Merged in autoconf branch. This provides configuration via the autoconf

system.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@7014 91177308-0d34-0410-b5e6-96231b3b80d8

125 files changed, 27225 insertions, 481 deletions

diff --git a/Makefile.common b/Makefile.common
index 88cdd97c00..e8a0697e60 100644
--- a/Makefile.common
+++ b/Makefile.common
@@ -30,14 +30,24 @@
 #    are in, if they are not in the current directory.  This should include a
 #    trailing / character.
 #
-# 6. PROJ_COMPILE - If set to 1, then this makefile can also be used to
-#    compile other projects using llvm. Note if this option is set then the
-#    following *must* hold
-#    PROJLEVEL should be set to the top of the source directory for the
-#               project files 
-#    LEVEL should be set to the top of LLVM source tree
-#    LLVM_LIB_DIR should be set to the top of the LLVM build tree
+# 6. LLVM_SRC_ROOT - If specified, points to the top of the LLVM source tree.
 #
+# 7. LLVM_OBJ_ROOT - If specified, points to the top directory where LLVM
+#    object files are placed.
+#
+# 8. BUILD_SRC_DIR - The directory which contains the current set of Makefiles
+#    and usually the source code too (unless SourceDir is set).
+#
+# 9. BUILD_SRC_ROOT - The root directory of the source code being compiled.
+#
+# 10. BUILD_OBJ_DIR - The directory where object code should be placed.
+#
+# 11. BUILD_OBJ_ROOT - The root directory for where object code should be
+#     placed.
+#
+# For building,
+# 	LLVM, LLVM_SRC_ROOT = BUILD_SRC_ROOT, and
+# 	LLVM_OBJ_ROOT = BUILD_OBJ_ROOT.
 #===-----------------------------------------------------------------------====
 
 #
@@ -76,14 +86,20 @@ BUILD_SRC_ROOT = $(shell cd $(BUILD_SRC_DIR)/$(LEVEL); pwd)
 endif
 
 #
+# Determine the path of the source tree relative from $HOME (the mythical
+# home directory).
+#
+HOME_OBJ_ROOT := $(OBJ_ROOT)/$(patsubst $(HOME)%,%,$(BUILD_SRC_ROOT))
+
+#
 # Set the object build directory.  Its location depends upon the source path
 # and where object files should go.
 #
 ifndef BUILD_OBJ_DIR
 ifeq ($(OBJ_ROOT),.)
-BUILD_OBJ_DIR = $(shell pwd)
+BUILD_OBJ_DIR = $(BUILD_SRC_DIR)
 else
-BUILD_OBJ_DIR := $(OBJ_ROOT)$(patsubst $(shell dirname $(BUILD_SRC_ROOT))%,%,$(shell cd $(BUILD_SRC_DIR); pwd))
+BUILD_OBJ_DIR := $(HOME_OBJ_ROOT)$(patsubst $(BUILD_SRC_ROOT)%,%,$(BUILD_SRC_DIR))
 endif
 endif
 
@@ -92,9 +108,9 @@ endif
 #
 ifndef BUILD_OBJ_ROOT
 ifeq ($(OBJ_ROOT),.)
-BUILD_OBJ_ROOT = $(shell cd $(LEVEL); pwd)
+BUILD_OBJ_ROOT = $(BUILD_SRC_ROOT)
 else
-BUILD_OBJ_ROOT := $(OBJ_ROOT)$(patsubst $(shell dirname $(BUILD_SRC_ROOT))%,%,$(shell cd $(BUILD_SRC_ROOT); pwd))
+BUILD_OBJ_ROOT := $(HOME_OBJ_ROOT)
 endif
 endif
 
@@ -113,16 +129,15 @@ ifndef LLVM_OBJ_ROOT
 LLVM_OBJ_ROOT = $(BUILD_OBJ_ROOT)
 endif
 
-# Figure out how to do platform specific stuff on this platform.  This is really
-# gross and should be autoconfiscated (automake actually), but should hopefully
-# work on Linux and solaris (SunOS).
-#
-UNAME := $(shell uname)
-include $(LLVM_SRC_ROOT)/Makefile.$(UNAME)
+###########################################################################
+# Default Targets:
+#	The following targets are the standard top level targets for
+#	building.
+###########################################################################
 
 ifdef SHARED_LIBRARY
 # if SHARED_LIBRARY is specified, the default is to build the dynamic lib
-dynamic ::
+all:: dynamic
 endif
 
 # Default Rule:  Make sure it's also a :: rule
@@ -134,6 +149,22 @@ install ::
 # Default rule for test.  It ensures everything has a test rule
 test::
 
+# Print out the directories used for building
+prdirs::
+	echo "Home Offset      : " $(HOME_OBJ_ROOT);
+	echo "Build Source Root: " $(BUILD_SRC_ROOT);
+	echo "Build Source Dir : " $(BUILD_SRC_DIR);
+	echo "Build Object Root: " $(BUILD_OBJ_ROOT);
+	echo "Build Object Dir : " $(BUILD_OBJ_DIR);
+	echo "LLVM  Source Root: " $(LLVM_SRC_ROOT);
+	echo "LLVM  Object Root: " $(LLVM_OBJ_ROOT);
+
+###########################################################################
+# Miscellaneous paths and commands:
+#	This section defines various configuration macros, such as where
+#	to find burg, tblgen, and libtool.
+###########################################################################
+
 #--------------------------------------------------------------------
 # Variables derived from configuration options... 
 #--------------------------------------------------------------------
@@ -157,8 +188,21 @@ else
   endif
 endif
 
+#
+# Enable this for profiling support with 'gprof'