| 1 | #! /bin/sh |
| 2 | # $Cambridge: exim/src/scripts/Configure-Makefile,v 1.2 2005/09/19 14:42:31 ph10 Exp $ |
| 3 | |
| 4 | # Shell script to build Makefile in a build directory. It must be called |
| 5 | # from inside the directory. It does its own checking of when to rebuild; it |
| 6 | # just got too horrendous to get it right in "make", because of the optionally |
| 7 | # existing configuration files. |
| 8 | |
| 9 | |
| 10 | # First off, get the OS type, and check that there is a make file for it. |
| 11 | |
| 12 | ostype=`../scripts/os-type -generic` || exit 1 |
| 13 | |
| 14 | if [ ! -r ../OS/Makefile-$ostype ] ; then |
| 15 | echo "" |
| 16 | echo "*** Sorry - operating system $ostype is not supported" |
| 17 | echo "*** See OS/Makefile-* for supported systems" 1>&2 |
| 18 | echo "" |
| 19 | exit 1 |
| 20 | fi |
| 21 | |
| 22 | # We also need the architecture type, in order to test for any architecture- |
| 23 | # specific configuration files. |
| 24 | |
| 25 | archtype=`../scripts/arch-type` || exit 1 |
| 26 | |
| 27 | # Now test for either the non-existence of Makefile, or for any of its |
| 28 | # components being newer. Note that the "newer" script gives the right |
| 29 | # answer (for our purposes) when the first file is non-existent. |
| 30 | |
| 31 | editme=../Local/Makefile |
| 32 | rebuild=yes |
| 33 | |
| 34 | if [ -f Makefile ] ; then |
| 35 | rebuild=no |
| 36 | if ../scripts/newer $editme Makefile || \ |
| 37 | ../scripts/newer $editme-$ostype Makefile || \ |
| 38 | ../scripts/newer $editme-$archtype Makefile || \ |
| 39 | ../scripts/newer $editme-$ostype-$archtype Makefile || \ |
| 40 | ../scripts/newer ../scripts/Configure-Makefile Makefile || \ |
| 41 | ../scripts/newer ../OS/Makefile-Base Makefile || \ |
| 42 | ../scripts/newer ../OS/Makefile-Default Makefile |
| 43 | then |
| 44 | rebuild=yes |
| 45 | fi |
| 46 | fi |
| 47 | |
| 48 | # If the "build" variable is set it means that a build name was explicitly |
| 49 | # given. Arrange to pick up a build-specific configuration file. |
| 50 | |
| 51 | if [ "X$build" != "X" ] ; then |
| 52 | mfb=Local/Makefile-$build |
| 53 | if ../scripts/newer $editme-$build Makefile ; then |
| 54 | rebuild=yes |
| 55 | fi |
| 56 | else |
| 57 | mfb= |
| 58 | fi |
| 59 | |
| 60 | |
| 61 | # If Makefile is up-to-date, no need to rebuild it. |
| 62 | |
| 63 | if [ $rebuild = no ] ; then |
| 64 | echo "\`Makefile' is up to date." |
| 65 | echo " " |
| 66 | exit |
| 67 | fi |
| 68 | |
| 69 | # Makefile needs to be rebuilt in the current directory by joining |
| 70 | # the generic default makefile, the OS base makefile, and then local |
| 71 | # generic, OS-specific, architecture-specific, and OS+architecture-specific |
| 72 | # makefiles, if they exist. These files all contain macro definitions, with |
| 73 | # later definitions overriding earlier ones. Make a temporary file first, in |
| 74 | # case things go wrong. A second temporary is needed for sorting out the |
| 75 | # default Perl stuff. Use short macro names to save typing. |
| 76 | |
| 77 | mf=Makefile |
| 78 | mft=$mf-t |
| 79 | mftt=$mf-tt |
| 80 | |
| 81 | # Ensure the temporary does not exist and start the new one by setting |
| 82 | # the OSTYPE and ARCHTYPE variables. |
| 83 | |
| 84 | rm -f $mft $mftt |
| 85 | (echo "OSTYPE=$ostype"; echo "ARCHTYPE=$archtype"; echo "") > $mft || exit 1 |
| 86 | |
| 87 | # Now concatenate the files to the temporary file. Copy the files using sed to |
| 88 | # remove comments, blank lines, and trailing white space. |
| 89 | |
| 90 | # BEWARE: a tab character is needed in the sed command below. It has had |
| 91 | # a nasty tendency to get lost in the past, causing a problem if a tab has |
| 92 | # actually been present in one of the files. Use a variable to hold a space |
| 93 | # and a tab to keep the tab in one place. |
| 94 | |
| 95 | st=' ' |
| 96 | |
| 97 | for f in OS/Makefile-Default \ |
| 98 | OS/Makefile-$ostype \ |
| 99 | Local/Makefile \ |
| 100 | Local/Makefile-$ostype \ |
| 101 | Local/Makefile-$archtype \ |
| 102 | Local/Makefile-$ostype-$archtype \ |
| 103 | $mfb |
| 104 | do if test -r ../$f |
| 105 | then echo "# From $f" |
| 106 | sed "/^#/d;/^[$st]*\$/d;s/[$st]*\$//" ../$f || exit 1 |
| 107 | echo "# End of $f" |
| 108 | echo "" |
| 109 | fi |
| 110 | done >> $mft || exit 1 |
| 111 | |
| 112 | # See if there is a definition of EXIM_PERL in what we have built so far. |
| 113 | # If so, run Perl to find the default values for PERL_CC, PERL_CCOPTS, |
| 114 | # and PERL_LIBS. These need to be put at the top of the Makefile, so we rename |
| 115 | # what we have so far and then copy it afterwards. Use the value of PERL_COMMAND |
| 116 | # if it has been defined. |
| 117 | |
| 118 | EXIM_PERL=`grep EXIM_PERL $mft` |
| 119 | |
| 120 | PERL_COMMAND=`grep PERL_COMMAND $mft | sed -e "\\$!d;s/^[$st]*PERL_COMMAND[$st]*=[$st]*//"` |
| 121 | if [ "${PERL_COMMAND}" = "" ] ; then |
| 122 | PERL_COMMAND='perl' |
| 123 | fi |
| 124 | |
| 125 | if [ "${EXIM_PERL}" != "" ] ; then |
| 126 | testperl=`$PERL_COMMAND --version` |
| 127 | if [ "$testperl" = "" ] ; then |
| 128 | echo "*** EXIM_PERL is set, but '$PERL_COMMAND --version' failed" |
| 129 | exit 1 |
| 130 | fi |
| 131 | |
| 132 | mv $mft $mftt |
| 133 | echo "PERL_CC=`$PERL_COMMAND -MConfig -e 'print $Config{cc}'`" >>$mft |
| 134 | echo "PERL_CCOPTS=`$PERL_COMMAND -MExtUtils::Embed -e ccopts`" >>$mft |
| 135 | echo "PERL_LIBS=`$PERL_COMMAND -MExtUtils::Embed -e ldopts`" >>$mft |
| 136 | echo "" >>$mft |
| 137 | cat $mftt >> $mft |
| 138 | rm -f $mftt |
| 139 | fi |
| 140 | |
| 141 | # Record the build variable in the Makefile. |
| 142 | |
| 143 | echo "build=$build" >>$mft |
| 144 | echo "" >>$mft |
| 145 | |
| 146 | # Finally, join on the generic base make file, which contains the actual |
| 147 | # rules and stuff. |
| 148 | |
| 149 | echo "# From ../OS/Makefile-Base" >> $mft |
| 150 | cat ../OS/Makefile-Base >> $mft || exit 1 |
| 151 | |
| 152 | # If the new makefile is the same as the existing one, say so, and just |
| 153 | # update the timestamp. Otherwise remove the old and install the new. |
| 154 | |
| 155 | if [ -s $mf ] && cmp -s $mft $mf |
| 156 | then echo ">>> rebuilt $mf unchanged" |
| 157 | echo " " |
| 158 | touch $mf || exit |
| 159 | rm -f $mft |
| 160 | elif rm -f $mf |
| 161 | mv $mft $mf |
| 162 | then echo ">>> New $mf installed" |
| 163 | echo '>>> Use "make makefile" if you need to force rebuilding of the makefile' |
| 164 | echo " " |
| 165 | else echo " " |
| 166 | echo "*** Failed to install $mf - see $mft" |
| 167 | echo " " |
| 168 | exit 1; |
| 169 | fi |
| 170 | |
| 171 | # End of Configure-Makefile |