# -*- Mode: makefile-gmake -*-

.PHONY: clean all debug release pkgconfig install install-dev

# Required packages
PKGS = glib-2.0

#
# Default target
#

all: debug release pkgconfig

#
# Library version
#

VERSION_MAJOR = 2
VERSION_MINOR = 2
VERSION_RELEASE = 6

VERSION = $(VERSION_MAJOR).$(VERSION_MINOR)
PCVERSION = $(VERSION_MAJOR).$(VERSION_MINOR).$(VERSION_RELEASE)

NAME = wspcodec
LIB_NAME = lib$(NAME)
LIB_SHORTCUT = $(LIB_NAME)-$(VERSION).so
LIB_SONAME = $(LIB_SHORTCUT)
LIB = $(LIB_SONAME).$(VERSION_RELEASE)

#
# Sources
#

SRC = wsputil.c

#
# Directories
#

SRC_DIR = wspcodec
BUILD_DIR = build
DEBUG_BUILD_DIR = $(BUILD_DIR)/debug
RELEASE_BUILD_DIR = $(BUILD_DIR)/release

#
# Tools and flags
#

CC = $(CROSS_COMPILE)gcc
LD = $(CC)
WARNINGS = -Wall
INCLUDES = -I$(SRC_DIR)
BASE_FLAGS = -fPIC
FULL_CFLAGS = $(BASE_FLAGS) $(CFLAGS) $(DEFINES) $(WARNINGS) $(INCLUDES) \
  -MMD -MP $(shell pkg-config --cflags $(PKGS))
FULL_LDFLAGS = $(BASE_FLAGS) $(LDFLAGS) -shared -Wl,-soname=$(LIB_SONAME) \
  $(shell pkg-config --libs $(PKGS))
DEBUG_FLAGS = -g
RELEASE_FLAGS =

KEEP_SYMBOLS ?= 0
ifneq ($(KEEP_SYMBOLS),0)
RELEASE_FLAGS += -g
endif

DEBUG_LDFLAGS = $(FULL_LDFLAGS) $(DEBUG_FLAGS)
RELEASE_LDFLAGS = $(FULL_LDFLAGS) $(RELEASE_FLAGS)

DEBUG_CFLAGS = $(FULL_CFLAGS) $(DEBUG_FLAGS) -DDEBUG
RELEASE_CFLAGS = $(FULL_CFLAGS) $(RELEASE_FLAGS) -O2

#
# Files
#

PKGCONFIG = $(BUILD_DIR)/$(LIB_NAME).pc
DEBUG_OBJS = $(SRC:%.c=$(DEBUG_BUILD_DIR)/%.o)
RELEASE_OBJS = $(SRC:%.c=$(RELEASE_BUILD_DIR)/%.o)

#
# Dependencies
#

DEPS = $(DEBUG_OBJS:%.o=%.d) $(RELEASE_OBJS:%.o=%.d)
ifneq ($(MAKECMDGOALS),clean)
ifneq ($(strip $(DEPS)),)
-include $(DEPS)
endif
endif

$(DEBUG_OBJS): | $(DEBUG_BUILD_DIR)
$(RELEASE_OBJS): | $(RELEASE_BUILD_DIR)
$(PKGCONFIG): | $(BUILD_DIR)

#
# Rules
#

DEBUG_LIB = $(DEBUG_BUILD_DIR)/$(LIB)
RELEASE_LIB = $(RELEASE_BUILD_DIR)/$(LIB)

debug: $(DEBUG_LIB)

release: $(RELEASE_LIB)

clean:
	rm -f *~ $(SRC_DIR)/*~
	rm -fr $(BUILD_DIR) RPMS installroot
	rm -fr debian/tmp debian/$(LIB_NAME) debian/$(LIB_NAME)-dev
	rm -f documentation.list debian/files debian/*.substvars
	rm -f debian/*.debhelper.log debian/*.debhelper
	rm -f debian/*.install debian/*~

$(BUILD_DIR):
	mkdir -p $@

$(DEBUG_BUILD_DIR):
	mkdir -p $@

$(RELEASE_BUILD_DIR):
	mkdir -p $@

$(DEBUG_LIB): $(DEBUG_OBJS)
	$(LD) $(DEBUG_OBJS) $(DEBUG_LDFLAGS) -o $@

$(RELEASE_LIB): $(RELEASE_OBJS)
	$(LD) $(RELEASE_OBJS) $(RELEASE_LDFLAGS) -o $@
ifeq ($(KEEP_SYMBOLS),0)
	strip $@
endif

$(DEBUG_BUILD_DIR)/%.o : $(SRC_DIR)/%.c
	$(CC) -c $(DEBUG_CFLAGS) -MT"$@" -MF"$(@:%.o=%.d)" $< -o $@

$(RELEASE_BUILD_DIR)/%.o : $(SRC_DIR)/%.c
	$(CC) -c $(RELEASE_CFLAGS) -MT"$@" -MF"$(@:%.o=%.d)" $< -o $@

#
# LIBDIR usually gets substituted with arch specific dir
# It's relative in deb build and can be whatever in rpm build.
#

LIBDIR ?= /usr/lib
ABS_LIBDIR := $(shell echo /$(LIBDIR) | sed -r 's|/+|/|g')

pkgconfig: $(PKGCONFIG)

$(PKGCONFIG): $(LIB_NAME).pc.in Makefile
	sed -e 's|@version@|$(PCVERSION)|g' -e 's|@libdir@|$(ABS_LIBDIR)|g' $< > $@

debian/%.install: debian/%.install.in
	sed 's|@LIBDIR@|$(LIBDIR)|g' $< > $@
#
# Install
#

INSTALL = install
INSTALL_DIRS = $(INSTALL) -d
INSTALL_FILES = $(INSTALL) -m 644

INSTALL_LIB_DIR = $(DESTDIR)$(ABS_LIBDIR)
INSTALL_INCLUDE_DIR = $(DESTDIR)/usr/include/$(NAME)
INSTALL_PKGCONFIG_DIR = $(DESTDIR)$(ABS_LIBDIR)/pkgconfig

INSTALL_ALIAS = $(INSTALL_LIB_DIR)/$(LIB_SHORTCUT)

install: $(INSTALL_LIB_DIR)
	$(INSTALL) -m 755 $(RELEASE_LIB) $(INSTALL_LIB_DIR)
	ln -sf $(LIB) $(INSTALL_ALIAS)

install-dev: install $(INSTALL_INCLUDE_DIR) $(INSTALL_PKGCONFIG_DIR)
	$(INSTALL_FILES) $(SRC_DIR)/wsputil.h $(INSTALL_INCLUDE_DIR)
	$(INSTALL_FILES) $(SRC_DIR)/wspcodec.h $(INSTALL_INCLUDE_DIR)
	$(INSTALL_FILES) $(PKGCONFIG) $(INSTALL_PKGCONFIG_DIR)

$(INSTALL_LIB_DIR):
	$(INSTALL_DIRS) $@

$(INSTALL_INCLUDE_DIR):
	$(INSTALL_DIRS) $@

$(INSTALL_PKGCONFIG_DIR):
	$(INSTALL_DIRS) $@