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#===-- Makefile.common - Common make rules for LLVM -------*- makefile -*--====
#
# This file is included by all of the LLVM makefiles.  This file defines common
# rules to do things like compile a .cpp file or generate dependancy info.
# These are platform dependant, so this is the file used to specify these
# system dependant operations.
#
# The following functionality can be set by setting incoming variables.
# The variable $(LEVEL) *must* be set:
#
# 1. LEVEL - The level of the current subdirectory from the top of the 
#    MagicStats view.  This level should be expressed as a path, for 
#    example, ../.. for two levels deep.
#
# 2. DIRS - A list of subdirectories to be built.  Fake targets are set up
#    so that each of the targets "all", "install", and "clean" each build
#    the subdirectories before the local target.  DIRS are guaranteed to be
#    built in order.
#
# 3. PARALLEL_DIRS - A list of subdirectories to be built, but that may be
#    built in any order.  All DIRS are built in order before PARALLEL_DIRS are
#    built, which are then built in any order.
#
# 4. Source - If specified, this sets the source code filenames.  If this
#    is not set, it defaults to be all of the .cpp, .c, .y, and .l files 
#    in the current directory.  Also, if you want to build files in addition
#    to the local files, you can use the ExtraSource variable
#
#===-----------------------------------------------------------------------====

# Configuration file to set paths specific to local installation of LLVM
# 
include $(LEVEL)/Makefile.config

# 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_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_PURIFY is enabled, the LLVM tools are linked with purify (which
# must be locally installed) to allow for some automated memory error debugging.
#
#ENABLE_PURIFY    = 1

# When ENABLE_OPTIMIZED is enabled, Release builds of all of the LLVM code are
# turned on, and Debug builds are turned off.
#
#ENABLE_OPTIMIZED = 1


# 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 $(LEVEL)/Makefile.$(UNAME)

ifdef SHARED_LIBRARY
# if SHARED_LIBRARY is specified, the default is to build the dynamic lib
dynamic ::
endif

# Default Rule:  Make sure it's also a :: rule
all ::

# Default for install is to at least build everything...
install ::


# Figure out which directory to build stuff into.  We want to build into the
# /shared directory by default because it is guaranteed to be local to the
# current machine.
#
ifeq ($(LLVM_OBJ_DIR),.)
BUILD_ROOT     = $(LLVM_OBJ_DIR)
BUILD_ROOT_TOP = $(LEVEL)
else

BUILD_ROOT := $(LLVM_OBJ_DIR)$(patsubst $(HOME)%,%,$(shell pwd))

# Calculate the BUILD_ROOT_TOP variable, which is the top of the llvm/ tree.
# Note that although this is just equal to $(BUILD_ROOT)/$(LEVEL), we cannot use
# this expression because some of the directories on the source tree may not
# exist in the build tree (for example the test/ heirarchy).  Thus we evaluate
# the directory to eliminate the ../'s
#
TOP_DIRECTORY := $(shell cd $(LEVEL); pwd)
BUILD_ROOT_TOP := $(LLVM_OBJ_DIR)$(patsubst $(HOME)%,%,$(TOP_DIRECTORY))
endif

#--------------------------------------------------------------------
# Variables derived from configuration options... 
#--------------------------------------------------------------------

#BinInstDir=/usr/local/bin
#LibInstDir=/usrl/local/lib/xxx
#DocInstDir=/usr/doc/xxx

BURG_OPTS = -I

PURIFY := $(PURIFY) -cache-dir="$(BUILD_ROOT_TOP)/../purifycache" -chain-length="30" -messages=all 

ifdef ENABLE_PROFILING
  ENABLE_OPTIMIZED = 1
  CONFIGURATION := Profile
else
  ifdef ENABLE_OPTIMIZED
    CONFIGURATION := Release
  else
    CONFIGURATION := Debug
  endif
endif

# Shorthand for commonly accessed directories
LIBDEBUG    := $(BUILD_ROOT_TOP)/lib/Debug
LIBRELEASE  := $(BUILD_ROOT_TOP)/lib/Release
LIBPROFILE  := $(BUILD_ROOT_TOP)/lib/Profile
LIBCURRENT  := $(BUILD_ROOT_TOP)/lib/$(CONFIGURATION)

TOOLDEBUG   := $(BUILD_ROOT_TOP)/tools/Debug
TOOLRELEASE := $(BUILD_ROOT_TOP)/tools/Release
TOOLPROFILE := $(BUILD_ROOT_TOP)/tools/Profile
TOOLCURRENT := $(BUILD_ROOT_TOP)/tools/$(CONFIGURATION)

# Verbosity levels
ifndef VERBOSE
VERB := @
endif

#---------------------------------------------------------
# Compilation options...
#---------------------------------------------------------

# Special tools used while building the LLVM tree.  Burg is built as part of the
# utils directory.
#
BURG    := $(TOOLCURRENT)/burg
RunBurg := $(BURG) $(BURG_OPTS)


# Enable this for profiling support with 'gprof'
# This automatically enables optimized builds.
ifdef ENABLE_PROFILING
  PROFILE = -pg
endif

# By default, strip symbol information from executable
ifndef KEEP_SYMBOLS
STRIP = $(PLATFORMSTRIPOPTS)
STRIP_WARN_MSG = "(without symbols) "
endif

# Allow gnu extensions...
CPPFLAGS += -D_GNU_SOURCE

# -Wno-unused-parameter
CompileCommonOpts := -Wall -W  -Wwrite-strings -Wno-unused -I$(LEVEL)/include
CompileOptimizeOpts := -O3 -DNDEBUG -finline-functions -fshort-enums

# Compile a cpp file, don't link...
Compile  := $(CXX) -c $(CPPFLAGS) $(CXXFLAGS) $(CompileCommonOpts)
CompileG := $(Compile) -g  -D_DEBUG
CompileO := $(Compile) $(CompileOptimizeOpts) -felide-constructors -fomit-frame-pointer
CompileP := $(Compile) $(CompileOptimizeOpts) -felide-constructors $(PROFILE)

# Compile a c file, don't link...
CompileC  := $(CC) -c $(CPPFLAGS) $(CCFLAGS) $(CompileCommonOpts)
CompileCG := $(CompileC) -g  -D_DEBUG
CompileCO := $(CompileC) $(CompileOptimizeOpts) -fomit-frame-pointer
CompileCP := $(CompileC) $(CompileOptimizeOpts) $(PROFILE)


# Link final executable

ifdef ENABLE_PURIFY # To enable purify, build with 'gmake ENABLE_PURIFY=1'
Link     := $(PURIFY) $(CXX) -static
else
Link     := $(CXX)
endif
LinkG    := $(Link) -g  -L$(LIBDEBUG) $(STRIP)
LinkO    := $(Link) -O3 -L$(LIBRELEASE)
LinkP    := $(Link) -O3 -L$(LIBPROFILE) $(PROFILE)

# Create one .o file from a bunch of .o files...
Relink = ld -r

# MakeSO - Create a .so file from a .o files...
MakeSO   := $(CXX) $(MakeSharedObjectOption)
MakeSOO  := $(MakeSO) -O3
MakeSOP  := $(MakeSOO) $(PROFILE)

# Create dependancy file from CPP file, send to stdout.
Depend   := $(CXX) -MM -I$(LEVEL)/include $(CPPFLAGS) 
DependC  := $(CC)  -MM -I$(LEVEL)/include $(CPPFLAGS) 

# Archive a bunch of .o files into a .a file...
AR       = ar cq 
BISON    = bison

#----------------------------------------------------------

# Source includes all of the cpp files, and objects are derived from the
# source files...
# The local Makefile can list other Source files via ExtraSource = ...
# 
ifndef Source
Source  := $(ExtraSource) $(wildcard *.cpp *.c *.y *.l)
endif

Objs := $(sort $(patsubst Debug/%.o, %.o, $(addsuffix .o,$(basename $(Source)))))
ObjectsO := $(addprefix $(BUILD_ROOT)/Release/,$(Objs))
ObjectsP := $(addprefix $(BUILD_ROOT)/Profile/,$(Objs))
ObjectsG := $(addprefix $(BUILD_ROOT)/Debug/,$(Objs))


#---------------------------------------------------------
# Handle the DIRS and PARALLEL_DIRS options
#---------------------------------------------------------

ifdef DIRS
all install clean test ::
	$(VERB) for dir in ${DIRS}; do \
		(cd $$dir; $(MAKE) $@) || exit 1; \
	done
endif

# Handle PARALLEL_DIRS
ifdef PARALLEL_DIRS
all     :: $(addsuffix /.makeall    , $(PARALLEL_DIRS))
install :: $(addsuffix /.makeinstall, $(PARALLEL_DIRS))
clean   :: $(addsuffix /.makeclean  , $(PARALLEL_DIRS))
test    :: $(addsuffix /.maketest   , $(PARALLEL_DIRS))

%/.makeall %/.makeinstall %/.makeclean %/.maketest:
	$(VERB) cd $(@D); $(MAKE) $(subst $(@D)/.make,,$@)
endif

#---------------------------------------------------------
# Handle the LIBRARYNAME option - used when building libs...
#---------------------------------------------------------
#
#  When libraries are built, they are allowed to optionally define the
#  DONT_BUILD_RELINKED make variable, which, when defined, prevents a .o file
#  from being built for the library. This .o files may then be linked to by a
#  tool if the tool does not need (or want) the semantics a .a file provides
#  (linking in only object files that are "needed").  If a library is never to
#  be used in this way, it is better to define DONT_BUILD_RELINKED, and define
#  BUILD_ARCHIVE instead.
#
#  Some libraries must be built as .a files (libscalar for example) because if
#  it's built as a .o file, then all of the constituent .o files in it will be
#  linked into tools (for example gccas) even if they only use one of the parts
#  of it.  For this reason, sometimes it's useful to use libraries as .a files.

ifdef LIBRARYNAME

# Make sure there isn't any extranous whitespace on the LIBRARYNAME option
LIBRARYNAME := $(strip $(LIBRARYNAME))

LIBNAME_O    := $(LIBRELEASE)/lib$(LIBRARYNAME).so
LIBNAME_P    := $(LIBPROFILE)/lib$(LIBRARYNAME).so
LIBNAME_G    := $(LIBDEBUG)/lib$(LIBRARYNAME).so
LIBNAME_AO   := $(LIBRELEASE)/lib$(LIBRARYNAME).a
LIBNAME_AP   := $(LIBPROFILE)/lib$(LIBRARYNAME).a
LIBNAME_AG   := $(LIBDEBUG)/lib$(LIBRARYNAME).a
LIBNAME_OBJO := $(LIBRELEASE)/$(LIBRARYNAME).o
LIBNAME_OBJP := $(LIBPROFILE)/$(LIBRARYNAME).o
LIBNAME_OBJG := $(LIBDEBUG)/$(LIBRARYNAME).o

# dynamic target builds a shared object version of the library...
dynamic:: $(LIBCURRENT)/lib$(LIBRARYNAME).so

# Does the library want a .o version built?
ifndef DONT_BUILD_RELINKED
all:: $(LIBCURRENT)/$(LIBRARYNAME).o
endif

# Does the library want an archive version built?
ifdef BUILD_ARCHIVE
all:: $(LIBCURRENT)/lib$(LIBRARYNAME).a
endif

$(LIBNAME_O): $(ObjectsO) $(LibSubDirs) $(LIBRELEASE)/.dir
	@echo ======= Linking $(LIBRARYNAME) release library =======
	$(VERB) $(MakeSOO) -o $@ $(ObjectsO) $(LibSubDirs) $(LibLinkOpts)

$(LIBNAME_P): $(ObjectsP) $(LibSubDirs) $(LIBPROFILE)/.dir
	@echo ======= Linking $(LIBRARYNAME) profile library =======
	$(VERB) $(MakeSOP) -o $@ $(ObjectsP) $(LibSubDirs) $(LibLinkOpts)

$(LIBNAME_G): $(ObjectsG) $(LibSubDirs) $(LIBDEBUG)/.dir
	@echo ======= Linking $(LIBRARYNAME) debug library =======
	$(VERB) $(MakeSO) -g -o $@ $(ObjectsG) $(LibSubDirs) $(LibLinkOpts)

$(LIBNAME_AO): $(ObjectsO) $(LibSubDirs) $(LIBRELEASE)/.dir
	@echo ======= Linking $(LIBRARYNAME) release library =======
	@rm -f $@
	$(VERB) $(AR) $@ $(ObjectsO) $(LibSubDirs)

$(LIBNAME_AP): $(ObjectsP) $(LibSubDirs) $(LIBPROFILE)/.dir
	@echo ======= Linking $(LIBRARYNAME) profile library =======
	@rm -f $@
	$(VERB) $(AR) $@ $(ObjectsP) $(LibSubDirs)

$(LIBNAME_AG): $(ObjectsG) $(LibSubDirs) $(LIBDEBUG)/.dir
	@echo ======= Linking $(LIBRARYNAME) debug library =======
	@rm -f $@
	$(VERB) $(AR) $@ $(ObjectsG) $(LibSubDirs)

$(LIBNAME_OBJO): $(ObjectsO) $(LibSubDirs) $(LIBRELEASE)/.dir
	@echo "Linking $@"
	$(VERB) $(Relink) -o $@ $(ObjectsO) $(LibSubDirs)

$(LIBNAME_OBJP): $(ObjectsP) $(LibSubDirs) $(LIBPROFILE)/.dir
	@echo "Linking $@"
	$(VERB) $(Relink) -o $@ $(ObjectsP) $(LibSubDirs)

$(LIBNAME_OBJG): $(ObjectsG) $(LibSubDirs) $(LIBDEBUG)/.dir
	@echo "Linking $@"
	$(VERB) $(Relink) -o $@ $(ObjectsG) $(LibSubDirs)

endif

#------------------------------------------------------------------------
# Create a TAGS database for emacs
#------------------------------------------------------------------------

ifeq ($(LEVEL), .)
tags:
	etags -l c++ `find include lib tools -name '*.cpp' -o -name '*.h'`
all:: tags
endif

#------------------------------------------------------------------------
# Handle the TOOLNAME option - used when building tool executables...
#------------------------------------------------------------------------
#
# The TOOLNAME option should be used with a USEDLIBS variable that tells the
# libraries (and the order of the libs) that should be linked to the
# tool. USEDLIBS should contain a list of library names (some with .a extension)
# that are automatically linked in as .o files unless the .a suffix is added.
#
ifdef TOOLNAME

# TOOLEXENAME* - These compute the output filenames to generate...
TOOLEXENAME_G := $(BUILD_ROOT_TOP)/tools/Debug/$(TOOLNAME)
TOOLEXENAME_O := $(BUILD_ROOT_TOP)/tools/Release/$(TOOLNAME)
TOOLEXENAME_P := $(BUILD_ROOT_TOP)/tools/Profile/$(TOOLNAME)
TOOLEXENAMES  := $(BUILD_ROOT_TOP)/tools/$(CONFIGURATION)/$(TOOLNAME)

# USED_LIBS_OPTIONS - Compute the options line that add -llib1 -llib2, etc.
USED_LIBS_OPTIONS   := $(patsubst %.a.o, -l%, $(addsuffix .o, $(USEDLIBS)))
USED_LIBS_OPTIONS_G := $(patsubst %.o, $(LIBDEBUG)/%.o,  $(USED_LIBS_OPTIONS))
USED_LIBS_OPTIONS_O := $(patsubst %.o, $(LIBRELEASE)/%.o,$(USED_LIBS_OPTIONS))
USED_LIBS_OPTIONS_P := $(patsubst %.o, $(LIBPROFILE)/%.o,$(USED_LIBS_OPTIONS))


# USED_LIB_PATHS - Compute the path of the libraries used so that tools are
# rebuilt if libraries change.  This has to make sure to handle .a/.so and .o
# files seperately.
#
STATICUSEDLIBS   := $(patsubst %.a.o, lib%.a, $(addsuffix .o, $(USEDLIBS)))
USED_LIB_PATHS_G := $(addprefix $(LIBDEBUG)/, $(STATICUSEDLIBS))
USED_LIB_PATHS_O := $(addprefix $(LIBRELEASE)/, $(STATICUSEDLIBS))
USED_LIB_PATHS_P := $(addprefix $(LIBPROFILE)/, $(STATICUSEDLIBS))
LINK_OPTS        := $(TOOLLINKOPTS) $(PLATFORMLINKOPTS)


# Tell make that we need to rebuild subdirectories before we can link the tool.
# This affects things like LLI which has library subdirectories.
$(USED_LIB_PATHS_G) $(USED_LIB_PATHS_O) $(USED_LIB_PATHS_P): \
        $(addsuffix /.makeall, $(PARALLEL_DIRS))

all::   $(TOOLEXENAMES)
clean::
	$(VERB) rm -f $(TOOLEXENAMES)

$(TOOLEXENAME_G): $(ObjectsG) $(USED_LIB_PATHS_G) $(TOOLDEBUG)/.dir
	@echo ======= Linking $(TOOLNAME) debug executable $(STRIP_WARN_MSG) =======
	$(VERB) $(LinkG) -o $@ $(ObjectsG) $(USED_LIBS_OPTIONS_G) $(LINK_OPTS)

$(TOOLEXENAME_O): $(ObjectsO) $(USED_LIB_PATHS_O) $(TOOLRELEASE)/.dir
	@echo ======= Linking $(TOOLNAME) release executable =======
	$(VERB) $(LinkO) -o $@ $(ObjectsO) $(USED_LIBS_OPTIONS_O) $(LINK_OPTS)

$(TOOLEXENAME_P): $(ObjectsP) $(USED_LIB_PATHS_P) $(TOOLPROFILE)/.dir
	@echo ======= Linking $(TOOLNAME) profile executable =======
	$(VERB) $(LinkP) -o $@ $(ObjectsP) $(USED_LIBS_OPTIONS_P) $(LINK_OPTS)

endif



#---------------------------------------------------------
.PRECIOUS: $(BUILD_ROOT)/Depend/.dir
.PRECIOUS: $(BUILD_ROOT)/Debug/.dir $(BUILD_ROOT)/Release/.dir

# Create dependencies for the *.cpp files...
$(BUILD_ROOT)/Depend/%.d: %.cpp $(BUILD_ROOT)/Depend/.dir
	$(VERB) $(Depend) $< | sed 's|$*\.o *|$(BUILD_ROOT)/Release/& $(BUILD_ROOT)/Profile/& $(BUILD_ROOT)/Debug/& $(BUILD_ROOT)/Depend/$(@F)|g' > $@

# Create dependencies for the *.c files...
$(BUILD_ROOT)/Depend/%.d: %.c $(BUILD_ROOT)/Depend/.dir
	$(VERB) $(DependC) $< | sed 's|$*\.o *|Release/& Profile/& Debug/& Depend/$(@F)|g' > $@

# Create .o files in the ObjectFiles directory from the .cpp and .c files...
$(BUILD_ROOT)/Release/%.o: %.cpp $(BUILD_ROOT)/Release/.dir
	@echo "Compiling $<"
	$(VERB) $(CompileO) $< -o $@

$(BUILD_ROOT)/Release/%.o: %.c $(BUILD_ROOT)/Release/.dir
	$(VERB) $(CompileCO) $< -o $@

$(BUILD_ROOT)/Profile/%.o: %.cpp $(BUILD_ROOT)/Profile/.dir
	@echo "Compiling $<"
	$(VERB) $(CompileP) $< -o $@

$(BUILD_ROOT)/Profile/%.o: %.c $(BUILD_ROOT)/Profile/.dir
	@echo "Compiling $<"
	$(VERB) $(CompileCP) $< -o $@

$(BUILD_ROOT)/Debug/%.o: %.cpp $(BUILD_ROOT)/Debug/.dir
	@echo "Compiling $<"
	$(VERB) $(CompileG) $< -o $@

$(BUILD_ROOT)/Debug/%.o: %.c $(BUILD_ROOT)/Debug/.dir 
	$(VERB) $(CompileCG) $< -o $@

#
# Rules for building lex/yacc files
#
LEX_FILES   = $(filter %.l, $(Source))
LEX_OUTPUT  = $(LEX_FILES:%.l=%.cpp)
YACC_FILES  = $(filter %.y, $(Source))
YACC_OUTPUT = $(addprefix $(YACC_FILES:%.y=%), .h .cpp .output)
.PRECIOUS: $(LEX_OUTPUT) $(YACC_OUTPUT)

# Create a .cpp source file from a flex input file... this uses sed to cut down
# on the warnings emited by GCC...
#
# The last line is a gross hack to work around flex aparently not being able to
# resize the buffer on a large token input.  Currently, for uninitialized string
# buffers in LLVM we can generate very long tokens, so this is a hack around it.
# FIXME.  (f.e. char Buffer[10000]; )
#
%.cpp: %.l
	flex -t $< | sed '/^find_rule/d' | \
                     sed 's/void yyunput/inline void yyunput/' | \
          sed 's/void \*yy_flex_realloc/inline void *yy_flex_realloc/' | \
          sed 's/#define YY_BUF_SIZE 16384/#define YY_BUF_SIZE (16384*64)/' > $@

# Rule for building the bison parsers...

%.cpp %.h : %.y
	$(VERB) $(BISON) -v -d -p $(<:%Parser.y=%) $*.y
	$(VERB) mv -f $*.tab.c $*.cpp
	$(VERB) mv -f $*.tab.h $*.h

# To create the directories...
%/.dir:
	$(VERB) mkdir -p $*
	@date > $@

# To create postscript files from dot files...
%.ps: %.dot
	dot -Tps < $< > $@

# 'make clean' nukes the tree
clean::
	$(VERB) rm -rf $(BUILD_ROOT)/Debug $(BUILD_ROOT)/Release $(BUILD_ROOT)/Profile $(BUILD_ROOT)/Depend
	$(VERB) rm -f core core.[0-9][0-9]* *.o *.d *.so *~ *.flc
	$(VERB) rm -f $(LEX_OUTPUT) $(YACC_OUTPUT)

# If dependancies were generated for the file that included this file,
# include the dependancies now...
#
SourceDepend := $(addsuffix .d,$(addprefix $(BUILD_ROOT)/Depend/,$(basename $(filter-out Debug/%, $(Source)))))
ifneq ($(SourceDepend),)
-include $(SourceDepend)
endif