crosstool-ng/configure
Yann E. MORIN" a37a585637 configure: add support for helper script to compute version string
Some projects are using (or planning to use) crosstool-NG, and are storing
it in their VCS, which might not be Mercurial. At the same time, those
projects may want to track development snapshots versions the way we do
with the Hg identity string (hg id).

Provide a way for these project to do so, without having to patch
./configure, and maintain that patch over-and-over again.

Signed-off-by: "Yann E. MORIN" <yann.morin.1998@anciens.enib.fr>
2011-11-13 17:48:17 +01:00

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#!/bin/sh
myname="${0##*/}"
VERSION=$( cat .version )
DATE=$( date +%Y%m%d )
PREFIX_DEFAULT=/usr/local
BINDIR_set=
LIBDIR_set=
DOCDIR_set=
MANDIR_set=
PROG_PFX=
PROG_SFX=
PROG_SED=
LOCAL_set=
FORCE=
do_quit=
# Simply print the error message, and exit. Obvious, he?
do_error() {
printf "${myname}: ${@}\n"
exit 1
}
# Given an option string and the following argument,
# echoes the value of the option.
# If --var=val => echoes val and returns 0, meaning second arg was not consumed
# If --var val => echoes val and returns non null, meaning second arg was used
get_optval(){
case "$1" in
--*=?*)
printf "${1#*=}"
return 0
;;
*)
printf "${2}"
return 1
;;
esac
}
# The set_xxx functions will set the corresponding configuration variable
# They return 0 if second arg was not consumed, and non-zero if it was consumed.
set_prefix() {
PREFIX="$( get_optval "$1" "$2" )"
}
set_bindir() {
BINDIR_set=1
BINDIR="$( get_optval "$1" "$2" )"
}
set_libdir() {
LIBDIR_set=1
LIBDIR="$( get_optval "$1" "$2" )"
}
set_docdir() {
DOCDIR_set=1
DOCDIR="$( get_optval "$1" "$2" )"
}
set_mandir() {
MANDIR_set=1
MANDIR="$( get_optval "$1" "$2" )"
}
set_program_prefix() {
PROG_PFX="$( get_optval "$1" "$2" )"
}
set_program_suffix() {
PROG_SFX="$( get_optval "$1" "$2" )"
}
set_program_transform_name() {
PROG_SED="$( get_optval "$1" "$2" )"
}
set_tool() {
local var_name="${1%%=*}"
var_name="${var_name#--with-}"
eval ${var_name}="\$( get_optval "$1" "$2" )"
}
# var_list is a list of variables, each one holding a path to a
# tool, either detected by ./configure, or specified by the user.
var_list=""
kconfig_list=""
# This function adds a variable name to the above list of variable names.
# $1: the name of the variable to add to the list
add_to_var_list() {
local v
for v in ${var_list}; do
[ "${v}" = "${1}" ] && return 0
done
var_list="${var_list} ${1}"
}
add_to_kconfig_list() {
local k
for k in ${kconfig_list}; do
[ "${k}" = "${1}" ] && return 0
done
kconfig_list="${kconfig_list} ${1}"
}
# A function to test for required tools/headers/libraries
# Return 0 (true) if found, !0 (false) if not found
#
# $*: [prog|inc|lib]=<name[ name...]>
# the name(s) of tool(s) to test for
# mandatory
# eg: prog=bash prog="curl wget"
# $*: var=<var_name>
# the name of the variable to test and set
# optional
# eg: var=bash if ${bash} is set and non-null, use that,
# else check for bash and set bash=$(which bash)
# $*: ver=<regexp>
# for each 'prog', test if $(prog --version) matches 'regexp'
# optional
# eg: ver='^GNU bash, version [34]\.'
# $*: lib_exts=<extension[ extension...]>
# the list of allowed library extension
# mandatory
# eg: lib_exts="so dylib" lib_exts="so dylib a"
# $*: err=<error_message>
# the error message to print if tool is missing
# optional, defaults to: '${prog}: none found'
# eg: err="'bash' 3.x or above was not found"
# Note: err may be printed by caller, not us
# $*: kconfig=<var_name>
# the name of a variable to pass down to kconfig if
# the prog/inc/lib was found
# optional, defaults to none
# eg: kconfig=has_libncurses
# $*: skip=[y|n|]
# if set to 'y', skip the test, but still register the
# kconfig and var variables; if 'n' or empty, do the
# test.
# optional, default to 'n'
# eg: skip="${static_link_ko}"
check_for() {
local lib_exts
local skip
local val
local item
local where
local status
local ext
# Note: prog/inc/lib and var/kconfig/ver/err are set here,
# but declared by the caller (because it needs it)
for item in "${@}"; do
case "${item}" in
prog=*|inc=*|lib=*|var=*|ver=*|err=*|kconfig=*|lib_exts=*|skip=*)
eval ${item%%=*}=\"${item#*=}\"
;;
*) do_error "check_for: incorrect parameters: '${item}'";;
esac
done
case "${prog}:${inc}:${lib}" in
?*:?*:|?*::?*|:?*:?*|?*:?*:?*)
if [ -n "${var}" ]; then
do_error "check_for: the use of var is not compatible with passing several of [prog|inc|lib] at once"
fi
;;
::) do_error "check_for: [prog|inc|lib] is mandatory";;
esac
if [ -n "${var}" ]; then
add_to_var_list "${var}"
fi
if [ -n "${kconfig}" ]; then
add_to_kconfig_list "${kconfig}"
fi
if [ "${skip}" = "y" ]; then
return 0
fi
if [ -n "${prog}" ]; then
for item in ${prog}; do
printf "Checking for '${item}'... "
if [ -n "${var}" ]; then
eval val="\${${var}}"
if [ -n "${val}" ]; then
status="${val} (cached)\n"
where="${val}"
break
fi
fi
where="$( which "${item}" 2>/dev/null )"
if [ -z "${where}" ]; then
printf "no\n"
continue
elif [ -n "${ver}" ]; then
str=$( LC_ALL=C "${where}" --version 2>&1 \
|grep -E "${ver}" \
|head -n 1
)
if [ -z "${str}" ]; then
printf "no\n"
unset where
continue
fi
fi
status="${where}"
break
done
if [ -z "${status}" ]; then
return 1
fi
printf "${status}\n"
unset status
fi
if [ -n "${inc}" ]; then
for item in ${inc}; do
printf "Checking for '${item}'... "
if printf "#include \"${item}\"" |gcc -x c -c - -o /dev/null >/dev/null 2>&1; then
where="${item}"
status=yes
break;
fi
printf "no\n"
done
if [ -z "${status}" ]; then
return 1
fi
printf "${status}\n"
unset status
fi
if [ -n "${lib}" ]; then
if [ -z "${lib_exts}" ]; then
do_error "check_for: no library extension specified for '${lib}'"
fi
for item in ${lib}; do
for ext in ${lib_exts}; do
printf "Checking for '${item}.${ext}'... "
where="$( gcc -print-file-name="${item}.${ext}" )"
if [ "${where}" != "${item}.${ext}" ]; then
where="$( readlink "${where}" )"
status=yes
break 2;
fi
printf "no\n"
done
done
if [ -z "${status}" ]; then
return 1
fi
printf "${status}\n"
unset status
fi
if [ -n "${var}" ]; then
eval ${var}='"'"${where}"'"'
fi
if [ -n "${kconfig}" ]; then
eval ${kconfig}=y
fi
}
# This function checks for a tool, and aborts if not found
# See check_for(), above, for how to call has_or_abort
has_or_abort() {
# We declare these 6 variables here, although they are
# set in check_for(), called below
local prog inc lib
local var ver err kconfig
if ! check_for "$@"; then
printf " * A mandatory dependency is missing, or version mis-match:\n"
printf " * - ${err:-${prog}${inc}${lib}: none found}\n"
if [ -n "${var}" ]; then
printf " * --> You can give the path to this tool using: --with-${var}=PATH\n"
fi
printf "\n"
# Bail out if --force is not specified
[ -z "${FORCE}" ] && do_error "Bailing out..."
printf "<* *>\n"
printf "<* FORCE in action: *>\n"
printf "<* Continuing despite missing pre-requisite *>\n"
printf "<* Prepare for breakage *>\n"
printf "<* *>\n"
printf "\n"
fi
}
# This function checks for a tool, and warns if not found
# See check_for(), above, for how to call has_or_abort
# Note: if err is not set, then no error message is printed
has_or_warn() {
# We declare these 6 variables here, although they are
# set in check_for(), called below
local prog inc lib
local var ver err kconfig
if ! check_for "$@"; then
printf " * An optional dependency is missing, some features will be disabled"
printf "${err:+:\n * - ${err}}\n"
if [ -n "${var}" ]; then
printf " * --> You can give the path to this tool using: --with-${var}=PATH\n"
fi
fi
}
do_help() {
cat <<__EOF__
\`configure' configures crosstool-NG-${VERSION} to adapt to many kind of systems.
USAGE: ./configure [OPTION]...
Defaults for the options are specified in brackets.
Configuration:
-h, --help display this help and exit
--force force configure to continue, even in case
some pre-requisites are missing
Installation directories:
--prefix=PREFIX install files in PREFIX [${PREFIX_DEFAULT}]
--local don't install, and use current directory
By default, \`make install' will install all the files in
\`${PREFIX_DEFAULT}/bin', \`${PREFIX_DEFAULT}/lib' etc. You can specify
an installation prefix other than \`${PREFIX_DEFAULT}' using \`--prefix',
for instance \`--prefix=\${HOME}'.
For better control, use the options below.
Note: options marked as \`ignored' are recognised, but not acted upon, as
they make no sense for crosstool-NG, or they are not implemented yet.
Fine tuning of the installation directories:
--bindir=DIR user executables [PREFIX/bin]
--libdir=DIR object code libraries [PREFIX/lib]
--docdir=DIR info documentation [PREFIX/share/doc]
--mandir=DIR man documentation [PREFIX/share/man]
--infodir=DIR info documentation [DATAROOTDIR/info] (ignored)
--datadir=DIR read-only architecture-independent data [DATAROOTDIR]
(ignored)
--sysconfdir=DIR read-only single-machine data [PREFIX/etc] (ignored)
--localstatedir=DIR modifiable single-machine data [PREFIX/var] (ignored)
Program names:
--program-prefix=PREFIX prepend PREFIX to installed program names
--program-suffix=SUFFIX append SUFFIX to installed program names
--program-transform-name=PROGRAM run sed PROGRAM on installed program names
System types:
--build=BUILD configure for building on BUILD [guessed] (ignored)
--host=HOST cross-compile to build programs to run on HOST [BUILD]
(ignored)
Optional Features:
--enable-shared[=PKGS] build shared libraries [default=yes] (ignored)
--enable-static[=PKGS] build static libraries [default=yes] (ignored)
Optional Packages:
--with-install=PATH Specify the full PATH to GNU install
--with-make=PATH Specify the full PATH to GNU make >= 3.80
--with-grep=PATH Specify the full PATH to GNU grep
--with-sed=PATH Specify the full PATH to GNU sed
--with-bash=PATH Specify the full PATH to bash >= 3.0
__EOF__
}
#---------------------------------------------------------------------
# Set user's options
while [ $# -ne 0 ]; do
case "$1" in
--local) LOCAL_set="y"; shift;;
--prefix*) set_prefix "$1" "$2" && shift || shift 2;;
--bindir*) set_bindir "$1" "$2" && shift || shift 2;;
--libdir*) set_libdir "$1" "$2" && shift || shift 2;;
--docdir*) set_docdir "$1" "$2" && shift || shift 2;;
--mandir*) set_mandir "$1" "$2" && shift || shift 2;;
--with-*) set_tool "$1" "$2" && shift || shift 2;;
--program-prefix=*|--program-prefix)
set_program_prefix "$1" "$2" && shift || shift 2
;;
--program-suffix=*|--program-suffix)
set_program_suffix "$1" "$2" && shift || shift 2
;;
--program-transform-name=*|--program-transform-name)
set_program_transform_name "$1" "$2" && shift || shift 2
;;
--force) FORCE=1; shift;;
--help|-h) do_help; exit 0;;
# Skip, auto-stuff compatibility
--build=*|--host=*|--infodir=*|--datadir=*|--sysconfdir=*|--localstatedir=*) shift;;
--build|--host|--infodir|--datadir|--sysconfdir|--localstatedir) shift 2;;
--enable-shared|--disable-shared|--enable-static|--disable-static) shift;;
*) printf "Unrecognised option: '${1}'\n"; do_help; exit 1;;
esac
done
# Use defaults
[ -z "${PREFIX}" ] && set_prefix "" "${PREFIX_DEFAULT}"
# Special case when installing locally
if [ "${LOCAL_set}" = "y" ]; then
set_prefix "" "$( pwd )"
set_bindir "" "$( pwd )"
set_libdir "" "$( pwd )"
set_docdir "" "$( pwd )/docs"
set_mandir "" "$( pwd )/docs"
set_program_prefix "" ""
set_program_suffix "" ""
set_program_transform_name "" ""
fi
#---------------------------------------------------------------------
# Some sanity checks, now
# We check for grep and sed manually, because they are used in check_for()
printf "Checking for 'grep'... "
if [ -n "${grep}" ]; then
printf "${grep} (cached)\n"
else
grep="$( which grep 2>/dev/null )"
if [ -z "${grep}" ]; then
printf "not found\n"
else
printf "${grep}\n"
printf "Checking whether '${grep}' supports -E... "
if echo 'foo' |"${grep}" -E 'foo' >/dev/null 2>&1; then
printf "yes\n"
else
printf "no\n"
grep=
fi
fi
fi
if [ -z "${grep}" ]; then
printf "Either you are missing entirely the needed tool,\n"
printf "or the version you have is too old.\n"
printf "You can give the path to this tool using: --with-grep=PATH\n"
do_error "Bailing out..."
fi
add_to_var_list grep
printf "Checking for 'sed'... "
if [ -n "${sed}" ]; then
printf "${sed} (cached)\n"
else
sed="$( which sed 2>/dev/null )"
if [ -z "${sed}" ]; then
printf "not found\n"
else
printf "${sed}\n"
printf "Checking whether '${sed}' supports -i and -e... "
touch .ct-ng.sed.test
if "${sed}" -r -i -e 's/foo/bar/' .ct-ng.sed.test >/dev/null 2>&1; then
printf "yes\n"
else
printf "no\n"
sed=
fi
rm -f .ct-ng.sed.test
fi
fi
if [ -z "${sed}" ]; then
printf "Either you are missing entirely the needed tool,\n"
printf "or the version you have is too old.\n"
printf "You can give the path to this tool using: --with-sed=PATH\n"
do_error "Bailing out..."
fi
add_to_var_list sed
# The regular list of tools we can now easily check for
has_or_abort prog=bash \
var=bash \
ver='^GNU bash, version (3\.[1-9]|4)' \
err="'bash' 3.1 or above was not found"
has_or_abort prog=cut
has_or_abort prog=install var=install
has_or_abort prog=make \
var=make \
ver='^GNU Make (3.[89][[:digit:]]|[4-9])' \
err="GNU 'make' 3.80 or above was not found"
has_or_abort prog=gcc
has_or_abort prog="awk gawk" ver='^GNU Awk' err="GNU 'awk' was not found"
has_or_abort prog=bison
has_or_abort prog=flex
has_or_abort prog=makeinfo
has_or_abort prog=automake \
ver='\(GNU automake\) (1\.[[:digit:]]{2,}|[2-9][[:digit:]]*\.)' \
err="'automake' 1.10 or above was not found"
has_or_abort prog=libtool \
var=libtool \
ver='\(GNU libtool.*\) (2[[:digit:]]*\.|1\.6[[:digit:]]*\.|1\.5\.[2-9][[:digit:]]+)' \
err="'libtool' 1.5.26 or above was not found"
has_or_abort prog=libtoolize \
var=libtoolize \
ver='\(GNU libtool.*\) (2[[:digit:]]*\.|1\.6[[:digit:]]*\.|1\.5\.[2-9][[:digit:]]+)' \
err="'libtoolize' 1.5.26 or above was not found"
has_or_abort prog=stat
has_or_abort prog="curl"
has_or_abort prog=patch
has_or_abort prog=tar
has_or_abort prog=gzip
has_or_abort prog=bzip2
has_or_warn prog=xz \
kconfig=has_xzutils \
err="xz-compressed tarballs will not be used"
has_or_warn prog=lzma \
kconfig=has_lzma \
skip="${has_xzutils}" \
err="lzma-compressed tarballs will not be used"
has_or_abort prog=readlink
has_or_abort prog=objcopy var=objcopy
has_or_abort prog=objdump var=objdump
has_or_abort prog=readelf var=readelf
has_or_abort prog=patch var=patch
has_or_warn prog=cvs \
kconfig=has_cvs \
err="it will not be possible to use newlib cvs snapshots"
has_or_warn prog=svn \
kconfig=has_svn \
err="subversion is required to download eglibc"
# Library checks
libs_exts="so dylib a"
ncurses_hdrs="ncurses/ncurses.h ncurses/curses.h ncurses.h curses.h"
ncurses_libs="libncursesw libncurses libcurses"
has_or_abort lib="${ncurses_libs}" \
lib_exts="${libs_exts}" \
inc="${ncurses_hdrs}" \
err="The 'ncurses' library is needed fo the menuconfig frontend"
#---------------------------------------------------------------------
# Compute the version string
# If this version is n hg clone, try to get the revision number
# If we can't get the revision number, use date
printf "\nComputing version string... "
# Pass the version to the version helper script, if present, to compute
# a local version string, if needed.
if [ -f version.sh -a -x version.sh ]; then
V="$( ./version.sh "${VERSION}" 2>/dev/null |head -n 1 )"
fi
# If the script returns an empty string, revert to using the version
# we just computed, above.
if [ -n "${V}" ]; then
VERSION="${V}"
else
case "${VERSION}" in
*+hg|hg)
REVISION="$( hg id -n 2>/dev/null || true )"
case "${REVISION}" in
"")
VERSION="${VERSION}_unknown@$( date +%Y%m%d.%H%M%S )";;
*)
VERSION="${VERSION}_$( hg id -b )@${REVISION%%+}_$( hg id -i )"
;;
esac
# Arrange to have no / in the directory name, no need to create an
# arbitrarily deep directory structure
VERSION="$( printf "${VERSION}\n" |"${sed}" -r -e 's|/+|_|g;' )"
;;
esac
fi
printf "${VERSION}\n"
#---------------------------------------------------------------------
# Compute and check install paths
# Now we have the version string, we can build up the paths
[ -z "${BINDIR_set}" ] && BINDIR="${PREFIX}/bin"
[ -z "${LIBDIR_set}" ] && LIBDIR="${PREFIX}/lib"
[ -z "${DOCDIR_set}" ] && DOCDIR="${PREFIX}/share/doc"
[ -z "${MANDIR_set}" ] && MANDIR="${PREFIX}/share/man"
# Install support files in our own sub-dir, so as not to mangle (system)
# files and dirs, but only if not --local
if [ -z "${LOCAL_set}" ]; then
LIBDIR="${LIBDIR}/ct-ng-${VERSION}"
DOCDIR="${DOCDIR}/ct-ng-${VERSION}"
fi
# Check that install PATHs are absolute
for p in BIN LIB DOC MAN; do
var="${p}DIR"
eval v='"${'"${var}"'}"'
case "${v}" in
/*) ;;
*) do_error "'${var}' is not an absolute path: '${v}'";;
esac
done
case "${PROG_PFX}" in
*/*) do_error "program prefix '${PROG_PFX}' contains a '/'";;
esac
case "${PROG_SFX}" in
*/*) do_error "program suffix '${PROG_SFX}' contains a '/'";;
esac
#---------------------------------------------------------------------
# That's all, folks!
printf "Building up Makefile... "
var_sed="$( for var_name in ${var_list}; do
eval echo 's,@@${var_name}@@,${'"${var_name}"'},g'
done
)"
kconfig_sed="s/@@KCONFIG@@/$( for k_name in ${kconfig_list}; do
eval printf \"${k_name}=\${${k_name}} \"
done
)/"
"${sed}" -r -e "s,@@BINDIR@@,${BINDIR},g" \
-e "s,@@LIBDIR@@,${LIBDIR},g" \
-e "s,@@DOCDIR@@,${DOCDIR},g" \
-e "s,@@MANDIR@@,${MANDIR},g" \
-e "s,@@PROG_PFX@@,${PROG_PFX},g" \
-e "s,@@PROG_SFX@@,${PROG_SFX},g" \
-e "s,@@PROG_SED@@,${PROG_SED},g" \
-e "s,@@VERSION@@,${VERSION},g" \
-e "s,@@DATE@@,${DATE},g" \
-e "s,@@LOCAL@@,${LOCAL_set},g" \
-e "${var_sed}" \
-e "${kconfig_sed}" \
Makefile.in \
>Makefile
echo "done"
cat <<__EOF__
crosstool-NG configured as follows:
PREFIX='${PREFIX}'
BINDIR='${BINDIR}'
LIBDIR='${LIBDIR}'
DOCDIR='${DOCDIR}'
MANDIR='${MANDIR}'
PROG_PFX='${PROG_PFX}'
PROG_SFX='${PROG_SFX}'
PROG_SED='${PROG_SED}'
Now run:
make
__EOF__
if [ "${LOCAL_set}" != "y" ]; then
printf " make install\n"
fi