# Generic configuration for Hurd compilation

# Directory makefiles should set the variable makemode to either
# `server' if they compile and install a single program for /hurd
# `utility' if they compile and install a single program for /bin
# `servers' if they compile and install multiple programs for /hurd
# `utilities' if they compile and install multiple programs for /bin
# `library' if they compile and install a library
# `misc' if they do none of those

# Every makefile should define
# SRCS (all actual source code)
# LCLHDRS (all source headers in this directory [NOT MiG created])
# OBJS (all .o files used to produce some target).
# HURDLIBS (all Hurd libraries used; with no directory name or `lib' attached)
#   For types `server' and `utility' an automatic dependency will be
#   written for these, and type `library' will include a .so dependency.
#   Types `servers' and `utilities'; you have to do it yourself.

# Types `server' and `utility' should define
#   target (the name of the program built)
#   OTHERLIBS (all libraries used)

# Types `servers' and `utilities' should define
#   targets (the names of all the programs built)
#   special-targets (targets which should not be built the normal way
#    and have their own rules)

# Type `library' should define
#   libname (the name of the library, without .a.)
#   installhdrs (header files that should be installed in /include)
#   installhdrsubdir (the subdirectory they should go in, default `hurd')
# and must not define $(targets).

# Put this first so it's the default
all:

# What version of the Hurd is this?
hurd-version := 0.2

# Figure out how to locate the parent directory from here.
ifeq (.,$(dir))
.. =
else
.. = ../
endif

ifndef srcdir
# We are building in the source directory itself.
srcdir = .
ifeq (.,$(dir))
top_srcdir = .
else
top_srcdir = ..
endif
endif

# Include the configure-generated file of parameters.
# This sets up variables for build tools and installation directories.
include $(..)config.make

# Test build options set by configure.
ifeq (no,$(build-profiled))
no_prof = t
endif


# Flags for compilation.
# It is important to have this inclusion first; that picks up our
# library header files locally rather than from installed copies.
# Append to any value set by the specific Makefile or by configure.
ifeq ($(srcdir),.)
srcdirinc=
else
srcdirinc=-I$(srcdir)
endif
ifeq ($(top_srcdir),..)
top_srcdirinc=
else
top_srcdirinc=-I$(top_srcdir)
endif
CPPFLAGS += -I. $(srcdirinc) -I.. $(top_srcdirinc) -I$(top_srcdir)/include -D_GNU_SOURCE $($*-CPPFLAGS)
CFLAGS += -Wall -g -O3

# More useful version of HURDLIBS
library_deps=$(foreach lib,$(HURDLIBS),$(..)lib$(lib)/lib$(lib).so)

# Local programs:
MKINSTALLDIRS = $(top_srcdir)/mkinstalldirs



# Decode makemode:


ifeq ($(makemode),server)
 doinst := one
 installationdir := $(hurddir)
 clean := yes
 linktarg := $(target)
endif

ifeq ($(makemode),utility)
 doinst := one
 ifndef installationdir
   installationdir := $(bindir)
 endif
 clean := yes
 linktarg := $(target)
endif

ifeq ($(makemode),servers)
 doinst := many
 installationdir := $(hurddir)
 clean := yes
 linktarg := $(targets)
endif

ifeq ($(makemode),utilities)
 doinst := many
 ifndef installationdir
   installationdir := $(bindir)
 endif
 clean := yes
 linktarg := $(targets)
endif

ifeq ($(makemode),library)
 linktarg := $(libname).so.$(hurd-version)
 clean := yes
 cleantarg := $(libname).a $(libname)_p.a $(libname).so $(libname)_pic.a $(linktarg)
 ifndef installhdrsubdir
  installhdrsubdir = hurd
 endif
 ifeq ($(no_pic),t)
  ifeq ($(no_prof),t)
   targets := $(libname).a $(libname).so
  else
   targets := $(libname).a $(libname).so $(libname)_p.a
  endif
 else
  ifeq ($(no_prof),t)
   targets := $(libname).a $(libname).so $(libname)_pic.a
  else
   targets := $(libname).a $(libname).so $(libname)_pic.a $(libname)_p.a
  endif
 endif
else
 linktarg := $(linktarg) $(linktarg:=.static)
endif

ifeq ($(cleantarg),)
 cleantarg := $(linktarg)
endif


# This is a hack to give all hurd utilities a default bug-reporting
# address (defined in libhurdbugaddr/bugaddr.c).
BUGADDR = $(..)libhurdbugaddr/libhurdbugaddr.a
BUGADDR_REF = -uargp_program_bug_address

# Standard targets

.PHONY: all install libs relink clean objs

# Just build all the object files.
objs: $(OBJS)
ifneq ($(no_prof),t)
objs: $(OBJS:%.o=%_p.o)
endif
ifeq ($(makemode),library)
ifneq ($(no_pic),t)
objs: $(OBJS:%.o=%_pic.o)
endif
endif

# Installation
ifndef targets
targets = $(target)
endif
installable := $(sort $(linktarg) $(targets))
install-targets := $(targets) $(filter $(build-static:=.static),$(linktarg))
all: $(install-targets)
install: $(installationdir) $(addprefix $(installationdir)/,$(install-targets))
$(addprefix $(installationdir)/,$(installable)): $(installationdir)/%: %
	$(INSTALL_PROGRAM) $(INSTALL-$<-ops) $< $@

ifeq ($(makemode),library)
all: libs
install libs: add-to-librecord
add-to-librecord: $(targets)
install: $(libdir) $(includedir)/$(installhdrsubdir) $(libdir)/$(libname).so.$(hurd-version) $(addprefix $(libdir)/,$(targets)) $(addprefix $(includedir)/$(installhdrsubdir)/,$(installhdrs))

install-headers: $(includedir)/$(installhdrsubdir) $(addprefix $(includedir)/$(installhdrsubdir)/,$(installhdrs))

$(includedir)/$(installhdrsubdir): $(includedir)
	@$(MKINSTALLDIRS) $@

# Arrange to have the headers installed locally anytime we build the library.
# Not quite perfect, but at least it does end up getting done; and once done
# it never needs to be repeated for a particular header.
ifeq ($(installhdrsubdir),.)
INSTALLED_LOCAL_HEADERS=$(addprefix $(top_srcdir)/include/,$(installhdrs))
$(INSTALLED_LOCAL_HEADERS): $(top_srcdir)/include/%:
	ln -s ../$(dir)/$* $@
else
INSTALLED_LOCAL_HEADERS=$(addprefix $(top_srcdir)/$(installhdrsubdir)/,$(installhdrs))
$(INSTALLED_LOCAL_HEADERS): $(top_srcdir)/$(installhdrsubdir)/%:
	ln -s ../$(dir)/$* $@
endif
libs: $(INSTALLED_LOCAL_HEADERS)

$(addprefix $(libdir)/$(libname),_p.a .a _pic.a): $(libdir)/%: %
	$(INSTALL_DATA) $< $@
	$(RANLIB) $@

$(libdir)/$(libname).so.$(hurd-version): $(libname).so.$(hurd-version)
	$(INSTALL_DATA) $< $@

$(libdir)/$(libname).so: $(libdir)/$(libname).so.$(hurd-version)
	ln -f -s $(<F) $@

$(addprefix $(includedir)/$(installhdrsubdir)/,$(installhdrs)): $(includedir)/$(installhdrsubdir)/%: %
	$(INSTALL_DATA) $< $@

endif

# Provide default.
install:
install-headers:

# Making installation directories
$(installationdirlist): %:
	@$(MKINSTALLDIRS) $@

# Building the target
ifeq ($(doinst),many)
 target = $(filter-out $(special-targets),$(targets))
endif

ifeq ($(doinst),one)
$(target) $(target).static: $(OBJS) $(OTHERLIBS) $(library_deps)
endif

# Determine which sort of library we should link against from whether -static
# is used in LDFLAGS.
__libext=.so
__libext-static=.a
_libext=$(__libext$(findstring -static,$(LDFLAGS) $($*-LDFLAGS)))

libsubst=$(basename ${lib})$(_libext)
libsubst-override=${$(notdir $(basename ${lib}))-libsubst}
_libsubst=${libsubst$(patsubst %,-override,${libsubst-override})}

# Direct the linker where to find shared objects specified in the
# dependencies of other shared objects it encounters.
rpath := -Wl,-rpath-link=.:$(subst $. ,:,$(dir $(wildcard ../lib*/lib*.so)))

# Main rule to link executables
#
# (prof-depend is a special kind of run not normally used; see the rules
# below for %.prof_d which uses it.)
ifeq ($(prof-depend),)

define link-executable
$(CC) $(rpath) $(CFLAGS) $($*-CFLAGS) $(LDFLAGS) $($*-LDFLAGS) \
      $(BUGADDR_REF) \
      -o $@
endef
$(target): %$(target-suffix): $(BUGADDR)
	$(link-executable) \
              $(filter %.o,$^) \
	      '-Wl,-(' $(foreach lib,$(filter-out %.o,$^),${_libsubst}) \
		       $($*-LDLIBS) $(LDLIBS) \
	      '-Wl,-)'

$(addsuffix .static,$(target)): %$(target-suffix).static: $(BUGADDR)
	$(link-executable) -static \
	      '-Wl,-(' $(patsubst %.so,%.a,$^) $($*-LDLIBS) $(LDLIBS) \
	      '-Wl,-)'
endif

# Just like above, but tell how to make .prof versions of programs.
$(addsuffix .prof,$(target)): %$(target-suffix).prof: $(BUGADDR)
	$(CC) -pg $(CFLAGS) $($*-CFLAGS) $(LDFLAGS) $($*-LDFLAGS) \
		$(BUGADDR_REF) -static \
		-o $@ \
		'-Wl,-(' $^ $($*-LDLIBS) $(LDLIBS) \
		'-Wl,-)'

ifeq ($(makemode),library)
$(libname).a: $(OBJS)
	rm -f $(libname).a
	$(AR) r $@ $^
	$(RANLIB) $@

$(libname)_p.a: $(patsubst %.o,%_p.o,$(OBJS))
	rm -f $(libname)_p.a
	$(AR) r $@ $^
	$(RANLIB) $@

$(libname)_pic.a: $(patsubst %.o,%_pic.o,$(OBJS))
	rm -f $(libname)_pic.a
	$(AR) r $@ $^
	$(RANLIB) $@

# The shared object needs to be findable in the build directory as
# libfoo.so.VERSION (i.e. its soname) so that ld finds it when looking
# for dependencies of other shared libraries.
# But we also need the libfoo.so name that -lfoo looks for, so
# we make that a symlink.
$(libname).so.$(hurd-version): $(patsubst %.o,%_pic.o,$(OBJS)) $(library_deps)
	$(CC) -shared -Wl,-soname=$@ -o $@ \
	      $(rpath) $(CFLAGS) $(LDFLAGS) $($@-LDFLAGS) $^
$(libname).so: $(libname).so.$(hurd-version)
	ln -f -s $< $@
endif

# Providing directory dependencies
ifneq ($(makemode),library)
hurd-bug-addr-dir-dep = libhurdbugaddr
endif

directory-depend: $(..)$(dir).d
$(..)$(dir).d: $(srcdir)/Makefile
	rm -f $@
	echo $(dir): $(hurd-bug-addr-dir-dep) $(addprefix lib,$(HURDLIBS)) > $@

# Making a snapshot
distfiles = Makefile ChangeLog $(SRCS) $(LCLHDRS) $(DIST_FILES)
lndist: $(distfiles) $(top_srcdir)/hurd-snap/$(dir) FORCE
	ln $(addprefix $(srcdir)/,$(distfiles)) $(top_srcdir)/hurd-snap/$(dir)

ifeq ($(dir),.)
$(top_srcdir)/hurd-snap/$(dir):
else
$(top_srcdir)/hurd-snap/$(dir):
	mkdir $@
endif

# TAGS files
ifneq ($(dir),.)
DEP_SRCS = sed -e 's/^.*://' -e 's/ \\$$//' | tr ' ' '\012'| \
	   sed -n -e 's@^$(srcdir)@&@p' -e 's@^[^/]@&@p' | sort -ur
ifeq ($(OBJS),)
TAGS: $(OTHERTAGS)
ifeq ($(OTHERTAGS),)
# no tags, but parent will include this file, so make empty one.
	> $@
else
	etags -o $@ $^
endif
else
TAGS: $(OBJS:.o=.d) $(OTHERTAGS)
	cat $(OBJS:.o=.d) | $(DEP_SRCS) | etags -o $@ - $(OTHERTAGS)
endif
endif

# Cleaning
ifeq ($(clean),yes)
clean:
	rm -f *.d *.*_d *.o *Server.c *User.c *_S.h *_U.h $(cleantarg)
relink:
	rm -f $(linktarg)
endif

clean:
relink:



# Subdependencies

# We record which libraries have been built in this run in the file
# $(librecord).  That file contains a series of lines like
# `../libfoo/libfoo.a ../libfoo/libfoo.so: ; /bin/true'
# that serve to inhibit the pattern rule which follows from doing anything.
# Above, when we make `libs' in library directories, we always append
# to $(librecord), so that future make invocations don't bother repeating
# the effort.

# if this is the first level, then set librecord.  Otherwise, read it in.
#ifeq ($(MAKELEVEL),0)
#librecord:=/tmp/hurd-make-$(shell echo $$$$)
#export librecord
#else
#include $(librecord)
#endif

# How to create it.
#$(librecord):
#	touch $(librecord)

# `libs' target depends on this.
#add-to-librecord:
#	echo $(addprefix ../$(dir)/,$(targets)) : \; /bin/true >> $(librecord)

# Building libraries from other directories.  We force both libraries to be
# built if either is, because it will use the appropriate one even if the other
# is specified in someone's dependency list.
#../%.a ../%.so: FORCE
#	$(MAKE) -C $(dir $@) libs

# Tell make where to find other -l libraries that we use
vpath libutil.% $(libdir)/


# Default rules to build PIC object files.
%_pic.o: %.c
	$(COMPILE.c) $< -DPIC -fPIC -o $@

%_pic.o: %.S
	$(COMPILE.S) $< -DPIC -o $@

# Default rules to build profiled object files.
%_p.o: %.c
	$(COMPILE.c)  $< -DPROF -pg -o $@

%_p.o: %.S
	$(COMPILE.S) $< -DPROF -o $@

# How to build RPC stubs

# User settable variables:
# 	MIGSFLAGS	   flags to CPP when building server stubs and headers
#	foo-MIGSFLAGS	   same, but only for interface `foo'
# 	MIGCOMSFLAGS	   flags to MiG when building server stubs and headers
#	foo-MIGCOMSFLAGS   same, but only for interface `foo'
# 	MIGUFLAGS	   flags to CPP when building user stubs and headers
#	foo-MIGUFLAGS	   same, but only for interface `foo'
# 	MIGCOMUFLAGS	   flags to MiG when building user stubs and headers
#	foo-MIGCOMUFLAGS   same, but only for interface `foo'
#	CPPFLAGS	   flags to CPP

# Implicit rules for building server and user stubs from mig .defs files.
%_S.h %Server.c: %.defs
	$(CPP) $(CPPFLAGS) $(MIGSFLAGS) $($*-MIGSFLAGS) -DSERVERPREFIX=S_ $< \
	| $(MIGCOM) $(MIGCOMSFLAGS) $($*-MIGCOMSFLAGS) \
		    -sheader $*_S.h -server $*Server.c \
		    -user /dev/null -header /dev/null
%_U.h %User.c: %.defs
	$(CPP) $(CPPFLAGS) $(MIGUFLAGS) $($*-MIGUFLAGS) $< \
	| $(MIGCOM) $(MIGCOMUFLAGS) $($*-MIGCOMUFLAGS) \
		    -user $*User.c -server /dev/null -header $*_U.h

# Where to find .defs files.
vpath %.defs $(top_srcdir)/hurd

# These we want to find in the libc include directory...
mach_defs_names = bootstrap default_pager default_pager_helper exc mach mach4 \
	mach_host mach_norma mach_port mach_timer_reply memory_object \
	memory_object_default norma_task notify
device_defs_names = dev_forward device device_reply device_request

mach_defs = $(addsuffix .defs,$(mach_defs_names))
device_defs = $(addsuffix .defs,$(device_defs_names))

$(mach_defs): %.defs:
	echo '#include <mach/$@>' > $@
$(device_defs): %.defs:
	echo '#include <device/$@>' > $@


FORCE:


# How to build automatic dependencies

# Don't include dependencies if $(no_deps) is set; the master makefile
# does this for clean and other such targets that don't need
# dependencies.  That then avoids rebuilding dependencies.

ifneq ($(no_deps),t)

# For each file generated by MiG we need a .d file.
# These lines assume that every Makefile that uses a foo_S.h or foo_U.h file
# also mentions the associated fooServer.o or fooUser.o file.
-include $(subst Server.o,.migs_d,$(filter %Server.o,$(OBJS))) /dev/null
-include $(subst User.o,.migu_d,$(filter %User.o,$(OBJS))) /dev/null
-include $(subst Server.o,.migsh_d,$(filter %Server.o,$(OBJS))) /dev/null
-include $(subst User.o,.miguh_d,$(filter %User.o,$(OBJS))) /dev/null

ifneq ($(makemode),library)
ifneq ($(prof-depend),t)
ifneq ($(no_prof),t)
-include $(addsuffix .prof_d,$(target)) /dev/null
endif
endif
endif

# For each .o file we need a .d file.
-include $(subst .o,.d,$(filter %.o,$(OBJS))) /dev/null

endif

# Here is how to build those dependency files

# Dependencies for fooServer.c files.
%.migs_d: %.defs
	(set -e; $(CPP) $(CPPFLAGS) $(MIGSFLAGS) $($*-MIGSFLAGS) \
		 -DSERVERPREFIX=S_ -M -MG $< | \
	sed -e 's/\.defs\.o:/Server\.c $@:/' > $@)

# Dependencies for fooUser.c files.
%.migu_d: %.defs
	(set -e; $(CPP) $(CPPFLAGS) $(MIGUFLAGS) $($*-MIGUFLAGS) \
		-M -MG $< | \
	sed -e 's/\.defs\.o:/User\.c $@:/' > $@)

# The associated .h files are build by the same CCP, so a simple massaging
# of the previous two will work.
%.migsh_d: %.migs_d
	sed -e 's/Server\.c/_S\.h/' -e 's/migs_d/migsh_d/' < $< > $@
%.miguh_d: %.migu_d
	sed -e 's/User\.c/_U\.h/' -e 's/migu_d/miguh_d/' < $< > $@

%.prof_d: $(srcdir)/Makefile
	$(MAKE) $* prof-depend=t

ifeq ($(prof-depend),t)
$(target): %: FORCE
	rm -f $@.prof_d
	echo $@.prof: $(subst .so,_p.a,$(subst .o,_p.o,$(filter-out FORCE,$+))) > $@.prof_d
endif

define make-deps
set -e; $(CC) $(CFLAGS) $(CPPFLAGS) -M -MG $<  | \
sed > $@.new -e 's/$*\.o:/$*.o $*_pic.o $*_p.o $@:/' \
	     -e 's% [^ ]*/gcc-lib/[^ ]*\.h%%g'
mv -f $@.new $@
endef

# Here is how to make .d files from .c files
%.d: %.c; $(make-deps)
# Here is how to make .d files from .S files
%.d: %.S; $(make-deps)

# .s files don't go through the preprocessor, so we do this
# This rule must come *after* the genuine ones above, so that
# make doesn't build a .s file and then make an empty dependency
# list.
%.d: %.s
	echo '$*.o: $<' > $@

# Rule to make executable shell scripts from .sh files.
%: %.sh $(top_srcdir)/sh-version.sed
	sed -e 's/STANDARD_HURD_VERSION_\\(.[^_]*\\)_/\\1 (GNU Hurd) $(hurd-version)/' < $< > $@
	chmod +x $@