1 #!/bin/bash
   2 #
   3 # Copyright (c) 2011, 2017, Oracle and/or its affiliates. All rights reserved.
   4 # DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
   5 #
   6 # This code is free software; you can redistribute it and/or modify it
   7 # under the terms of the GNU General Public License version 2 only, as
   8 # published by the Free Software Foundation.
   9 #
  10 # This code is distributed in the hope that it will be useful, but WITHOUT
  11 # ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
  12 # FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
  13 # version 2 for more details (a copy is included in the LICENSE file that
  14 # accompanied this code).
  15 #
  16 # You should have received a copy of the GNU General Public License version
  17 # 2 along with this work; if not, write to the Free Software Foundation,
  18 # Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
  19 #
  20 # Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
  21 # or visit www.oracle.com if you need additional information or have any
  22 # questions.
  23 #
  24 
  25 generate_configure_script() {
  26   # First create a header
  27   cat > $1 << EOT
  28 #!/bin/bash
  29 #
  30 # ##########################################################
  31 # ### THIS FILE IS AUTOMATICALLY GENERATED. DO NOT EDIT. ###
  32 # ##########################################################
  33 #
  34 EOT
  35   # Then replace "magic" variables in configure.ac and append the output
  36   # from autoconf. $2 is either cat (just a no-op) or a filter.
  37   cat $script_dir/configure.ac | sed -e "s|@DATE_WHEN_GENERATED@|$TIMESTAMP|" | \
  38       eval $2 | ${AUTOCONF} -W all -I$script_dir - >> $1
  39   rm -rf autom4te.cache
  40 }
  41 
  42 script_dir=`dirname $0`
  43 
  44 # Create a timestamp as seconds since epoch
  45 if test "x`uname -s`" = "xSunOS"; then
  46   TIMESTAMP=`date +%s`
  47   if test "x$TIMESTAMP" = "x%s"; then
  48     # date +%s not available on this Solaris, use workaround from nawk(1):
  49     TIMESTAMP=`nawk 'BEGIN{print srand()}'`
  50   fi
  51 else
  52   TIMESTAMP=`date +%s`
  53 fi
  54 
  55 AUTOCONF="`which autoconf 2> /dev/null | grep -v '^no autoconf in'`"
  56 
  57 if test "x${AUTOCONF}" = x; then
  58   echo "You need autoconf installed to be able to regenerate the configure script"
  59   echo "Error: Cannot find autoconf" 1>&2
  60   exit 1
  61 fi
  62 
  63 autoconf_version=`$AUTOCONF --version | head -1`
  64 echo "Using autoconf at ${AUTOCONF} [$autoconf_version]"
  65 
  66 echo "Generating generated-configure.sh"
  67 generate_configure_script "$script_dir/generated-configure.sh" 'cat'
  68 
  69 if test "x$CUSTOM_CONFIG_DIR" != "x"; then
  70   custom_hook=$CUSTOM_CONFIG_DIR/custom-hook.m4
  71   if test ! -e $custom_hook; then
  72     echo "CUSTOM_CONFIG_DIR set but $CUSTOM_CONFIG_DIR/custom-hook.m4 not present"
  73     echo "Error: Cannot continue" 1>&2
  74     exit 1
  75   fi
  76 
  77   # We have custom sources available; also generate configure script
  78   # with custom hooks compiled in.
  79   echo "Generating custom generated-configure.sh"
  80   generate_configure_script "$CUSTOM_CONFIG_DIR/generated-configure.sh" 'sed -e "s|#CUSTOM_AUTOCONF_INCLUDE|m4_include([$custom_hook])|"'
  81 fi