# $Id: common.gmk,v 1.54 2009/02/26 16:29:08 gcosmo Exp $
# ----------------------------------------------------------------
# Common part of GNUmakefile for libraries.  John Allison, 5/7/95.
# ----------------------------------------------------------------
# Libraries are created according to G4SYSTEM. G.Cosmo, 11/6/96.
# Introduced G4LIBDIR and G4TMPDIR. G.Cosmo, 23/6/98.
# Introduced Qt moc rule, L.Garnier 15/2/08.

ifndef G4LIBDIR
  G4LIBDIR := $(G4LIB)/$(G4SYSTEM)
endif
G4TMPDIR := $(G4TMP)/$(G4SYSTEM)/$(name)

sources      := $(wildcard src/*.cc)
dependencies := $(patsubst src/%.cc,$(G4TMPDIR)/%.d,$(sources))
objects      := $(patsubst src/%.cc,$(G4TMPDIR)/%.o,$(sources))

ifneq ($(G4INTY_BUILD_QT),)
 sources      += $(moc_sources)
 dependencies += $(moc_dependencies)
 objects      += $(moc_objects)
endif

   g4libraries_to_build :=
ifeq ($(G4LIB_NO_SHARED),)
ifneq ($(G4LIB_BUILD_SHARED),)
   g4libraries_to_build += $(G4LIBDIR)/lib$(name).$(SHEXT)
endif
endif
ifneq ($(G4LIB_BUILD_STATIC),)
   g4libraries_to_build += $(G4LIBDIR)/lib$(name).a
endif

# GPPFLAGS is defined here to make the .d file(s) and include it(them).

GPPFLAGS := "-M"

###############################################################################
#
# Actual gmake targets.
#

lib: $(g4libraries_to_build)

ifeq ($(G4LIB_NO_SHARED),)
ifneq ($(G4LIB_BUILD_SHARED),)
# Make shared library.
$(G4LIBDIR)/lib$(name).$(SHEXT): $(G4TMPDIR)/obj.last
	@if [ ! -d $(G4LIBDIR) ] ; then mkdir $(G4LIBDIR) ;fi
	@echo Creating shared library $@ ...
	@$(RM) $@
#      use architecture specific macro defined in sys/$(G4SYSTEM).gmk
	$(build-granular-shared-lib)
endif
endif

ifneq ($(G4LIB_BUILD_STATIC),)
# Make static (archive) library.
$(G4LIBDIR)/lib$(name).a: $(G4TMPDIR)/obj.last
	@if [ ! -d $(G4LIBDIR) ] ; then mkdir $(G4LIBDIR) ;fi
	@echo Creating/replacing object files in $(G4LIBDIR)/lib$(name).a ...
	@rm -f $(G4LIBDIR)/lib$(name).a
	@$(AR) $(OUT_LIB)$(G4LIBDIR)/lib$(name).a $(G4TMPDIR)/*.o
	@if [ X$(G4SYSTEM) != XWIN32-VC ] ; then  \
	if [ -f /usr/bin/ranlib -o -f /bin/ranlib ] ; then \
	ranlib $(G4LIBDIR)/lib$(name).a ; fi ; fi
endif


###############################################################################
#
# Actual targets for .o, .d files
#

$(G4TMPDIR)/%.o: src/%.cc
ifdef CPPVERBOSE
	$(CXX) $(CXXFLAGS) $(CPPFLAGS) -c $(OUT_OBJ)$(G4TMPDIR)/$(*F).o src/$*.cc
else
	@echo Compiling $*.cc ...
	@$(CXX) $(CXXFLAGS) $(CPPFLAGS) -c $(OUT_OBJ)$(G4TMPDIR)/$(*F).o src/$*.cc
endif

# .PHONY targets are executed regardless of time-stamp of any file of
# same name.
.PHONY: all obj lib clean clean_libs includes

obj: $(G4TMPDIR)/obj.last

# Touch the versioning file
$(G4TMPDIR)/obj.last: $(objects)
	@$(TOUCH) $@

# Make the .d file(s) and include it(them).

# The ideas for this come from the GNU Make Manual, Section 4.12,
# Generating Prerequisites Automatically.  The g++ compiler has an
# option -M or -MM to write to standard output a list of dependencies
# based on the #include statements.  The "sed" adds the dependency
# file itself as a second target.  The result is a mini-makefile which
# specifies the .o and .d files as targets which depend on all the
# files found through the #include statements.  This file is then
# included, causing GNU Make to honour these dependencies.

# The "set -e" causes the shell to exit with an error when the "g++"
# fails (otherwise it would only notice the last command in the
# pipeline, namely "sed").  GNU Make notices the error and exits
# sooner than it otherwise would (still not as soon as I expect,
# though!).  Even then, an empty file is made, so "[ -s $@ ] || rm -f
# $@" removes it ([ -s filename ] gives zero exit code only if file
# exists and has a size greater than zero).  This avoids making
# corrupt .d files which would play havoc with your next build.

$(G4TMPDIR)/%.d: src/%.cc
	@echo Making dependency for file $< ...
	@if [ ! -d $(G4TMPDIR) ] ; then mkdir -p $(G4TMPDIR)  ;fi
	@set -e;\
	g++ $(GPPFLAGS) $(CPPFLAGS) -w $< |\
	sed 's!$*\.o!$(G4TMPDIR)/& $@!' >$@;\
	[ -s $@ ] || rm -f $@
ifneq ($(dependencies),)
ifneq ($(MAKECMDGOALS),clean)
-include $(dependencies)
endif
endif

#
# Installation of include files
#
installed_includes:=$(foreach file,$(wildcard include/*),$(shell test -f $(file) && echo $(file)))
installed_includes:=$(patsubst include/%,$(G4INCLUDE)/%,$(installed_includes))

# NOTE: the double colon rule allows to add other rules for the same target
#
includes:: $(installed_includes)

# Static Pattern rules, see GNU make manual for details.
#           target(s): target-pattern : dep-pattern
#
$(installed_includes): $(G4INCLUDE)/% : include/%
	@cp -p $< $@

#
# Clean up libraries
#
ifndef G4EXLIB
clean::
	@echo Cleaning up ...
	@rm -f $(G4LIBDIR)/lib$(name).a
	@rm -f $(G4LIBDIR)/*$(name).lib
	@rm -f $(G4LIBDIR)/*$(name).exp
	@rm -f $(G4LIBDIR)/lib$(name).$(SHEXT)
	@rm -rf $(G4TMPDIR)
	@rm -rf moc
endif

clean_libs::
	@echo Removing library lib$(name).a ...
	@rm -f $(G4LIBDIR)/*$(name).a
	@echo Removing library lib$(name).$(SHEXT) ...
	@rm -f $(G4LIBDIR)/*$(name).lib
	@rm -f $(G4LIBDIR)/*$(name).exp
	@rm -f $(G4LIBDIR)/*$(name).$(SHEXT)