Define the WEAK_NATIVEINT conditional on Delphi 12+

Author: cirras

CHANGELOG.md

@@ -7,6 +7,10 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 
 ## [Unreleased]
 
+### Added
+
+- Support for the `WEAK_NATIVEINT` symbol, which is defined from Delphi 12 onward.
+
 ### Fixed
 
 - Exceptions from empty structures (e.g., `if`) in `LoopExecutingAtMostOnce` and `RedundantJump`.

delphi-frontend/src/main/java/au/com/integradev/delphi/compiler/PredefinedConditionals.java

@@ -226,6 +226,10 @@ private Set<String> getAvailabilityConditionalDefines() {
       result.add("WEAKINTFREF");
     }
 
+    if (compilerVersion.compareTo(VERSION_ATHENS) >= 0) {
+      result.add("WEAK_NATIVEINT");
+    }
+
     if (checkToolchain(Toolchain.DCCIOSSIMARM64)) {
       result.add("IOSSIMULATOR");
     }

delphi-frontend/src/test/java/au/com/integradev/delphi/compiler/PredefinedConditionalsTest.java

@@ -406,4 +406,11 @@ void testToolchainsBeforeDelphiAthensShouldNotDefineLLVM(Toolchain toolchain) {
     assertThat(PredefinedConditionals.getConditionalDefines(toolchain, VERSION_ALEXANDRIA))
         .doesNotContain("LLVM");
   }
+
+  @ParameterizedTest
+  @EnumSource(value = Toolchain.class)
+  void testAllToolchainsAfterDelphiAlexandriaShouldDefineWeakNativeInt(Toolchain toolchain) {
+    assertThat(PredefinedConditionals.getConditionalDefines(toolchain, VERSION_ATHENS))
+        .contains("WEAK_NATIVEINT");
+  }
 }