8159364: Gtest unit tests does not support PCH

Reviewed-by: erikj, jwilhelm, gtriantafill

hotspot/make/lib/CompileGtest.gmk

@@ -76,7 +76,7 @@ $(eval $(call SetupNativeCompilation, BUILD_GTEST_LIBJVM, \
     CXXFLAGS_DEBUG_SYMBOLS := $(JVM_CFLAGS_SYMBOLS), \
     DISABLED_WARNINGS_gcc := undef, \
     DISABLED_WARNINGS_clang := undef switch format-nonliteral \
-        tautological-undefined-compare, \
+        tautological-undefined-compare $(BUILD_LIBJVM_DISABLED_WARNINGS_clang), \
     DISABLED_WARNINGS_solstudio := identexpected, \
     LDFLAGS := $(JVM_LDFLAGS), \
     LDFLAGS_solaris := -library=stlport4 $(call SET_SHARED_LIBRARY_ORIGIN), \
@@ -86,6 +86,8 @@ $(eval $(call SetupNativeCompilation, BUILD_GTEST_LIBJVM, \
     USE_MAPFILE_FOR_SYMBOLS := true, \
     COPY_DEBUG_SYMBOLS := $(GTEST_COPY_DEBUG_SYMBOLS), \
     ZIP_EXTERNAL_DEBUG_SYMBOLS := false, \
+    PRECOMPILED_HEADER := $(JVM_PRECOMPILED_HEADER), \
+    PRECOMPILED_HEADER_EXCLUDE := gtest-all.cc gtestMain.cpp, \
 ))
 
 TARGETS += $(BUILD_GTEST_LIBJVM)

hotspot/test/native/runtime/test_classLoader.cpp

@@ -22,6 +22,7 @@
  *
  */
 
+#include "precompiled.hpp"
 #include "classfile/classLoader.hpp"
 #include "memory/resourceArea.hpp"
 #include "unittest.hpp"

hotspot/test/native/runtime/test_instanceKlass.cpp

@@ -22,6 +22,7 @@
  *
  */
 
+#include "precompiled.hpp"
 #include "classfile/symbolTable.hpp"
 #include "memory/resourceArea.hpp"
 #include "oops/instanceKlass.hpp"

hotspot/test/native/runtime/test_os.cpp

@@ -22,6 +22,7 @@
  *
  */
 
+#include "precompiled.hpp"
 #include "runtime/os.hpp"
 #include "unittest.hpp"
 

hotspot/test/native/utilities/test_quicksort.cpp

@@ -22,6 +22,7 @@
  *
  */
 
+#include "precompiled.hpp"
 #include "prims/jvm.h"
 #include "utilities/quickSort.hpp"
 #include "unittest.hpp"