Define the LLVM symbol on LLVM-based toolchains

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 `LLVM` symbol, which is defined on LLVM-based toolchains from Delphi 12 onward.
+
 ### Fixed
 
 - Parsing errors on `.dpr` files without a top-level `begin`.

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

@@ -30,6 +30,7 @@ public final class PredefinedConditionals {
   private static final CompilerVersion VERSION_2009 = CompilerVersion.fromVersionNumber("20.0");
   private static final CompilerVersion VERSION_TOKYO = CompilerVersion.fromVersionNumber("32.0");
   private static final CompilerVersion VERSION_SYDNEY = CompilerVersion.fromVersionNumber("34.0");
+  private static final CompilerVersion VERSION_ATHENS = CompilerVersion.fromVersionNumber("36.0");
 
   private final Toolchain toolchain;
   private final CompilerVersion compilerVersion;
@@ -177,7 +178,11 @@ private Set<String> getLLVMConditionalDefines() {
             Toolchain.DCCLINUX64);
 
     if (basedOnLLVM) {
-      return Set.of("EXTERNALLINKER");
+      Set<String> result = Sets.newHashSet("EXTERNALLINKER");
+      if (compilerVersion.compareTo(VERSION_ATHENS) >= 0) {
+        result.add("LLVM");
+      }
+      return result;
     } else {
       return Set.of("ASSEMBLER");
     }

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

@@ -31,6 +31,7 @@ class PredefinedConditionalsTest {
   private static final CompilerVersion VERSION_SYDNEY = CompilerVersion.fromVersionNumber("34.0");
   private static final CompilerVersion VERSION_ALEXANDRIA =
       CompilerVersion.fromVersionNumber("35.0");
+  private static final CompilerVersion VERSION_ATHENS = CompilerVersion.fromVersionNumber("36.0");
 
   private static final Set<String> NEXT_GEN_FEATURES =
       Set.of("NEXTGEN", "AUTOREFCOUNT", "WEAKINSTREF");
@@ -368,4 +369,10 @@ void testLinuxOnlySupportsNextGenFeaturesBeforeDelphiRio() {
     assertThat(PredefinedConditionals.getConditionalDefines(Toolchain.DCCLINUX64, VERSION_RIO))
         .doesNotContainAnyElementsOf(NEXT_GEN_FEATURES);
   }
+
+  @Test
+  void testVersionsAfterDelphiAlexandriaShouldDefineLLVM() {
+    assertThat(PredefinedConditionals.getConditionalDefines(Toolchain.DCCAARM64, VERSION_ATHENS))
+        .contains("LLVM");
+  }
 }