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#############################################################
#
# libpng (Portable Network Graphic library)
#
#############################################################
# Copyright (C) 2001-2003 by Erik Andersen <andersen@codepoet.org>
# Copyright (C) 2002 by Tim Riker <Tim@Rikers.org>
#
# This program is free software; you can redistribute it and/or modify
# it under the terms of the GNU Library General Public License as
# published by the Free Software Foundation; either version 2 of the
# License, or (at your option) any later version.
#
# This program is distributed in the hope that it will be useful, but
# WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
# Library General Public License for more details.
#
# You should have received a copy of the GNU Library General Public
# License along with this program; if not, write to the Free Software
# Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307
# USA

LIBPNG_VER:=1.2.12
LIBPNG_DIR:=$(BUILD_DIR)/libpng-$(LIBPNG_VER)
LIBPNG_SITE:=http://$(BR2_SOURCEFORGE_MIRROR).dl.sourceforge.net/sourceforge/libpng
LIBPNG_SOURCE:=libpng-$(LIBPNG_VER).tar.bz2
LIBPNG_CAT:=$(BZCAT)

$(DL_DIR)/$(LIBPNG_SOURCE):
	 $(WGET) -P $(DL_DIR) $(LIBPNG_SITE)/$(LIBPNG_SOURCE)

libpng-source: $(DL_DIR)/$(LIBPNG_SOURCE)

$(LIBPNG_DIR)/.unpacked: $(DL_DIR)/$(LIBPNG_SOURCE)
	$(LIBPNG_CAT) $(DL_DIR)/$(LIBPNG_SOURCE) | tar -C $(BUILD_DIR) $(TAR_OPTIONS) -
	touch $(LIBPNG_DIR)/.unpacked

$(LIBPNG_DIR)/.configured: $(LIBPNG_DIR)/.unpacked
	(cd $(LIBPNG_DIR); rm -rf config.cache; \
		$(TARGET_CONFIGURE_OPTS) CC_FOR_BUILD="$(HOSTCC)" \
		CFLAGS="$(TARGET_CFLAGS)" \
		./configure \
		ac_cv_func_memcmp_working=yes \
		ac_cv_have_decl_malloc=yes \
		gl_cv_func_malloc_0_nonnull=yes \
		ac_cv_func_malloc_0_nonnull=yes \
		ac_cv_func_calloc_0_nonnull=yes \
		ac_cv_func_realloc_0_nonnull=yes \
		--target=$(GNU_TARGET_NAME) \
		--host=$(GNU_TARGET_NAME) \
		--build=$(GNU_HOST_NAME) \
		--prefix=$(STAGING_DIR) \
		--exec_prefix=$(STAGING_DIR) \
		--libdir=$(STAGING_DIR)/lib \
		--includedir=$(STAGING_DIR)/include \
		--without-libpng-compat \
	);
	touch $(LIBPNG_DIR)/.configured

$(LIBPNG_DIR)/.compiled: $(LIBPNG_DIR)/.configured
	$(MAKE) -C $(LIBPNG_DIR)
	touch $(LIBPNG_DIR)/.compiled

$(STAGING_DIR)/lib/libpng.so: $(LIBPNG_DIR)/.compiled
	$(MAKE) prefix=$(STAGING_DIR) \
	    exec_prefix=$(STAGING_DIR) \
	    bindir=$(STAGING_DIR)/bin \
	    sbindir=$(STAGING_DIR)/sbin \
	    libexecdir=$(STAGING_DIR)/libexec \
	    datadir=$(STAGING_DIR)/share \
	    sysconfdir=$(STAGING_DIR)/etc \
	    sharedstatedir=$(STAGING_DIR)/com \
	    localstatedir=$(STAGING_DIR)/var \
	    libdir=$(STAGING_DIR)/lib \
	    includedir=$(STAGING_DIR)/include \
	    oldincludedir=$(STAGING_DIR)/include \
	    infodir=$(STAGING_DIR)/info \
	    mandir=$(STAGING_DIR)/man \
	    -C $(LIBPNG_DIR) install;
	touch -c $(STAGING_DIR)/lib/libpng.so

$(TARGET_DIR)/usr/lib/libpng.so: $(STAGING_DIR)/lib/libpng.so
	cp -dpf $(STAGING_DIR)/lib/libpng*.so* $(TARGET_DIR)/usr/lib/
	-$(STRIP) --strip-unneeded $(TARGET_DIR)/usr/lib/libpng.so

png libpng: uclibc zlib $(TARGET_DIR)/usr/lib/libpng.so

libpng-clean:
	-$(MAKE) -C $(LIBPNG_DIR) clean

libpng-dirclean:
	rm -rf $(LIBPNG_DIR)

#############################################################
#
# Toplevel Makefile options
#
#############################################################
ifeq ($(strip $(BR2_PACKAGE_LIBPNG)),y)
TARGETS+=libpng
endif