diff --git a/android/Android.bp b/android/Android.bp
index 29a88f2..641c438 100644
--- a/android/Android.bp
+++ b/android/Android.bp
@@ -111,6 +111,7 @@
         "depset_test.go",
         "deptag_test.go",
         "expand_test.go",
+        "filegroup_test.go",
         "fixture_test.go",
         "gen_notice_test.go",
         "license_kind_test.go",
diff --git a/android/allowlists/allowlists.go b/android/allowlists/allowlists.go
index 17db472..45b8043 100644
--- a/android/allowlists/allowlists.go
+++ b/android/allowlists/allowlists.go
@@ -699,6 +699,11 @@
 
 		// for api_fingerprint.txt generation
 		"api_fingerprint",
+
+		// allowlisting for kotlinx_coroutines
+		"kotlinx_coroutines",
+		"annotations",
+		"kotlinx-coroutines-android-annotation-stubs",
 	}
 
 	Bp2buildModuleTypeAlwaysConvertList = []string{
diff --git a/android/bazel.go b/android/bazel.go
index b600758..782632b 100644
--- a/android/bazel.go
+++ b/android/bazel.go
@@ -356,6 +356,7 @@
 	withinApex := !apexInfo.IsForPlatform()
 	mixedBuildEnabled := ctx.Config().IsMixedBuildsEnabled() &&
 		ctx.Os() != Windows && // Windows toolchains are not currently supported.
+		ctx.Os() != LinuxBionic && // Linux Bionic toolchains are not currently supported.
 		module.Enabled() &&
 		convertedToBazel(ctx, module) &&
 		ctx.Config().BazelContext.IsModuleNameAllowed(module.Name(), withinApex)
diff --git a/android/config_bp2build.go b/android/config_bp2build.go
index 2beeb51..830890d 100644
--- a/android/config_bp2build.go
+++ b/android/config_bp2build.go
@@ -95,6 +95,15 @@
 	return ev.pctx.VariableConfigMethod(name, method)
 }
 
+func (ev ExportedVariables) ExportStringStaticVariableWithEnvOverride(name, envVar, defaultVal string) {
+	ev.ExportVariableConfigMethod(name, func(config Config) string {
+		if override := config.Getenv(envVar); override != "" {
+			return override
+		}
+		return defaultVal
+	})
+}
+
 // ExportSourcePathVariable declares a static "source path" variable and exports
 // it to Bazel's toolchain.
 func (ev ExportedVariables) ExportSourcePathVariable(name string, value string) {
diff --git a/android/filegroup.go b/android/filegroup.go
index 0f6e00e..278d46d 100644
--- a/android/filegroup.go
+++ b/android/filegroup.go
@@ -26,13 +26,18 @@
 )
 
 func init() {
-	RegisterModuleType("filegroup", FileGroupFactory)
+	RegisterFilegroupBuildComponents(InitRegistrationContext)
 }
 
 var PrepareForTestWithFilegroup = FixtureRegisterWithContext(func(ctx RegistrationContext) {
-	ctx.RegisterModuleType("filegroup", FileGroupFactory)
+	RegisterFilegroupBuildComponents(ctx)
 })
 
+func RegisterFilegroupBuildComponents(ctx RegistrationContext) {
+	ctx.RegisterModuleType("filegroup", FileGroupFactory)
+	ctx.RegisterModuleType("filegroup_defaults", FileGroupDefaultsFactory)
+}
+
 var convertedProtoLibrarySuffix = "_bp2build_converted"
 
 // IsFilegroup checks that a module is a filegroup type
@@ -178,6 +183,7 @@
 type fileGroup struct {
 	ModuleBase
 	BazelModuleBase
+	DefaultableModuleBase
 	FileGroupAsLibrary
 	properties fileGroupProperties
 	srcs       Paths
@@ -195,6 +201,7 @@
 	module.AddProperties(&module.properties)
 	InitAndroidModule(module)
 	InitBazelModule(module)
+	InitDefaultableModule(module)
 	return module
 }
 
@@ -326,3 +333,17 @@
 	}
 	return nil, false
 }
+
+// Defaults
+type FileGroupDefaults struct {
+	ModuleBase
+	DefaultsModuleBase
+}
+
+func FileGroupDefaultsFactory() Module {
+	module := &FileGroupDefaults{}
+	module.AddProperties(&fileGroupProperties{})
+	InitDefaultsModule(module)
+
+	return module
+}
diff --git a/android/filegroup_test.go b/android/filegroup_test.go
index 8292d5e..893da57 100644
--- a/android/filegroup_test.go
+++ b/android/filegroup_test.go
@@ -58,3 +58,24 @@
 		AssertStringEquals(t, "src full path", expectedOutputfile, fg.srcs[0].String())
 	}
 }
+
+func TestFilegroupDefaults(t *testing.T) {
+	bp := FixtureAddTextFile("p/Android.bp", `
+		filegroup_defaults {
+			name: "defaults",
+			visibility: ["//x"],
+		}
+		filegroup {
+			name: "foo",
+			defaults: ["defaults"],
+			visibility: ["//y"],
+		}
+	`)
+	result := GroupFixturePreparers(
+		PrepareForTestWithFilegroup,
+		PrepareForTestWithDefaults,
+		PrepareForTestWithVisibility,
+		bp).RunTest(t)
+	rules := effectiveVisibilityRules(result.Config, qualifiedModuleName{pkg: "p", name: "foo"})
+	AssertDeepEquals(t, "visibility", []string{"//x", "//y"}, rules.Strings())
+}
diff --git a/android/neverallow.go b/android/neverallow.go
index ba5385c..2139c3c 100644
--- a/android/neverallow.go
+++ b/android/neverallow.go
@@ -165,6 +165,7 @@
 	javaDeviceForHostProjectsAllowedList := []string{
 		"development/build",
 		"external/guava",
+		"external/kotlinx.coroutines",
 		"external/robolectric-shadows",
 		"external/robolectric",
 		"frameworks/layoutlib",
diff --git a/bp2build/aar_conversion_test.go b/bp2build/aar_conversion_test.go
index 0cda5dd..6020ee5 100644
--- a/bp2build/aar_conversion_test.go
+++ b/bp2build/aar_conversion_test.go
@@ -171,3 +171,39 @@
 			MakeNeverlinkDuplicateTarget("android_library", "TestLib"),
 		}})
 }
+
+func TestConvertAndroidLibraryKotlinCflags(t *testing.T) {
+	t.Helper()
+	RunBp2BuildTestCase(t, func(ctx android.RegistrationContext) {}, Bp2buildTestCase{
+		Description:                "Android Library with .kt srcs and kotlincflags ",
+		ModuleTypeUnderTest:        "android_library",
+		ModuleTypeUnderTestFactory: java.AndroidLibraryFactory,
+		Filesystem: map[string]string{
+			"AndroidManifest.xml": "",
+		},
+		Blueprint: `
+android_library {
+        name: "TestLib",
+        srcs: ["a.java", "b.kt"],
+        kotlincflags: ["-flag1", "-flag2"],
+}
+`,
+		ExpectedBazelTargets: []string{
+			MakeBazelTarget(
+				"android_library",
+				"TestLib",
+				AttrNameToString{
+					"srcs": `[
+        "a.java",
+        "b.kt",
+    ]`,
+					"kotlincflags": `[
+        "-flag1",
+        "-flag2",
+    ]`,
+					"manifest":       `"AndroidManifest.xml"`,
+					"resource_files": `[]`,
+				}),
+			MakeNeverlinkDuplicateTarget("android_library", "TestLib"),
+		}})
+}
diff --git a/bp2build/android_app_conversion_test.go b/bp2build/android_app_conversion_test.go
index 4d18f83..03b3d2b 100644
--- a/bp2build/android_app_conversion_test.go
+++ b/bp2build/android_app_conversion_test.go
@@ -306,3 +306,41 @@
 			}),
 		}})
 }
+
+func TestAndroidAppKotlinCflags(t *testing.T) {
+	runAndroidAppTestCase(t, Bp2buildTestCase{
+		Description:                "Android app with kotlincflags",
+		ModuleTypeUnderTest:        "android_app",
+		ModuleTypeUnderTestFactory: java.AndroidAppFactory,
+		Filesystem: map[string]string{
+			"res/res.png": "",
+		},
+		Blueprint: simpleModuleDoNotConvertBp2build("filegroup", "foocert") + `
+android_app {
+        name: "foo",
+        srcs: ["a.java", "b.kt"],
+        certificate: ":foocert",
+        manifest: "fooManifest.xml",
+        kotlincflags: ["-flag1", "-flag2"],
+}
+`,
+		ExpectedBazelTargets: []string{
+			MakeBazelTarget("android_library", "foo_kt", AttrNameToString{
+				"srcs": `[
+        "a.java",
+        "b.kt",
+    ]`,
+				"manifest":       `"fooManifest.xml"`,
+				"resource_files": `["res/res.png"]`,
+				"kotlincflags": `[
+        "-flag1",
+        "-flag2",
+    ]`,
+			}),
+			MakeBazelTarget("android_binary", "foo", AttrNameToString{
+				"deps":        `[":foo_kt"]`,
+				"certificate": `":foocert"`,
+				"manifest":    `"fooManifest.xml"`,
+			}),
+		}})
+}
diff --git a/bp2build/cc_prebuilt_library_conversion_test.go b/bp2build/cc_prebuilt_library_conversion_test.go
index 2fe158e..c5a6dfd 100644
--- a/bp2build/cc_prebuilt_library_conversion_test.go
+++ b/bp2build/cc_prebuilt_library_conversion_test.go
@@ -39,6 +39,10 @@
 				MakeBazelTarget("cc_prebuilt_library_static", "libtest_bp2build_cc_library_static", AttrNameToString{
 					"static_library": `"libf.so"`,
 				}),
+				MakeBazelTarget("cc_prebuilt_library_static", "libtest_bp2build_cc_library_static_alwayslink", AttrNameToString{
+					"static_library": `"libf.so"`,
+					"alwayslink":     "True",
+				}),
 				MakeBazelTarget("cc_prebuilt_library_shared", "libtest", AttrNameToString{
 					"shared_library": `"libf.so"`,
 				}),
@@ -71,8 +75,14 @@
         "//build/bazel/platforms/arch:arm": "libg.so",
         "//build/bazel/platforms/arch:arm64": "libf.so",
         "//conditions:default": None,
-    })`,
-				}),
+    })`}),
+				MakeBazelTarget("cc_prebuilt_library_static", "libtest_bp2build_cc_library_static_alwayslink", AttrNameToString{
+					"alwayslink": "True",
+					"static_library": `select({
+        "//build/bazel/platforms/arch:arm": "libg.so",
+        "//build/bazel/platforms/arch:arm64": "libf.so",
+        "//conditions:default": None,
+    })`}),
 				MakeBazelTarget("cc_prebuilt_library_shared", "libtest", AttrNameToString{
 					"shared_library": `select({
         "//build/bazel/platforms/arch:arm": "libg.so",
@@ -109,6 +119,12 @@
 					"export_includes":        `["testdir/1/"]`,
 					"export_system_includes": `["testdir/2/"]`,
 				}),
+				MakeBazelTarget("cc_prebuilt_library_static", "libtest_bp2build_cc_library_static_alwayslink", AttrNameToString{
+					"static_library":         `"libf.so"`,
+					"export_includes":        `["testdir/1/"]`,
+					"export_system_includes": `["testdir/2/"]`,
+					"alwayslink":             "True",
+				}),
 				// TODO(b/229374533): When fixed, update this test
 				MakeBazelTarget("cc_prebuilt_library_shared", "libtest", AttrNameToString{
 					"shared_library": `"libf.so"`,
@@ -188,6 +204,10 @@
 				MakeBazelTarget("cc_prebuilt_library_static", "libtest_bp2build_cc_library_static", AttrNameToString{
 					"static_library": `"libf.so"`,
 				}),
+				MakeBazelTarget("cc_prebuilt_library_static", "libtest_bp2build_cc_library_static_alwayslink", AttrNameToString{
+					"static_library": `"libf.so"`,
+					"alwayslink":     "True",
+				}),
 				MakeBazelTarget("cc_prebuilt_library_shared", "libtest", AttrNameToString{
 					"shared_library": `"libg.so"`,
 				}),
@@ -245,6 +265,10 @@
 //				makeBazelTarget("cc_prebuilt_library_static", "libtest_bp2build_cc_library_static", attrNameToString{
 //					"static_library": `"libf.so"`,
 //				}),
+//				makeBazelTarget("cc_prebuilt_library_static", "libtest_bp2build_cc_library_static_always", attrNameToString{
+//					"static_library": `"libf.so"`,
+//					"alwayslink": "True",
+//				}),
 //			},
 //		})
 //}
diff --git a/bp2build/cc_prebuilt_library_static_test.go b/bp2build/cc_prebuilt_library_static_test.go
index 6116b00..17da813 100644
--- a/bp2build/cc_prebuilt_library_static_test.go
+++ b/bp2build/cc_prebuilt_library_static_test.go
@@ -39,6 +39,10 @@
 				MakeBazelTarget("cc_prebuilt_library_static", "libtest", AttrNameToString{
 					"static_library": `"libf.so"`,
 				}),
+				MakeBazelTarget("cc_prebuilt_library_static", "libtest_alwayslink", AttrNameToString{
+					"static_library": `"libf.so"`,
+					"alwayslink":     "True",
+				}),
 			},
 		})
 }
@@ -68,8 +72,14 @@
         "//build/bazel/platforms/arch:arm": "libg.so",
         "//build/bazel/platforms/arch:arm64": "libf.so",
         "//conditions:default": None,
-    })`,
-				}),
+    })`}),
+				MakeBazelTarget("cc_prebuilt_library_static", "libtest_alwayslink", AttrNameToString{
+					"alwayslink": "True",
+					"static_library": `select({
+        "//build/bazel/platforms/arch:arm": "libg.so",
+        "//build/bazel/platforms/arch:arm64": "libf.so",
+        "//conditions:default": None,
+    })`}),
 			},
 		})
 }
diff --git a/bp2build/java_binary_host_conversion_test.go b/bp2build/java_binary_host_conversion_test.go
index 6f17e34..278a9bf 100644
--- a/bp2build/java_binary_host_conversion_test.go
+++ b/bp2build/java_binary_host_conversion_test.go
@@ -284,3 +284,38 @@
 		},
 	})
 }
+
+func TestJavaBinaryHostKotlinCflags(t *testing.T) {
+	runJavaBinaryHostTestCase(t, Bp2buildTestCase{
+		Description: "java_binary_host with kotlincflags",
+		Filesystem:  testFs,
+		Blueprint: `java_binary_host {
+    name: "java-binary-host",
+    manifest: "test.mf",
+    srcs: ["a.kt"],
+    kotlincflags: ["-flag1", "-flag2"],
+}
+`,
+		ExpectedBazelTargets: []string{
+			MakeBazelTarget("kt_jvm_library", "java-binary-host_kt", AttrNameToString{
+				"srcs": `["a.kt"]`,
+				"kotlincflags": `[
+        "-flag1",
+        "-flag2",
+    ]`,
+				"target_compatible_with": `select({
+        "//build/bazel/platforms/os:android": ["@platforms//:incompatible"],
+        "//conditions:default": [],
+    })`,
+			}),
+			MakeBazelTarget("java_binary", "java-binary-host", AttrNameToString{
+				"main_class":   `"com.android.test.MainClass"`,
+				"runtime_deps": `[":java-binary-host_kt"]`,
+				"target_compatible_with": `select({
+        "//build/bazel/platforms/os:android": ["@platforms//:incompatible"],
+        "//conditions:default": [],
+    })`,
+			}),
+		},
+	})
+}
diff --git a/bp2build/java_library_conversion_test.go b/bp2build/java_library_conversion_test.go
index f1d6398..e3c4857 100644
--- a/bp2build/java_library_conversion_test.go
+++ b/bp2build/java_library_conversion_test.go
@@ -673,7 +673,7 @@
 
 func TestJavaLibraryKotlinSrcs(t *testing.T) {
 	runJavaLibraryTestCase(t, Bp2buildTestCase{
-		Description: "java_library with kotlin  srcs",
+		Description: "java_library with kotlin srcs",
 		Blueprint: `java_library {
     name: "java-lib-1",
     srcs: ["a.java", "b.java", "c.kt"],
@@ -693,9 +693,32 @@
 	})
 }
 
+func TestJavaLibraryKotlincflags(t *testing.T) {
+	runJavaLibraryTestCase(t, Bp2buildTestCase{
+		Description: "java_library with kotlincfalgs",
+		Blueprint: `java_library {
+    name: "java-lib-1",
+    srcs: [ "a.kt"],
+    kotlincflags: ["-flag1", "-flag2"],
+    bazel_module: { bp2build_available: true },
+}
+`,
+		ExpectedBazelTargets: []string{
+			MakeBazelTarget("kt_jvm_library", "java-lib-1", AttrNameToString{
+				"srcs": `["a.kt"]`,
+				"kotlincflags": `[
+        "-flag1",
+        "-flag2",
+    ]`,
+			}),
+			MakeNeverlinkDuplicateTarget("kt_jvm_library", "java-lib-1"),
+		},
+	})
+}
+
 func TestJavaLibraryKotlinCommonSrcs(t *testing.T) {
 	runJavaLibraryTestCase(t, Bp2buildTestCase{
-		Description: "java_library with kotlin  common_srcs",
+		Description: "java_library with kotlin common_srcs",
 		Blueprint: `java_library {
     name: "java-lib-1",
     srcs: ["a.java", "b.java"],
diff --git a/cc/check.go b/cc/check.go
index 3d290a9..58ff5b2 100644
--- a/cc/check.go
+++ b/cc/check.go
@@ -57,6 +57,10 @@
 				} else if strings.HasPrefix("../", path) {
 					ctx.PropertyErrorf(prop, "Path must not start with `../`: `%s`. Use include_dirs to -include from a different directory", flag)
 				}
+			} else if args[0] == "-mllvm" {
+				if len(args) > 2 {
+					ctx.PropertyErrorf(prop, "`-mllvm` only takes one argument: `%s`", flag)
+				}
 			} else if strings.HasPrefix(flag, "-D") && strings.Contains(flag, "=") {
 				// Do nothing in this case.
 				// For now, we allow space characters in -DNAME=def form to allow use cases
diff --git a/cc/config/global.go b/cc/config/global.go
index 8f30bc1..6b45b12 100644
--- a/cc/config/global.go
+++ b/cc/config/global.go
@@ -416,15 +416,12 @@
 	exportedVars.ExportStringList("CommonGlobalIncludes", commonGlobalIncludes)
 	pctx.PrefixedExistentPathsForSourcesVariable("CommonGlobalIncludes", "-I", commonGlobalIncludes)
 
-	exportedVars.ExportStringStaticVariable("CLANG_DEFAULT_VERSION", ClangDefaultVersion)
-	exportedVars.ExportStringStaticVariable("CLANG_DEFAULT_SHORT_VERSION", ClangDefaultShortVersion)
-
 	pctx.StaticVariableWithEnvOverride("ClangBase", "LLVM_PREBUILTS_BASE", ClangDefaultBase)
-	pctx.StaticVariableWithEnvOverride("ClangVersion", "LLVM_PREBUILTS_VERSION", ClangDefaultVersion)
+	exportedVars.ExportStringStaticVariableWithEnvOverride("ClangVersion", "LLVM_PREBUILTS_VERSION", ClangDefaultVersion)
 	pctx.StaticVariable("ClangPath", "${ClangBase}/${HostPrebuiltTag}/${ClangVersion}")
 	pctx.StaticVariable("ClangBin", "${ClangPath}/bin")
 
-	pctx.StaticVariableWithEnvOverride("ClangShortVersion", "LLVM_RELEASE_VERSION", ClangDefaultShortVersion)
+	exportedVars.ExportStringStaticVariableWithEnvOverride("ClangShortVersion", "LLVM_RELEASE_VERSION", ClangDefaultShortVersion)
 	pctx.StaticVariable("ClangAsanLibDir", "${ClangBase}/linux-x86/${ClangVersion}/lib/clang/${ClangShortVersion}/lib/linux")
 
 	// These are tied to the version of LLVM directly in external/llvm, so they might trail the host prebuilts
diff --git a/cc/prebuilt.go b/cc/prebuilt.go
index bb517ea..5b7ba43 100644
--- a/cc/prebuilt.go
+++ b/cc/prebuilt.go
@@ -352,6 +352,7 @@
 	Static_library         bazel.LabelAttribute
 	Export_includes        bazel.StringListAttribute
 	Export_system_includes bazel.StringListAttribute
+	Alwayslink             bazel.BoolAttribute
 }
 
 // TODO(b/228623543): The below is not entirely true until the bug is fixed. For now, both targets are always generated
@@ -389,6 +390,11 @@
 
 	tags := android.ApexAvailableTags(module)
 	ctx.CreateBazelTargetModuleWithRestrictions(props, android.CommonAttributes{Name: name, Tags: tags}, attrs, prebuiltAttrs.Enabled)
+
+	_true := true
+	alwayslinkAttrs := *attrs
+	alwayslinkAttrs.Alwayslink.SetValue(&_true)
+	ctx.CreateBazelTargetModuleWithRestrictions(props, android.CommonAttributes{Name: name + "_alwayslink", Tags: tags}, &alwayslinkAttrs, prebuiltAttrs.Enabled)
 }
 
 type bazelPrebuiltLibrarySharedAttributes struct {
diff --git a/java/java.go b/java/java.go
index e8f78ba..15ee4a9 100644
--- a/java/java.go
+++ b/java/java.go
@@ -2787,11 +2787,12 @@
 	depLabels.StaticDeps = bazel.MakeLabelListAttribute(staticDeps)
 
 	hasKotlin := !kotlinSrcs.IsEmpty()
+	commonAttrs.kotlinAttributes = &kotlinAttributes{
+		Kotlincflags: &m.properties.Kotlincflags,
+	}
 	if len(m.properties.Common_srcs) != 0 {
 		hasKotlin = true
-		commonAttrs.kotlinAttributes = &kotlinAttributes{
-			bazel.MakeLabelListAttribute(android.BazelLabelForModuleSrc(ctx, m.properties.Common_srcs)),
-		}
+		commonAttrs.kotlinAttributes.Common_srcs = bazel.MakeLabelListAttribute(android.BazelLabelForModuleSrc(ctx, m.properties.Common_srcs))
 	}
 
 	bp2BuildInfo := &bp2BuildJavaInfo{
@@ -2810,7 +2811,8 @@
 }
 
 type kotlinAttributes struct {
-	Common_srcs bazel.LabelListAttribute
+	Common_srcs  bazel.LabelListAttribute
+	Kotlincflags *[]string
 }
 
 func javaLibraryBp2Build(ctx android.TopDownMutatorContext, m *Library) {
diff --git a/java/lint_defaults.txt b/java/lint_defaults.txt
index 061f4d0..1bb4996 100644
--- a/java/lint_defaults.txt
+++ b/java/lint_defaults.txt
@@ -40,6 +40,13 @@
 # NewApi checks will continue to be enforced for apex deps since
 # lint.strict_updatability_linting will be true for those Soong modules
 --disable_check NewApi
+# Disable ChromeOS specific checks
+--disable_check PermissionImpliesUnsupportedChromeOsHardware
+# Disable UnsafeImplicitIntentLaunch until it can avoid false positives/crash
+# TODO(265425607)
+--disable_check UnsafeImplicitIntentLaunch
+# InvalidId will give errors on ids defined like android:id="@androidprv:id/contentPanel"
+--disable_check InvalidId
 
 # Downgrade existing errors to warnings
 --warning_check AppCompatResource                  # 55 occurences in 10 modules
diff --git a/third_party/zip/writer.go b/third_party/zip/writer.go
index f526838..8a957e1 100644
--- a/third_party/zip/writer.go
+++ b/third_party/zip/writer.go
@@ -162,9 +162,17 @@
 		if records > uint16max {
 			records = uint16max
 		}
+		// Only store uint32max for the size and the offset if they don't fit.
+		// Robolectric currently doesn't support zip64 and fails to find the
+		// offset to the central directory when the number of files in the zip
+		// is larger than 2^16.
+		if size > uint32max {
+			size = uint32max
+		}
+		if offset > uint32max {
+			offset = uint32max
+		}
 		// END ANDROID CHANGE
-		size = uint32max
-		offset = uint32max
 	}
 
 	// write end record