Downloaded pixman-0.28.0 from official site

Created i586-mingw-ar:

#!/bin/bash
# ##############################################################################
# (c) Eric Lassauge - December 2012
# <lassauge {AT} users {DOT} sourceforge {DOT} net >
#
# ##############################################################################
#    This program is free software: you can redistribute it and/or modify
#    it under the terms of the GNU General Public License as published by
#    the Free Software Foundation, either version 3 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 General Public License for more details.
#
#    You should have received a copy of the GNU General Public License
#    along with this program.  If not, see <http://www.gnu.org/licenses/>
# ##############################################################################
# Complete script for MinGW ar wrapper from cygwin: change POSIX path to windows path
# Needs: cygpath

#Configure to where you installed MinGW
mingwbase=/cygdrive/d/MinGW
mingwroot=`cygpath -w ${mingwbase}`

dollarstar=""
# Parse the gcc flags to change all file pathes
while [ $# -ne 0 ]; do
	case "$1" in
	*)
		if [ -f "$1" ]
		then
			param=`cygpath -w $1`
			dollarstar="${dollarstar} ${param}"
		else
			dollarstar="${dollarstar} $1"
		fi
		;;
	esac
	shift
done

# remove spurious ^M
dollarstar=`echo "${dollarstar}" | sed -e 's/
//g'`
# echo "# Calling MinGW compiler: gcc ${dollarstar}"
# Add the path to mingw tools
export PATH=${mingwbase}/bin:$PATH
${mingwbase}/bin/ar ${dollarstar}

WARNING:
I had to update all "wrong" pkgconfig lib/*.pc files for the correct prefix!

Configure:
PKG_CONFIG_PATH=/cygdrive/d/MinGW/lib/pkgconfig ./configure --host=i586-mingw32 --disable-silent-rules  --with-sysroot=/cygdrive/d/MinGW --prefix=/cygdrive/d/MinGW --disable-shared