# Copyright 1999-2017 Gentoo Foundation # Distributed under the terms of the GNU General Public License v2 # @ECLASS: epunt-cxx.eclass # @MAINTAINER: # base-system@gentoo.org # @BLURB: A function to punt C++ compiler checks from autoconf # @DESCRIPTION: # Support for punting C++ compiler checks from autoconf (based # on ELT-patches). if [[ -z ${_EPUNT_CXX_ECLASS} ]]; then # TODO: replace this with 'inherit eutils' once eutils stops inheriting # us if ! declare -F eqawarn >/dev/null ; then eqawarn() { has qa ${PORTAGE_ELOG_CLASSES} && ewarn "$@" : } fi # If an overlay has eclass overrides, but doesn't actually override the # libtool.eclass, we'll have ECLASSDIR pointing to the active overlay's # eclass/ dir, but libtool.eclass is still in the main Gentoo tree. So # add a check to locate the ELT-patches/ regardless of what's going on. # Note: Duplicated in libtool.eclass. _EUTILS_ECLASSDIR_LOCAL=${BASH_SOURCE[0]%/*} eutils_elt_patch_dir() { local d="${ECLASSDIR}/ELT-patches" if [[ ! -d ${d} ]] ; then d="${_EUTILS_ECLASSDIR_LOCAL}/ELT-patches" fi echo "${d}" } # @FUNCTION: epunt_cxx # @USAGE: [dir to scan] # @DESCRIPTION: # Many configure scripts wrongly bail when a C++ compiler could not be # detected. If dir is not specified, then it defaults to ${S}. # # https://bugs.gentoo.org/73450 epunt_cxx() { local dir=$1 [[ -z ${dir} ]] && dir=${S} ebegin "Removing useless C++ checks" local f p any_found while IFS= read -r -d '' f; do for p in "$(eutils_elt_patch_dir)"/nocxx/*.patch ; do if patch --no-backup-if-mismatch -p1 "${f}" "${p}" >/dev/null ; then any_found=1 break fi done done < <(find "${dir}" -name configure -print0) if [[ -z ${any_found} ]]; then eqawarn "epunt_cxx called unnecessarily (no C++ checks to punt)." fi eend 0 } _EPUNT_CXX_ECLASS=1 fi #_EPUNT_CXX_ECLASS