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
  46 ## $1 = program, eg "autoconf".
  47 ## Echo the version string, eg "2.59".
  48 ## FIXME does not handle things like "1.4a", but AFAIK those are
  49 ## all old versions, so it is OK to fail there.
  50 ## Also note that we do not handle micro versions.
  51 get_version ()
  52 {
  53     ## Remove eg "./autogen.sh: line 50: autoconf: command not found".
  54     $1 --version 2>&1 | sed -e '/not found/d' -e 's/.* //' -n -e '1 s/\([0-9][0-9\.]*\).*/\1/p'
  55 }
  56
  57 ## $1 = version string, eg "2.59"
  58 ## Echo the major version, eg "2".
  59 major_version ()
  60 {
  61     echo $1 | sed -e 's/\([0-9][0-9]*\)\..*/\1/'
  62 }
  63
  64 ## $1 = version string, eg "2.59"
  65 ## Echo the minor version, eg "59".
  66 minor_version ()
  67 {
  68     echo $1 | sed -e 's/[0-9][0-9]*\.\([0-9][0-9]*\).*/\1/'
  69 }
  70
  71 ## $1 = program
  72 ## $2 = minimum version.
  73 ## Return 0 if program is present with version >= minimum version.
  74 ## Return 1 if program is missing.
  75 ## Return 2 if program is present but too old.
  76 ## Return 3 for unexpected error (eg failed to parse version).
  77 check_version ()
  78 {
  79     ## Respect eg $AUTOMAKE if it is set, like autoreconf does.
  80     uprog=`echo $1 | sed -e 's/-/_/g' -e 'y/abcdefghijklmnopqrstuvwxyz/ABCDEFGHIJKLMNOPQRSTUVWXYZ/'`
  81
  82     eval uprog=\$${uprog}
  83
  84     [ x"$uprog" = x ] && uprog=$1
  85
  86     have_version=`get_version $uprog`
  87
  88     [ x"$have_version" = x ] && return 1
  89
  90     have_maj=`major_version $have_version`
  91     need_maj=`major_version $2`
  92
  93     [ x"$have_maj" != x ] && [ x"$need_maj" != x ] || return 3
  94
  95     [ $have_maj -gt $need_maj ] && return 0
  96     [ $have_maj -lt $need_maj ] && return 2
  97
  98     have_min=`minor_version $have_version`
  99     need_min=`minor_version $2`
 100
 101     [ x"$have_min" != x ] && [ x"$need_min" != x ] || return 3
 102
 103     [ $have_min -ge $need_min ] && return 0
 104     return 2
 105 }
 106
 107
 108 cat <<EOF
 109 Checking whether you have the necessary tools...
 110 (Read INSTALL.REPO for more details on building Emacs)
 111
 112 EOF
 113
 114 missing=
 115
 116 for prog in $progs; do
 117
 118     sprog=`echo "$prog" | sed 's/-/_/g'`
 119
 120     eval min=\$${sprog}_min
 121
 122     echo "Checking for $prog (need at least version $min)..."
 123
 124     check_version $prog $min
 125
 126     retval=$?
 127
 128     case $retval in
 129         0) stat="ok" ;;
 130         1) stat="missing" ;;
 131         2) stat="too old" ;;
 132         *) stat="unable to check" ;;
 133     esac
 134
 135     echo $stat
 136
 137     if [ $retval -ne 0 ]; then
 138         missing="$missing $prog"
 139         eval ${sprog}_why=\""$stat"\"
 140     fi
 141
 142 done
 143
 144
 145 if [ x"$missing" != x ]; then
 146
 147     cat <<EOF
 148
 149 Building Emacs from Bzr requires the following specialized programs:
 150 EOF
 151
 152     for prog in $progs; do
 153         sprog=`echo "$prog" | sed 's/-/_/g'`
 154
 155         eval min=\$${sprog}_min
 156
 157         echo "$prog (minimum version $min)"
 158     done
 159
 160
 161     cat <<EOF
 162
 163 Your system seems to be missing the following tool(s):
 164 EOF
 165
 166     for prog in $missing; do
 167         sprog=`echo "$prog" | sed 's/-/_/g'`
 168
 169         eval why=\$${sprog}_why
 170
 171         echo "$prog ($why)"
 172     done
 173
 174     cat <<EOF
 175
 176 If you think you have the required tools, please add them to your PATH
 177 and re-run this script.
 178
 179 Otherwise, please try installing them.
 180 On systems using rpm and yum, try: "yum install PACKAGE"
 181 On systems using dpkg and apt, try: "apt-get install PACKAGE"
 182 Then re-run this script.
 183
 184 If you do not have permission to do this, or if the version provided
 185 by your system is too old, it is normally straightforward to build
 186 these packages from source.  You can find the sources at:
 187
 188 ftp://ftp.gnu.org/gnu/PACKAGE/
 189
 190 Download the package (make sure you get at least the minimum version
 191 listed above), extract it using tar, then run configure, make,
 192 make install.  Add the installation directory to your PATH and re-run
 193 this script.
 194
 195 If you know that the required versions are in your PATH, but this
 196 script has made an error, then you can simply run
 197
 198 autoreconf -i -I m4
 199
 200 instead of this script.
 201
 202 Please report any problems with this script to bug-gnu-emacs@gnu.org .
 203 EOF
 204
 205     exit 1
 206 fi
 207
 208 echo "Your system has the required tools, running autoreconf..."
 209
 210
 211 ## Let autoreconf figure out what, if anything, needs doing.
 212 ## Use autoreconf's -f option in case autoreconf itself has changed.
 213 autoreconf -f -i -I m4 || exit $?
 214
 215 ## Create a timestamp, so that './autogen.sh; make' doesn't
 216 ## cause 'make' to needlessly run 'autoheader'.
 217 echo timestamp > src/stamp-h.in || exit
 218
 219 echo "You can now run \`./configure'."
 220
 221 exit 0
 222
 223 ### autogen.sh ends here