# Copyright 1999-2004 Gentoo Technologies, Inc.
# Distributed under the terms of the GNU General Public License v2

# ebuild by Stefan Briesenick <sbriesen@gmx.de>
# gcc3 patch found in a newsgroup (author unknown)
# shared patch by Stefan Briesenick <sbriesen@gmx.de>

DESCRIPTION="djbfft is an extremely fast library for floating-point convolution"
HOMEPAGE="http://cr.yp.to/djbfft.html"
SRC_URI="http://cr.yp.to/djbfft/${P}.tar.gz"

MY_PV="0.7.6"
MY_D="${D}usr"

SLOT="0"
LICENSE="as-is"
KEYWORDS="~x86 ~ppc ~sparc"  # perhaps many more, feel free to test!
IUSE="static"

# mask out everything, which is not suggested by the author (RTFM)!
ALLOWED_FLAGS="-fstack-protector -march -mcpu -pipe -mpreferred-stack-boundary -ffast-math"
strip-flags

if [ `use static` ]
then
    LIBPERMS="0644"
    LIBDJBFFT="libdjbfft.a"
else
    LIBPERMS="0755"
    LIBDJBFFT="libdjbfft.so.${MY_PV}"
fi

src_unpack() {
    unpack "${A}"
    cd "${S}" || die
    epatch "${FILESDIR}/${P}-gcc3.patch.gz"   || die
    epatch "${FILESDIR}/${P}-shared.patch.gz" || die
    if [ `use static` ]
    then
        echo "$CC $CFLAGS -O1 -fomit-frame-pointer -malign-double" > "conf-cc"
    else
        echo "$CC $CFLAGS -O1 -fomit-frame-pointer -malign-double -fPIC -DPIC" > "conf-cc"
    fi
    echo "$CC $LDFLAGS" > "conf-ld"
    echo "${MY_D}" > "conf-home"
    einfo "conf-cc: $(<conf-cc)"
}

src_compile() {
    emake LIBDJBFFT="$LIBDJBFFT" LIBPERMS="$LIBPERMS" || die
}

src_install() {
    make LIBDJBFFT="$LIBDJBFFT" setup check || die
    if [ ! `use static` ]
    then
        ln -snf "${LIBDJBFFT}" "${MY_D}/lib/libdjbfft.so"
        ln -snf "${LIBDJBFFT}" "${MY_D}/lib/libdjbfft.so.${MY_PV%%.*}"
    fi
    dodoc CHANGES README TODO VERSION
}