Fix swift build issue for enable-library-evolution

Author: Kyle-Ye

.github/workflows/compatibility_tests.yml

@@ -36,6 +36,8 @@ jobs:
       - name: Swift version
         run: swift --version
       - name: Run tests against Apple's RENDERBOX on macOS via SwiftPM
+        env:
+          OPENBOX_LIBRARY_EVOLUTION: 0
         run: |
           swift test \
             --build-path .build-compatibility-test-debug

.github/workflows/macos.yml

@@ -35,6 +35,8 @@ jobs:
       - name: Swift version
         run: swift --version
       - name: Build and run tests in debug mode with coverage
+        env:
+          OPENBOX_LIBRARY_EVOLUTION: 0
         run: |
           swift test \
             -c debug \
@@ -45,6 +47,8 @@ jobs:
             .build-test-debug/debug/OPENBOXPackageTests.xctest/Contents/MacOS/OPENBOXPackageTests \
             > coverage.txt
       - name: Build and run tests in release mode
+        env:
+          OPENBOX_LIBRARY_EVOLUTION: 0
         run: |
           swift test \
             -c release \

Package.swift

@@ -51,6 +51,7 @@ let libraryEvolutionCondition = envEnable("OPENBOX_LIBRARY_EVOLUTION")
 #endif
 
 if libraryEvolutionCondition {
+    // NOTE:  -enable-library-evolution is not supported on `swift build` yet.
     sharedSwiftSettings.append(.unsafeFlags(["-enable-library-evolution"]))
 }