>>>>> On Fri, 4 Jul 2014, Michał Górny wrote:

>> Since names like _USER or _PAM look a little dangerous, I suggest
>> _<eclassname>_ECLASS for the variable's name.
>> 
>> I have no strong preference for the variable's value. Is testing
>> for a non-empty value sufficient? Then we should assign something
>> simple (like "1"). If not, any string that is sufficiently random
>> (like the one used in eutils) should be good.

> I'd rather go for simple value and simple test. Exact tests with
> weird names are more prone to mistakes, and this is not something
> you usually test.

I don't see any different opinions. The patch included below renames
all variables whose name starts with two underscores.

Please review.

Ulrich


--- autotools.eclass    1 Mar 2014 11:51:08 -0000       1.161
+++ autotools.eclass    5 Jul 2014 17:23:09 -0000
@@ -13,8 +13,8 @@
 # Note: We require GNU m4, as does autoconf.  So feel free to use any features
 # from the GNU version of m4 without worrying about other variants (i.e. BSD).
 
-if [[ ${___ECLASS_ONCE_AUTOTOOLS} != "recur -_+^+_- spank" ]] ; then
-___ECLASS_ONCE_AUTOTOOLS="recur -_+^+_- spank"
+if [[ -z ${_AUTOTOOLS_ECLASS} ]]; then
+_AUTOTOOLS_ECLASS=1
 
 inherit libtool multiprocessing
 
--- base.eclass 27 Sep 2012 16:35:41 -0000      1.58
+++ base.eclass 5 Jul 2014 17:23:09 -0000
@@ -1,4 +1,4 @@
-# Copyright 1999-2012 Gentoo Foundation
+# Copyright 1999-2014 Gentoo Foundation
 # Distributed under the terms of the GNU General Public License v2
 # $Header: /var/cvsroot/gentoo-x86/eclass/base.eclass,v 1.58 2012/09/27 
16:35:41 axs Exp $
 
@@ -11,8 +11,8 @@
 # @DESCRIPTION:
 # The base eclass defines some default functions and variables.
 
-if [[ ${___ECLASS_ONCE_BASE} != "recur -_+^+_- spank" ]] ; then
-___ECLASS_ONCE_BASE="recur -_+^+_- spank"
+if [[ -z ${_BASE_ECLASS} ]]; then
+_BASE_ECLASS=1
 
 inherit eutils
 
--- cdrom.eclass        18 Jan 2012 12:42:06 -0000      1.5
+++ cdrom.eclass        5 Jul 2014 17:23:09 -0000
@@ -1,4 +1,4 @@
-# Copyright 1999-2012 Gentoo Foundation
+# Copyright 1999-2014 Gentoo Foundation
 # Distributed under the terms of the GNU General Public License v2
 # $Header: /var/cvsroot/gentoo-x86/eclass/cdrom.eclass,v 1.5 2012/01/18 
12:42:06 vapier Exp $
 
@@ -15,8 +15,8 @@
 # and when the function returns, you can assume that the cd has been
 # found at CDROM_ROOT.
 
-if [[ -z ${___ECLASS_ONCE_CDROM} ]]; then
-___ECLASS_ONCE_CDROM=1
+if [[ -z ${_CDROM_ECLASS} ]]; then
+_CDROM_ECLASS=1
 
 inherit portability
 
--- cmake-utils.eclass  6 May 2014 15:29:02 -0000       1.107
+++ cmake-utils.eclass  5 Jul 2014 17:23:10 -0000
@@ -17,8 +17,8 @@
 # builds (default), in-source builds and an implementation of the well-known 
use_enable
 # and use_with functions for CMake.
 
-if [[ ${___ECLASS_ONCE_CMAKE_UTILS} != "recur -_+^+_- spank" ]] ; then
-___ECLASS_ONCE_CMAKE_UTILS="recur -_+^+_- spank"
+if [[ -z ${_CMAKE_UTILS_ECLASS} ]]; then
+_CMAKE_UTILS_ECLASS=1
 
 # @ECLASS-VARIABLE: WANT_CMAKE
 # @DESCRIPTION:
--- cvs.eclass  28 Sep 2013 16:22:29 -0000      1.83
+++ cvs.eclass  5 Jul 2014 17:23:10 -0000
@@ -1,4 +1,4 @@
-# Copyright 1999-2013 Gentoo Foundation
+# Copyright 1999-2014 Gentoo Foundation
 # Distributed under the terms of the GNU General Public License v2
 # $Header: /var/cvsroot/gentoo-x86/eclass/cvs.eclass,v 1.83 2013/09/28 
16:22:29 ottxor Exp $
 
@@ -13,8 +13,8 @@
 # cvs_src_unpack. If you find that you need to call the cvs_* functions
 # directly, I'd be interested to hear about it.
 
-if [[ ${___ECLASS_ONCE_CVS} != "recur -_+^+_- spank" ]] ; then
-___ECLASS_ONCE_CVS="recur -_+^+_- spank"
+if [[ -z ${_CVS_ECLASS} ]]; then
+_CVS_ECLASS=1
 
 inherit eutils
 
--- enlightenment.eclass        12 Oct 2013 15:30:23 -0000      1.105
+++ enlightenment.eclass        5 Jul 2014 17:23:10 -0000
@@ -1,4 +1,4 @@
-# Copyright 1999-2013 Gentoo Foundation
+# Copyright 1999-2014 Gentoo Foundation
 # Distributed under the terms of the GNU General Public License v2
 # $Header: /var/cvsroot/gentoo-x86/eclass/enlightenment.eclass,v 1.105 
2013/10/12 15:30:23 aballier Exp $
 
@@ -7,8 +7,8 @@
 # enlightenm...@gentoo.org
 # @BLURB: simplify enlightenment package management
 
-if [[ ${___ECLASS_ONCE_ENLIGHTENMENT} != "recur -_+^+_- spank" ]] ; then
-___ECLASS_ONCE_ENLIGHTENMENT="recur -_+^+_- spank"
+if [[ -z ${_ENLIGHTENMENT_ECLASS} ]]; then
+_ENLIGHTENMENT_ECLASS=1
 
 inherit eutils libtool
 
--- eutils.eclass       4 Jul 2014 08:01:51 -0000       1.435
+++ eutils.eclass       5 Jul 2014 17:23:11 -0000
@@ -1,4 +1,4 @@
-# Copyright 1999-2013 Gentoo Foundation
+# Copyright 1999-2014 Gentoo Foundation
 # Distributed under the terms of the GNU General Public License v2
 # $Header: /var/cvsroot/gentoo-x86/eclass/eutils.eclass,v 1.435 2014/07/04 
08:01:51 ulm Exp $
 
@@ -15,8 +15,8 @@
 # Due to the nature of this eclass, some functions may have maintainers
 # different from the overall eclass!
 
-if [[ ${___ECLASS_ONCE_EUTILS} != "recur -_+^+_- spank" ]] ; then
-___ECLASS_ONCE_EUTILS="recur -_+^+_- spank"
+if [[ -z ${_EUTILS_ECLASS} ]]; then
+_EUTILS_ECLASS=1
 
 inherit multilib toolchain-funcs
 
@@ -114,7 +114,7 @@
 # @CODE
 estack_push() {
        [[ $# -eq 0 ]] && die "estack_push: incorrect # of arguments"
-       local stack_name="__ESTACK_$1__" ; shift
+       local stack_name="_ESTACK_$1_" ; shift
        eval ${stack_name}+=\( \"\$@\" \)
 }
 
@@ -127,23 +127,23 @@
 estack_pop() {
        [[ $# -eq 0 || $# -gt 2 ]] && die "estack_pop: incorrect # of arguments"
 
-       # We use the fugly __estack_xxx var names to avoid collision with
+       # We use the fugly _estack_xxx var names to avoid collision with
        # passing back the return value.  If we used "local i" and the
        # caller ran `estack_pop ... i`, we'd end up setting the local
-       # copy of "i" rather than the caller's copy.  The __estack_xxx
+       # copy of "i" rather than the caller's copy.  The _estack_xxx
        # garbage is preferable to using $1/$2 everywhere as that is a
        # bit harder to read.
-       local __estack_name="__ESTACK_$1__" ; shift
-       local __estack_retvar=$1 ; shift
-       eval local __estack_i=\${#${__estack_name}\[@\]}
+       local _estack_name="_ESTACK_$1_" ; shift
+       local _estack_retvar=$1 ; shift
+       eval local _estack_i=\${#${_estack_name}\[@\]}
        # Don't warn -- let the caller interpret this as a failure
        # or as normal behavior (akin to `shift`)
-       [[ $(( --__estack_i )) -eq -1 ]] && return 1
+       [[ $(( --_estack_i )) -eq -1 ]] && return 1
 
-       if [[ -n ${__estack_retvar} ]] ; then
-               eval 
${__estack_retvar}=\"\${${__estack_name}\[${__estack_i}\]}\"
+       if [[ -n ${_estack_retvar} ]] ; then
+               eval ${_estack_retvar}=\"\${${_estack_name}\[${_estack_i}\]}\"
        fi
-       eval unset ${__estack_name}\[${__estack_i}\]
+       eval unset ${_estack_name}\[${_estack_i}\]
 }
 
 # @FUNCTION: evar_push
@@ -174,7 +174,7 @@
        for var ; do
                [[ ${!var+set} == "set" ]] \
                        && val=${!var} \
-                       || val="${___ECLASS_ONCE_EUTILS}"
+                       || val="unset_3842dbba1e279bf4dff664ea0f3483f4675af6c5"
                estack_push evar "${var}" "${val}"
        done
 }
@@ -211,7 +211,7 @@
        while (( cnt-- )) ; do
                estack_pop evar val || die "${FUNCNAME}: unbalanced push"
                estack_pop evar var || die "${FUNCNAME}: unbalanced push"
-               [[ ${val} == "${___ECLASS_ONCE_EUTILS}" ]] \
+               [[ ${val} == "unset_3842dbba1e279bf4dff664ea0f3483f4675af6c5" 
]] \
                        && unset ${var} \
                        || printf -v "${var}" '%s' "${val}"
        done
--- fcaps.eclass        27 Jun 2013 01:18:57 -0000      1.8
+++ fcaps.eclass        5 Jul 2014 17:23:12 -0000
@@ -1,4 +1,4 @@
-# Copyright 1999-2013 Gentoo Foundation
+# Copyright 1999-2014 Gentoo Foundation
 # Distributed under the terms of the GNU General Public License v2
 # $Header: /var/cvsroot/gentoo-x86/eclass/fcaps.eclass,v 1.8 2013/06/27 
01:18:57 vapier Exp $
 
@@ -28,8 +28,8 @@
 # )
 # @CODE
 
-if [[ ${___ECLASS_ONCE_FCAPS} != "recur -_+^+_- spank" ]] ; then
-___ECLASS_ONCE_FCAPS="recur -_+^+_- spank"
+if [[ -z ${_FCAPS_ECLASS} ]]; then
+_FCAPS_ECLASS=1
 
 IUSE="+filecaps"
 
@@ -182,8 +182,8 @@
                                        continue 2
                                fi
                        done
-                       if [[ ${notfound} -eq 2 ]] && [[ -z ${__FCAPS_WARNED} 
]] ; then
-                               __FCAPS_WARNED="true"
+                       if [[ ${notfound} -eq 2 ]] && [[ -z ${_FCAPS_WARNED} ]] 
; then
+                               _FCAPS_WARNED="true"
                                ewarn "Could not find cap utils; make sure 
libcap or libcap-ng is available."
                        fi
                fi
--- fixheadtails.eclass 22 Aug 2011 04:46:31 -0000      1.12
+++ fixheadtails.eclass 5 Jul 2014 17:23:12 -0000
@@ -1,4 +1,4 @@
-# Copyright 1999-2011 Gentoo Foundation
+# Copyright 1999-2014 Gentoo Foundation
 # Distributed under the terms of the GNU General Public License v2
 # $Header: /var/cvsroot/gentoo-x86/eclass/fixheadtails.eclass,v 1.12 
2011/08/22 04:46:31 vapier Exp $
 
@@ -11,7 +11,7 @@
 
 DEPEND=">=sys-apps/sed-4"
 
-__do_sed_fix() {
+_do_sed_fix() {
        einfo " - fixed $1"
        sed -i \
                -e 's/head \+-\([0-9]\)/head -n \1/g' \
@@ -28,7 +28,7 @@
        local i
        einfo "Replacing obsolete head/tail with POSIX compliant ones"
        for i in "$@" ; do
-               __do_sed_fix "$i"
+               _do_sed_fix "$i"
        done
 }
 
--- flag-o-matic.eclass 4 Jul 2014 08:01:51 -0000       1.200
+++ flag-o-matic.eclass 5 Jul 2014 17:23:12 -0000
@@ -10,8 +10,8 @@
 # This eclass contains a suite of functions to help developers sanely
 # and safely manage toolchain flags in their builds.
 
-if [[ ${___ECLASS_ONCE_FLAG_O_MATIC} != "recur -_+^+_- spank" ]] ; then
-___ECLASS_ONCE_FLAG_O_MATIC="recur -_+^+_- spank"
+if [[ -z ${_FLAG_O_MATIC_ECLASS} ]]; then
+_FLAG_O_MATIC_ECLASS=1
 
 inherit eutils toolchain-funcs multilib
 
--- games.eclass        12 Mar 2014 18:54:12 -0000      1.157
+++ games.eclass        5 Jul 2014 17:23:12 -0000
@@ -8,8 +8,8 @@
 # you better have a *good* reason why you're *not* using games.eclass
 # in a games-* ebuild
 
-if [[ ${___ECLASS_ONCE_GAMES} != "recur -_+^+_- spank" ]] ; then
-___ECLASS_ONCE_GAMES="recur -_+^+_- spank"
+if [[ -z ${_GAMES_ECLASS} ]]; then
+_GAMES_ECLASS=1
 
 inherit base multilib toolchain-funcs eutils user
 
--- kde4-base.eclass    4 Jul 2014 08:01:51 -0000       1.137
+++ kde4-base.eclass    5 Jul 2014 17:23:13 -0000
@@ -13,8 +13,8 @@
 # NOTE: KDE 4 ebuilds currently support EAPIs 4 and 5.  This will be
 # reviewed over time as new EAPI versions are approved.
 
-if [[ ${___ECLASS_ONCE_KDE4_BASE} != "recur -_+^+_- spank" ]] ; then
-___ECLASS_ONCE_KDE4_BASE="recur -_+^+_- spank"
+if [[ -z ${_KDE4_BASE_ECLASS} ]]; then
+_KDE4_BASE_ECLASS=1
 
 # @ECLASS-VARIABLE: KDE_SELINUX_MODULE
 # @DESCRIPTION:
--- kde4-functions.eclass       4 Jul 2014 08:01:51 -0000       1.69
+++ kde4-functions.eclass       5 Jul 2014 17:23:13 -0000
@@ -12,8 +12,8 @@
 # This eclass contains all functions shared by the different eclasses,
 # for KDE 4 ebuilds.
 
-if [[ ${___ECLASS_ONCE_KDE4_FUNCTIONS} != "recur -_+^+_- spank" ]] ; then
-___ECLASS_ONCE_KDE4_FUNCTIONS="recur -_+^+_- spank"
+if [[ -z ${_KDE4_FUNCTIONS_ECLASS} ]]; then
+_KDE4_FUNCTIONS_ECLASS=1
 
 # @ECLASS-VARIABLE: EAPI
 # @DESCRIPTION:
--- kde4-meta-pkg.eclass        7 Apr 2013 17:33:18 -0000       1.12
+++ kde4-meta-pkg.eclass        5 Jul 2014 17:23:13 -0000
@@ -1,4 +1,4 @@
-# Copyright 1999-2013 Gentoo Foundation
+# Copyright 1999-2014 Gentoo Foundation
 # Distributed under the terms of the GNU General Public License v2
 # $Header: /var/cvsroot/gentoo-x86/eclass/kde4-meta-pkg.eclass,v 1.12 
2013/04/07 17:33:18 kensington Exp $
 
@@ -9,8 +9,8 @@
 # @DESCRIPTION:
 # This eclass should only be used for defining meta packages for KDE4.
 
-if [[ ${___ECLASS_ONCE_KDE4_META_PKG} != "recur -_+^+_- spank" ]] ; then
-___ECLASS_ONCE_KDE4_META_PKG="recur -_+^+_- spank"
+if [[ -z ${_KDE4_META_PKG_ECLASS} ]]; then
+_KDE4_META_PKG_ECLASS=1
 
 inherit kde4-functions
 
--- kde4-meta.eclass    17 Apr 2014 18:16:54 -0000      1.76
+++ kde4-meta.eclass    5 Jul 2014 17:23:13 -0000
@@ -12,8 +12,8 @@
 # You must define KMNAME to use this eclass, and do so before inheriting it. 
All other variables are optional.
 # Do not include the same item in more than one of KMMODULE, KMMEXTRA, 
KMCOMPILEONLY, KMEXTRACTONLY.
 
-if [[ ${___ECLASS_ONCE_KDE4_META} != "recur -_+^+_- spank" ]] ; then
-___ECLASS_ONCE_KDE4_META="recur -_+^+_- spank"
+if [[ -z ${_KDE4_META_ECLASS} ]]; then
+_KDE4_META_ECLASS=1
 
 [[ -z ${KMNAME} ]] && die "kde4-meta.eclass inherited but KMNAME not defined - 
broken ebuild"
 
@@ -167,7 +167,7 @@
                                                || die "${escm}: can't export 
cmake files to '${S}'."
                                fi
                                # Copy all subdirectories
-                               for subdir in $(__list_needed_subdirectories); 
do
+                               for subdir in $(_list_needed_subdirectories); do
                                        targetdir=""
                                        if [[ $subdir = doc/* && ! -e 
"$wc_path/$subdir" ]]; then
                                                continue
@@ -196,7 +196,7 @@
                tarfile="${DISTDIR}/${tarball}"
 
                # Detect real toplevel dir from tarball name - it will be used 
upon extraction
-               # and in __list_needed_subdirectories
+               # and in _list_needed_subdirectories
                topdir="${tarball%.tar.*}/"
 
                ebegin "Unpacking parts of ${tarball} to ${WORKDIR}"
@@ -207,7 +207,7 @@
                do
                        extractlist+=" ${topdir}${f}"
                done
-               extractlist+=" $(__list_needed_subdirectories)"
+               extractlist+=" $(_list_needed_subdirectories)"
 
                pushd "${WORKDIR}" > /dev/null
 
@@ -228,7 +228,7 @@
                eend $?
 
                if [[ -n ${KDE4_STRICTER} ]]; then
-                       for f in $(__list_needed_subdirectories fatal); do
+                       for f in $(_list_needed_subdirectories fatal); do
                                if [[ ! -e ${S}/${f#*/} ]]; then
                                        eerror "'${f#*/}' is missing"
                                        abort=true
@@ -311,7 +311,7 @@
        debug-print "line ${LINENO} ${ECLASS} ${FUNCNAME}: KMEXTRACTONLY 
${KMEXTRACTONLY}"
 }
 
-__list_needed_subdirectories() {
+_list_needed_subdirectories() {
        local i j kmextra kmextra_expanded kmmodule_expanded 
kmcompileonly_expanded extractlist
 
        # We expand KMEXTRA by adding CMakeLists.txt files
--- libtool.eclass      12 Jun 2014 07:14:25 -0000      1.111
+++ libtool.eclass      5 Jul 2014 17:23:14 -0000
@@ -14,8 +14,8 @@
 # generated libtool files.  We do not run the libtoolize program because that
 # requires a regeneration of the main autotool files in order to work properly.
 
-if [[ ${___ECLASS_ONCE_LIBTOOL} != "recur -_+^+_- spank" ]] ; then
-___ECLASS_ONCE_LIBTOOL="recur -_+^+_- spank"
+if [[ -z ${_LIBTOOL_ECLASS} ]]; then
+_LIBTOOL_ECLASS=1
 
 # If an overlay has eclass overrides, but doesn't actually override the
 # libtool.eclass, we'll have ECLASSDIR pointing to the active overlay's
@@ -43,8 +43,8 @@
        local disp="${src} patch"
        local log="${T}/elibtool.log"
 
-       if [[ -z ${__ELT_NOTED_TMP} ]] ; then
-               __ELT_NOTED_TMP=true
+       if [[ -z ${_ELT_NOTED_TMP} ]] ; then
+               _ELT_NOTED_TMP=true
                printf 'temp patch: %s\n' "${patch}" > "${log}"
        fi
        printf '\nTrying %s\n' "${disp}" >> "${log}"
--- multilib.eclass     17 Jan 2014 07:44:45 -0000      1.105
+++ multilib.eclass     5 Jul 2014 17:23:14 -0000
@@ -1,4 +1,4 @@
-# Copyright 1999-2013 Gentoo Foundation
+# Copyright 1999-2014 Gentoo Foundation
 # Distributed under the terms of the GNU General Public License v2
 # $Header: /var/cvsroot/gentoo-x86/eclass/multilib.eclass,v 1.105 2014/01/17 
07:44:45 vapier Exp $
 
@@ -10,8 +10,8 @@
 # @DESCRIPTION:
 # This eclass is for all functions pertaining to handling multilib 
configurations.
 
-if [[ ${___ECLASS_ONCE_MULTILIB} != "recur -_+^+_- spank" ]] ; then
-___ECLASS_ONCE_MULTILIB="recur -_+^+_- spank"
+if [[ -z ${_MULTILIB_ECLASS} ]]; then
+_MULTILIB_ECLASS=1
 
 inherit toolchain-funcs
 
@@ -414,13 +414,13 @@
        export ABI=$1
 
        # First restore any saved state we have laying around.
-       if [[ ${__DEFAULT_ABI_SAVED} == "true" ]] ; then
+       if [[ ${_DEFAULT_ABI_SAVED} == "true" ]] ; then
                for v in CHOST CBUILD AS CC CXX LD PKG_CONFIG_{LIBDIR,PATH} ; do
-                       vv="__abi_saved_${v}"
+                       vv="_abi_saved_${v}"
                        [[ ${!vv+set} == "set" ]] && export ${v}="${!vv}" || 
unset ${v}
                        unset ${vv}
                done
-               unset __DEFAULT_ABI_SAVED
+               unset _DEFAULT_ABI_SAVED
        fi
 
        # We want to avoid the behind-the-back magic of gcc-config as it
@@ -428,10 +428,10 @@
        if [[ ${ABI} != ${DEFAULT_ABI} ]] ; then
                # Back that multilib-ass up so we can restore it later
                for v in CHOST CBUILD AS CC CXX LD PKG_CONFIG_{LIBDIR,PATH} ; do
-                       vv="__abi_saved_${v}"
+                       vv="_abi_saved_${v}"
                        [[ ${!v+set} == "set" ]] && export ${vv}="${!v}" || 
unset ${vv}
                done
-               export __DEFAULT_ABI_SAVED="true"
+               export _DEFAULT_ABI_SAVED="true"
 
                # Set the CHOST native first so that we pick up the native
                # toolchain and not a cross-compiler by accident #202811.
--- multiprocessing.eclass      21 Dec 2013 09:40:37 -0000      1.8
+++ multiprocessing.eclass      5 Jul 2014 17:23:14 -0000
@@ -1,4 +1,4 @@
-# Copyright 1999-2013 Gentoo Foundation
+# Copyright 1999-2014 Gentoo Foundation
 # Distributed under the terms of the GNU General Public License v2
 # $Header: /var/cvsroot/gentoo-x86/eclass/multiprocessing.eclass,v 1.8 
2013/12/21 09:40:37 vapier Exp $
 
@@ -33,8 +33,8 @@
 # multijob_finish
 # @CODE
 
-if [[ ${___ECLASS_ONCE_MULTIPROCESSING} != "recur -_+^+_- spank" ]] ; then
-___ECLASS_ONCE_MULTIPROCESSING="recur -_+^+_- spank"
+if [[ -z ${_MULTIPROCESSING_ECLASS} ]]; then
+_MULTIPROCESSING_ECLASS=1
 
 # @FUNCTION: bashpid
 # @DESCRIPTION:
--- pam.eclass  5 Aug 2012 15:34:20 -0000       1.23
+++ pam.eclass  5 Jul 2014 17:23:14 -0000
@@ -1,4 +1,4 @@
-# Copyright 1999-2012 Gentoo Foundation
+# Copyright 1999-2014 Gentoo Foundation
 # Distributed under the terms of the GNU General Public License, v2 or later
 # $Header: /var/cvsroot/gentoo-x86/eclass/pam.eclass,v 1.23 2012/08/05 
15:34:20 jlec Exp $
 #
@@ -13,8 +13,8 @@
 # This eclass contains functions to install pamd configuration files and
 # pam modules.
 
-if [[ ${___ECLASS_ONCE_PAM} != "recur -_+^+_- spank" ]] ; then
-___ECLASS_ONCE_PAM="recur -_+^+_- spank"
+if [[ -z ${_PAM_ECLASS} ]]; then
+_PAM_ECLASS=1
 
 inherit flag-o-matic multilib
 
--- pax-utils.eclass    18 May 2013 13:43:20 -0000      1.21
+++ pax-utils.eclass    5 Jul 2014 17:23:15 -0000
@@ -1,4 +1,4 @@
-# Copyright 1999-2013 Gentoo Foundation
+# Copyright 1999-2014 Gentoo Foundation
 # Distributed under the terms of the GNU General Public License v2
 # $Header: /var/cvsroot/gentoo-x86/eclass/pax-utils.eclass,v 1.21 2013/05/18 
13:43:20 zorry Exp $
 
@@ -22,8 +22,8 @@
 # to contain either "PT", "XT" or "none".  The default is to attempt both
 # PT_PAX and XATTR_PAX.
 
-if [[ ${___ECLASS_ONCE_PAX_UTILS} != "recur -_+^+_- spank" ]] ; then
-___ECLASS_ONCE_PAX_UTILS="recur -_+^+_- spank"
+if [[ -z ${_PAX_UTILS_ECLASS} ]]; then
+_PAX_UTILS_ECLASS=1
 
 # @ECLASS-VARIABLE: PAX_MARKINGS
 # @DESCRIPTION:
--- portability.eclass  28 May 2014 09:48:01 -0000      1.25
+++ portability.eclass  5 Jul 2014 17:23:15 -0000
@@ -9,8 +9,8 @@
 # Diego Pettenò <flamee...@gentoo.org>
 # @BLURB: This eclass is created to avoid using non-portable GNUisms inside 
ebuilds
 
-if [[ ${___ECLASS_ONCE_PORTABILITY} != "recur -_+^+_- spank" ]] ; then
-___ECLASS_ONCE_PORTABILITY="recur -_+^+_- spank"
+if [[ -z ${_PORTABILITY_ECLASS} ]]; then
+_PORTABILITY_ECLASS=1
 
 # @FUNCTION: treecopy
 # @USAGE: <orig1> [orig2 orig3 ....] <dest>
--- qmake-utils.eclass  2 Dec 2013 09:42:38 -0000       1.1
+++ qmake-utils.eclass  5 Jul 2014 17:23:15 -0000
@@ -1,4 +1,4 @@
-# Copyright 1999-2013 Gentoo Foundation
+# Copyright 1999-2014 Gentoo Foundation
 # Distributed under the terms of the GNU General Public License v2
 # $Header: /var/cvsroot/gentoo-x86/eclass/qmake-utils.eclass,v 1.1 2013/12/02 
09:42:38 pinkbyte Exp $
 
@@ -11,8 +11,8 @@
 # @DESCRIPTION:
 # Utility eclass providing wrapper functions for Qt4 and Qt5 qmake.
 
-if [[ ${___ECLASS_ONCE_QMAKE_UTILS} != "recur -_+^+_- spank" ]]; then
-___ECLASS_ONCE_QMAKE_UTILS="recur -_+^+_- spank"
+if [[ -z ${_QMAKE_UTILS_ECLASS} ]]; then
+_QMAKE_UTILS_ECLASS=1
 
 inherit eutils multilib toolchain-funcs
 
--- readme.gentoo.eclass        2 Jul 2014 13:32:48 -0000       1.11
+++ readme.gentoo.eclass        5 Jul 2014 17:23:15 -0000
@@ -15,8 +15,8 @@
 # shown at first package installation and a file for later reviewing will be
 # installed under /usr/share/doc/${PF}
 
-if [[ ${___ECLASS_ONCE_README_GENTOO} != "recur -_+^+_- spank" ]] ; then
-___ECLASS_ONCE_README_GENTOO="recur -_+^+_- spank"
+if [[ -z ${_README_GENTOO_ECLASS} ]]; then
+_README_GENTOO_ECLASS=1
 
 inherit eutils
 
--- toolchain-funcs.eclass      17 Jan 2014 03:46:31 -0000      1.126
+++ toolchain-funcs.eclass      5 Jul 2014 17:23:16 -0000
@@ -13,8 +13,8 @@
 # in such a way that you can rely on the function always returning
 # something sane.
 
-if [[ ${___ECLASS_ONCE_TOOLCHAIN_FUNCS} != "recur -_+^+_- spank" ]] ; then
-___ECLASS_ONCE_TOOLCHAIN_FUNCS="recur -_+^+_- spank"
+if [[ -z ${_TOOLCHAIN_FUNCS_ECLASS} ]]; then
+_TOOLCHAIN_FUNCS_ECLASS=1
 
 inherit multilib
 
--- unpacker.eclass     1 May 2014 19:27:14 -0000       1.17
+++ unpacker.eclass     5 Jul 2014 17:23:16 -0000
@@ -15,8 +15,8 @@
 #  - merge rpm unpacking
 #  - support partial unpacks?
 
-if [[ ${___ECLASS_ONCE_UNPACKER} != "recur -_+^+_- spank" ]] ; then
-___ECLASS_ONCE_UNPACKER="recur -_+^+_- spank"
+if [[ -z ${_UNPACKER_ECLASS} ]]; then
+_UNPACKER_ECLASS=1
 
 # @ECLASS-VARIABLE: UNPACKER_BZ2
 # @DEFAULT_UNSET
--- user.eclass 4 Jul 2014 08:01:51 -0000       1.23
+++ user.eclass 5 Jul 2014 17:23:16 -0000
@@ -1,4 +1,4 @@
-# Copyright 1999-2012 Gentoo Foundation
+# Copyright 1999-2014 Gentoo Foundation
 # Distributed under the terms of the GNU General Public License v2
 # $Header: /var/cvsroot/gentoo-x86/eclass/user.eclass,v 1.23 2014/07/04 
08:01:51 ulm Exp $
 
@@ -13,8 +13,8 @@
 # The user eclass contains a suite of functions that allow ebuilds
 # to quickly make sure users in the installed system are sane.
 
-if [[ ${___ECLASS_ONCE_USER} != "recur -_+^+_- spank" ]] ; then
-___ECLASS_ONCE_USER="recur -_+^+_- spank"
+if [[ -z ${_USER_ECLASS} ]]; then
+_USER_ECLASS=1
 
 # @FUNCTION: _assert_pkg_ebuild_phase
 # @INTERNAL
--- versionator.eclass  23 Nov 2013 04:35:16 -0000      1.24
+++ versionator.eclass  5 Jul 2014 17:23:16 -0000
@@ -1,4 +1,4 @@
-# Copyright 1999-2011 Gentoo Foundation
+# Copyright 1999-2014 Gentoo Foundation
 # Distributed under the terms of the GNU General Public License v2
 # $Header: /var/cvsroot/gentoo-x86/eclass/versionator.eclass,v 1.24 2013/11/23 
04:35:16 jcallen Exp $
 
@@ -26,8 +26,8 @@
 #     version_is_at_least             want      have
 #  which may be buggy, so use with caution.
 
-if [[ ${___ECLASS_ONCE_VERSIONATOR} != "recur -_+^+_- spank" ]] ; then
-___ECLASS_ONCE_VERSIONATOR="recur -_+^+_- spank"
+if [[ -z ${_VERSIONATOR_ECLASS} ]]; then
+_VERSIONATOR_ECLASS=1
 
 inherit eutils
 

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