Tests: Limit the attr_backDeploy_evolution.swift test case to running on macOS and hard code all availability versions it uses. I had hoped to get broader coverage with this test but that goal appears to be unrealistic given the variety of test bot configurations that this test is sensitive to. Hopefully this simplification will prevent further discoveries of incompatible test bot configurations.

Resolves rdar://91181116

Author: tshortli

test/attr/attr_backDeploy_evolution.swift

@@ -30,14 +30,7 @@
 //
 
 // REQUIRES: executable_test
-// REQUIRES: VENDOR=apple
-
-// This test doesn't behave as expected on some deployment targets because
-// the minimum OS versions accepted by the linker are later than the deployment
-// targets given to the compiler invocation, and therefore symbols that need
-// to be weak linked for the test to function are not.
-// UNSUPPORTED: OS=ios && CPU=arm64e
-// UNSUPPORTED: OS=watchos && CPU=x86_64
+// REQUIRES: OS=macosx
 
 // ---- (0) Prepare SDK
 // RUN: %empty-directory(%t)
@@ -49,21 +42,21 @@
 // RUN: %target-build-swift-dylib(%t/SDK_ABI/Frameworks/BackDeployHelper.framework/BackDeployHelper) \
 // RUN:   -emit-module-path %t/SDK_ABI/Frameworks/BackDeployHelper.framework/Modules/BackDeployHelper.swiftmodule/%module-target-triple.swiftmodule \
 // RUN:   -module-name BackDeployHelper -emit-module %S/Inputs/BackDeployHelper.swift \
-// RUN:   -Xfrontend -target -Xfrontend %target-next-stable-abi-triple \
+// RUN:   -target %target-cpu-apple-macosx10.15 \
 // RUN:   -Xfrontend -define-availability \
-// RUN:     -Xfrontend 'BackDeploy 1.0:macOS 10.14.3, iOS 12.1, tvOS 12.1, watchOS 5.1' \
+// RUN:     -Xfrontend 'BackDeploy 1.0:macOS 10.14.3' \
 // RUN:   -Xfrontend -define-availability \
-// RUN:     -Xfrontend 'BackDeploy 2.0:macOS 10.15, iOS 13, tvOS 13, watchOS 6' \
+// RUN:     -Xfrontend 'BackDeploy 2.0:macOS 10.15' \
 // RUN:   -Xlinker -install_name -Xlinker @rpath/BackDeployHelper.framework/BackDeployHelper \
 // RUN:   -enable-library-evolution
 
 // ---- (2) Build executable
 // RUN: %target-build-swift -emit-executable %s -g -o %t/test_ABI \
-// RUN:   -Xfrontend -target -Xfrontend %target-pre-stable-abi-triple \
+// RUN:   -target %target-cpu-apple-macosx10.14.3 \
 // RUN:   -Xfrontend -define-availability \
-// RUN:     -Xfrontend 'BackDeploy 1.0:macOS 10.14.3, iOS 12.1, tvOS 12.1, watchOS 5.1' \
+// RUN:     -Xfrontend 'BackDeploy 1.0:macOS 10.14.3' \
 // RUN:   -Xfrontend -define-availability \
-// RUN:     -Xfrontend 'BackDeploy 2.0:macOS 10.15, iOS 13, tvOS 13, watchOS 6' \
+// RUN:     -Xfrontend 'BackDeploy 2.0:macOS 10.15' \
 // RUN:   -F %t/SDK_ABI/Frameworks/ -framework BackDeployHelper \
 // RUN:   %target-rpath(@executable_path/SDK_ABI/Frameworks)
 
@@ -76,21 +69,21 @@
 // RUN: %target-build-swift-dylib(%t/SDK_BD/Frameworks/BackDeployHelper.framework/BackDeployHelper) \
 // RUN:   -emit-module-path %t/SDK_BD/Frameworks/BackDeployHelper.framework/Modules/BackDeployHelper.swiftmodule/%module-target-triple.swiftmodule \
 // RUN:   -module-name BackDeployHelper -emit-module %S/Inputs/BackDeployHelper.swift \
-// RUN:   -Xfrontend -target -Xfrontend %target-next-stable-abi-triple \
+// RUN:   -target %target-cpu-apple-macosx10.15 \
 // RUN:   -Xfrontend -define-availability \
-// RUN:     -Xfrontend 'BackDeploy 1.0:macOS 10.14.3, iOS 12.1, tvOS 12.1, watchOS 5.1' \
+// RUN:     -Xfrontend 'BackDeploy 1.0:macOS 10.14.3' \
 // RUN:   -Xfrontend -define-availability \
-// RUN:     -Xfrontend 'BackDeploy 2.0:macOS 999.0, iOS 999.0, watchOS 999.0, tvOS 999.0' \
+// RUN:     -Xfrontend 'BackDeploy 2.0:macOS 999.0' \
 // RUN:   -Xlinker -install_name -Xlinker @rpath/BackDeployHelper.framework/BackDeployHelper \
 // RUN:   -enable-library-evolution
 
 // ---- (5) Build executable
 // RUN: %target-build-swift -emit-executable %s -g -o %t/test_BD \
-// RUN:   -Xfrontend -target -Xfrontend %target-next-stable-abi-triple \
+// RUN:   -target %target-cpu-apple-macosx10.14.3 \
 // RUN:   -Xfrontend -define-availability \
-// RUN:     -Xfrontend 'BackDeploy 1.0:macOS 10.14.3, iOS 12.1, tvOS 12.1, watchOS 5.1' \
+// RUN:     -Xfrontend 'BackDeploy 1.0:macOS 10.14.3' \
 // RUN:   -Xfrontend -define-availability \
-// RUN:     -Xfrontend 'BackDeploy 2.0:macOS 999.0, iOS 999.0, watchOS 999.0, tvOS 999.0' \
+// RUN:     -Xfrontend 'BackDeploy 2.0:macOS 999.0' \
 // RUN:   -F %t/SDK_BD/Frameworks/ -framework BackDeployHelper \
 // RUN:   %target-rpath(@executable_path/SDK_BD/Frameworks)
 
@@ -103,11 +96,11 @@
 // RUN: %target-build-swift-dylib(%t/SDK_BD/Frameworks/BackDeployHelper.framework/BackDeployHelper) \
 // RUN:   -emit-module-path %t/SDK_BD/Frameworks/BackDeployHelper.framework/Modules/BackDeployHelper.swiftmodule/%module-target-triple.swiftmodule \
 // RUN:   -module-name BackDeployHelper -emit-module %S/Inputs/BackDeployHelper.swift \
-// RUN:   -Xfrontend -target -Xfrontend %target-next-stable-abi-triple \
+// RUN:   -target %target-cpu-apple-macosx10.15 \
 // RUN:   -Xfrontend -define-availability \
-// RUN:     -Xfrontend 'BackDeploy 1.0:macOS 10.14.3, iOS 12.1, tvOS 12.1, watchOS 5.1' \
+// RUN:     -Xfrontend 'BackDeploy 1.0:macOS 10.14.3' \
 // RUN:   -Xfrontend -define-availability \
-// RUN:     -Xfrontend 'BackDeploy 2.0:macOS 999.0, iOS 999.0, watchOS 999.0, tvOS 999.0' \
+// RUN:     -Xfrontend 'BackDeploy 2.0:macOS 999.0' \
 // RUN:   -Xlinker -install_name -Xlinker @rpath/BackDeployHelper.framework/BackDeployHelper \
 // RUN:   -enable-library-evolution -DSTRIP_V2_APIS