From e5ab51d51f6e5cebf57db76c7f8527febc6a2b71 Mon Sep 17 00:00:00 2001
From: NAKAMURA Takumi <geek4civic@gmail.com>
Date: Sun, 16 Oct 2011 02:54:26 +0000
Subject: autoconf: Introduce --with-clang-srcdir, to build out-of-tree clang
 as tools/clang on tools/Makefile.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@142102 91177308-0d34-0410-b5e6-96231b3b80d8
---
 Makefile.config.in | 10 +++++++++-
 1 file changed, 9 insertions(+), 1 deletion(-)

(limited to 'Makefile.config.in')

diff --git a/Makefile.config.in b/Makefile.config.in
index fff482e777..9755a5de07 100644
--- a/Makefile.config.in
+++ b/Makefile.config.in
@@ -46,11 +46,19 @@ realpath = $(shell cd $(1); $(PWD))
 PROJ_OBJ_DIR  := $(call realpath, .)
 PROJ_OBJ_ROOT := $(call realpath, $(PROJ_OBJ_DIR)/$(LEVEL))
 
+CLANG_SRC_ROOT  := @CLANG_SRC_ROOT@
+
 ifeq ($(PROJECT_NAME),llvm)
 LLVM_SRC_ROOT   := $(call realpath, @abs_top_srcdir@)
 LLVM_OBJ_ROOT   := $(call realpath, @abs_top_builddir@)
 PROJ_SRC_ROOT   := $(LLVM_SRC_ROOT)
-PROJ_SRC_DIR    := $(call realpath, $(LLVM_SRC_ROOT)/$(patsubst $(PROJ_OBJ_ROOT)%,%,$(PROJ_OBJ_DIR)))
+PROJ_SRC_DIR    := $(LLVM_SRC_ROOT)$(patsubst $(PROJ_OBJ_ROOT)%,%,$(PROJ_OBJ_DIR))
+
+ifneq ($(CLANG_SRC_ROOT),)
+  CLANG_SRC_ROOT:= $(call realpath, $(CLANG_SRC_ROOT))
+  PROJ_SRC_DIR  := $(patsubst $(LLVM_SRC_ROOT)/tools/clang%,$(CLANG_SRC_ROOT)%,$(PROJ_SRC_DIR))
+endif
+
 prefix          := @prefix@
 PROJ_prefix     := $(prefix)
 PROJ_VERSION    := $(LLVMVersion)
-- 
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