Merge changes from topic 'ndk-weak-stubs'

* changes:
  Add NDK API codenames for old releases.
  Add support for weak symbols in the NDK stubs.

android/api_levels.go

@@ -55,7 +55,19 @@ func GetApiLevelsJson(ctx PathContext) Path {
 
 func (a *apiLevelsSingleton) GenerateBuildActions(ctx blueprint.SingletonContext) {
 	baseApiLevel := 9000
-	apiLevelsMap := map[string]int{}
+	apiLevelsMap := map[string]int{
+		"G":     9,
+		"I":     14,
+		"J":     16,
+		"J-MR1": 17,
+		"J-MR2": 18,
+		"K":     19,
+		"L":     21,
+		"L-MR1": 22,
+		"M":     23,
+		"N":     24,
+		"N-MR1": 25,
+	}
 	for i, codename := range ctx.Config().(Config).PlatformVersionAllCodenames() {
 		apiLevelsMap[codename] = baseApiLevel + i
 	}

cc/gen_stub_libs.py

@@ -347,10 +347,16 @@ class Generator(object):
                 if section_versioned and emit_version:
                     self.version_script.write('        ' + symbol.name + ';\n')
 
+                weak = ''
+                if 'weak' in symbol.tags:
+                    weak = '__attribute__((weak)) '
+
                 if 'var' in symbol.tags:
-                    self.src_file.write('int {} = 0;\n'.format(symbol.name))
+                    self.src_file.write('{}int {} = 0;\n'.format(
+                        weak, symbol.name))
                 else:
-                    self.src_file.write('void {}() {{}}\n'.format(symbol.name))
+                    self.src_file.write('{}void {}() {{}}\n'.format(
+                        weak, symbol.name))
 
             if not version_empty and section_versioned:
                 base = '' if version.base is None else ' ' + version.base

cc/test_gen_stub_libs.py

@@ -430,6 +430,8 @@ class GeneratorTest(unittest.TestCase):
             gsl.Version('VERSION_1', None, [], [
                 gsl.Symbol('foo', []),
                 gsl.Symbol('bar', ['var']),
+                gsl.Symbol('woodly', ['weak']),
+                gsl.Symbol('doodly', ['weak', 'var']),
             ]),
             gsl.Version('VERSION_2', 'VERSION_1', [], [
                 gsl.Symbol('baz', []),
@@ -443,6 +445,8 @@ class GeneratorTest(unittest.TestCase):
         expected_src = textwrap.dedent("""\
             void foo() {}
             int bar = 0;
+            __attribute__((weak)) void woodly() {}
+            __attribute__((weak)) int doodly = 0;
             void baz() {}
             void qux() {}
         """)
@@ -453,6 +457,8 @@ class GeneratorTest(unittest.TestCase):
                 global:
                     foo;
                     bar;
+                    woodly;
+                    doodly;
             };
             VERSION_2 {
                 global: