From 31f9524f7ee3f744654ed9dcd8b11a257e6dfcd9 Mon Sep 17 00:00:00 2001
From: Reid Spencer <rspencer@reidspencer.com>
Date: Thu, 16 Dec 2004 08:00:46 +0000
Subject: [PATCH] Add a "make spotless" rule for environments with
 BUILD_OBJ_ROOT not equal to BUILD_OBJ_SRC. This will save the config.status
 and mklib files, then wipe out the BUILD_OBJ_ROOT, copy back config.status
 and mklib, and then run config.status to regenerate the makefiles. This
 target gives you a completely clean/fresh BUILD_OBJ_ROOT.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@18981 91177308-0d34-0410-b5e6-96231b3b80d8
---
 Makefile.rules | 15 +++++++++++++++
 1 file changed, 15 insertions(+)

diff --git a/Makefile.rules b/Makefile.rules
index 4908d4543fe..e4b620b1ad5 100644
--- a/Makefile.rules
+++ b/Makefile.rules
@@ -81,6 +81,21 @@ ifneq ($(strip $(BUILT_SOURCES)),)
 	-$(Verb) $(RM) -f $(BUILT_SOURCES)
 endif
 
+ifneq ($(BUILD_OBJ_ROOT),$(BUILD_SRC_ROOT))
+spotless:
+	$(Echo) Wiping out $(BUILD_OBJ_ROOT) and rebuilding configuration.
+	$(Verb) if test -x config.status ; then \
+	  $(MV) config.status .. ; \
+	  $(MV) mklib  .. ; \
+	  $(RM) -rf * ; \
+	  $(MV) ../config.status . ; \
+	  $(MV) ../mklib . ; \
+	  ./config.status ; \
+	else \
+	  $(EchoCmd) "make spotless" can only be run from $(BUILD_OBJ_ROOT); \
+	fi
+endif
+
 $(BUILT_SOURCES) : $(ObjMakefiles)
 
 #------------------------------------------------------------------------