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# Desc:   libpng Build Data
# Author: Mihrtec LLC
# Date:   2016
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# png natively supports transpiling
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# Download location
WEBADDR  := https://sourceforge.net/projects/libpng/files/latest/download
WEBTARG  := libpng-latest.tar.gz
WEBINIT  := tar -xvf $(WEBTARG) && rm $(WEBTARG)
WEBINIT  += && mv libpng-*/* png/
# Instead of autogenning, just turn off zlib link checking during build
AUTOGEN := sed -i -e 's@zlibVersion=no@zlibVersion=yes@g' ./configure
# After configuration, alter the makefile
DFLT_INC  := -I. -I$(abspath $(LIBINC_DIR)) -I$(abspath $(LIBDL_DIR)/z)
CONFIGURE += --without-zlib
CONFIGURE += && sed -i -e 's@^DEFAULT_INCLUDES \= \-I\.@DEFAULT_INCLUDES = $(DFLT_INC)@g' ./Makefile
CONFIGURE += && sed -i -e 's@^LIBS \= \-lz@LIBS = -L$(abspath $(LIB_DIR))@g' ./Makefile
# Don't check
MKCMD   := make -k
# png can be built with zlib for efficiency
LINK_ORDER := z