# HG changeset patch
# User erikj
# Date 1526488620 25200
# Node ID ea4e6d3dbf6033521a5abbc557b52c4badaa2788
# Parent  4bf83d5c3a6391eaf9d3c6791f6a187acca2e190
8202738: vm_version Abstract_VM_Version::internal_vm_info_string() returns same string for different incremental builds
Reviewed-by: ihse, jiangli

diff -r 4bf83d5c3a63 -r ea4e6d3dbf60 make/common/NativeCompilation.gmk
--- a/make/common/NativeCompilation.gmk	Wed May 16 18:03:20 2018 +0200
+++ b/make/common/NativeCompilation.gmk	Wed May 16 09:37:00 2018 -0700
@@ -391,6 +391,13 @@
 #   STRIPFLAGS Optionally change the flags given to the strip command
 #   PRECOMPILED_HEADER Header file to use as precompiled header
 #   PRECOMPILED_HEADER_EXCLUDE List of source files that should not use PCH
+#
+# After being called, some variables are exported from this macro, all prefixed
+# with parameter 1 followed by a '_':
+#   TARGET The library or executable created by the macro
+#   TARGET_DEPS All prerequisites for the target calculated by the macro
+#   ALL_OBJS All object files
+#   IMPORT_LIBRARY The import library created for a shared library on Windows
 SetupNativeCompilation = $(NamedParamsMacroTemplate)
 define SetupNativeCompilationBody
 
@@ -874,7 +881,9 @@
       endif
     endif
 
-    $$($1_TARGET): $$($1_ALL_OBJS) $$($1_RES) $$($1_VARDEPS_FILE) $$(STATIC_MAPFILE_DEP)
+    $1_TARGET_DEPS := $$($1_ALL_OBJS) $$($1_RES) $$($1_VARDEPS_FILE) $$(STATIC_MAPFILE_DEP)
+
+    $$($1_TARGET): $$($1_TARGET_DEPS)
 	$$(call LogInfo, Building static library $$($1_BASENAME))
 	$$(call ExecuteWithLog, $$($1_OBJECT_DIR)/$$($1_SAFE_NAME)_link, \
 	    $$($1_AR) $$($1_ARFLAGS) $(AR_OUT_OPTION)$$($1_TARGET) $$($1_ALL_OBJS) \
@@ -964,8 +973,10 @@
       endif
     endif
 
-    $$($1_TARGET): $$($1_ALL_OBJS) $$($1_RES) $$($1_MANIFEST) \
+    $1_TARGET_DEPS := $$($1_ALL_OBJS) $$($1_RES) $$($1_MANIFEST) \
         $$($1_REAL_MAPFILE) $$($1_VARDEPS_FILE)
+
+    $$($1_TARGET): $$($1_TARGET_DEPS)
                 ifneq ($$($1_OBJ_FILE_LIST), )
                   ifeq ($$($1_LINK_OBJS_RELATIVE), true)
 		    $$(eval $$(call ListPathsSafely, $1_ALL_OBJS_RELATIVE, $$($1_OBJ_FILE_LIST)))
diff -r 4bf83d5c3a63 -r ea4e6d3dbf60 make/hotspot/lib/CompileJvm.gmk
--- a/make/hotspot/lib/CompileJvm.gmk	Wed May 16 18:03:20 2018 +0200
+++ b/make/hotspot/lib/CompileJvm.gmk	Wed May 16 09:37:00 2018 -0700
@@ -177,6 +177,13 @@
     PRECOMPILED_HEADER_EXCLUDE := $(JVM_PRECOMPILED_HEADER_EXCLUDE), \
 ))
 
+# Always recompile vm_version.cpp if libjvm needs to be relinked. This ensures
+# that the internal vm version is updated as it relies on __DATE__ and __TIME__
+# macros.
+VM_VERSION_OBJ := $(JVM_OUTPUTDIR)/objs/vm_version$(OBJ_SUFFIX)
+$(VM_VERSION_OBJ): $(filter-out $(VM_VERSION_OBJ) $(JVM_MAPFILE), \
+    $(BUILD_LIBJVM_TARGET_DEPS))
+
 ifeq ($(OPENJDK_TARGET_OS), windows)
   # It doesn't matter which jvm.lib file gets exported, but we need
   # to pick just one.