#                                 Makefile.common
#
# 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 may be set by setting incoming variables:
#
# 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.
#
# 3. 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.
#

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

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

#--------------------------------------------------------------------
# Installation configuration options... 
#--------------------------------------------------------------------

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

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

# Add -L options to the link command lines...
LibPathsO = -L $(LEVEL)/lib/VMCore/Release \
            -L $(LEVEL)/lib/Assembly/Parser/Release \
            -L $(LEVEL)/lib/Assembly/Writer/Release \
            -L $(LEVEL)/lib/Analysis/Release \
            -L $(LEVEL)/lib/Bytecode/Writer/Release \
            -L $(LEVEL)/lib/Bytecode/Reader/Release \
            -L $(LEVEL)/lib/Optimizations/Release

LibPathsG = $(LibPathsO:Release=Debug)

# Enable this for profiling support with 'gprof'
#Prof = -pg

# TODO: Get rid of exceptions! : -fno-exceptions -fno-rtti
CompileCommonOpts = $(Prof) -Wall -Winline -W  -Wwrite-strings -Wno-unused -I$(LEVEL)/include

# Compile a file, don't link...
Compile  = $(CXX) -c $(CPPFLAGS) $(CXXFLAGS) $(CompileCommonOpts)
CompileG = $(Compile) -g  -D_DEBUG
# Add This for DebugMalloc: -fno-defer-pop
CompileO = $(Compile) -O3 -DNDEBUG -finline-functions -felide-constructors -fnonnull-objects -freg-struct-return -fshort-enums

# Link final executable
Link     = $(CXX) $(Prof) 
LinkG    = $(Link) -g $(LibPathsG)
LinkO    = $(Link) -O3 $(LibPathsO)

# Create a .so file from a .cpp file...
#MakeSO   = $(CXX) -shared $(Prof)
MakeSO   = $(CXX) -G $(Prof)
MakeSOG  = $(MakeSO) -g
MakeSOO  = $(MakeSO) -O3

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

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

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

# Source includes all of the cpp files, and objects are derived from the
# source files...
ifndef Source
Source   = $(wildcard *.cpp *.c *.y *.l)
endif
Objs = $(sort $(addsuffix .o,$(basename $(Source))))
ObjectsO = $(addprefix Release/,$(Objs))
ObjectsG = $(addprefix Debug/,$(Objs))

#---------------------------------------------------------
# Handle the DIRS option
#---------------------------------------------------------

ifdef DIRS  # Only do this if we're using DIRS!

all     :: $(addsuffix /.makeall    , $(DIRS))
install :: $(addsuffix /.makeinstall, $(DIRS))
clean   :: $(addsuffix /.makeclean  , $(DIRS))

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

#---------------------------------------------------------
# Handle the LIBRARYNAME option - used when building libs...
#---------------------------------------------------------

ifdef LIBRARYNAME
LIBNAME_O := Release/lib$(LIBRARYNAME).so
LIBNAME_G := Debug/lib$(LIBRARYNAME).so

all:: $(LIBNAME_G)
#$(LIBNAME_O)
# TODO: Enable optimized builds

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

$(LIBNAME_G): $(ObjectsG) $(LibSubDirs) Debug/.dir Depend/.dir
	@echo ======= Linking $(LIBRARYNAME) debug library =======
	$(MakeSOG) -o $@ $(ObjectsG) $(LibSubDirs) $(LibLinkOpts)

endif


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

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

# Create .o files in the ObjectFiles directory from the .cpp files...
Release/%.o: %.cpp Release/.dir Depend/.dir
	$(CompileO) $< -o $@

Debug/%.o: %.cpp Debug/.dir Depend/.dir
	$(CompileG) $< -o $@

# Create a .cpp source file from a flex input file... this uses sed to cut down
# on the warnings emited by GCC...
%.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/' > $@

# Rule for building the bison parsers...

%.cpp %.h : %.y
	bison -d -p $(<:%Parser.y=%) $(basename $@).y
	mv -f $(basename $@).tab.c $(basename $@).cpp
	mv -f $(basename $@).tab.h $(basename $@).h

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

# Clean does not remove the output files... just the temporaries
clean::
	rm -rf Debug Release Depend
	rm -f core *.o *.d *.so *~ *.flc

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