el_toolchain_linux VERSION"
+  },
+  {
+    "cmd": [
+      "python",
+      "-u",
+      "[CUSTOM_/_B_WORK]/skia/bin/fetch-gn"
+    ],
+    "cwd": "[CUSTOM_/_B_WORK]/skia",
+    "env": {
+      "BUILDTYPE": "Release",
+      "CHROME_HEADLESS": "1",
+      "PATH": "<PATH>:RECIPE_PACKAGE_REPO[depot_tools]",
+      "SKIA_OUT": "[CUSTOM_/_B_WORK]/skia/out/Build-Debian9-GCC-loongson3a-Release"
+    },
+    "infra_step": true,
+    "name": "fetch-gn"
+  },
+  {
+    "cmd": [
+      "[CUSTOM_/_B_WORK]/skia/bin/gn",
+      "gen",
+      "[CUSTOM_/_B_WORK]/skia/out/Build-Debian9-GCC-loongson3a-Release/Release",
+      "--args=cc=\"[START_DIR]/mips64el_toolchain_linux/bin/mips64el-linux-gnuabi64-gcc-7\" cxx=\"[START_DIR]/mips64el_toolchain_linux/bin/mips64el-linux-gnuabi64-g++-7\" extra_cflags=[\"-Wno-format-truncation\", \"-Wno-uninitialized\", \"-DDUMMY_mips64el_toolchain_linux_version=42\", \"-Wno-strict-overflow\"] extra_ldflags=[\"-L[START_DIR]/mips64el_toolchain_linux/mips64el-linux-gnuabi64/lib\"] is_debug=false skia_enable_gpu=false skia_use_fontconfig=false skia_use_system_freetype2=false target_cpu=\"loongson3a\""
+    ],
+    "cwd": "[CUSTOM_/_B_WORK]/skia",
+    "env": {
+      "BUILDTYPE": "Release",
+      "CHROME_HEADLESS": "1",
+      "LD_LIBRARY_PATH": "[START_DIR]/mips64el_toolchain_linux/lib/x86_64-linux-gnu/",
+      "PATH": "<PATH>:RECIPE_PACKAGE_REPO[depot_tools]",
+      "SKIA_OUT": "[CUSTOM_/_B_WORK]/skia/out/Build-Debian9-GCC-loongson3a-Release"
+    },
+    "name": "gn gen"
+  },
+  {
+    "cmd": [
+      "ninja",
+      "-k",
+      "0",
+      "-C",
+      "[CUSTOM_/_B_WORK]/skia/out/Build-Debian9-GCC-loongson3a-Release/Release"
+    ],
+    "cwd": "[CUSTOM_/_B_WORK]/skia",
+    "env": {
+      "BUILDTYPE": "Release",
+      "CHROME_HEADLESS": "1",
+      "LD_LIBRARY_PATH": "[START_DIR]/mips64el_toolchain_linux/lib/x86_64-linux-gnu/",
+      "PATH": "<PATH>:RECIPE_PACKAGE_REPO[depot_tools]",
+      "SKIA_OUT": "[CUSTOM_/_B_WORK]/skia/out/Build-Debian9-GCC-loongson3a-Release"
+    },
+    "name": "ninja"
+  },
+  {
+    "name": "$result",
+    "recipe_result": null,
+    "status_code": 0
+  }
+]
\ No newline at end of file
diff --git a/infra/bots/recipe_modules/flavor/examples/full.py b/infra/bots/recipe_modules/flavor/examples/full.py
index 9030e2c43d..2bb86d912f 100644
--- a/infra/bots/recipe_modules/flavor/examples/full.py
+++ b/infra/bots/recipe_modules/flavor/examples/full.py
@@ -70,6 +70,7 @@ TEST_BUILDERS = [
   'Build-Debian9-Clang-x86_64-Release-NoDEPS',
   'Build-Debian9-Clang-x86_64-Release-Vulkan',
   'Build-Debian9-EMCC-wasm-Release',
+  'Build-Debian9-GCC-loongson3a-Release',
   'Build-Debian9-GCC-x86_64-Debug-EmbededResouces',
   'Build-Debian9-GCC-x86_64-Release-ANGLE',
   'Build-Debian9-GCC-x86_64-Release-Flutter_Android',
diff --git a/infra/bots/recipe_modules/flavor/gn_flavor.py b/infra/bots/recipe_modules/flavor/gn_flavor.py
index cc137ea8ad..f5efffa8b4 100644
--- a/infra/bots/recipe_modules/flavor/gn_flavor.py
+++ b/infra/bots/recipe_modules/flavor/gn_flavor.py
@@ -41,6 +41,8 @@ class GNFlavorUtils(default_flavor.DefaultFlavorUtils):
     cc, cxx = None, None
     extra_cflags = []
     extra_ldflags = []
+    args = {}
+    env = {}
 
     if compiler == 'Clang' and self.m.vars.is_linux:
       cc  = clang_linux + '/bin/clang'
@@ -56,7 +58,31 @@ class GNFlavorUtils(default_flavor.DefaultFlavorUtils):
     elif compiler == 'Clang':
       cc, cxx = 'clang', 'clang++'
     elif compiler == 'GCC':
-      cc, cxx = 'gcc', 'g++'
+      if target_arch in ['mips64el', 'loongson3a']:
+        mips64el_toolchain_linux = str(self.m.vars.slave_dir.join(
+            'mips64el_toolchain_linux'))
+        cc  = mips64el_toolchain_linux + '/bin/mips64el-linux-gnuabi64-gcc-7'
+        cxx = mips64el_toolchain_linux + '/bin/mips64el-linux-gnuabi64-g++-7'
+        env['LD_LIBRARY_PATH'] = (
+            mips64el_toolchain_linux + '/lib/x86_64-linux-gnu/')
+        extra_ldflags.append('-L' + mips64el_toolchain_linux +
+                             '/mips64el-linux-gnuabi64/lib')
+        extra_cflags.extend([
+            '-Wno-format-truncation',
+            '-Wno-uninitialized',
+            ('-DDUMMY_mips64el_toolchain_linux_version=%s' %
+             self.m.run.asset_version('mips64el_toolchain_linux'))
+        ])
+        if configuration == 'Release':
+          # This warning is only triggered when fuzz_canvas is inlined.
+          extra_cflags.append('-Wno-strict-overflow')
+        args.update({
+          'skia_use_system_freetype2': 'false',
+          'skia_use_fontconfig':       'false',
+          'skia_enable_gpu':           'false',
+        })
+      else:
+        cc, cxx = 'gcc', 'g++'
     elif compiler == 'EMCC':
       cc   = emscripten_sdk + '/emscripten/incoming/emcc'
       cxx  = emscripten_sdk + '/emscripten/incoming/em++'
@@ -91,9 +117,6 @@ class GNFlavorUtils(default_flavor.DefaultFlavorUtils):
     if 'MSAN' in extra_tokens:
       extra_ldflags.append('-L' + clang_linux + '/msan')
 
-    args = {}
-    env = {}
-
     if configuration != 'Debug':
       args['is_debug'] = 'false'
     if 'ANGLE' in extra_tokens: