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#!/bin/sh
#
# This script generates a project-wide version identifier for use by
# the `elftc_version()' API.
#
# $Id: make-toolchain-version 3414 2016-02-16 22:55:28Z jkoshy $
#
# Defaults.
#
buildhost=`uname -s`
elftcname="elftoolchain"
options="e:h:o:r:t:"
top=""
version="HEAD"
versionfile="elftc_version.c"
progname=`basename ${0}`
usage()
{
exec >&2
# Print a message, if supplied.
if [ -n "${*}" ]; then echo "##${@}"; fi
echo "Usage: ${progname} [options]"
echo " Generate a toolchain-wide version number"
echo " -e PROJECTNAME Set the project name [default: ${elftcname}]."
echo " -h HOSTOS Set the build OS [default: ${buildhost}]."
echo " -o OUTPUT Set the output file [default: ${versionfile}]."
echo " -r VERSION Set the version string [default: ${version}]."
echo " -t TOPDIR Set the top-of-tree directory [required]."
exit 1
}
#
# Parse options.
#
while getopts ${options} option
do
case ${option} in
'e') elftcname="${OPTARG}" ;;
'h') buildhost="${OPTARG}" ;;
'o') versionfile="${OPTARG}" ;;
'r') version="${OPTARG}" ;;
't') top="${OPTARG}" ;;
'?') usage ;;
esac
done
[ -n "${top}" ] || usage
# Try to determine the in-tree revision number.
#
# This script attempts to handle the case where our sources have been
# incorporated into an operating system's base sources.
#
# - If SVN is detected, we use the `svninfo' tool to determine the
# in-tree revision number.
# - If CVS is detected, we use the string `unknown'.
# - Otherwise, we use `git --describe'.
curdir=`pwd`
cd ${top} || usage "ERROR: Cannot change directory to \"${top}\"."
if [ -d CVS ]; then # Look for CVS (NetBSD).
versionstring=" cvs:unknown"
else # Try git (DragonFlyBSD).
gitversion="$(git describe --all --dirty --long 2> /dev/null)"
if [ -n "${gitversion}" ]; then
versionstring=" git:${gitversion}"
else # Assume an SVN checkout (SourceForge or FreeBSD).
svnversion="$(svnversion)"
if [ -n "${svnversion}" ]; then
versionstring=" svn:$(svnversion)"
fi
fi
fi
if [ -z "${versionstring}" ]; then
echo "ERROR: cannot determine a revision number." 1>&2
exit 1
fi
cd ${curdir} || usage "Cannot change back to ${curdir}."
#
# Only replace the source file if its content has changed.
#
tmpfile=`mktemp ${TMPDIR:-/tmp}/MV.XXXXXXX`
trap "rm -f ${tmpfile};" 0 1 2 3 15
cat > ${tmpfile} <<EOF
/* WARNING: Generated by "${progname}". */
#include <sys/types.h>
#include <libelftc.h>
const char *
elftc_version(void)
{
return "${elftcname} ${version} ${buildhost}${versionstring}";
}
EOF
if ! cmp -s ${tmpfile} ${versionfile}; then
echo "@ ${progname}: building \"${versionfile}\"."
cp ${tmpfile} ${versionfile} || exit ${?}
fi
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