Commit af1b4600 authored by Timo Teräs's avatar Timo Teräs

build: rewrite make system to something slightly similar to kbuild

Tracks now probler header file dependencies and command line parameters
used to build files. E.g. changing CFLAGS rebuild all C-files. And changing
version rebuild now the files where it's used.
parent 9c5200f0
##
# A set of makefile rules loosely based on kbuild.
all: compile
ifndef build
toplevelrun:=yes
##
# Disable default rules and make output pretty.
MAKEFLAGS += -rR --no-print-directory
Makefile: ;
ifdef V
ifeq ("$(origin V)", "command line")
VERBOSE = $(V)
endif
endif
ifndef VERBOSE
VERBOSE = 0
endif
ifeq ($(VERBOSE),1)
quiet =
Q =
else
quiet=quiet_
Q = @
endif
ifneq ($(findstring s,$(MAKEFLAGS)),)
quiet=silent_
endif
export quiet Q VERBOSE
##
# Recursion helpers.
srctree := $(CURDIR)
objtree := $(CURDIR)
export srctree objtree
##
# Consult SCM for better version string.
GIT_REV := $(shell git describe || echo exported)
ifneq ($(GIT_REV), exported)
FULL_VERSION := $(patsubst $(PACKAGE)-%,%,$(GIT_REV))
FULL_VERSION := $(patsubst v%,%,$(FULL_VERSION))
else
FULL_VERSION := $(VERSION)
endif
RCS_FIND_IGNORE := \( -name SCCS -o -name BitKeeper -o -name .svn -o -name CVS -o -name .pc -o -name .hg -o -name .git \) -prune -o
export FULL_VERSION RCS_FIND_IGNORE
##
# Utilities and default flags for them.
CROSS_COMPILE ?=
CC := $(CROSS_COMPILE)gcc
LD := $(CROSS_COMPILE)ld
INSTALL := install
INSTALLDIR := $(INSTALL) -d
CFLAGS ?= -g
CFLAGS_ALL := -Werror -Wall -Wstrict-prototypes -D_GNU_SOURCE -std=gnu99
CFLAGS_ALL += $(CFLAGS)
LDFLAGS ?= -g
LDFLAGS_ALL += $(LDFLAGS)
export CC LD INSTALL INSTALLDIR CFLAGS_ALL LDFLAGS_ALL
build :=
endif
##
# Reset all variables.
ifneq ($(origin targets),file)
targets :=
endif
src :=
obj :=
src += $(build)
obj := $(build)
##
# Include directory specific stuff
ifneq ($(build),)
$(build)/Makefile: ;
include $(build)/Makefile
endif
##
# Rules and helpers
PHONY += all compile install clean FORCE
# Convinient variables
comma := ,
squote := '
empty :=
space := $(empty) $(empty)
# The temporary file to save gcc -MD generated dependencies must not
# contain a comma
depfile = $(subst $(comma),_,$(@D)/.$(@F).d)
build-dir = $(patsubst %/,%,$(dir $@))
target-dir = $(dir $@)
##
# Build rules
ifneq ($(NOCMDDEP),1)
# Check if both arguments has same arguments. Result in empty string if equal
# User may override this check using make NOCMDDEP=1
# Check if both arguments has same arguments. Result is empty string if equal.
# User may override this check using make KBUILD_NOCMDDEP=1
arg-check = $(strip $(filter-out $(cmd_$(1)), $(cmd_$@)) \
$(filter-out $(cmd_$@), $(cmd_$(1))) )
endif
# echo command.
# Short version is used, if $(quiet) equals `quiet_', otherwise full one.
echo-cmd = $(if $($(quiet)cmd_$(1)),\
echo ' $(call escsq,$($(quiet)cmd_$(1)))$(echo-why)';)
make-cmd = $(subst \#,\\\#,$(subst $$,$$$$,$(call escsq,$(cmd_$(1)))))
# printing commands
cmd = @$(echo-cmd) $(cmd_$(1))
# Name of target with a '.' as filename prefix. foo/bar.o => foo/.bar.o
dot-target = $(dir $@).$(notdir $@)
# The temporary file to save gcc -MD generated dependencies must not
# contain a comma
depfile = $(subst $(comma),_,$(dot-target).d)
# Escape single quote for use in echo statements
escsq = $(subst $(squote),'\$(squote)',$1)
# Find any prerequisites that is newer than target or that does not exist.
# PHONY targets skipped in both cases.
any-prereq = $(filter-out $(PHONY),$?) $(filter-out $(PHONY) $(wildcard $^),$^)
# Execute command if command has changed or prerequisite(s) are updated.
#
if_changed = $(if $(strip $(any-prereq) $(arg-check)), \
@set -e; \
$(echo-cmd) $(cmd_$(1)); \
echo 'cmd_$@ := $(make-cmd)' > $(dot-target).cmd)
# Usage: $(call if_changed_rule,foo)
# Will check if $(cmd_foo) or any of the prerequisites changed,
# and if so will execute $(rule_foo).
if_changed_rule = $(if $(strip $(any-prereq) $(arg-check) ), \
@set -e; \
$(rule_$(1)))
#####
# Handle options to gcc.
c_flags = -Wp,-MD,$(depfile) $(CFLAGS_ALL) $(CFLAGS_$(notdir $@))
ld_flags = $(LDFLAGS_ALL) $(LDFLAGS_$(notdir $@))
#####
# Compile c-files.
quiet_cmd_cc_o_c = CC $@
cmd_cc_o_c = $(CC) $(c_flags) -c -o $@ $<
define rule_cc_o_c
$(call echo-cmd,cc_o_c) $(cmd_cc_o_c); \
(echo 'cmd_$@ := $(call make-cmd,cc_o_c)'; \
echo -n "\n$(obj)/" ; cat $(depfile)) \
> $(dot-target).cmd ; \
rm $(depfile)
endef
$(obj)/%.o: $(src)/%.c FORCE
$(call if_changed_rule,cc_o_c)
#####
# Link programs
# Link an executable based on list of .o files, all plain c
# host-cmulti -> executable
__progs := $(addprefix $(obj)/,$(sort $(progs-y)))
cobjs := $(addprefix $(obj)/,$(sort $(foreach m,$(progs-y),$($(m)-objs))))
quiet_cmd_ld = LD $@
cmd_ld = $(CC) $(ld_flags) -o $@ \
$(addprefix $(obj)/,$($(@F)-objs)) \
$(LIBS) $(LIBS_$(@F))
$(__progs): $(obj)/%: $(cobjs) FORCE
$(call if_changed,ld)
targets += $(__progs) $(cobjs)
###
# why - tell why a a target got build
ifeq ($(VERBOSE),2)
why = \
$(if $(filter $@, $(PHONY)),- due to target is PHONY, \
$(if $(wildcard $@), \
$(if $(strip $(any-prereq)),- due to: $(any-prereq), \
$(if $(arg-check), \
$(if $(cmd_$@),- due to command line change: $(arg-check), \
$(if $(filter $@, $(targets)), \
- due to missing .cmd file, \
- due to $(notdir $@) not in $$(targets) \
) \
) \
) \
), \
- due to target missing \
) \
)
echo-why = $(call escsq, $(strip $(why)))
endif
##
# Top level rules.
%/: FORCE
$(Q)$(MAKE) -f Make.rules build=$(build-dir) $(MAKECMDGOALS)
compile install:: $(targets)
clean: $(filter %/,$(targets))
ifeq ($(toplevelrun),yes)
$(Q)find . $(RCS_FIND_IGNORE) \
\( -name '*.[oas]' -o -name '.*.cmd' -o -name '.*.d' \) \
-type f -print | xargs rm -f
endif
$(Q)rm -rf $(addprefix $(obj)/,$(sort $(progs-y) $(progs-n) $(progs-)))
FORCE:
# Read all saved command lines and dependencies for the $(targets) we
# may be building above, using $(if_changed{,_dep}). As an
# optimization, we don't need to read them if the target does not
# exist, we will rebuild anyway in that case.
targets := $(wildcard $(sort $(targets)))
cmd_files := $(wildcard $(foreach f,$(targets),$(dir $(f)).$(notdir $(f)).cmd))
ifneq ($(cmd_files),)
include $(cmd_files)
endif
# Declare the contents of the .PHONY variable as phony. We keep that
# information in a variable se we can use it in if_changed and friends.
.PHONY: $(PHONY)
# Makefile - one file to rule them all, one file to bind them
#
# Copyright (C) 2007 Timo Teräs <timo.teras@iki.fi>
# All rights reserved.
#
# This program is free software; you can redistribute it and/or modify it
# under the terms of the GNU General Public License version 3 as published
# by the Free Software Foundation. See http://www.gnu.org/ for details.
##
# Building apk-tools
PACKAGE := apk-tools
VERSION := 2.0_pre10
GIT_REV := $(shell git describe || echo exported)
ifneq ($(GIT_REV), exported)
ifneq ($(filter apk-tools-$(VERSION)%, $(GIT_REV)),)
FULL_VERSION := $(patsubst apk-tools-%,%,$(GIT_REV))
else
FULL_VERSION := $(GIT_REV)
endif
else
FULL_VERSION := $(VERSION)
endif
##
# Default directories
CC=gcc
INSTALL=install
INSTALLDIR=$(INSTALL) -d
DESTDIR :=
SBINDIR := /sbin
CONFDIR := /etc/apk
MANDIR := /usr/share/man
DOCDIR := /usr/share/doc/apk
CFLAGS?=-g -Werror -Wall -Wstrict-prototypes
CFLAGS+=-D_GNU_SOURCE -std=gnu99 -DAPK_VERSION=\"$(FULL_VERSION)\"
export DESTDIR SBINDIR CONFDIR MANDIR DOCDIR
LDFLAGS?=-g
LDFLAGS+=-nopie
LIBS=/usr/lib/libz.a
##
# Top-level rules and targets
ifeq ($(STATIC),yes)
CFLAGS+=-fno-stack-protector
LDFLAGS+=-static
endif
targets := src/
DESTDIR=
SBINDIR=/sbin
CONFDIR=/etc/apk
MANDIR=/usr/share/man
DOCDIR=/usr/share/doc/apk
##
# Include all rules and stuff
SUBDIRS=src
include Make.rules
.PHONY: compile install clean all static
all: compile
static:
$(MAKE) $(MFLAGS) -C src apk.static
compile install clean::
@for i in $(SUBDIRS); do $(MAKE) $(MFLAGS) -C $$i $(MAKECMDGOALS); done
##
# Top-level targets
install::
$(INSTALLDIR) $(DESTDIR)$(DOCDIR)
$(INSTALL) README $(DESTDIR)$(DOCDIR)
clean::
rm -rf $(TARBALL)
TARBALL := $(PACKAGE)-$(VERSION).tar.bz2
dist: $(TARBALL)
$(TARBALL):
rm -rf $(PACKAGE)
git clone . $(PACKAGE)
cd $(PACKAGE) && (cd .. && git diff) | patch -p1
tar -cjf $@ $(PACKAGE)
rm -rf $(PACKAGE)
.EXPORT_ALL_VARIABLES:
static:
$(Q)$(MAKE) STATIC=y
# Makefile - one file to rule them all, one file to bind them
#
# Copyright (C) 2007 Timo Teräs <timo.teras@iki.fi>
# All rights reserved.
#
# This program is free software; you can redistribute it and/or modify it
# under the terms of the GNU General Public License version 3 as published
# by the Free Software Foundation. See http://www.gnu.org/ for details.
progs-y += apk
apk-objs := state.o database.o package.o archive.o \
version.o io.o url.o gunzip.o blob.o \
hash.o md5.o apk.o \
add.o del.o ver.o index.o info.o search.o \
fetch.o audit.o
CFLAGS_apk.o := -DAPK_VERSION=\"$(FULL_VERSION)\"
TARGETS = apk
progs-$(STATIC) += apk.static
apk.static-objs := $(apk-objs)
LDFLAGS_apk.static := -static
apk_OBJS = \
state.o \
database.o \
package.o \
archive.o \
version.o \
io.o \
url.o \
gunzip.o \
blob.o \
hash.o \
md5.o \
add.o \
del.o \
ver.o \
index.o \
info.o \
search.o \
fetch.o \
audit.o \
apk.o
ALL_OBJS = $(apk_OBJS)
all: $(TARGETS)
apk: $(apk_OBJS)
$(CC) $(LDFLAGS) -o $@ $^ $(LIBS)
apk.static: $(apk_OBJS)
$(CC) $(LDFLAGS) -static -o $@ $^ $(LIBS)
clean::
@rm -f $(TARGETS) $(ALL_OBJS)
LIBS := /usr/lib/libz.a
install::
$(INSTALLDIR) $(DESTDIR)$(SBINDIR)
$(INSTALL) $(TARGETS) $(DESTDIR)$(SBINDIR)
$(INSTALL) $(obj)/apk $(DESTDIR)$(SBINDIR)
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