projects/sample: Import adapted form of current LLVM autoconf/Makefile setup so that projects/sample is standalone and not tied to the LLVM build setup.

 - This currently just moves over all of the behavior from LLVM. Eventually all of the configure checks that are directly needed by the LLVM build setup should probably go away, and the project should manage their own configuration checks if necessary.

 - This is the 1st half of this work, the actual Makefile.common hasn't moved over yet. I've tried to stage this in such a way that incremental builds will properly reconfigure for most active developers (the Makefiles don't handle reconfiguring in a perfectly reliable way, and I haven't found an easy way to make them do so).

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@142456 91177308-0d34-0410-b5e6-96231b3b80d8

32 files changed, 18811 insertions, 48 deletions

diff --git a/projects/sample/Makefile.common.in b/projects/sample/Makefile.common.in
index 33bfcd6788..ac08a52ac5 100644
--- a/projects/sample/Makefile.common.in
+++ b/projects/sample/Makefile.common.in
@@ -1,7 +1,7 @@
 # Set the name of the project here
 PROJECT_NAME := sample
 PROJ_VERSION := 0.9
- 
+
 # Set this variable to the top of the LLVM source tree.
 LLVM_SRC_ROOT = @LLVM_SRC@
 
@@ -13,7 +13,7 @@ LLVM_OBJ_ROOT = @LLVM_OBJ@
 PROJ_SRC_ROOT := $(subst //,/,@abs_top_srcdir@)
 
 # Set the root directory of this project's object files
-PROJ_OBJ_ROOT := $(subst //,/,@abs_top_objdir@)
+PROJ_OBJ_ROOT := $(subst //,/,@abs_top_builddir@)
 
 # Set the root directory of this project's install prefix
 PROJ_INSTALL_ROOT := @prefix@
diff --git a/projects/sample/Makefile.llvm.config.in b/projects/sample/Makefile.llvm.config.in
new file mode 100644
index 0000000000..a53e7b165b
--- /dev/null
+++ b/projects/sample/Makefile.llvm.config.in
@@ -0,0 +1,309 @@
+#===-- Makefile.config - Local configuration for LLVM ------*- Makefile -*--===#
+#
+#                     The LLVM Compiler Infrastructure
+#
+# This file is distributed under the University of Illinois Open Source
+# License. See LICENSE.TXT for details.
+#
+#===------------------------------------------------------------------------===#
+#
+# This file is included by Makefile.common.  It defines paths and other
+# values specific to a particular installation of LLVM.
+#
+#===------------------------------------------------------------------------===#
+
+# Define LLVM specific info and directories based on the autoconf variables
+LLVMVersion       := @LLVM_VERSION@
+
+###########################################################################
+# Directory Configuration
+#	This section of the Makefile determines what is where.  To be
+#	specific, there are several locations that need to be defined:
+#
+#	o LLVM_SRC_ROOT  : The root directory of the LLVM source code.
+#	o LLVM_OBJ_ROOT  : The root directory containing the built LLVM code.
+#
+#	o PROJ_SRC_DIR  : The directory containing the code to build.
+#	o PROJ_SRC_ROOT : The root directory of the code to build.
+#
+#	o PROJ_OBJ_DIR  : The directory in which compiled code will be placed.
+#	o PROJ_OBJ_ROOT : The root directory in which compiled code is placed.
+#
+###########################################################################
+
+PWD := @BINPWD@
+
+# The macro below is expanded when 'realpath' is not built-in.
+# Built-in 'realpath' is available on GNU Make 3.81.
+realpath = $(shell cd $(1); $(PWD))
+
+PROJ_OBJ_DIR  := $(call realpath, .)
+PROJ_OBJ_ROOT := $(call realpath, $(PROJ_OBJ_DIR)/$(LEVEL))
+
+ifndef PROJ_SRC_ROOT
+$(error Projects must define PROJ_SRC_ROOT)
+endif
+ifndef PROJ_OBJ_ROOT
+$(error Projects must define PROJ_OBJ_ROOT)
+endif
+ifndef PROJ_INSTALL_ROOT
+$(error Projects must define PROJ_INSTALL_ROOT)
+endif
+ifndef LLVM_SRC_ROOT
+$(error Projects must define LLVM_SRC_ROOT)
+endif
+ifndef LLVM_OBJ_ROOT
+$(error Projects must define LLVM_OBJ_ROOT)
+endif
+PROJ_SRC_DIR := $(call realpath, $(PROJ_SRC_ROOT)/$(patsubst $(PROJ_OBJ_ROOT)%,%,$(PROJ_OBJ_DIR)))
+prefix          := $(PROJ_INSTALL_ROOT)
+PROJ_prefix     := $(prefix)
+ifndef PROJ_VERSION
+PROJ_VERSION := 1.0
+endif
+
+PROJ_bindir     := $(PROJ_prefix)/bin
+PROJ_libdir     := $(PROJ_prefix)/lib
+PROJ_datadir    := $(PROJ_prefix)/share
+PROJ_docsdir    := $(PROJ_prefix)/docs/llvm
+PROJ_etcdir     := $(PROJ_prefix)/etc/llvm
+PROJ_includedir := $(PROJ_prefix)/include
+PROJ_infodir    := $(PROJ_prefix)/info
+PROJ_mandir     := $(PROJ_prefix)/share/man
+
+# Determine if we're on a unix type operating system
+LLVM_ON_UNIX:=@LLVM_ON_UNIX@
+LLVM_ON_WIN32:=@LLVM_ON_WIN32@
+
+# Host operating system for which LLVM will be run.
+OS=@OS@
+HOST_OS=@HOST_OS@
+# Target operating system for which LLVM will compile for.
+TARGET_OS=@TARGET_OS@
+
+# Target hardware architecture
+ARCH=@ARCH@
+
+# Indicates, whether we're cross-compiling LLVM or not
+LLVM_CROSS_COMPILING=@LLVM_CROSS_COMPILING@
+
+# Executable file extension for build platform (mainly for
+# tablegen call if we're cross-compiling).
+BUILD_EXEEXT=@BUILD_EXEEXT@
+
+# Compilers for the build platflorm (mainly for tablegen
+# call if we're cross-compiling).
+BUILD_CC=@BUILD_CC@
+BUILD_CXX=@BUILD_CXX@
+
+# Triple for configuring build tools when cross-compiling
+BUILD_TRIPLE=@build@
+
+# Target triple (cpu-vendor-os) for which we should generate code
+TARGET_TRIPLE=@target@
+
+# Extra options to compile LLVM with
+EXTRA_OPTIONS=@EXTRA_OPTIONS@
+
+# Extra options to link LLVM with
+EXTRA_LD_OPTIONS=@EXTRA_LD_OPTIONS@
+
+# Endian-ness of the target
+ENDIAN=@ENDIAN@
+
+# Path to the C++ compiler to use.  This is an optional setting, which defaults
+# to whatever your gmake defaults to.
+CXX = @CXX@
+
+# Path to the CC binary, which use used by testcases for native builds.
+CC := @CC@
+
+# Linker flags.
+LDFLAGS+=@LDFLAGS@
+
+# Path to the library archiver program.
+AR_PATH = @AR@
+AR = @AR@
+
+# Path to the nm program
+NM_PATH = @NM@
+
+# The pathnames of the programs we require to build
+CMP        := @CMP@
+CP         := @CP@
+DATE       := @DATE@
+FIND       := @FIND@
+GREP       := @GREP@
+INSTALL    := @INSTALL@
+MKDIR      := $(PROJ_SRC_ROOT)/autoconf/mkinstalldirs
+MV         := @MV@
+RANLIB     := @RANLIB@
+RM         := @RM@
+SED        := @SED@
+TAR        := @TAR@
+
+# Paths to miscellaneous programs we hope are present but might not be
+PERL       := @PERL@
+BZIP2      := @BZIP2@
+CAT        := @CAT@
+DOT        := @DOT@
+DOXYGEN    := @DOXYGEN@
+GROFF      := @GROFF@
+GZIPBIN    := @GZIPBIN@
+OCAMLC     := @OCAMLC@
+OCAMLOPT   := @OCAMLOPT@
+OCAMLDEP   := @OCAMLDEP@
+OCAMLDOC   := @OCAMLDOC@
+GAS        := @GAS@
+POD2HTML   := @POD2HTML@
+POD2MAN    := @POD2MAN@
+PDFROFF    := @PDFROFF@
+RUNTEST    := @RUNTEST@
+TCLSH      := @TCLSH@
+ZIP        := @ZIP@
+
+HAVE_PERL    := @HAVE_PERL@
+HAVE_PTHREAD := @HAVE_PTHREAD@
+
+LIBS       := @LIBS@
+
+# Targets that we should build
+TARGETS_TO_BUILD=@TARGETS_TO_BUILD@
+
+# Path to directory where object files should be stored during a build.
+# Set OBJ_ROOT to "." if you do not want to use a separate place for
+# object files.
+OBJ_ROOT := .
+
+# What to pass as rpath flag to g++
+RPATH := @RPATH@
+
+# What to pass as -rdynamic flag to g++
+RDYNAMIC := @RDYNAMIC@
+
+# These are options that can either be enabled here, or can be enabled on the
+# make command line (ie, make ENABLE_PROFILING=1):
+
+# When ENABLE_OPTIMIZED is enabled, LLVM code is optimized and output is put
+# into the "Release" directories. Otherwise, LLVM code is not optimized and
+# output is put in the "Debug" directories.
+#ENABLE_OPTIMIZED = 1
+@ENABLE_OPTIMIZED@
+
+# When ENABLE_PROFILING is enabled, profile instrumentation is done
+# and output is put into the "<Flavor>+Profile" directories, where
+# <Flavor> is either Debug or Release depending on how other build
+# flags are set. Otherwise, output is put in the <Flavor>
+# directories.
+#ENABLE_PROFILING = 1
+@ENABLE_PROFILING@
+
+# When DISABLE_ASSERTIONS is enabled, builds of all of the LLVM code will
+# exclude assertion checks, otherwise they are included.
+#DISABLE_ASSERTIONS = 1
+@DISABLE_ASSERTIONS@
+
+# When ENABLE_EXPENSIVE_CHECKS is enabled, builds of all of the LLVM
+# code will include expensive checks, otherwise they are excluded.
+#ENABLE_EXPENSIVE_CHECKS = 0
+@ENABLE_EXPENSIVE_CHECKS@
+
+# When DEBUG_RUNTIME is enabled, the runtime libraries will retain debug
+# symbols.
+#DEBUG_RUNTIME = 1
+@DEBUG_RUNTIME@
+
+# When DEBUG_SYMBOLS is enabled, the compiler libraries will retain debug
+# symbols.
+#DEBUG_SYMBOLS = 1
+@DEBUG_SYMBOLS@
+
+# The compiler flags to use for optimized builds.
+OPTIMIZE_OPTION := @OPTIMIZE_OPTION@
+
+# When ENABLE_PROFILING is enabled, the llvm source base is built with profile
+# information to allow gprof to be used to get execution frequencies.
+#ENABLE_PROFILING = 1
+
+# When ENABLE_DOCS is disabled, docs/ will not be built.
+ENABLE_DOCS = @ENABLE_DOCS@
+
+# When ENABLE_DOXYGEN is enabled, the doxygen documentation will be built
+ENABLE_DOXYGEN = @ENABLE_DOXYGEN@
+
+# Do we want to enable threads?
+ENABLE_THREADS := @ENABLE_THREADS@
+
+# Do we want to build with position independent code?
+ENABLE_PIC := @ENABLE_PIC@
+
+# Do we want to build a shared library and link the tools with it?
+ENABLE_SHARED := @ENABLE_SHARED@
+
+# Do we want to link the stdc++ into a shared library? (Cygming)
+ENABLE_EMBED_STDCXX := @ENABLE_EMBED_STDCXX@
+
+# Use -fvisibility-inlines-hidden?
+ENABLE_VISIBILITY_INLINES_HIDDEN := @ENABLE_VISIBILITY_INLINES_HIDDEN@
+
+# Do we want to allow timestamping information into builds?
+ENABLE_TIMESTAMPS := @ENABLE_TIMESTAMPS@
+
+# This option tells the Makefiles to produce verbose output.
+# It essentially prints the commands that make is executing
+#VERBOSE = 1
+
+# Enable JIT for this platform
+TARGET_HAS_JIT = @TARGET_HAS_JIT@
+
+# Environment variable to set to change the runtime shared library search path.
+SHLIBPATH_VAR = @SHLIBPATH_VAR@
+
+# Shared library extension for host platform.
+SHLIBEXT = @SHLIBEXT@
+
+# Executable file extension for host platform.
+EXEEXT = @EXEEXT@
+
+# Things we just assume are "there"
+ECHO := echo
+
+# Get the options for causing archives to link all their content instead of
+# just missing symbols, and the inverse of that. This is used for certain LLVM
+# tools that permit loadable modules. It ensures that the LLVM symbols will be
+# available to those loadable modules.
+LINKALL := @LINKALL@
+NOLINKALL := @NOLINKALL@
+
+# Get the value of HUGE_VAL_SANITY which will be either "yes" or "no" depending
+# on the check.
+HUGE_VAL_SANITY = @HUGE_VAL_SANITY@
+
+# Bindings that we should build
+BINDINGS_TO_BUILD := @BINDINGS_TO_BUILD@
+ALL_BINDINGS      := @ALL_BINDINGS@
+OCAML_LIBDIR      := @OCAML_LIBDIR@
+
+# When compiling under Mingw/Cygwin, executables such as tblgen
+# expect Windows paths, whereas the build system uses Unix paths.
+# The function SYSPATH transforms Unix paths into Windows paths.
+ifneq (,$(findstring -mno-cygwin, $(CXX)))
+  SYSPATH = $(shell echo $(1) | cygpath -m -f -)
+else
+  SYSPATH = $(1)
+endif
+
+# Location of the plugin header file for gold.
+BINUTILS_INCDIR := @BINUTILS_INCDIR@
+
+# Optional flags supported by the compiler
+# -Wno-missing-field-initializers
+NO_MISSING_FIELD_INITIALIZERS = @NO_MISSING_FIELD_INITIALIZERS@
+# -Wno-variadic-macros
+NO_VARIADIC_MACROS = @NO_VARIADIC_MACROS@
+
+# Was polly found in tools/polly?
+LLVM_HAS_POLLY = @LLVM_HAS_POLLY@
+# Flags supported by the linker.
+# bfd ld / gold --version-script=file
+HAVE_LINK_VERSION_SCRIPT = @HAVE_LINK_VERSION_SCRIPT@
diff --git a/projects/sample/Makefile.llvm.rules b/projects/sample/Makefile.llvm.rules
new file mode 100644
index 0000000000..f496bd4bc6
--- /dev/null
+++ b/projects/sample/Makefile.llvm.rules
@@ -0,0 +1,2245 @@
+#===-- Makefile.rules - Common make rules for LLVM ---------*- Makefile -*--===#
+#
+#                     The LLVM Compiler Infrastructure
+#
+# This file is distributed under the University of Illinois Open Source
+# License. See LICENSE.TXT for details.
+#
+#===------------------------------------------------------------------------===#
+#
+# This file is included by all of the LLVM makefiles.  For details on how to use
+# it properly, please see the document MakefileGuide.html in the docs directory.
+#
+#===-----------------------------------------------------------------------====#
+
+################################################################################
+# TARGETS: Define standard targets that can be invoked
+################################################################################
+
+#--------------------------------------------------------------------
+# Define the various target sets
+#--------------------------------------------------------------------
+RecursiveTargets := all clean clean-all install uninstall install-bytecode \
+                    unitcheck
+LocalTargets     := all-local clean-local clean-all-local check-local \
+                    install-local printvars uninstall-local \
+		    install-bytecode-local
+TopLevelTargets  := check dist dist-check dist-clean dist-gzip dist-bzip2 \
+                    dist-zip unittests
+UserTargets      := $(RecursiveTargets) $(LocalTargets) $(TopLevelTargets)
+InternalTargets  := preconditions distdir dist-hook
+
+################################################################################
+# INITIALIZATION: Basic things the makefile needs
+################################################################################
+
+#--------------------------------------------------------------------
+# Set the VPATH so that we can find source files.
+#--------------------------------------------------------------------
+VPATH=$(PROJ_SRC_DIR)
+
+#--------------------------------------------------------------------
+# Reset the list of suffixes we know how to build.
+#--------------------------------------------------------------------
+.SUFFIXES:
+.SUFFIXES: .c .cpp .cc .h .hpp .o .a .bc .td .ps .dot .ll .m .mm
+.SUFFIXES: $(SHLIBEXT) $(SUFFIXES)
+
+#--------------------------------------------------------------------
+# Mark all of these targets as phony to avoid implicit rule search
+#--------------------------------------------------------------------
+.PHONY: $(UserTargets) $(InternalTargets)
+
+#--------------------------------------------------------------------
+# Make sure all the user-target rules are double colon rules and
+# they are defined first.
+#--------------------------------------------------------------------
+
+$(UserTargets)::
+
+################################################################################
+# PRECONDITIONS: that which must be built/checked first
+################################################################################
+
+SrcMakefiles       := $(filter %Makefile %Makefile.tests,\
+                      $(wildcard $(PROJ_SRC_DIR)/Makefile*))
+ObjMakefiles       := $(subst $(PROJ_SRC_DIR),$(PROJ_OBJ_DIR),$(SrcMakefiles))
+ConfigureScript    := $(PROJ_SRC_ROOT)/configure
+ConfigStatusScript := $(PROJ_OBJ_ROOT)/config.status
+MakefileConfigIn   := $(strip $(wildcard $(PROJ_SRC_ROOT)/Makefile.config.in))
+MakefileCommonIn   := $(strip $(wildcard $(PROJ_SRC_ROOT)/Makefile.common.in))
+MakefileConfig     := $(PROJ_OBJ_ROOT)/Makefile.config
+MakefileCommon     := $(PROJ_OBJ_ROOT)/Makefile.common
+PreConditions      := $(ConfigStatusScript) $(ObjMakefiles)
+ifneq ($(MakefileCommonIn),)
+PreConditions      += $(MakefileCommon)
+endif
+
+ifneq ($(MakefileConfigIn),)
+PreConditions      += $(MakefileConfig)
+endif
+
+preconditions: $(PreConditions)
+
+#------------------------------------------------------------------------
+# Make sure the BUILT_SOURCES are built first
+#------------------------------------------------------------------------
+$(filter-out clean clean-local,$(UserTargets)):: $(BUILT_SOURCES)
+
+clean-all-local::
+ifneq ($(strip $(BUILT_SOURCES)),)
+	-$(Verb) $(RM) -f $(BUILT_SOURCES)
+endif
+
+ifneq ($(PROJ_OBJ_ROOT),$(PROJ_SRC_ROOT))
+spotless:
+	$(Verb) if test -x config.status ; then \
+	  $(EchoCmd) Wiping out $(PROJ_OBJ_ROOT) ; \
+	  $(MKDIR) .spotless.save ; \
+	  $(MV) config.status .spotless.save ; \
+	  $(MV) mklib  .spotless.save ; \
+	  $(MV) projects  .spotless.save ; \
+	  $(RM) -rf * ; \
+	  $(MV) .spotless.save/config.status . ; \
+	  $(MV) .spotless.save/mklib . ; \
+	  $(MV) .spotless.save/projects . ; \
+	  $(RM) -rf .spotless.save ; \
+	  $(EchoCmd) Rebuilding configuration of $(PROJ_OBJ_ROOT) ; \
+	  $(ConfigStatusScript) --recheck $(ConfigureScriptFLAGS) && \
+	  $(ConfigStatusScript) ; \
+	else \
+	  $(EchoCmd) "make spotless" can only be run from $(PROJ_OBJ_ROOT); \
+	fi
+else
+spotless:
+	$(EchoCmd) "spotless target not supported for objdir == srcdir"
+endif
+
+$(BUILT_SOURCES) : $(ObjMakefiles)
+
+#------------------------------------------------------------------------
+# Make sure we're not using a stale configuration
+#------------------------------------------------------------------------
+reconfigure:
+	$(Echo) Reconfiguring $(PROJ_OBJ_ROOT)
+	$(Verb) cd $(PROJ_OBJ_ROOT) && \
+	  $(ConfigStatusScript) --recheck $(ConfigureScriptFLAGS) && \
+	  $(ConfigStatusScript)
+
+.PRECIOUS: $(ConfigStatusScript)
+$(ConfigStatusScript): $(ConfigureScript)
+	$(Echo) Reconfiguring with $<
+	$(Verb) cd $(PROJ_OBJ_ROOT) && \
+	  $(ConfigStatusScript) --recheck $(ConfigureScriptFLAGS) && \
+	  $(ConfigStatusScript)
+
+#------------------------------------------------------------------------
+# Make sure the configuration makefile is up to date
+#------------------------------------------------------------------------
+ifneq ($(MakefileConfigIn),)
+$(MakefileConfig): $(MakefileConfigIn) $(ConfigStatusScript)
+	$(Echo) Regenerating $@
+	$(Verb) cd $(PROJ_OBJ_ROOT) ; $(ConfigStatusScript) Makefile.config
+endif
+
+ifneq ($(MakefileCommonIn),)
+$(MakefileCommon): $(MakefileCommonIn) $(ConfigStatusScript)
+	$(Echo) Regenerating $@
+	$(Verb) cd $(PROJ_OBJ_ROOT) ; $(ConfigStatusScript) Makefile.common
+endif
+
+#------------------------------------------------------------------------
+# If the Makefile in the source tree has been updated, copy it over into the
+# build tree. But, only do this if the source and object makefiles differ
+#------------------------------------------------------------------------
+ifndef PROJ_MAKEFILE
+PROJ_MAKEFILE := $(PROJ_SRC_DIR)/Makefile
+endif
+
+ifneq ($(PROJ_OBJ_DIR),$(PROJ_SRC_DIR))
+
+Makefile: $(PROJ_MAKEFILE) $(ExtraMakefiles)
+	$(Echo) "Updating Makefile"
+	$(Verb) $(MKDIR) $(@D)
+	$(Verb) $(CP) -f $< $@
+
+# Copy the Makefile.* files unless we're in the root directory which avoids
+# the copying of Makefile.config.in or other things that should be explicitly
+# taken care of.
+$(PROJ_OBJ_DIR)/Makefile% : $(PROJ_MAKEFILE)%
+	@case '$?' in \
+          *Makefile.rules) ;; \
+          *.in) ;; \
+          *) $(EchoCmd) "Updating $(@F)" ; \
+	     $(MKDIR) $(@D) ; \
+	     $(CP) -f $< $@ ;; \
+	esac
+
+endif
+
+#------------------------------------------------------------------------
+# Set up the basic dependencies
+#------------------------------------------------------------------------
+$(UserTargets):: $(PreConditions)
+
+all:: all-local
+clean:: clean-local
+clean-all:: clean-local clean-all-local
+install:: install-local
+uninstall:: uninstall-local
+install-local:: all-local
+install-bytecode:: install-bytecode-local
+
+###############################################################################
+# VARIABLES: Set up various variables based on configuration data
+###############################################################################
+
+# Variable for if this make is for a "cleaning" target
+ifneq ($(strip $(filter clean clean-local dist-clean,$(MAKECMDGOALS))),)
+  IS_CLEANING_TARGET=1
+endif
+
+#--------------------------------------------------------------------
+# Variables derived from configuration we are building
+#--------------------------------------------------------------------
+
+CPP.Defines :=
+ifeq ($(ENABLE_OPTIMIZED),1)
+  BuildMode := Release
+  # Don't use -fomit-frame-pointer on Darwin or FreeBSD.
+  ifneq ($(HOST_OS),FreeBSD)
+  ifneq ($(HOST_OS),Darwin)
+    OmitFramePointer := -fomit-frame-pointer
+  endif
+  endif
+
+  # Darwin requires -fstrict-aliasing to be explicitly enabled.
+  # Avoid -fstrict-aliasing on Darwin for now, there are unresolved issues
+  # with -fstrict-aliasing and ipa-type-escape radr://6756684
+  #ifeq ($(HOST_OS),Darwin)
+  #  EXTRA_OPTIONS += -fstrict-aliasing -Wstrict-aliasing
+  #endif
+  CXX.Flags += $(OPTIMIZE_OPTION) $(OmitFramePointer)
+  C.Flags   += $(OPTIMIZE_OPTION) $(OmitFramePointer)
+  LD.Flags  += $(OPTIMIZE_OPTION)
+  ifdef DEBUG_SYMBOLS
+    BuildMode := $(BuildMode)+Debug
+    CXX.Flags += -g
+    C.Flags   += -g
+    LD.Flags  += -g
+    KEEP_SYMBOLS := 1
+  endif
+else
+  ifdef NO_DEBUG_SYMBOLS
+    BuildMode := Unoptimized
+    CXX.Flags +=
+    C.Flags   +=
+    LD.Flags  +=
+    KEEP_SYMBOLS := 1
+  else
+    BuildMode := Debug
+    CXX.Flags += -g
+    C.Flags   += -g
+    LD.Flags  += -g
+    KEEP_SYMBOLS := 1
+  endif
+endif
+
+ifeq ($(ENABLE_PROFILING),1)
+  BuildMode := $(BuildMode)+Profile
+  CXX.Flags := $(filter-out -fomit-frame-pointer,$(CXX.Flags)) -pg -g
+  C.Flags   := $(filter-out -fomit-frame-pointer,$(C.Flags)) -pg -g
+  LD.Flags  := $(filter-out -fomit-frame-pointer,$(LD.Flags)) -pg -g
+  KEEP_SYMBOLS := 1
+endif
+
+#ifeq ($(ENABLE_VISIBILITY_INLINES_HIDDEN),1)
+#    CXX.Flags += -fvisibility-inlines-hidden
+#endif
+
+ifdef ENABLE_EXPENSIVE_CHECKS
+  # GNU libstdc++ uses RTTI if you define _GLIBCXX_DEBUG, which we did above.
+  # See http://gcc.gnu.org/bugzilla/show_bug.cgi?id=40160
+  REQUIRES_RTTI := 1
+endif
+
+# IF REQUIRES_EH=1 is specified then don't disable exceptions
+ifndef REQUIRES_EH
+  CXX.Flags += -fno-exceptions
+else
+  # If the library requires EH, it also requires RTTI.
+  REQUIRES_RTTI := 1
+endif
+
+ifdef REQUIRES_FRAME_POINTER
+  CXX.Flags := $(filter-out -fomit-frame-pointer,$(CXX.Flags))
+  C.Flags   := $(filter-out -fomit-frame-pointer,$(C.Flags))
+  LD.Flags  := $(filter-out -fomit-frame-pointer,$(LD.Flags))
+endif
+
+# If REQUIRES_RTTI=1 is specified then don't disable run-time type id.
+ifneq ($(REQUIRES_RTTI), 1)
+  CXX.Flags += -fno-rtti
+endif
+
+ifeq ($(ENABLE_COVERAGE),1)
+  BuildMode := $(BuildMode)+Coverage
+  CXX.Flags += -ftest-coverage -fprofile-arcs
+  C.Flags   += -ftest-coverage -fprofile-arcs
+endif
+
+# If DISABLE_ASSERTIONS=1 is specified (make command line or configured),
+# then disable assertions by defining the appropriate preprocessor symbols.
+ifeq ($(DISABLE_ASSERTIONS),1)
+  CPP.Defines += -DNDEBUG
+else
+  BuildMode := $(BuildMode)+Asserts
+  CPP.Defines += -D_DEBUG
+endif
+
+# If ENABLE_EXPENSIVE_CHECKS=1 is specified (make command line or
+# configured), then enable expensive checks by defining the
+# appropriate preprocessor symbols.
+ifeq ($(ENABLE_EXPENSIVE_CHECKS),1)
+  BuildMode := $(BuildMode)+Checks
+  CPP.Defines += -D_GLIBCXX_DEBUG -DXDEBUG
+endif
+
+# LOADABLE_MODULE implies several other things so we force them to be
+# defined/on.
+ifdef LOADABLE_MODULE
+  SHARED_LIBRARY := 1
+  LINK_LIBS_IN_SHARED := 1
+endif
+
+ifdef SHARED_LIBRARY
+  ENABLE_PIC := 1
+  PIC_FLAG = "(PIC)"
+endif
+
+ifeq ($(ENABLE_PIC),1)
+  ifeq ($(HOST_OS), $(filter $(HOST_OS), Cygwin MingW))
+    # Nothing. Win32 defaults to PIC and warns when given -fPIC
+  else
+    ifeq ($(HOST_OS),Darwin)
+      # Common symbols not allowed in dylib files
+      CXX.Flags += -fno-common
+      C.Flags   += -fno-common
+    else
+      # Linux and others; pass -fPIC
+      CXX.Flags += -fPIC
+      C.Flags   += -fPIC
+    endif
+  endif
+else
+  ifeq ($(HOST_OS),Darwin)
+      CXX.Flags += -mdynamic-no-pic
+      C.Flags   += -mdynamic-no-pic
+  endif
+endif
+
+# Support makefile variable to disable any kind of timestamp/non-deterministic
+# info from being used in the build.
+ifeq ($(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
+  ifeq ($(LLVM_CROSS_COMPILING),1)
+    # Work around http://bugs.debian.org/cgi-bin/bugreport.cgi?bug=525016
+    ifdef TOOLNAME
+      LD.Flags += -Wl,--allow-multiple-definition
+    endif
+  endif
+endif
+
+CXX.Flags     += -Woverloaded-virtual
+CPP.BaseFlags += $(CPP.Defines)
+AR.Flags      := cru
+
+# Make Floating point IEEE compliant on Alpha.
+ifeq ($(ARCH),Alpha)
+  CXX.Flags     += -mieee
+  CPP.BaseFlags += -mieee
+ifeq ($(ENABLE_PIC),0)
+  CXX.Flags     += -fPIC
+  CPP.BaseFlags += -fPIC
+endif
+
+  LD.Flags += -Wl,--no-relax
+endif
+
+# GNU ld/PECOFF accepts but ignores them below;
+#   --version-script
+#   --export-dynamic
+#   --rpath
+# FIXME: autoconf should be aware of them.
+ifneq (,$(filter $(HOST_OS),Cygwin MingW))
+  HAVE_LINK_VERSION_SCRIPT := 0
+  RPATH :=
+  RDYNAMIC := -Wl,--export-all-symbols
+endif
+
+#--------------------------------------------------------------------
+# Directory locations
+#--------------------------------------------------------------------
+TargetMode :=
+ifeq ($(LLVM_CROSS_COMPILING),1)
+  BuildLLVMToolDir := $(LLVM_OBJ_ROOT)/BuildTools/$(BuildMode)/bin
+endif
+
+ObjRootDir  := $(PROJ_OBJ_DIR)/$(BuildMode)
+ObjDir      := $(ObjRootDir)
+LibDir      := $(PROJ_OBJ_ROOT)/$(BuildMode)/lib
+ToolDir     := $(PROJ_OBJ_ROOT)/$(BuildMode)/bin
+ExmplDir    := $(PROJ_OBJ_ROOT)/$(BuildMode)/examples
+LLVMLibDir  := $(LLVM_OBJ_ROOT)/$(BuildMode)/lib
+LLVMToolDir := $(LLVM_OBJ_ROOT)/$(BuildMode)/bin
+LLVMExmplDir:= $(LLVM_OBJ_ROOT)/$(BuildMode)/examples
+
+#--------------------------------------------------------------------
+# Locations of shared libraries
+#--------------------------------------------------------------------
+
+SharedPrefix     := lib
+SharedLibDir     := $(LibDir)
+LLVMSharedLibDir := $(LLVMLibDir)
+
+# Win32.DLL prefers to be located on the "PATH" of binaries.
+ifeq ($(HOST_OS), $(filter $(HOST_OS), Cygwin MingW))
+  SharedLibDir     := $(ToolDir)
+  LLVMSharedLibDir := $(LLVMToolDir)
+
+  ifeq ($(HOST_OS),Cygwin)
+    SharedPrefix  := cyg
+  else
+    SharedPrefix  :=
+  endif
+endif
+
+#--------------------------------------------------------------------
+# LLVM Capable Compiler
+#--------------------------------------------------------------------
+
+ifneq ($(findstring llvm-gcc,$(LLVMCC_OPTION)),)
+  LLVMCC := $(LLVMGCC)
+  LLVMCXX := $(LLVMGXX)
+else
+  ifneq ($(findstring clang,$(LLVMCC_OPTION)),)
+    ifneq ($(CLANGPATH),)
+      LLVMCC := $(CLANGPATH)
+      LLVMCXX := $(CLANGXXPATH)
+    else
+      ifeq ($(ENABLE_BUILT_CLANG),1)
+        LLVMCC := $(LLVMToolDir)/clang
+        LLVMCXX := $(LLVMToolDir)/clang++
+      endif
+    endif
+  endif
+endif
+
+#--------------------------------------------------------------------
+# Full Paths To Compiled Tools and Utilities
+#--------------------------------------------------------------------
+EchoCmd  = $(ECHO) llvm[$(MAKELEVEL)]:
+Echo     = @$(EchoCmd)
+ifndef LLVMAS
+LLVMAS   := $(LLVMToolDir)/llvm-as$(EXEEXT)
+endif
+