Workaround clang crash in cinterop tool (KT-34467)

Interop/Indexer/src/main/kotlin/org/jetbrains/kotlin/native/interop/indexer/Indexer.kt

@@ -958,7 +958,7 @@ fun buildNativeIndexImpl(library: NativeLibrary, verbose: Boolean): IndexerResul
 
 private fun indexDeclarations(nativeIndex: NativeIndexImpl): CompilationWithPCH {
     withIndex { index ->
-        val translationUnit = nativeIndex.library.parse(
+        val translationUnit = nativeIndex.library.copyWithArgsForPCH().parse(
                 index,
                 options = CXTranslationUnit_DetailedPreprocessingRecord or CXTranslationUnit_ForSerialization
         )

Interop/Indexer/src/main/kotlin/org/jetbrains/kotlin/native/interop/indexer/Utils.kt

@@ -257,6 +257,11 @@ fun Compilation.copy(
         language = language
 )
 
+// Clang-8 crashes when consuming a precompiled header built with -fmodule-map-file argument (see KT-34467).
+// We ignore this argument when building a pch to workaround this crash.
+fun Compilation.copyWithArgsForPCH(): Compilation =
+        copy(compilerArgs = compilerArgs.filterNot { it.startsWith("-fmodule-map-file") })
+
 data class CompilationImpl(
         override val includes: List<String>,
         override val additionalPreambleLines: List<String>,
@@ -271,7 +276,7 @@ data class CompilationImpl(
  */
 fun Compilation.precompileHeaders(): CompilationWithPCH = withIndex { index ->
     val options = CXTranslationUnit_ForSerialization
-    val translationUnit = this.parse(index, options)
+    val translationUnit = copyWithArgsForPCH().parse(index, options)
     try {
         translationUnit.ensureNoCompileErrors()
         withPrecompiledHeader(translationUnit)