scripts/build/debug/duma.in
author "Benoît THÉBAUDEAU" <benoit.thebaudeau@advansee.com>
Thu Jul 28 22:09:31 2011 +0200 (2011-07-28)
changeset 2573 424fa2092ace
parent 635 0d7348cb7faa
child 2908 dcdb309b7967
permissions -rw-r--r--
scripts/libc: do not build add-ons by default

Currently, no --enable-add-ons option is passed to libc configure when
"$(do_libc_add_ons_list ,)" is empty, which makes configure automatically search
for present add-ons. In that case, all present add-ons are built, although
no add-on was selected by the user in the config. Moreover, this can make the
configure fail if some non-standard add-ons like eglibc-localedef are present.

This behavior also leads to an inconsistency from a user point of view between
the following cases:
- LIBC_ADDONS_LIST="", LIBC_GLIBC_USE_PORTS=n and THREADS="none" in the config,
which makes "$(do_libc_add_ons_list ,)" return "", so all present add-ons
are built.
- LIBC_ADDONS_LIST="", LIBC_GLIBC_USE_PORTS=n and THREADS!="none" in the
config, which makes "$(do_libc_add_ons_list ,)" return the add-on supporting
the chosen threading implementation, e.g. "nptl", so only this add-on is
built.

This patch disables the building of all add-ons in that case.

It is still possible to build all present add-ons by adding --enable-add-ons to
LIBC_GLIBC_EXTRA_CONFIG_ARRAY.

Signed-off-by: "Benoît THÉBAUDEAU" <benoit.thebaudeau@advansee.com>
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#!/bin/sh
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# (C) 2008 Yann E. MORIN <yann.morin.1998@anciens.enib.fr>
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# Licensed under the GPL v.2
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LIBDUMA_SO=
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case "$1" in
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  -on)
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    case "${LD_PRELOAD}" in
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      *${LIBDUMA_SO}*) ;;
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      *) LD_PRELOAD="${LIBDUMA_SO} ${LD_PRELOAD}";;
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    esac
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    shift
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    ;;
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  -off)
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    # We use a suposedly POSIX-compliant shell: /bin/sh
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    #  -> we can't use "${LD_PRELOAD//${LIBDUMA_SO}/}", it's not POSIX
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    # We don't know if sed will be present on the target
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    #  -> we can't use $(echo "${LD_PRELOAD}" |sed -r -e "s|${LIBDUMA_SO}||;")
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    # So, iterate through LD_PRELOAD, and keep only those libs that
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    # are not "${LIBDUMA_SO}"
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    old_LD_PRELOAD="${LD_PRELOAD}"
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    LD_PRELOAD=
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    for lib in ${old_LD_PRELOAD}; do
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      [ "${lib}" = "${LIBDUMA_SO}" ] || LD_PRELOAD="${LD_PRELOAD} ${lib}"
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    done
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    unset old_LD_PRELOAD
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    shift
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    ;;
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  -show)
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    case "${LD_PRELOAD}" in
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      *${LIBDUMA_SO}*) echo "duma is enabled";;
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      *)               echo "duma is disabled";;
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    esac
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    exit 0
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    ;;
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  "")
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    cat <<_EOF_
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Usage:
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    . $0 <-on|-off|-show>
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        Sets, unsets or show DUMA usage.
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    $0 <executable [arg...]>
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        Execute 'executable' (with arguments 'args') using DUMA.
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_EOF_
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    false # Don't 'exit', we could well be source'd
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    ;;
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  *)
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    exec "$0" -on "$@"
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    ;;
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esac
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export LD_PRELOAD
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if [ -n "$1" ]; then
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  exec "$@"
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fi