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From 1b4bdce40f9244823c464f2a36a0db7cd6ba427b Mon Sep 17 00:00:00 2001
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Message-Id: <1b4bdce40f9244823c464f2a36a0db7cd6ba427b.1637678195.git.aclaudi@redhat.com>
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In-Reply-To: <b30268eda844bdebbb8e5e4f5735e3b1bb666368.1637678195.git.aclaudi@redhat.com>
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References: <b30268eda844bdebbb8e5e4f5735e3b1bb666368.1637678195.git.aclaudi@redhat.com>
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From: Andrea Claudi <aclaudi@redhat.com>
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Date: Tue, 23 Nov 2021 15:28:18 +0100
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Subject: [PATCH] configure: simplify options parsing
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Bugzilla: https://bugzilla.redhat.com/show_bug.cgi?id=2016061
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Upstream Status: iproute2.git commit 99245d17
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commit 99245d1741a85e4397973782578d4a78673eb348
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Author: Andrea Claudi <aclaudi@redhat.com>
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Date: Thu Oct 14 10:50:52 2021 +0200
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configure: simplify options parsing
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This commit simplifies options parsing moving all the code not related to
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parsing out of the case statement.
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- The conditional shift after the assignments is moved right after the
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case, reducing code duplication.
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- The semantic checks on the LIBBPF_FORCE value is moved after the loop
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like we already did for INCLUDE and LIBBPF_DIR.
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- Finally, the loop condition is changed to check remaining arguments, thus
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making it possible to get rid of the null string case break.
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As a bonus, now the help message states that on or off should follow
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--libbpf_force
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Signed-off-by: Andrea Claudi <aclaudi@redhat.com>
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Acked-by: Phil Sutter <phil@nwl.cc>
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Signed-off-by: David Ahern <dsahern@kernel.org>
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---
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configure | 37 ++++++++++++++++++-------------------
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1 file changed, 18 insertions(+), 19 deletions(-)
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diff --git a/configure b/configure
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index 9ec19a5b..26e06eb8 100755
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--- a/configure
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+++ b/configure
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@@ -485,12 +485,12 @@ usage()
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{
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cat <
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Usage: $0 [OPTIONS]
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- --include_dir <dir> Path to iproute2 include dir
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- --libbpf_dir <dir> Path to libbpf DESTDIR
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- --libbpf_force Enable/disable libbpf by force. Available options:
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- on: require link against libbpf, quit config if no libbpf support
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- off: disable libbpf probing
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- -h | --help Show this usage info
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+ --include_dir <dir> Path to iproute2 include dir
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+ --libbpf_dir <dir> Path to libbpf DESTDIR
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+ --libbpf_force <on|off> Enable/disable libbpf by force. Available options:
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+ on: require link against libbpf, quit config if no libbpf support
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+ off: disable libbpf probing
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+ -h | --help Show this usage info
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EOF
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exit $1
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}
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@@ -499,31 +499,25 @@ EOF
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if [ $# -eq 1 ] && [ "$(echo $1 | cut -c 1)" != '-' ]; then
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INCLUDE="$1"
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else
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- while true; do
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+ while [ "$#" -gt 0 ]; do
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case "$1" in
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--include_dir)
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shift
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- INCLUDE="$1"
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- [ "$#" -gt 0 ] && shift ;;
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+ INCLUDE="$1" ;;
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--libbpf_dir)
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shift
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- LIBBPF_DIR="$1"
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- [ "$#" -gt 0 ] && shift ;;
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+ LIBBPF_DIR="$1" ;;
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--libbpf_force)
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- if [ "$2" != 'on' ] && [ "$2" != 'off' ]; then
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- usage 1
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- fi
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- LIBBPF_FORCE=$2
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- shift 2 ;;
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+ shift
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+ LIBBPF_FORCE="$1" ;;
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-h | --help)
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usage 0 ;;
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--*)
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- shift ;;
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- "")
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- break ;;
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+ ;;
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*)
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usage 1 ;;
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esac
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+ [ "$#" -gt 0 ] && shift
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done
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fi
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@@ -531,6 +525,11 @@ fi
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if [ "${LIBBPF_DIR-unused}" != "unused" ]; then
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[ -d "$LIBBPF_DIR" ] || usage 1
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fi
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+if [ "${LIBBPF_FORCE-unused}" != "unused" ]; then
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+ if [ "$LIBBPF_FORCE" != 'on' ] && [ "$LIBBPF_FORCE" != 'off' ]; then
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+ usage 1
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+ fi
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+fi
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echo "# Generated config based on" $INCLUDE >$CONFIG
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quiet_config >> $CONFIG
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--
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2.31.1
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