Add .macCatalyst platform to REALM_HAVE_SECURE_TRANSPORT macro (#4954)

CHANGELOG.md

@@ -19,6 +19,7 @@
 * Fixed a rare segfault which could trigger if a user was being logged out while the access token refresh response comes in. ([#4944](https://github.com/realm/realm-core/issues/4944), since v10)
 * Fixed a bug where progress notifiers continue to be called after the download of a synced realm is complete. ([#4919](https://github.com/realm/realm-core/issues/4919))
 * Fixed an issue where the release process was only publishing armeabi-v7a Android binaries. ([#4952](https://github.com/realm/realm-core/pull/4952), since v10.6.0)
+* Fixed an issue where the Mac Catalyst target was excluded from the `REALM_HAVE_SECURE_TRANSPORT` macro in the Swift Package. This caused `'SSL/TLS protocol not supported'` to be thrown as an exception if Realm Sync is used. ([#7474](https://github.com/realm/realm-cocoa/issues/7474))
 
 ### Breaking changes
 * `App::Config::transport_factory` was replaced with `App::Config::transport`. It should now be an instance of `GenericNetworkTransport` rather than a factory for making instances. This allows the SDK to control which thread constructs the transport layer. ([#4903](https://github.com/realm/realm-core/pull/4903))

Package.swift

@@ -8,7 +8,7 @@ let versionPieces = versionStr.split(separator: "-")
 let versionCompontents = versionPieces[0].split(separator: ".")
 let versionExtra = versionPieces.count > 1 ? versionPieces[1] : ""
 
-let cxxSettings: [CXXSetting] = [
+var cxxSettings: [CXXSetting] = [
     .headerSearchPath("."),
     .define("REALM_DEBUG", .when(configuration: .debug)),
     .define("REALM_NO_CONFIG"),
@@ -21,11 +21,15 @@ let cxxSettings: [CXXSetting] = [
     .define("REALM_VERSION_MINOR", to: String(versionCompontents[1])),
     .define("REALM_VERSION_PATCH", to: String(versionCompontents[2])),
     .define("REALM_VERSION_EXTRA", to: "\"\(versionExtra)\""),
-    .define("REALM_VERSION_STRING", to: "\"\(versionStr)\""),
-
-    .define("REALM_HAVE_SECURE_TRANSPORT", to: "1", .when(platforms: [.macOS, .iOS, .tvOS, .watchOS])),
+    .define("REALM_VERSION_STRING", to: "\"\(versionStr)\"")
 ]
 
+#if swift(>=5.4)
+cxxSettings.append(.define("REALM_HAVE_SECURE_TRANSPORT", to: "1", .when(platforms: [.macOS, .macCatalyst, .iOS, .tvOS, .watchOS])))
+#else
+cxxSettings.append(.define("REALM_HAVE_SECURE_TRANSPORT", to: "1", .when(platforms: [.macOS, .iOS, .tvOS, .watchOS])))
+#endif
+
 let syncServerSources: [String] =  [
     "realm/sync/noinst/server",
 ]