gentoo-x86/eclass/mysql.eclass

# Copyright 1999-2011 Gentoo Foundation
# Distributed under the terms of the GNU General Public License v2
# $Header: /var/cvsroot/gentoo-x86/eclass/mysql.eclass,v 1.165 2011/08/29 01:28:10 vapier Exp $

# @ECLASS: mysql.eclass
# @MAINTAINER:
# MySQL Team <mysql-bugs@gentoo.org>
# Luca Longinotti <chtekk@gentoo.org>
# Robin H. Johnson <robbat2@gentoo.org>
# @AUTHOR:
# Francesco Riosa (Retired) <vivo@gentoo.org>
# @BLURB: This eclass provides most of the functions for mysql ebuilds
# @DESCRIPTION:
# The mysql.eclass provides almost all the code to build the mysql ebuilds
# including the src_unpack, src_prepare, src_configure, src_compile,
# scr_install, pkg_preinst, pkg_postinst, pkg_config and pkg_postrm
# phase hooks.

WANT_AUTOCONF="latest"
WANT_AUTOMAKE="latest"

inherit eutils flag-o-matic gnuconfig autotools mysql_fx versionator toolchain-funcs

# Shorten the path because the socket path length must be shorter than 107 chars
# and we will run a mysql server during test phase
S="${WORKDIR}/mysql"

[[ "${MY_EXTRAS_VER}" == "latest" ]] && MY_EXTRAS_VER="20090228-0714Z"
if [[ "${MY_EXTRAS_VER}" == "live" ]]; then
        EGIT_PROJECT=mysql-extras
        EGIT_REPO_URI="git://git.overlays.gentoo.org/proj/mysql-extras.git"
        inherit git
fi

case "${EAPI:-0}" in
        2)
                EXPORT_FUNCTIONS pkg_setup \
                                        src_unpack src_prepare \
                                        src_configure src_compile \
                                        src_install \
                                        pkg_preinst pkg_postinst \
                                        pkg_config pkg_postrm
                IUSE_DEFAULT_ON='+'
                ;;
        0 | 1)
                EXPORT_FUNCTIONS pkg_setup \
                                        src_unpack \
                                        src_compile \
                                        src_install \
                                        pkg_preinst pkg_postinst \
                                        pkg_config pkg_postrm
                ;;
        *)
                die "Unsupported EAPI: ${EAPI}" ;;
esac


# @ECLASS-VARIABLE: MYSQL_PV_MAJOR
# @DESCRIPTION:
# Upstream MySQL considers the first two parts of the version number to be the
# major version. Upgrades that change major version should always run
# mysql_upgrade.
MYSQL_PV_MAJOR="$(get_version_component_range 1-2 ${PV})"

# Cluster is a special case...
if [[ "${PN}" == "mysql-cluster" ]]; then
        case $PV in
                6.1*|7.0*|7.1*) MYSQL_PV_MAJOR=5.1 ;;
        esac
fi


# @ECLASS-VARIABLE: MYSQL_VERSION_ID
# @DESCRIPTION:
# MYSQL_VERSION_ID will be:
# major * 10e6 + minor * 10e4 + micro * 10e2 + gentoo revision number, all [0..99]
# This is an important part, because many of the choices the MySQL ebuild will do
# depend on this variable.
# In particular, the code below transforms a $PVR like "5.0.18-r3" in "5001803"
# We also strip off upstream's trailing letter that they use to respin tarballs

MYSQL_VERSION_ID=""
tpv="${PV%[a-z]}"
tpv=( ${tpv//[-._]/ } ) ; tpv[3]="${PVR:${#PV}}" ; tpv[3]="${tpv[3]##*-r}"
for vatom in 0 1 2 3 ; do
        # pad to length 2
        tpv[${vatom}]="00${tpv[${vatom}]}"
        MYSQL_VERSION_ID="${MYSQL_VERSION_ID}${tpv[${vatom}]:0-2}"
done
# strip leading "0" (otherwise it's considered an octal number by BASH)
MYSQL_VERSION_ID=${MYSQL_VERSION_ID##"0"}

# @ECLASS-VARIABLE: MYSQL_COMMUNITY_FEATURES
# @DESCRIPTION:
# Specifiy if community features are available. Possible values are 1 (yes)
# and 0 (no).
# Community features are available in mysql-community
# AND in the re-merged mysql-5.0.82 and newer
if [ "${PN}" == "mysql-community" -o "${PN}" == "mariadb" ]; then
        MYSQL_COMMUNITY_FEATURES=1
elif [ "${PV#5.0}" != "${PV}" ] && mysql_version_is_at_least "5.0.82"; then
        MYSQL_COMMUNITY_FEATURES=1
elif [ "${PV#5.1}" != "${PV}" ] && mysql_version_is_at_least "5.1.28"; then
        MYSQL_COMMUNITY_FEATURES=1
elif [ "${PV#5.4}" != "${PV}" ] ; then
        MYSQL_COMMUNITY_FEATURES=1
elif [ "${PV#5.5}" != "${PV}" ] ; then
        MYSQL_COMMUNITY_FEATURES=1
elif [ "${PV#6}" != "${PV}" ] ; then
        MYSQL_COMMUNITY_FEATURES=1
elif [ "${PV#7}" != "${PV}" ] ; then
        MYSQL_COMMUNITY_FEATURES=1
else
        MYSQL_COMMUNITY_FEATURES=0
fi

# @ECLASS-VARIABLE: XTRADB_VER
# @DESCRIPTION:
# Version of the XTRADB storage engine
XTRADB_VER="${XTRADB_VER}"

# @ECLASS-VARIABLE: PERCONA_VER
# @DESCRIPTION:
# Designation by PERCONA for a MySQL version to apply an XTRADB release
PERCONA_VER="${PERCONA_VER}"

# Be warned, *DEPEND are version-dependant
# These are used for both runtime and compiletime
DEPEND="ssl? ( >=dev-libs/openssl-0.9.6d )
                userland_GNU? ( sys-process/procps )
                >=sys-apps/sed-4
                >=sys-apps/texinfo-4.7-r1
                >=sys-libs/readline-4.1
                >=sys-libs/zlib-1.2.3"

[[ "${PN}" == "mariadb" ]] \
&& DEPEND="${DEPEND} libevent? ( >=dev-libs/libevent-1.4 )"

# Having different flavours at the same time is not a good idea
for i in "mysql" "mysql-community" "mysql-cluster" "mariadb" ; do
        [[ "${i}" == ${PN} ]] ||
        DEPEND="${DEPEND} !dev-db/${i}"
done

# prefix: first need to implement something for #196294
RDEPEND="${DEPEND}
                !minimal? ( !prefix? ( dev-db/mysql-init-scripts ) )
                selinux? ( sec-policy/selinux-mysql )"

DEPEND="${DEPEND}
                virtual/yacc"

if [ "${EAPI:-0}" = "2" ]; then
        DEPEND="${DEPEND} static? ( || ( sys-libs/ncurses[static-libs] <=sys-libs/ncurses-5.7-r3 ) )"
fi

# compile-time-only
mysql_version_is_at_least "5.1" \
|| DEPEND="${DEPEND} berkdb? ( sys-apps/ed )"

# compile-time-only
mysql_version_is_at_least "5.1.12" \
&& DEPEND="${DEPEND} >=dev-util/cmake-2.4.3"

[[ "${PN}" == "mariadb" ]] \
&& mysql_version_is_at_least "5.2" \
&& DEPEND="${DEPEND} oqgraph? ( >=dev-libs/boost-1.40.0 )"
#SphinxSE is included but is not available in 5.2.4 due to a missing plug.in file
#       sphinx? ( app-misc/sphinx )"

# dev-perl/DBD-mysql is needed by some scripts installed by MySQL
PDEPEND="perl? ( >=dev-perl/DBD-mysql-2.9004 )"

# For other stuff to bring us in
PDEPEND="${PDEPEND} =virtual/mysql-${MYSQL_PV_MAJOR}"

# Work out the default SERVER_URI correctly
if [ -z "${SERVER_URI}" ]; then
        [ -z "${MY_PV}" ] && MY_PV="${PV//_/-}"
        if [ "${PN}" == "mariadb" ]; then
                MARIA_FULL_PV="$(replace_version_separator 3 '-' ${PV})"
                MARIA_FULL_P="${PN}-${MARIA_FULL_PV}"
                SERVER_URI="
                http://ftp.osuosl.org/pub/mariadb/${MARIA_FULL_P}/kvm-tarbake-jaunty-x86/${MARIA_FULL_P}.tar.gz
                http://ftp.rediris.es/mirror/MariaDB/${MARIA_FULL_P}/kvm-tarbake-jaunty-x86/${MARIA_FULL_P}.tar.gz
                http://maria.llarian.net/download/${MARIA_FULL_P}/kvm-tarbake-jaunty-x86/${MARIA_FULL_P}.tar.gz
                http://launchpad.net/maria/${MYSQL_PV_MAJOR}/ongoing/+download/${MARIA_FULL_P}.tar.gz
                http://mirrors.fe.up.pt/pub/${PN}/${MARIA_FULL_P}/kvm-tarbake-jaunty-x86/${MARIA_FULL_P}.tar.gz
                http://ftp-stud.hs-esslingen.de/pub/Mirrors/${PN}/${MARIA_FULL_P}/kvm-tarbake-jaunty-x86/${MARIA_FULL_P}.tar.gz
                "
        # The community and cluster builds are on the mirrors
        elif [[ "${MYSQL_COMMUNITY_FEATURES}" == "1" || ${PN} == "mysql-cluster" ]] ; then
                if [[ "${PN}" == "mysql-cluster" ]] ; then
                        URI_DIR="MySQL-Cluster"
                        URI_FILE="mysql-cluster-gpl"
                else
                        URI_DIR="MySQL"
                        URI_FILE="mysql"
                fi
                URI_A="${URI_FILE}-${MY_PV}.tar.gz"
                MIRROR_PV=$(get_version_component_range 1-2 ${PV})
                # Recently upstream switched to an archive site, and not on mirrors
                SERVER_URI="http://downloads.mysql.com/archives/${URI_FILE}-${MIRROR_PV}/${URI_A}
                                        mirror://mysql/Downloads/${URI_DIR}-${PV%.*}/${URI_A}"
        # The (old) enterprise source is on the primary site only
        elif [ "${PN}" == "mysql" ]; then
                SERVER_URI="ftp://ftp.mysql.com/pub/mysql/src/mysql-${MY_PV}.tar.gz"
        fi
fi

# Define correct SRC_URIs
SRC_URI="${SERVER_URI}"

# Gentoo patches to MySQL
[[ ${MY_EXTRAS_VER} != live ]] \
&& SRC_URI="${SRC_URI}
                mirror://gentoo/mysql-extras-${MY_EXTRAS_VER}.tar.bz2
                http://g3nt8.org/patches/mysql-extras-${MY_EXTRAS_VER}.tar.bz2
                http://dev.gentoo.org/~robbat2/distfiles/mysql-extras-${MY_EXTRAS_VER}.tar.bz2"

DESCRIPTION="A fast, multi-threaded, multi-user SQL database server."
HOMEPAGE="http://www.mysql.com/"
if [[ "${PN}" == "mariadb" ]]; then
        HOMEPAGE="http://askmonty.org/"
        DESCRIPTION="MariaDB is a MySQL fork with 3rd-party patches and additional storage engines merged."
fi
if [[ "${PN}" == "mysql-community" ]]; then
        DESCRIPTION="${DESCRIPTION} (obsolete, move to dev-db/mysql)"
fi
LICENSE="GPL-2"
SLOT="0"
IUSE="big-tables debug embedded minimal ${IUSE_DEFAULT_ON}perl selinux ssl static test"

mysql_version_is_at_least "4.1" \
&& IUSE="${IUSE} latin1"

if mysql_version_is_at_least "4.1.3" ; then
        IUSE="${IUSE} extraengine"
        if [[ "${PN}" != "mysql-cluster" ]] ; then
                IUSE="${IUSE} cluster"
        fi
fi

mysql_version_is_at_least "5.0" \
|| IUSE="${IUSE} raid"

mysql_version_is_at_least "5.0.18" \
&& IUSE="${IUSE} max-idx-128"

mysql_version_is_at_least "5.1" \
|| IUSE="${IUSE} berkdb"

[ "${MYSQL_COMMUNITY_FEATURES}" == "1" ] \
&& IUSE="${IUSE} ${IUSE_DEFAULT_ON}community profiling"

[[ "${PN}" == "mariadb" ]] \
&& IUSE="${IUSE} libevent"

[[ "${PN}" == "mariadb" ]] \
&& mysql_version_is_at_least "5.2" \
&& IUSE="${IUSE} oqgraph"
#SphinxSE is included but is not available in 5.2.4 due to a missing plug.in file
#&& IUSE="${IUSE} oqgraph sphinx"

# MariaDB has integrated PBXT
# PBXT_VERSION means that we have a PBXT patch for this PV
# PBXT was only introduced after 5.1.12
pbxt_patch_available() {
        [[ "${PN}" != "mariadb" ]] \
        && mysql_version_is_at_least "5.1.12" \
        && [[ -n "${PBXT_VERSION}" ]]
        return $?
}

pbxt_available() {
        pbxt_patch_available || [[ "${PN}" == "mariadb" ]]
        return $?
}

# Get the percona tarball if XTRADB_VER and PERCONA_VER are both set
# MariaDB has integrated XtraDB
# XTRADB_VERS means that we have a XTRADB patch for this PV
# XTRADB was only introduced after 5.1.26
xtradb_patch_available() {
        [[ "${PN}" != "mariadb" ]] \
        && mysql_version_is_at_least "5.1.26" \
        && [[ -n "${XTRADB_VER}" && -n "${PERCONA_VER}" ]]
        return $?
}


pbxt_patch_available \
&& PBXT_P="pbxt-${PBXT_VERSION}" \
&& PBXT_SRC_URI="http://www.primebase.org/download/${PBXT_P}.tar.gz mirror://sourceforge/pbxt/${PBXT_P}.tar.gz" \
&& SRC_URI="${SRC_URI} pbxt? ( ${PBXT_SRC_URI} )" \

# PBXT_NEWSTYLE means pbxt is in storage/ and gets enabled as other plugins
# vs. built outside the dir
pbxt_available \
&& IUSE="${IUSE} pbxt" \
&& mysql_version_is_at_least "5.1.40" \
&& PBXT_NEWSTYLE=1

xtradb_patch_available \
&& XTRADB_P="percona-xtradb-${XTRADB_VER}" \
&& XTRADB_SRC_URI_COMMON="${PERCONA_VER}/source/${XTRADB_P}.tar.gz" \
&& XTRADB_SRC_B1="http://www.percona.com/" \
&& XTRADB_SRC_B2="${XTRADB_SRC_B1}/percona-builds/" \
&& XTRADB_SRC_URI1="${XTRADB_SRC_B2}/Percona-Server/Percona-Server-${XTRADB_SRC_URI_COMMON}" \
&& XTRADB_SRC_URI2="${XTRADB_SRC_B2}/xtradb/${XTRADB_SRC_URI_COMMON}" \
&& XTRADB_SRC_URI3="${XTRADB_SRC_B1}/${PN}/xtradb/${XTRADB_SRC_URI_COMMON}" \
&& SRC_URI="${SRC_URI} xtradb? ( ${XTRADB_SRC_URI1} ${XTRADB_SRC_URI2} ${XTRADB_SRC_URI3} )" \
&& IUSE="${IUSE} xtradb"

#
# HELPER FUNCTIONS:
#

# @FUNCTION: mysql_disable_test
# @DESCRIPTION:
# Helper function to disable specific tests.
mysql_disable_test() {
        local rawtestname testname testsuite reason mysql_disable_file
        rawtestname="${1}" ; shift
        reason="${@}"
        ewarn "test '${rawtestname}' disabled: '${reason}'"

        testsuite="${rawtestname/.*}"
        testname="${rawtestname/*.}"
        mysql_disable_file="${S}/mysql-test/t/disabled.def"
        #einfo "rawtestname=${rawtestname} testname=${testname} testsuite=${testsuite}"
        echo ${testname} : ${reason} >> "${mysql_disable_file}"

        # ${S}/mysql-tests/t/disabled.def
        #
        # ${S}/mysql-tests/suite/federated/disabled.def
        #
        # ${S}/mysql-tests/suite/jp/t/disabled.def
        # ${S}/mysql-tests/suite/ndb/t/disabled.def
        # ${S}/mysql-tests/suite/rpl/t/disabled.def
        # ${S}/mysql-tests/suite/parts/t/disabled.def
        # ${S}/mysql-tests/suite/rpl_ndb/t/disabled.def
        # ${S}/mysql-tests/suite/ndb_team/t/disabled.def
        # ${S}/mysql-tests/suite/binlog/t/disabled.def
        # ${S}/mysql-tests/suite/innodb/t/disabled.def
        if [ -n "${testsuite}" ]; then
                for mysql_disable_file in \
                        ${S}/mysql-test/suite/${testsuite}/disabled.def  \
                        ${S}/mysql-test/suite/${testsuite}/t/disabled.def  \
                        FAILED ; do
                        [ -f "${mysql_disable_file}" ] && break
                done
                if [ "${mysql_disabled_file}" != "FAILED" ]; then
                        echo "${testname} : ${reason}" >> "${mysql_disable_file}"
                else
                        ewarn "Could not find testsuite disabled.def location for ${rawtestname}"
                fi
        fi
}

# @FUNCTION: mysql_init_vars
# @DESCRIPTION:
# void mysql_init_vars()
# Initialize global variables
# 2005-11-19 <vivo@gentoo.org>
mysql_init_vars() {
        MY_SHAREDSTATEDIR=${MY_SHAREDSTATEDIR="/usr/share/mysql"}
        MY_SYSCONFDIR=${MY_SYSCONFDIR="/etc/mysql"}
        MY_LIBDIR=${MY_LIBDIR="/usr/$(get_libdir)/mysql"}
        MY_LOCALSTATEDIR=${MY_LOCALSTATEDIR="/var/lib/mysql"}
        MY_LOGDIR=${MY_LOGDIR="/var/log/mysql"}
        MY_INCLUDEDIR=${MY_INCLUDEDIR="/usr/include/mysql"}

        if [[ -z "${MY_DATADIR}" ]] ; then
                MY_DATADIR=""
                if [[ -f "${MY_SYSCONFDIR}/my.cnf" ]] ; then
                        MY_DATADIR=`"my_print_defaults" mysqld 2>/dev/null \
                                | sed -ne '/datadir/s|^--datadir=||p' \
                                | tail -n1`
                        if [[ -z "${MY_DATADIR}" ]] ; then
                                MY_DATADIR=`grep ^datadir "${MY_SYSCONFDIR}/my.cnf" \
                                | sed -e 's/.*=\s*//' \
                                | tail -n1`
                        fi
                fi
                if [[ -z "${MY_DATADIR}" ]] ; then
                        MY_DATADIR="${MY_LOCALSTATEDIR}"
                        einfo "Using default MY_DATADIR"
                fi
                elog "MySQL MY_DATADIR is ${MY_DATADIR}"

                if [[ -z "${PREVIOUS_DATADIR}" ]] ; then
                        if [[ -e "${MY_DATADIR}" ]] ; then
                                # If you get this and you're wondering about it, see bug #207636
                                elog "MySQL datadir found in ${MY_DATADIR}"
                                elog "A new one will not be created."
                                PREVIOUS_DATADIR="yes"
                        else
                                PREVIOUS_DATADIR="no"
                        fi
                        export PREVIOUS_DATADIR
                fi
        else
                if [[ ${EBUILD_PHASE} == "config" ]]; then
                        local new_MY_DATADIR
                        new_MY_DATADIR=`"my_print_defaults" mysqld 2>/dev/null \
                                | sed -ne '/datadir/s|^--datadir=||p' \
                                | tail -n1`

                        if [[ ( -n "${new_MY_DATADIR}" ) && ( "${new_MY_DATADIR}" != "${MY_DATADIR}" ) ]]; then
                                ewarn "MySQL MY_DATADIR has changed"
                                ewarn "from ${MY_DATADIR}"
                                ewarn "to ${new_MY_DATADIR}"
                                MY_DATADIR="${new_MY_DATADIR}"
                        fi
                fi
        fi

        if [ "${MY_SOURCEDIR:-unset}" == "unset" ]; then
                MY_SOURCEDIR=${SERVER_URI##*/}
                MY_SOURCEDIR=${MY_SOURCEDIR%.tar*}
        fi

        export MY_SHAREDSTATEDIR MY_SYSCONFDIR
        export MY_LIBDIR MY_LOCALSTATEDIR MY_LOGDIR
        export MY_INCLUDEDIR MY_DATADIR MY_SOURCEDIR
}

configure_minimal() {
        # These are things we exclude from a minimal build, please
        # note that the server actually does get built and installed,
        # but we then delete it before packaging.
        local minimal_exclude_list="server embedded-server extra-tools innodb bench berkeley-db row-based-replication readline"

        for i in ${minimal_exclude_list} ; do
                myconf="${myconf} --without-${i}"
        done
        myconf="${myconf} --with-extra-charsets=none"
        myconf="${myconf} --enable-local-infile"

        if use static ; then
                myconf="${myconf} --with-client-ldflags=-all-static"
                myconf="${myconf} --disable-shared --with-pic"
        else
                myconf="${myconf} --enable-shared --enable-static"
        fi

        if mysql_version_is_at_least "4.1" && ! use latin1 ; then
                myconf="${myconf} --with-charset=utf8"
                myconf="${myconf} --with-collation=utf8_general_ci"
        else
                myconf="${myconf} --with-charset=latin1"
                myconf="${myconf} --with-collation=latin1_swedish_ci"
        fi
}

configure_common() {
        myconf="${myconf} $(use_with big-tables)"
        myconf="${myconf} --enable-local-infile"
        myconf="${myconf} --with-extra-charsets=all"
        myconf="${myconf} --with-mysqld-user=mysql"
        myconf="${myconf} --with-server"
        myconf="${myconf} --with-unix-socket-path=/var/run/mysqld/mysqld.sock"
        myconf="${myconf} --without-libwrap"

        if use static ; then
                myconf="${myconf} --with-mysqld-ldflags=-all-static"
                myconf="${myconf} --with-client-ldflags=-all-static"
                myconf="${myconf} --disable-shared --with-pic"
        else
                myconf="${myconf} --enable-shared --enable-static"
        fi

        if use debug ; then
                myconf="${myconf} --with-debug=full"
        else
                myconf="${myconf} --without-debug"
                mysql_version_is_at_least "4.1.3" \
                && ( use cluster || [[ "${PN}" == "mysql-cluster" ]] ) \
                && myconf="${myconf} --without-ndb-debug"
        fi

        if [ -n "${MYSQL_DEFAULT_CHARSET}" -a -n "${MYSQL_DEFAULT_COLLATION}" ]; then
                ewarn "You are using a custom charset of ${MYSQL_DEFAULT_CHARSET}"
                ewarn "and a collation of ${MYSQL_DEFAULT_COLLATION}."
                ewarn "You MUST file bugs without these variables set."
                myconf="${myconf} --with-charset=${MYSQL_DEFAULT_CHARSET}"
                myconf="${myconf} --with-collation=${MYSQL_DEFAULT_COLLATION}"
        elif mysql_version_is_at_least "4.1" && ! use latin1 ; then
                myconf="${myconf} --with-charset=utf8"
                myconf="${myconf} --with-collation=utf8_general_ci"
        else
                myconf="${myconf} --with-charset=latin1"
                myconf="${myconf} --with-collation=latin1_swedish_ci"
        fi

        if use embedded ; then
                myconf="${myconf} --with-embedded-privilege-control"
                myconf="${myconf} --with-embedded-server"
        else
                myconf="${myconf} --without-embedded-privilege-control"
                myconf="${myconf} --without-embedded-server"
        fi

}

configure_40_41_50() {
        myconf="${myconf} $(use_with perl bench)"
        myconf="${myconf} --enable-assembler"
        myconf="${myconf} --with-extra-tools"
        myconf="${myconf} --with-innodb"
        myconf="${myconf} --without-readline"
        myconf="${myconf} $(use_with ssl openssl)"
        mysql_version_is_at_least "5.0" || myconf="${myconf} $(use_with raid)"

        # --with-vio is not needed anymore, it's on by default and
        # has been removed from configure
        #  Apply to 4.x and 5.0.[0-3]
        if use ssl ; then
                 mysql_version_is_at_least "5.0.4" || myconf="${myconf} --with-vio"
        fi

        if mysql_version_is_at_least "5.0.60" ; then
                        if use berkdb ; then
                                elog "Berkeley DB support was disabled due to build failures"
                                elog "on multiple arches, go to a version earlier than 5.0.60"
                                elog "if you want it again. Gentoo bug #224067."
                        fi
                        myconf="${myconf} --without-berkeley-db"
        elif use berkdb ; then
                # The following fix is due to a bug with bdb on SPARC's. See:
                # http://www.geocrawler.com/mail/msg.php3?msg_id=4754814&list=8
                # It comes down to non-64-bit safety problems.
                if use alpha || use amd64 || use hppa || use mips || use sparc ; then
                        elog "Berkeley DB support was disabled due to compatibility issues on this arch"
                        myconf="${myconf} --without-berkeley-db"
                else
                        myconf="${myconf} --with-berkeley-db=./bdb"
                fi
        else
                myconf="${myconf} --without-berkeley-db"
        fi

        if mysql_version_is_at_least "4.1.3" ; then
                myconf="${myconf} --with-geometry"
                if [[ "${PN}" != "mysql-cluster" ]] ; then
                        myconf="${myconf} $(use_with cluster ndbcluster)"
                fi
        fi

        if mysql_version_is_at_least "4.1.3" && use extraengine ; then
                # http://dev.mysql.com/doc/mysql/en/archive-storage-engine.html
                myconf="${myconf} --with-archive-storage-engine"

                # http://dev.mysql.com/doc/mysql/en/csv-storage-engine.html
                myconf="${myconf} --with-csv-storage-engine"

                # http://dev.mysql.com/doc/mysql/en/blackhole-storage-engine.html
                myconf="${myconf} --with-blackhole-storage-engine"

                # http://dev.mysql.com/doc/mysql/en/federated-storage-engine.html
                # http://dev.mysql.com/doc/mysql/en/federated-description.html
                # http://dev.mysql.com/doc/mysql/en/federated-limitations.html
                if mysql_version_is_at_least "5.0.3" ; then
                        elog "Before using the Federated storage engine, please be sure to read"
                        elog "http://dev.mysql.com/doc/mysql/en/federated-limitations.html"
                        myconf="${myconf} --with-federated-storage-engine"
                fi
        fi

        if [ "${MYSQL_COMMUNITY_FEATURES}" == "1" ]; then
                myconf="${myconf} `use_enable community community-features`"
                if use community; then
                        myconf="${myconf} `use_enable profiling`"
                else
                        myconf="${myconf} --disable-profiling"
                fi
        fi

        mysql_version_is_at_least "5.0.18" \
        && use max-idx-128 \
        && myconf="${myconf} --with-max-indexes=128"
}

configure_51() {
        # TODO: !!!! readd --without-readline
        # the failure depend upon config/ac-macros/readline.m4 checking into
        # readline.h instead of history.h
        myconf="${myconf} $(use_with ssl ssl /usr)"
        myconf="${myconf} --enable-assembler"
        myconf="${myconf} --with-geometry"
        myconf="${myconf} --with-readline"
        myconf="${myconf} --with-zlib-dir=/usr/"
        myconf="${myconf} --without-pstack"
        myconf="${myconf} --with-plugindir=/usr/$(get_libdir)/mysql/plugin"

        # This is an explict die here, because if we just forcibly disable it, then the
        # user's data is not accessible.
        use max-idx-128 && die "Bug #336027: upstream has a corruption issue with max-idx-128 presently"
        #use max-idx-128 && myconf="${myconf} --with-max-indexes=128"
        if [ "${MYSQL_COMMUNITY_FEATURES}" == "1" ]; then
                myconf="${myconf} $(use_enable community community-features)"
                if use community; then
                        myconf="${myconf} $(use_enable profiling)"
                else
                        myconf="${myconf} --disable-profiling"
                fi
        fi

        # Scan for all available plugins
        local plugins_avail="$(
        LANG=C \
        find "${S}" \
                \( \
                -name 'plug.in' \
                -o -iname 'configure.in' \
                -o -iname 'configure.ac' \
                \) \
                -print0 \
        | xargs -0 sed -r -n \
                -e '/^MYSQL_STORAGE_ENGINE/{
                        s~MYSQL_STORAGE_ENGINE\([[:space:]]*\[?([-_a-z0-9]+)\]?.*,~\1 ~g ;
                        s~^([^ ]+).*~\1~gp;
                }' \
        | tr -s '\n' ' '
        )"

        # 5.1 introduces a new way to manage storage engines (plugins)
        # like configuration=none
        # This base set are required, and will always be statically built.
        local plugins_sta="csv myisam myisammrg heap"
        local plugins_dyn=""
        local plugins_dis="example ibmdb2i"

        # These aren't actually required by the base set, but are really useful:
        plugins_sta="${plugins_sta} archive blackhole"

        # default in 5.5.4
        if mysql_version_is_at_least "5.5.4" ; then
                plugins_sta="${plugins_sta} partition"
        fi
        # Now the extras
        if use extraengine ; then
                # like configuration=max-no-ndb, archive and example removed in 5.1.11
                # not added yet: ibmdb2i
                # Not supporting as examples: example,daemon_example,ftexample
                plugins_sta="${plugins_sta} partition"

                if [[ "${PN}" != "mariadb" ]] ; then
                        elog "Before using the Federated storage engine, please be sure to read"
                        elog "http://dev.mysql.com/doc/refman/5.1/en/federated-limitations.html"
                        plugins_dyn="${plugins_sta} federated"
                else
                        elog "MariaDB includes the FederatedX engine. Be sure to read"
                        elog "http://askmonty.org/wiki/index.php/Manual:FederatedX_storage_engine"
                        plugins_dyn="${plugins_sta} federatedx"
                fi
        else
                plugins_dis="${plugins_dis} partition federated"
        fi

        # Upstream specifically requests that InnoDB always be built:
        # - innobase, innodb_plugin
        # Build falcon if available for 6.x series.
        for i in innobase falcon ; do
                [ -e "${S}"/storage/${i} ] && plugins_sta="${plugins_sta} ${i}"
        done
        for i in innodb_plugin ; do
                [ -e "${S}"/storage/${i} ] && plugins_dyn="${plugins_dyn} ${i}"
        done

        # like configuration=max-no-ndb
        if ( use cluster || [[ "${PN}" == "mysql-cluster" ]] ) ; then
                plugins_sta="${plugins_sta} ndbcluster partition"
                plugins_dis="${plugins_dis//partition}"
                myconf="${myconf} --with-ndb-binlog"
        else
                plugins_dis="${plugins_dis} ndbcluster"
        fi

        if [[ "${PN}" == "mariadb" ]] ; then
                # In MariaDB, InnoDB is packaged in the xtradb directory, so it's not
                # caught above.
                # This is not optional, without it several upstream testcases fail.
                # Also strongly recommended by upstream.
                if [[ "${PV}" < "5.2.0" ]] ; then
                        myconf="${myconf} --with-maria-tmp-tables"
                        plugins_sta="${plugins_sta} maria"
                else
                        myconf="${myconf} --with-aria-tmp-tables"
                        plugins_sta="${plugins_sta} aria"
                fi

                [ -e "${S}"/storage/innobase ] || [ -e "${S}"/storage/xtradb ] ||
                        die "The ${P} package doesn't provide innobase nor xtradb"

                for i in innobase xtradb ; do
                        [ -e "${S}"/storage/${i} ] && plugins_sta="${plugins_sta} ${i}"
                done

                myconf="${myconf} $(use_with libevent)"

                if mysql_version_is_at_least "5.2" ; then
                        #This should include sphinx, but the 5.2.4 archive forgot the plug.in file
                        #for i in oqgraph sphinx ; do
                        for i in oqgraph ; do
                                use ${i} \
                                && plugins_dyn="${plugins_dyn} ${i}" \
                                || plugins_dis="${plugins_dis} ${i}"
                        done
                fi
        fi

        if pbxt_available && [[ "${PBXT_NEWSTYLE}" == "1" ]]; then
                use pbxt \
                && plugins_dyn="${plugins_dyn} pbxt" \
                || plugins_dis="${plugins_dis} pbxt"
        fi

        use static && \
        plugins_sta="${plugins_sta} ${plugins_dyn}" && \
        plugins_dyn=""

        einfo "Available plugins: ${plugins_avail}"
        einfo "Dynamic plugins: ${plugins_dyn}"
        einfo "Static plugins: ${plugins_sta}"
        einfo "Disabled plugins: ${plugins_dis}"

        # These are the static plugins
        myconf="${myconf} --with-plugins=${plugins_sta// /,}"
        # And the disabled ones
        for i in ${plugins_dis} ; do
                myconf="${myconf} --without-plugin-${i}"
        done
}

pbxt_src_configure() {
        mysql_init_vars

        pushd "${WORKDIR}/pbxt-${PBXT_VERSION}" &>/dev/null

        einfo "Reconfiguring dir '${PWD}'"
        eautoreconf

        local myconf=""
        myconf="${myconf} --with-mysql=${S} --libdir=/usr/$(get_libdir)"
        use debug && myconf="${myconf} --with-debug=full"
        econf ${myconf} || die "Problem configuring PBXT storage engine"
}

pbxt_src_compile() {

        # Be backwards compatible for now
        if [[ $EAPI != 2 ]]; then
                pbxt_src_configure
        fi
        # TODO: is it safe/needed to use emake here ?
        make || die "Problem making PBXT storage engine (${myconf})"

        popd
        # TODO: modify test suite for PBXT
}

pbxt_src_install() {
        pushd "${WORKDIR}/pbxt-${PBXT_VERSION}" &>/dev/null
                emake install DESTDIR="${D}" || die "Failed to install PBXT"
        popd
}

#
# EBUILD FUNCTIONS
#
# @FUNCTION: mysql_pkg_setup
# @DESCRIPTION:
# Perform some basic tests and tasks during pkg_setup phase:
#   die if FEATURES="test", USE="-minimal" and not using FEATURES="userpriv"
#   check for conflicting use flags
#   create new user and group for mysql
#   warn about deprecated features
mysql_pkg_setup() {
        if has test ${FEATURES} ; then
                if ! use minimal ; then
                        if [[ $UID -eq 0 ]]; then
                                eerror "Testing with FEATURES=-userpriv is no longer supported by upstream. Tests MUST be run as non-root."
                        fi
                fi
        fi

        # bug 350844
        case "${EAPI:-0}" in
                0 | 1)
                        if use static && !built_with_use sys-libs/ncurses static-libs; then
                                die "To build MySQL statically you need to enable static-libs for sys-libs/ncurses"
                        fi
                        ;;
        esac

        # Check for USE flag problems in pkg_setup
        if use static && use ssl ; then
                M="MySQL does not support being built statically with SSL support enabled!"
                eerror "${M}"
                die "${M}"
        fi

        if mysql_version_is_at_least "5.1.51" \
           && ! mysql_version_is_at_least "5.2" \
           && use debug ; then
           # Also in package.use.mask
           die "Bug #344885: Upstream has broken USE=debug for 5.1 series >=5.1.51"
        fi

        if ! mysql_version_is_at_least "5.0" \
        && use raid \
        && use static ; then
                eerror "USE flags 'raid' and 'static' conflict, you cannot build MySQL statically"
                eerror "with RAID support enabled."
                die "USE flags 'raid' and 'static' conflict!"
        fi

        if mysql_version_is_at_least "4.1.3" \
        && ( use cluster || use extraengine || use embedded ) \
        && use minimal ; then
                M="USE flags 'cluster', 'extraengine', 'embedded' conflict with 'minimal' USE flag!"
                eerror "${M}"
                die "${M}"
        fi

        if mysql_version_is_at_least "5.1" \
        && xtradb_patch_available \
        && use xtradb \
        && use embedded ; then
                M="USE flags 'xtradb' and 'embedded' conflict and cause build failures"
                eerror "${M}"
                die "${M}"
        fi

        # Bug #290570, 284946, 307251
        # Upstream changes made us need a fairly new GCC4.
        # But only for 5.0.8[3-6]!
        if mysql_version_is_at_least "5.0.83"  && ! mysql_version_is_at_least 5.0.87 ; then
                GCC_VER=$(gcc-version)
                case ${GCC_VER} in
                        2*|3*|4.0|4.1|4.2)
                        eerror "Some releases of MySQL required a very new GCC, and then"
                        eerror "later release relaxed that requirement again. Either pick a"
                        eerror "MySQL >=5.0.87, or use a newer GCC."
                        die "Active GCC too old!" ;;
                esac
        fi

        # This should come after all of the die statements
        enewgroup mysql 60 || die "problem adding 'mysql' group"
        enewuser mysql 60 -1 /dev/null mysql || die "problem adding 'mysql' user"

        mysql_check_version_range "4.0 to 5.0.99.99" \
        && use berkdb \
        && elog "Berkeley DB support is deprecated and will be removed in future versions!"

        if [ "${PN}" != "mysql-cluster" ] && use cluster; then
                ewarn "Upstream has noted that the NDB cluster support in the 5.0 and"
                ewarn "5.1 series should NOT be put into production. In the near"
                ewarn "future, it will be disabled from building."
                ewarn ""
                ewarn "If you need NDB support, you should instead move to the new"
                ewarn "mysql-cluster package that represents that upstream NDB"
                ewarn "development."
        fi
}

# @FUNCTION: mysql_src_unpack
# @DESCRIPTION:
# Unpack the source code and call mysql_src_prepare for EAPI < 2.
mysql_src_unpack() {
        # Initialize the proper variables first
        mysql_init_vars

        unpack ${A}
        # Grab the patches
        [[ "${MY_EXTRAS_VER}" == "live" ]] && S="${WORKDIR}/mysql-extras" git_src_unpack

        mv -f "${WORKDIR}/${MY_SOURCEDIR}" "${S}"

        # Be backwards compatible for now
        case ${EAPI:-0} in
                2) : ;;
                0 | 1) mysql_src_prepare ;;
        esac
}

# @FUNCTION: mysql_src_prepare
# @DESCRIPTION:
# Apply patches to the source code and remove unneeded bundled libs.
mysql_src_prepare() {
        cd "${S}"

        # Apply the patches for this MySQL version
        EPATCH_SUFFIX="patch"
        mkdir -p "${EPATCH_SOURCE}" || die "Unable to create epatch directory"
        # Clean out old items
        rm -f "${EPATCH_SOURCE}"/*
        # Now link in right patches
        mysql_mv_patches
        # And apply
        epatch

        # last -fPIC fixup, per bug #305873
        i="${S}"/storage/innodb_plugin/plug.in
        [ -f "${i}" ] && sed -i -e '/CFLAGS/s,-prefer-non-pic,,g' "${i}"

        # Additional checks, remove bundled zlib (Cluster needs this, for static
        # memory management in zlib, leave available for Cluster)
        if [[ "${PN}" != "mysql-cluster" ]] ; then
                rm -f "${S}/zlib/"*.[ch]
                sed -i -e "s/zlib\/Makefile dnl/dnl zlib\/Makefile/" "${S}/configure.in"
        fi
        rm -f "scripts/mysqlbug"

        # Make charsets install in the right place
        find . -name 'Makefile.am' \
                -exec sed --in-place -e 's!$(pkgdatadir)!'${MY_SHAREDSTATEDIR}'!g' {} \;

        if mysql_version_is_at_least "4.1" ; then
                # Remove what needs to be recreated, so we're sure it's actually done
                einfo "Cleaning up old buildscript files"
                find . -name Makefile \
                        -o -name Makefile.in \
                        -o -name configure \
                        -exec rm -f {} \;
                rm -f "ltmain.sh"
                rm -f "scripts/mysqlbug"
        fi

        local rebuilddirlist d

        if xtradb_patch_available && use xtradb ; then
                einfo "Adding storage engine: Percona XtraDB (replacing InnoDB)"
                pushd "${S}"/storage >/dev/null
                i="innobase"
                o="${WORKDIR}/storage-${i}.mysql-upstream"
                # Have we been here already?
                [ -d "${o}" ] && rm -f "${i}"
                # Or maybe we haven't
                [ -d "${i}" -a ! -d "${o}" ] && mv "${i}" "${o}"
                cp -ral "${WORKDIR}/${XTRADB_P}" "${i}"
                popd >/dev/null
        fi

        if pbxt_patch_available && [[ "${PBXT_NEWSTYLE}" == "1" ]] && use pbxt ; then
                einfo "Adding storage engine: PBXT"
                pushd "${S}"/storage >/dev/null
                i='pbxt'
                [ -d "${i}" ] && rm -rf "${i}"
                cp -ral "${WORKDIR}/${PBXT_P}" "${i}"
                popd >/dev/null
        fi

        if mysql_version_is_at_least "5.1.12" ; then
                rebuilddirlist="."
                # This does not seem to be needed presently. robbat2 2010/02/23
                #einfo "Updating innobase cmake"
                ## TODO: check this with a cmake expert
                #cmake \
                #       -DCMAKE_C_COMPILER=$(type -P $(tc-getCC)) \
                #       -DCMAKE_CXX_COMPILER=$(type -P $(tc-getCXX)) \
                #       "storage/innobase"
        else
                rebuilddirlist=". innobase"
        fi

        for d in ${rebuilddirlist} ; do
                einfo "Reconfiguring dir '${d}'"
                pushd "${d}" &>/dev/null
                eautoreconf
                popd &>/dev/null
        done

        if mysql_check_version_range "4.1 to 5.0.99.99" \
        && use berkdb ; then
                einfo "Fixing up berkdb buildsystem"
                [[ -w "bdb/dist/ltmain.sh" ]] && cp -f "ltmain.sh" "bdb/dist/ltmain.sh"
                cp -f "/usr/share/aclocal/libtool.m4" "bdb/dist/aclocal/libtool.ac" \
                || die "Could not copy libtool.m4 to bdb/dist/"
                #These files exist only with libtool-2*, and need to be included.
                if [ -f '/usr/share/aclocal/ltsugar.m4' ]; then
                        cat "/usr/share/aclocal/ltsugar.m4" >>  "bdb/dist/aclocal/libtool.ac"
                        cat "/usr/share/aclocal/ltversion.m4" >>  "bdb/dist/aclocal/libtool.ac"
                        cat "/usr/share/aclocal/lt~obsolete.m4" >>  "bdb/dist/aclocal/libtool.ac"
                        cat "/usr/share/aclocal/ltoptions.m4" >>  "bdb/dist/aclocal/libtool.ac"
                fi
                pushd "bdb/dist" &>/dev/null
                sh s_all \
                || die "Failed bdb reconfigure"
                popd &>/dev/null
        fi
}

# @FUNCTION: mysql_src_configure
# @DESCRIPTION:
# Configure mysql to build the code for Gentoo respecting the use flags.
mysql_src_configure() {
        # Make sure the vars are correctly initialized
        mysql_init_vars

        # $myconf is modified by the configure_* functions
        local myconf=""

        if use minimal ; then
                configure_minimal
        else
                configure_common
                if mysql_version_is_at_least "5.1.10" ; then
                        configure_51
                else
                        configure_40_41_50
                fi
        fi

        # Bug #114895, bug #110149
        filter-flags "-O" "-O[01]"

        # glib-2.3.2_pre fix, bug #16496
        append-flags "-DHAVE_ERRNO_AS_DEFINE=1"

        # As discovered by bug #246652, doing a double-level of SSP causes NDB to
        # fail badly during cluster startup.
        if [[ $(gcc-major-version) -lt 4 ]]; then
                filter-flags "-fstack-protector-all"
        fi

        CXXFLAGS="${CXXFLAGS} -fno-exceptions -fno-strict-aliasing"
        CXXFLAGS="${CXXFLAGS} -felide-constructors -fno-rtti"
        mysql_version_is_at_least "5.0" \
        && CXXFLAGS="${CXXFLAGS} -fno-implicit-templates"
        export CXXFLAGS

        # bug #283926, with GCC4.4, this is required to get correct behavior.
        append-flags -fno-strict-aliasing

        # bug #335185, #335995, with >= GCC4.3.3 on x86 only, omit-frame-pointer
        # causes a mis-compile.
        # Upstream bugs:
        # http://gcc.gnu.org/bugzilla/show_bug.cgi?id=38562
        # http://bugs.mysql.com/bug.php?id=45205
        use x86 && version_is_at_least "4.3.3" "$(gcc-fullversion)" && \
                append-flags -fno-omit-frame-pointer && \
                filter-flags -fomit-frame-pointer

        econf \
                --libexecdir="/usr/sbin" \
                --sysconfdir="${MY_SYSCONFDIR}" \
                --localstatedir="${MY_LOCALSTATEDIR}" \
                --sharedstatedir="${MY_SHAREDSTATEDIR}" \
                --libdir="${MY_LIBDIR}" \
                --includedir="${MY_INCLUDEDIR}" \
                --with-low-memory \
                --with-client-ldflags=-lstdc++ \
                --enable-thread-safe-client \
                --with-comment="Gentoo Linux ${PF}" \
                --without-docs \
                --with-LIBDIR="$(get_libdir)" \
                ${myconf} || die "econf failed"

        # TODO: Move this before autoreconf !!!
        find . -type f -name Makefile -print0 \
        | xargs -0 -n100 sed -i \
        -e 's|^pkglibdir *= *$(libdir)/mysql|pkglibdir = $(libdir)|;s|^pkgincludedir *= *$(includedir)/mysql|pkgincludedir = $(includedir)|'

        if [[ $EAPI == 2 ]] && [[ "${PBXT_NEWSTYLE}" != "1" ]]; then
                pbxt_patch_available && use pbxt && pbxt_src_configure
        fi
}

# @FUNCTION: mysql_src_compile
# @DESCRIPTION:
# Compile the mysql code.
mysql_src_compile() {
        # Be backwards compatible for now
        case ${EAPI:-0} in
                2) : ;;
                0 | 1) mysql_src_configure ;;
        esac

        emake || die "emake failed"

        if [[ "${PBXT_NEWSTYLE}" != "1" ]]; then
                pbxt_patch_available && use pbxt && pbxt_src_compile
        fi
}

# @FUNCTION: mysql_src_install
# @DESCRIPTION:
# Install mysql.
mysql_src_install() {
        # Make sure the vars are correctly initialized
        mysql_init_vars

        emake install \
                DESTDIR="${D}" \
                benchdir_root="${MY_SHAREDSTATEDIR}" \
                testroot="${MY_SHAREDSTATEDIR}" \
                || die "emake install failed"

        if [[ "${PBXT_NEWSTYLE}" != "1" ]]; then
                pbxt_patch_available && use pbxt && pbxt_src_install
        fi

        # Convenience links
        einfo "Making Convenience links for mysqlcheck multi-call binary"
        dosym "/usr/bin/mysqlcheck" "/usr/bin/mysqlanalyze"
        dosym "/usr/bin/mysqlcheck" "/usr/bin/mysqlrepair"
        dosym "/usr/bin/mysqlcheck" "/usr/bin/mysqloptimize"

        # Various junk (my-*.cnf moved elsewhere)
        einfo "Removing duplicate /usr/share/mysql files"
        rm -Rf "${D}/usr/share/info"
        for removeme in  "mysql-log-rotate" mysql.server* \
                binary-configure* my-*.cnf mi_test_all*
        do
                rm -f "${D}"/${MY_SHAREDSTATEDIR}/${removeme}
        done

        # Clean up stuff for a minimal build
        if use minimal ; then
                einfo "Remove all extra content for minimal build"
                rm -Rf "${D}${MY_SHAREDSTATEDIR}"/{mysql-test,sql-bench}
                rm -f "${D}"/usr/bin/{mysql{_install_db,manager*,_secure_installation,_fix_privilege_tables,hotcopy,_convert_table_format,d_multi,_fix_extensions,_zap,_explain_log,_tableinfo,d_safe,_install,_waitpid,binlog,test},myisam*,isam*,pack_isam}
                rm -f "${D}/usr/sbin/mysqld"
                rm -f "${D}${MY_LIBDIR}"/lib{heap,merge,nisam,my{sys,strings,sqld,isammrg,isam},vio,dbug}.a
        fi

        # Unless they explicitly specific USE=test, then do not install the
        # testsuite. It DOES have a use to be installed, esp. when you want to do a
        # validation of your database configuration after tuning it.
        if use !test ; then
                rm -rf "${D}"/${MY_SHAREDSTATEDIR}/mysql-test
        fi

        # Configuration stuff
        case ${MYSQL_PV_MAJOR} in
                3*|4.0) mysql_mycnf_version="4.0" ;;
                4.[1-9]|5.0) mysql_mycnf_version="4.1" ;;
                5.[1-9]|6*|7*) mysql_mycnf_version="5.1" ;;
        esac
        einfo "Building default my.cnf (${mysql_mycnf_version})"
        insinto "${MY_SYSCONFDIR}"
        doins scripts/mysqlaccess.conf
        mycnf_src="my.cnf-${mysql_mycnf_version}"
        sed -e "s!@DATADIR@!${MY_DATADIR}!g" \
                "${FILESDIR}/${mycnf_src}" \
                > "${TMPDIR}/my.cnf.ok"
        if use latin1 ; then
                sed -i \
                        -e "/character-set/s|utf8|latin1|g" \
                        "${TMPDIR}/my.cnf.ok"
        fi
        newins "${TMPDIR}/my.cnf.ok" my.cnf

        # Minimal builds don't have the MySQL server
        if ! use minimal ; then
                einfo "Creating initial directories"
                # Empty directories ...
                diropts "-m0750"
                if [[ "${PREVIOUS_DATADIR}" != "yes" ]] ; then
                        dodir "${MY_DATADIR}"
                        keepdir "${MY_DATADIR}"
                        chown -R mysql:mysql "${D}/${MY_DATADIR}"
                fi

                diropts "-m0755"
                for folder in "${MY_LOGDIR}" "/var/run/mysqld" ; do
                        dodir "${folder}"
                        keepdir "${folder}"
                        chown -R mysql:mysql "${D}/${folder}"
                done
        fi

        # Docs
        einfo "Installing docs"
        for i in README ChangeLog EXCEPTIONS-CLIENT INSTALL-SOURCE ; do
                [[ -f "$i" ]] && dodoc "$i"
        done
        doinfo "${S}"/Docs/mysql.info

        # Minimal builds don't have the MySQL server
        if ! use minimal ; then
                einfo "Including support files and sample configurations"
                docinto "support-files"
                for script in \
                        "${S}"/support-files/my-*.cnf \
                        "${S}"/support-files/magic \
                        "${S}"/support-files/ndb-config-2-node.ini
                do
                        [[ -f "$script" ]] && dodoc "${script}"
                done

                docinto "scripts"
                for script in "${S}"/scripts/mysql* ; do
                        [[ -f "$script" ]] && [[ "${script%.sh}" == "${script}" ]] && dodoc "${script}"
                done

        fi

        mysql_lib_symlinks "${D}"
}

# @FUNCTION: mysql_pkg_preinst
# @DESCRIPTION:
# Create the user and groups for mysql - die if that fails.
mysql_pkg_preinst() {
        enewgroup mysql 60 || die "problem adding 'mysql' group"
        enewuser mysql 60 -1 /dev/null mysql || die "problem adding 'mysql' user"
}

# @FUNCTION: mysql_pkg_postinst
# @DESCRIPTION:
# Run post-installation tasks:
#   create the dir for logfiles if non-existant
#   touch the logfiles and secure them
#   install scripts
#   issue required steps for optional features
#   issue deprecation warnings
mysql_pkg_postinst() {
        # Make sure the vars are correctly initialized
        mysql_init_vars

        # Check FEATURES="collision-protect" before removing this
        [[ -d "${ROOT}/var/log/mysql" ]] || install -d -m0750 -o mysql -g mysql "${ROOT}${MY_LOGDIR}"

        # Secure the logfiles
        touch "${ROOT}${MY_LOGDIR}"/mysql.{log,err}
        chown mysql:mysql "${ROOT}${MY_LOGDIR}"/mysql*
        chmod 0660 "${ROOT}${MY_LOGDIR}"/mysql*

        # Minimal builds don't have the MySQL server
        if ! use minimal ; then
                docinto "support-files"
                for script in \
                        support-files/my-*.cnf \
                        support-files/magic \
                        support-files/ndb-config-2-node.ini
                do
                        [[ -f "${script}" ]] \
                        && dodoc "${script}"
                done

                docinto "scripts"
                for script in scripts/mysql* ; do
                        [[ -f "${script}" ]] \
                        && [[ "${script%.sh}" == "${script}" ]] \
                        && dodoc "${script}"
                done

                einfo
                elog "You might want to run:"
                elog "\"emerge --config =${CATEGORY}/${PF}\""
                elog "if this is a new install."
                einfo

                einfo
                elog "If you are upgrading major versions, you should run the"
                elog "mysql_upgrade tool."
                einfo
        fi

        if pbxt_available && use pbxt ; then
                # TODO: explain it better
                elog "    mysql> INSTALL PLUGIN pbxt SONAME 'libpbxt.so';"
                elog "    mysql> CREATE TABLE t1 (c1 int, c2 text) ENGINE=pbxt;"
                elog "if, after that, you cannot start the MySQL server,"
                elog "remove the ${MY_DATADIR}/mysql/plugin.* files, then"
                elog "use the MySQL upgrade script to restore the table"
                elog "or execute the following SQL command:"
                elog "    CREATE TABLE IF NOT EXISTS plugin ("
                elog "      name char(64) binary DEFAULT '' NOT NULL,"
                elog "      dl char(128) DEFAULT '' NOT NULL,"
                elog "      PRIMARY KEY (name)"
                elog "    ) CHARACTER SET utf8 COLLATE utf8_bin;"
        fi

        mysql_check_version_range "4.0 to 5.0.99.99" \
        && use berkdb \
        && elog "Berkeley DB support is deprecated and will be removed in future versions!"
}

# @FUNCTION: mysql_pkg_config
# @DESCRIPTION:
# Configure mysql environment.
mysql_pkg_config() {
        local old_MY_DATADIR="${MY_DATADIR}"

        # Make sure the vars are correctly initialized
        mysql_init_vars

        [[ -z "${MY_DATADIR}" ]] && die "Sorry, unable to find MY_DATADIR"

        if built_with_use ${CATEGORY}/${PN} minimal ; then
                die "Minimal builds do NOT include the MySQL server"
        fi

        if [[ ( -n "${MY_DATADIR}" ) && ( "${MY_DATADIR}" != "${old_MY_DATADIR}" ) ]]; then
                local MY_DATADIR_s="$(strip_duplicate_slashes ${ROOT}/${MY_DATADIR})"
                local old_MY_DATADIR_s="$(strip_duplicate_slashes ${ROOT}/${old_MY_DATADIR})"

                if [[ -d "${old_MY_DATADIR_s}" ]]; then
                        if [[ -d "${MY_DATADIR_s}" ]]; then
                                ewarn "Both ${old_MY_DATADIR_s} and ${MY_DATADIR_s} exist"
                                ewarn "Attempting to use ${MY_DATADIR_s} and preserving ${old_MY_DATADIR_s}"
                        else
                                elog "Moving MY_DATADIR from ${old_MY_DATADIR_s} to ${MY_DATADIR_s}"
                                mv --strip-trailing-slashes -T "${old_MY_DATADIR_s}" "${MY_DATADIR_s}" \
                                || die "Moving MY_DATADIR failed"
                        fi
                else
                        ewarn "Previous MY_DATADIR (${old_MY_DATADIR_s}) does not exist"
                        if [[ -d "${MY_DATADIR_s}" ]]; then
                                ewarn "Attempting to use ${MY_DATADIR_s}"
                        else
                                eerror "New MY_DATADIR (${MY_DATADIR_s}) does not exist"
                                die "Configuration Failed!  Please reinstall ${CATEGORY}/${PN}"
                        fi
                fi
        fi

        local pwd1="a"
        local pwd2="b"
        local maxtry=15

        if [ -z "${MYSQL_ROOT_PASSWORD}" -a -f "${ROOT}/root/.my.cnf" ]; then
                MYSQL_ROOT_PASSWORD="$(sed -n -e '/^password=/s,^password=,,gp' "${ROOT}/root/.my.cnf")"
        fi

        if [[ -d "${ROOT}/${MY_DATADIR}/mysql" ]] ; then
                ewarn "You have already a MySQL database in place."
                ewarn "(${ROOT}/${MY_DATADIR}/*)"
                ewarn "Please rename or delete it if you wish to replace it."
                die "MySQL database already exists!"
        fi

        # Bug #213475 - MySQL _will_ object strenously if your machine is named
        # localhost. Also causes weird failures.
        [[ "${HOSTNAME}" == "localhost" ]] && die "Your machine must NOT be named localhost"

        if [ -z "${MYSQL_ROOT_PASSWORD}" ]; then

                einfo "Please provide a password for the mysql 'root' user now, in the"
                einfo "MYSQL_ROOT_PASSWORD env var or through the /root/.my.cnf file."
                ewarn "Avoid [\"'\\_%] characters in the password"
                read -rsp "    >" pwd1 ; echo

                einfo "Retype the password"
                read -rsp "    >" pwd2 ; echo

                if [[ "x$pwd1" != "x$pwd2" ]] ; then
                        die "Passwords are not the same"
                fi
                MYSQL_ROOT_PASSWORD="${pwd1}"
                unset pwd1 pwd2
        fi

        local options=""
        local sqltmp="$(emktemp)"

        local help_tables="${ROOT}${MY_SHAREDSTATEDIR}/fill_help_tables.sql"
        [[ -r "${help_tables}" ]] \
        && cp "${help_tables}" "${TMPDIR}/fill_help_tables.sql" \
        || touch "${TMPDIR}/fill_help_tables.sql"
        help_tables="${TMPDIR}/fill_help_tables.sql"

        pushd "${TMPDIR}" &>/dev/null
        "${ROOT}/usr/bin/mysql_install_db" >"${TMPDIR}"/mysql_install_db.log 2>&1
        if [ $? -ne 0 ]; then
                grep -B5 -A999 -i "ERROR" "${TMPDIR}"/mysql_install_db.log 1>&2
                die "Failed to run mysql_install_db. Please review /var/log/mysql/mysqld.err AND ${TMPDIR}/mysql_install_db.log"
        fi
        popd &>/dev/null
        [[ -f "${ROOT}/${MY_DATADIR}/mysql/user.frm" ]] \
        || die "MySQL databases not installed"
        chown -R mysql:mysql "${ROOT}/${MY_DATADIR}" 2>/dev/null
        chmod 0750 "${ROOT}/${MY_DATADIR}" 2>/dev/null

        # Figure out which options we need to disable to do the setup
        helpfile="${TMPDIR}/mysqld-help"
        ${ROOT}/usr/sbin/mysqld --verbose --help >"${helpfile}" 2>/dev/null
        for opt in grant-tables host-cache name-resolve networking slave-start bdb \
                federated innodb ssl log-bin relay-log slow-query-log external-locking \
                ndbcluster \
                ; do
                optexp="--(skip-)?${opt}" optfull="--skip-${opt}"
                egrep -sq -- "${optexp}" "${helpfile}" && options="${options} ${optfull}"
        done
        # But some options changed names
        egrep -sq external-locking "${helpfile}" && \
        options="${options/skip-locking/skip-external-locking}"

        if mysql_version_is_at_least "4.1.3" ; then
                # Filling timezones, see
                # http://dev.mysql.com/doc/mysql/en/time-zone-support.html
                "${ROOT}/usr/bin/mysql_tzinfo_to_sql" "${ROOT}/usr/share/zoneinfo" > "${sqltmp}" 2>/dev/null

                if [[ -r "${help_tables}" ]] ; then
                        cat "${help_tables}" >> "${sqltmp}"
                fi
        fi

        einfo "Creating the mysql database and setting proper"
        einfo "permissions on it ..."

        local socket="${ROOT}/var/run/mysqld/mysqld${RANDOM}.sock"
        local pidfile="${ROOT}/var/run/mysqld/mysqld${RANDOM}.pid"
        local mysqld="${ROOT}/usr/sbin/mysqld \
                ${options} \
                --user=mysql \
                --basedir=${ROOT}/usr \
                --datadir=${ROOT}/${MY_DATADIR} \
                --max_allowed_packet=8M \
                --net_buffer_length=16K \
                --default-storage-engine=MyISAM \
                --socket=${socket} \
                --pid-file=${pidfile}"
        #einfo "About to start mysqld: ${mysqld}"
        ebegin "Starting mysqld"
        ${mysqld} &
        rc=$?
        while ! [[ -S "${socket}" || "${maxtry}" -lt 1 ]] ; do
                maxtry=$((${maxtry}-1))
                echo -n "."
                sleep 1
        done
        eend $rc

        if ! [[ -S "${socket}" ]]; then
                die "Completely failed to start up mysqld with: ${mysqld}"
        fi

        ebegin "Setting root password"
        # Do this from memory, as we don't want clear text passwords in temp files
        local sql="UPDATE mysql.user SET Password = PASSWORD('${MYSQL_ROOT_PASSWORD}') WHERE USER='root'"
        "${ROOT}/usr/bin/mysql" \
                --socket=${socket} \
                -hlocalhost \
                -e "${sql}"
        eend $?

        ebegin "Loading \"zoneinfo\", this step may require a few seconds ..."
        "${ROOT}/usr/bin/mysql" \
                --socket=${socket} \
                -hlocalhost \
                -uroot \
                -p"${MYSQL_ROOT_PASSWORD}" \
                mysql < "${sqltmp}"
        rc=$?
        eend $?
        [ $rc -ne 0 ] && ewarn "Failed to load zoneinfo!"

        # Stop the server and cleanup
        einfo "Stopping the server ..."
        kill $(< "${pidfile}" )
        rm -f "${sqltmp}"
        wait %1
        einfo "Done"
}

# @FUNCTION: mysql_pkg_postrm
# @DESCRIPTION:
# Remove mysql symlinks.
mysql_pkg_postrm() {
        : # mysql_lib_symlinks "${D}"
}