From dd464df687faf544e83684d0c0e4da87c05f8bfe Mon Sep 17 00:00:00 2001
From: Daniel Dunbar <daniel@zuster.org>
Date: Mon, 10 May 2010 20:11:56 +0000
Subject: Add new configure option, --disable-timestamps, intended to turn off
 anything which would mess up binary/object comparisons. Currently:  -
 Disables 'Built on ...' in 'foo --version'.  - Disables timestamps from being
 embedded into .dir files.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@103423 91177308-0d34-0410-b5e6-96231b3b80d8
---
 Makefile.rules | 10 +++++++++-
 1 file changed, 9 insertions(+), 1 deletion(-)

(limited to 'Makefile.rules')

diff --git a/Makefile.rules b/Makefile.rules
index d70215e94a..d77fe27b27 100644
--- a/Makefile.rules
+++ b/Makefile.rules
@@ -447,6 +447,14 @@ else
   endif
 endif
 
+# Support makefile variable to disable any kind of timestamp/non-deterministic
+# info from being used in the build.
+ifeq ($(ENABLE_TIMESTAMPS),1)
+  DOTDIR_TIMESTAMP_COMMAND := $(DATE)
+else
+  DOTDIR_TIMESTAMP_COMMAND := echo 'Created.'
+endif
+
 ifeq ($(HOST_OS),MingW)
   # Work around PR4957
   CPP.Defines += -D__NO_CTYPE_INLINE
@@ -779,7 +787,7 @@ $(DESTDIR)$(PROJ_bindir) $(DESTDIR)$(PROJ_libdir) $(DESTDIR)$(PROJ_includedir) $
 # To create other directories, as needed, and timestamp their creation
 %/.dir:
 	$(Verb) $(MKDIR) $* > /dev/null
-	$(Verb) $(DATE) > $@
+	$(Verb) $(DOTDIR_TIMESTAMP_COMMAND) > $@
 
 .PRECIOUS: $(ObjDir)/.dir $(LibDir)/.dir $(ToolDir)/.dir $(ExmplDir)/.dir
 .PRECIOUS: $(LLVMLibDir)/.dir $(LLVMToolDir)/.dir $(LLVMExmplDir)/.dir
-- 
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