On Thursday 03 of June 2010 01:32:09 Nathan Phillip Brink wrote:
> On Mon, May 31, 2010 at 03:29:01PM +0200, Maciej Mrozowski wrote:
> > On Wednesday 26 of May 2010 19:27:43 Mike Frysinger wrote:
> > > On Wednesday 26 May 2010 05:38:00 Maciej Mrozowski wrote:
> > > > I've updated documentation, added example usage and option to keep
> > > > libtool files (ltdl.so supposedly needs those as I was told, no idea
> > > > what for).
> 
> IMO, ltdl.so is probably just being silly. Perhaps these files contain
> information that is useful on non-Linux systems for dlopen()ing
> plugins.
> 
> > > more applicable to us w/Linux is that static linking with libtool needs
> > > them. the AUTOTOOLS_KEEP_LA_FILES seems kind of spurious considering
> > > current tree behavior and assumption of gnu-capable linking systems.
> > 
> > It is spurious when we forget about run-time dynamic linking (plugins) in
> > some apps.
> > libtool loader (ltdl.so) needs .la files unfortunately. One example -
> > imagemagick - removing .la files for coders makes 'convert' unable to
> > locate them (silly, but hey...).
> 
> This case can be caught by checking if the .la file has the following in
> it: ``
> # Should we warn about portability when linking against -modules?
> shouldnotlink=yes
> ''

Excellent. Eclass updated, see attachment. AUTOTOOLS_KEEP_LA_FILES option 
removed. Now removing .la files relies only on shouldnotlink value (and 
static-libs presence in IUSE that is).

> Removing .la files which are useless on a given system would be very
> nice. It would be even more useful if unused .a files could be swept
> away at the same time :-).

They are - just add static-libs to IUSE and disable said USE flag when 
emerging.

I've also had an idea to be smarter and to look for patches (PATCHES array) 
updating any .m4, Makefile.{ac,in}, configure.{ac.in} files and to run 
eautoreconf automatically in ${eclass}_src_prepare but I've decided it's a bit 
too much. I may rethink the idea later though.

If there are no objections nor further comments, I'd like to unleash new 
eclass for public consumption within a few days.

Real-world example ebuild attached, also there's more extensive (but purely 
academic) example in eclass itself.

-- 
regards
MM

# Copyright 1999-2010 Gentoo Foundation
# Distributed under the terms of the GNU General Public License v2
# $Header: $

# @ECLASS: autotools-utils.eclass
# @MAINTAINER:
# Maciej Mrozowski <reavertm@g.o>
# @BLURB: common ebuild functions for autotools-based packages
# @DESCRIPTION:
# autotools-utils.eclass is autotools.eclass(5) and base.eclass(5) wrapper
# providing all inherited features along with econf arguments as Bash array,
# out of source build with overridable build dir location, static archives
# handling, libtool files removal, enable/disable debug handling.
#
# @EXAMPLE:
# Typical ebuild using autotools-utils.eclass:
#
# @CODE
# EAPI="2"
#
# inherit autotools-utils
#
# DESCRIPTION="Foo bar application"
# HOMEPAGE="http://example.org/foo/"
# SRC_URI="mirror://sourceforge/foo/${P}.tar.bz2"
#
# LICENSE="LGPL-2.1"
# KEYWORDS=""
# SLOT="0"
# IUSE="debug doc examples qt4 static-libs tiff"
#
# CDEPEND="
# 	media-libs/libpng:0
# 	qt4? (
# 		x11-libs/qt-core:4
# 		x11-libs/qt-gui:4
# 	)
# 	tiff? ( media-libs/tiff:0 )
# "
# RDEPEND="${CDEPEND}
# 	!media-gfx/bar
# "
# DEPEND="${CDEPEND}
# 	doc? ( app-doc/doxygen )
# "
#
# # bug 123456
# AUTOTOOLS_IN_SOURCE_BUILD=1
#
# DOCS=(AUTHORS ChangeLog README "Read me.txt" TODO)
#
# PATCHES=(
# 	"${FILESDIR}/${P}-gcc44.patch" # bug 123458
# 	"${FILESDIR}/${P}-as-needed.patch"
# 	"${FILESDIR}/${P}-unbundle_libpng.patch"
# )
#
# src_configure() {
# 	myeconfargs=(
# 		$(use_with qt4)
# 		$(use_enable threads multithreading)
# 		$(use_with tiff)
# 	)
# 	autotools-utils_src_configure
# }
#
# src_compile() {
# 	autotools-utils_src_compile
# 	use doc && autotools-utils_src_compile docs
# }
#
# src_install() {
# 	use doc && HTML_DOCS=("${AUTOTOOLS_BUILD_DIR}/apidocs/html/")
# 	autotools-utils_src_install
# 	if use examples; then
# 		dobin "${AUTOTOOLS_BUILD_DIR}"/foo_example{1,2,3} \\
# 			|| die 'dobin examples failed'
# 	fi
# }
#
# @CODE

# Keep variable names synced with cmake-utils and the other way around!

case ${EAPI:-0} in
	2|3|4) ;;
	*) DEPEND="EAPI-TOO-OLD" ;;
esac

inherit autotools base

EXPORT_FUNCTIONS src_prepare src_configure src_compile src_install src_test

# @ECLASS-VARIABLE: AUTOTOOLS_BUILD_DIR
# @DESCRIPTION:
# Build directory, location where all autotools generated files should be
# placed. For out of source builds it defaults to ${WORKDIR}/${P}_build.

# @ECLASS-VARIABLE: AUTOTOOLS_IN_SOURCE_BUILD
# @DESCRIPTION:
# Set to enable in-source build.

# @ECLASS-VARIABLE: ECONF_SOURCE
# @DESCRIPTION:
# Specify location of autotools' configure script. By default it uses ${S}.

# @ECLASS-VARIABLE: myeconfargs
# @DESCRIPTION:
# Optional econf arguments as Bash array. Should be defined before calling src_configure.
# @CODE
# src_configure() {
# 	myeconfargs=(
# 		--disable-readline
# 		--with-confdir="/etc/nasty foo confdir/"
# 		$(use_enable debug cnddebug)
# 		$(use_enable threads multithreading)
# 	)
# 	autotools-utils_src_configure
# }
# @CODE

# Determine using IN or OUT source build
_check_build_dir() {
	: ${ECONF_SOURCE:=${S}}
	if [[ -n ${AUTOTOOLS_IN_SOURCE_BUILD} ]]; then
		AUTOTOOLS_BUILD_DIR="${ECONF_SOURCE}"
	else
		: ${AUTOTOOLS_BUILD_DIR:=${WORKDIR}/${P}_build}
	fi
	echo ">>> Working in BUILD_DIR: \"$AUTOTOOLS_BUILD_DIR\""
}

# @FUNCTION: autotools-utils_src_prepare
# @DESCRIPTION:
# The src_prepare function, supporting PATCHES array and user patches.
# See base.eclass(5) for reference.
autotools-utils_src_prepare() {
	debug-print-function $FUNCNAME "$@"

	base_src_prepare
}

# @FUNCTION: autotools-utils_src_configure
# @DESCRIPTION:
# The src_configure function. For out of source build it creates build
# directory and runs econf there. Configuration parameters defined
# in myeconfargs are passed here to econf. Additionally following USE
# flags are known:
#
# IUSE="debug" passes --disable-debug/--enable-debug to econf respectively.
#
# IUSE="static-libs" passes --enable-shared and either --disable-static/--enable-static
# to econf respectively.
autotools-utils_src_configure() {
	debug-print-function $FUNCNAME "$@"

	local econfargs=(${myeconfargs[@]})

	# Handle debug found in IUSE
	if has debug ${IUSE//+}; then
		econfargs+=($(use_enable debug))
	fi

	# Handle static-libs found in IUSE, disable them by default
	if has static-libs ${IUSE//+}; then
		econfargs+=(
			--enable-shared
			$(use_enable static-libs static)
		)
	fi

	_check_build_dir
	mkdir -p "${AUTOTOOLS_BUILD_DIR}" || die "mkdir '${AUTOTOOLS_BUILD_DIR}' failed"
	pushd "${AUTOTOOLS_BUILD_DIR}" > /dev/null
	base_src_configure "${econfargs[@]}"
	popd > /dev/null
}

# @FUNCTION: autotools-utils_src_compile
# @DESCRIPTION:
# The autotools src_compile function, invokes emake in specified AUTOTOOLS_BUILD_DIR.
autotools-utils_src_compile() {
	debug-print-function $FUNCNAME "$@"

	_check_build_dir
	pushd "${AUTOTOOLS_BUILD_DIR}" > /dev/null
	base_src_compile "$@"
	popd > /dev/null
}

# @FUNCTION: autotools-utils_src_install
# @DESCRIPTION:
# The autotools src_install function. Runs emake install and removes libtool files
# when static-libs USE flag is defined and unset.
# DOCS and HTML_DOCS arrays are supported. See base.eclass(5) for reference.
autotools-utils_src_install() {
	debug-print-function $FUNCNAME "$@"

	_check_build_dir
	pushd "${AUTOTOOLS_BUILD_DIR}" > /dev/null
	base_src_install
	popd > /dev/null

	# Remove libtool files
	if has static-libs ${IUSE//+} && ! use static-libs; then
		local f
		for f in $(find "${D}" -type f -name '*.la'); do
			# Keep only .la files with shouldnotlink=yes - likely plugins
			[[ -n `sed -ne '/^shouldnotlink=yes$/p' "${f}"` ]] || rm -f "${f}"
		done
	fi
}

# @FUNCTION: autotools-utils_src_test
# @DESCRIPTION:
# The autotools src_test function. Runs emake check in build directory.
autotools-utils_src_test() {
	debug-print-function ${FUNCNAME} "$@"

	_check_build_dir
	pushd "${AUTOTOOLS_BUILD_DIR}" > /dev/null
	# Run default src_test as defined in ebuild.sh
	default_src_test
	popd > /dev/null
}

# Copyright 1999-2010 Gentoo Foundation
# Distributed under the terms of the GNU General Public License v2
# $Header: /var/cvsroot/gentoo-x86/media-libs/plib/plib-1.8.5.ebuild,v 1.6 2009/12/26 16:59:50 armin76 Exp $

EAPI=2

WANT_AUTOCONF=2.5
WANT_AUTOMAKE=1.9
inherit autotools-utils

DESCRIPTION="multimedia library used by many games"
HOMEPAGE="http://plib.sourceforge.net/"
SRC_URI="http://plib.sourceforge.net/dist/${P}.tar.gz"

LICENSE="LGPL-2"
SLOT="0"
KEYWORDS="~alpha ~amd64 ~hppa ~ppc ~sparc ~x86"
IUSE="static-libs"

RDEPEND="
	media-libs/libsdl
	virtual/glut
	virtual/opengl
"
DEPEND="${RDEPEND}"

PATCHES=(
	"${FILESDIR}/${P}-shared-libs.patch"
)

DOCS=(AUTHORS ChangeLog KNOWN_BUGS NOTICE README TODO-1.6 TODO-2.0 TODO_AFTER135)

src_prepare() {
	autotools-utils_src_prepare
	eautoreconf
}