autogen.sh

   1 #!/bin/sh
   2 ### autogen.sh - tool to help build Emacs from a bzr checkout
   3
   4 ## Copyright (C) 2011-2014 Free Software Foundation, Inc.
   5
   6 ## Author: Glenn Morris <rgm@gnu.org>
   7 ## Maintainer: emacs-devel@gnu.org
   8
   9 ## This file is part of GNU Emacs.
  10
  11 ## GNU Emacs is free software: you can redistribute it and/or modify
  12 ## it under the terms of the GNU General Public License as published by
  13 ## the Free Software Foundation, either version 3 of the License, or
  14 ## (at your option) any later version.
  15
  16 ## GNU Emacs is distributed in the hope that it will be useful,
  17 ## but WITHOUT ANY WARRANTY; without even the implied warranty of
  18 ## MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  19 ## GNU General Public License for more details.
  20
  21 ## You should have received a copy of the GNU General Public License
  22 ## along with GNU Emacs.  If not, see <http://www.gnu.org/licenses/>.
  23
  24 ### Commentary:
  25
  26 ## The Emacs bzr repository does not include the configure script
  27 ## (and associated helpers).  The first time you fetch Emacs from bzr,
  28 ## run this script to generate the necessary files.
  29 ## For more details, see the file INSTALL.REPO.
  30
  31 ### Code:
  32
  33 ## Tools we need:
  34 ## Note that we respect the values of AUTOCONF etc, like autoreconf does.
  35 progs="autoconf automake pkg-config"
  36
  37 ## Minimum versions we need:
  38 autoconf_min=`sed -n 's/^ *AC_PREREQ(\([0-9\.]*\)).*/\1/p' configure.ac`
  39
  40 ## This will need improving if more options are ever added to the
  41 ## AM_INIT_AUTOMAKE call.
  42 automake_min=`sed -n 's/^ *AM_INIT_AUTOMAKE(\([0-9\.]*\)).*/\1/p' configure.ac`
  43
  44 pkg_config_min=`sed -n 's/^ *PKG_PROG_PKG_CONFIG(\([0-9\.]*\)).*/\1/p' configure.ac`
  45 # Building from the repository needs pkg-config 0.26 or later; see Bug#17438.
  46 case $pkg_config_min in
  47   0.[0-9] | 0.[0-9].* | 0.1[0-9] | 0.1[0-9].* | 0.2[0-5] | 0.2[0-5].* )
  48     pkg_config_min=0.26
  49 esac
  50
  51 ## $1 = program, eg "autoconf".
  52 ## Echo the version string, eg "2.59".
  53 ## FIXME does not handle things like "1.4a", but AFAIK those are
  54 ## all old versions, so it is OK to fail there.
  55 ## Also note that we do not handle micro versions.
  56 get_version ()
  57 {
  58     ## Remove eg "./autogen.sh: line 50: autoconf: command not found".
  59     $1 --version 2>&1 | sed -e '/not found/d' -e 's/.* //' -n -e '1 s/\([0-9][0-9\.]*\).*/\1/p'
  60 }
  61
  62 ## $1 = version string, eg "2.59"
  63 ## Echo the major version, eg "2".
  64 major_version ()
  65 {
  66     echo $1 | sed -e 's/\([0-9][0-9]*\)\..*/\1/'
  67 }
  68
  69 ## $1 = version string, eg "2.59"
  70 ## Echo the minor version, eg "59".
  71 minor_version ()
  72 {
  73     echo $1 | sed -e 's/[0-9][0-9]*\.\([0-9][0-9]*\).*/\1/'
  74 }
  75
  76 ## $1 = program
  77 ## $2 = minimum version.
  78 ## Return 0 if program is present with version >= minimum version.
  79 ## Return 1 if program is missing.
  80 ## Return 2 if program is present but too old.
  81 ## Return 3 for unexpected error (eg failed to parse version).
  82 check_version ()
  83 {
  84     ## Respect eg $AUTOMAKE if it is set, like autoreconf does.
  85     uprog=`echo $1 | sed -e 's/-/_/g' -e 'y/abcdefghijklmnopqrstuvwxyz/ABCDEFGHIJKLMNOPQRSTUVWXYZ/'`
  86
  87     eval uprog=\$${uprog}
  88
  89     [ x"$uprog" = x ] && uprog=$1
  90
  91     have_version=`get_version $uprog`
  92
  93     [ x"$have_version" = x ] && return 1
  94
  95     have_maj=`major_version $have_version`
  96     need_maj=`major_version $2`
  97
  98     [ x"$have_maj" != x ] && [ x"$need_maj" != x ] || return 3
  99
 100     [ $have_maj -gt $need_maj ] && return 0
 101     [ $have_maj -lt $need_maj ] && return 2
 102
 103     have_min=`minor_version $have_version`
 104     need_min=`minor_version $2`
 105
 106     [ x"$have_min" != x ] && [ x"$need_min" != x ] || return 3
 107
 108     [ $have_min -ge $need_min ] && return 0
 109     return 2
 110 }
 111
 112
 113 cat <<EOF
 114 Checking whether you have the necessary tools...
 115 (Read INSTALL.REPO for more details on building Emacs)
 116
 117 EOF
 118
 119 missing=
 120
 121 for prog in $progs; do
 122
 123     sprog=`echo "$prog" | sed 's/-/_/g'`
 124
 125     eval min=\$${sprog}_min
 126
 127     echo "Checking for $prog (need at least version $min)..."
 128
 129     check_version $prog $min
 130
 131     retval=$?
 132
 133     case $retval in
 134         0) stat="ok" ;;
 135         1) stat="missing" ;;
 136         2) stat="too old" ;;
 137         *) stat="unable to check" ;;
 138     esac
 139
 140     echo $stat
 141
 142     if [ $retval -ne 0 ]; then
 143         missing="$missing $prog"
 144         eval ${sprog}_why=\""$stat"\"
 145     fi
 146
 147 done
 148
 149
 150 if [ x"$missing" != x ]; then
 151
 152     cat <<EOF
 153
 154 Building Emacs from Bzr requires the following specialized programs:
 155 EOF
 156
 157     for prog in $progs; do
 158         sprog=`echo "$prog" | sed 's/-/_/g'`
 159
 160         eval min=\$${sprog}_min
 161
 162         echo "$prog (minimum version $min)"
 163     done
 164
 165
 166     cat <<EOF
 167
 168 Your system seems to be missing the following tool(s):
 169 EOF
 170
 171     for prog in $missing; do
 172         sprog=`echo "$prog" | sed 's/-/_/g'`
 173
 174         eval why=\$${sprog}_why
 175
 176         echo "$prog ($why)"
 177     done
 178
 179     cat <<EOF
 180
 181 If you think you have the required tools, please add them to your PATH
 182 and re-run this script.
 183
 184 Otherwise, please try installing them.
 185 On systems using rpm and yum, try: "yum install PACKAGE"
 186 On systems using dpkg and apt, try: "apt-get install PACKAGE"
 187 Then re-run this script.
 188
 189 If you do not have permission to do this, or if the version provided
 190 by your system is too old, it is normally straightforward to build
 191 these packages from source.  You can find the sources at:
 192
 193 ftp://ftp.gnu.org/gnu/PACKAGE/
 194
 195 Download the package (make sure you get at least the minimum version
 196 listed above), extract it using tar, then run configure, make,
 197 make install.  Add the installation directory to your PATH and re-run
 198 this script.
 199
 200 If you know that the required versions are in your PATH, but this
 201 script has made an error, then you can simply run
 202
 203 autoreconf -fi -I m4
 204
 205 instead of this script.
 206
 207 Please report any problems with this script to bug-gnu-emacs@gnu.org .
 208 EOF
 209
 210     exit 1
 211 fi
 212
 213 # If automake is installed in a nonstandard location, find the standard
 214 # location if possible and append it to ACLOCAL_PATH.  That way, it will
 215 # find the pkg.m4 that is installed in the standard location.
 216 echo "Checking for pkg.m4..."
 217 AUTORECONF_ENV=
 218 env_space=
 219 ac_dir=`aclocal --print-ac-dir` || {
 220     cat <<EOF
 221 There was a problem running 'aclocal --print-ac-dir'.
 222 The aclocal program is part of automake.
 223 Please check your automake installation.
 224 EOF
 225
 226     exit 1
 227 }
 228
 229 test -n "$ac_dir" && test -r "$ac_dir/pkg.m4" || {
 230
 231   # Maybe ACLOCAL_PATH is already set-up.
 232   if test -n "$ACLOCAL_PATH"; then
 233     oIFS=$IFS
 234     IFS=:
 235     for dir in $ACLOCAL_PATH; do
 236       if test -r "$dir/pkg.m4"; then
 237         AUTORECONF_ENV="ACLOCAL_PATH='$ACLOCAL_PATH'"
 238         env_space=' '
 239         break
 240       fi
 241     done
 242     IFS=$oIFS
 243   fi
 244
 245   if test -z "$AUTORECONF_ENV"; then
 246     oIFS=$IFS
 247     IFS=:
 248     before_first_aclocal=true
 249     for dir in $PATH; do
 250       if test -x "$dir/aclocal"; then
 251         if $before_first_aclocal; then
 252           before_first_aclocal=false
 253         elif ac_dir=`"$dir/aclocal" --print-ac-dir` && test -r "$ac_dir/pkg.m4"
 254         then
 255           case $ACLOCAL_PATH in
 256             '') ACLOCAL_PATH=$ac_dir;;
 257             ?*) ACLOCAL_PATH=$ACLOCAL_PATH:$ac_dir;;
 258           esac
 259           export ACLOCAL_PATH
 260           AUTORECONF_ENV="ACLOCAL_PATH='$ACLOCAL_PATH'"
 261           env_space=' '
 262           break
 263         fi
 264       fi
 265     done
 266     IFS=$oIFS
 267   fi
 268
 269   ## OK, maybe pkg-config is in a weird place (eg on hydra).
 270   if test -z "$AUTORECONF_ENV"; then
 271     oIFS=$IFS
 272     IFS=:
 273     for dir in $PATH; do
 274       if test -x "$dir/pkg-config"; then
 275         ac_dir=`echo "$dir" | sed 's|bin$|share/aclocal|'`
 276         if test -r "$ac_dir/pkg.m4"; then
 277           case $ACLOCAL_PATH in
 278             '') ACLOCAL_PATH=$ac_dir;;
 279             ?*) ACLOCAL_PATH=$ACLOCAL_PATH:$ac_dir;;
 280           esac
 281           export ACLOCAL_PATH
 282           AUTORECONF_ENV="ACLOCAL_PATH='$ACLOCAL_PATH'"
 283           env_space=' '
 284           break
 285         fi
 286       fi
 287     done
 288     IFS=$oIFS
 289   fi
 290
 291   if test -z "$AUTORECONF_ENV"; then
 292     cat <<EOF
 293 The version of aclocal that you are using cannot find the pkg.m4 file that
 294 pkg-config provides.  If it is installed in some unusual directory /FOO/BAR,
 295 set ACLOCAL_PATH='/FOO/BAR' in the environment and run this script again.
 296 EOF
 297     exit 1
 298   fi
 299 }
 300 echo ok
 301
 302 echo 'Your system has the required tools.'
 303 echo "Running \"$AUTORECONF_ENV${env_space}autoreconf -fi -I m4\" ..."
 304
 305
 306 ## Let autoreconf figure out what, if anything, needs doing.
 307 ## Use autoreconf's -f option in case autoreconf itself has changed.
 308 autoreconf -fi -I m4 || exit $?
 309
 310 ## Create a timestamp, so that './autogen.sh; make' doesn't
 311 ## cause 'make' to needlessly run 'autoheader'.
 312 echo timestamp > src/stamp-h.in || exit
 313
 314 echo "You can now run \"./configure$env_space$AUTORECONF_ENV\"."
 315
 316 exit 0
 317
 318 ### autogen.sh ends here