# libpng/cfg - "Build" settings for package

#---------------------------------------------------------------------

[technotes]

1. As of Fall 2017,  updates for this package are made  only under two
conditions:

(a) A corresponding "apng" patch is available
(b) The updates  won't break our own existing  "libpng" patches  in an
    uncorrectable manner

#---------------------------------------------------------------------

2. Presently,  this package is based on "libpng" 1.6.37.  The standard
version of "libpng"  1.6.37 omits some legacy functions  and/or access
to  some  internal functions,  and this breaks various programs.  This
distro's  version of  the package restores the following functions and
/or access to the functions:

      png_check_sig
      png_read_data
      png_set_dither
      png_set_gray_1_2_4_to_8

This  package  also patches  "png.h"  to  make it  include <zlib.h> as
this is needed by some legacy packages.

This package shouldn't be updated unless the associated patches can be
made to work with newer releases.

#---------------------------------------------------------------------

[buildtimes]

00.00 hours (or 000.28 minutes) - Dell Inspiron 6400 2.0 GHz Intel Duo
                                  7200 2GB RAM
00.01 hours (or 000.40 minutes) - ThinkPad E540 i7 4x2 16GB RAM
00.01 hours (or 000.53 minutes) - HP EliteBook 8560w 32GB RAM
00.02 hours (or 001.45 minutes) - Compaq 1.7 GHz Intel Pentium 4 512MB
                                  RAM

#---------------------------------------------------------------------

[settings]
build    = default
license  = See "license.txt" under installed tree
tmpsize  = 12M

#---------------------------------------------------------------------

[depends]
actools
gawk
grep
sed
zlib

#---------------------------------------------------------------------

[configure]
MANBASE=$PKGDIR_PROD/man
mkdir -p $MANBASE

bash ./configure \
    --prefix=$PKGDIR_PROD          \
    --build=$LACARCHBUILD          \
    --host=$LACARCHHOST            \
    --disable-dependency-tracking  \
    --enable-shared=yes            \
    --enable-static=yes            \
    --mandir=$MANBASE              \
    --with-libpng-compat

#---------------------------------------------------------------------

[postbuild]
BINDIR=$PKGDIR_PROD/bin
DOCDIR=$PKGDIR_PROD/doc
LIBDIR=$PKGDIR_PROD/lib
mkdir -p $DOCDIR $LIBDIR

cp -p LICENSE $DOCDIR/license.txt

cd $BINDIR
ln -s libpng{,12}-config
ln -s libpng{,14}-config

cd $LIBDIR
ln -nsf libpng.so{,.3}

#---------------------------------------------------------------------

# Original URLs. These URLs were valid at one point, but may have died
# since then. If you download newer versions of tarballs [etc.], don't
# delete  the  original versions,  as you may not  be able  to replace
# them.

[urls]
url_debian  = http://packages.debian.org/unstable/source/libpng
url_home    = http://www.libpng.org/pub/png/libpng.html

url_lfs     = http://www.linuxfromscratch.org/blfs/view/stable/\
general/libpng.html

url_tarball = http://downloads.sourceforge.net/\
libpng/libpng-1.6.42.tar.xz

#---------------------------------------------------------------------

[history]
170327 Updated from 1.6.27 to 1.6.29
170827 Updated to 1.6.32
171205 Updated to 1.6.34
190416 Updated to 1.6.37
220915 Updated to 1.6.38
230105 Updated to 1.6.39
230625 Updated to 1.6.40
240129 Updated to 1.6.42