src/scripts/Configure-Makefile

   1 #! /bin/sh
   2
   3 # Shell script to build Makefile in a build directory. It must be called
   4 # from inside the directory. It does its own checking of when to rebuild; it
   5 # just got too horrendous to get it right in "make", because of the optionally
   6 # existing configuration files.
   7 #
   8 # Copyright (c) The Exim Maintainers 2016
   9
  10
  11 # First off, get the OS type, and check that there is a make file for it.
  12
  13 ostype=`../scripts/os-type -generic` || exit 1
  14
  15 if [ ! -r ../OS/Makefile-$ostype ] ; then
  16   echo ""
  17   echo "*** Sorry - operating system $ostype is not supported"
  18   echo "*** See OS/Makefile-* for supported systems" 1>&2
  19   echo ""
  20   exit 1
  21 fi
  22
  23 # We also need the architecture type, in order to test for any architecture-
  24 # specific configuration files.
  25
  26 archtype=`../scripts/arch-type` || exit 1
  27
  28 # Now test for either the non-existence of Makefile, or for any of its
  29 # components being newer. Note that the "newer" script gives the right
  30 # answer (for our purposes) when the first file is non-existent.
  31
  32 editme=../Local/Makefile
  33 rebuild=yes
  34
  35 if [ -f Makefile ] ; then
  36   rebuild=no
  37   if ../scripts/newer $editme Makefile || \
  38      ../scripts/newer $editme-$ostype Makefile || \
  39      ../scripts/newer $editme-$archtype Makefile || \
  40      ../scripts/newer $editme-$ostype-$archtype Makefile || \
  41      ../scripts/newer ../scripts/Configure-Makefile Makefile || \
  42      ../scripts/newer ../OS/Makefile-Base Makefile || \
  43      ../scripts/newer ../OS/Makefile-Default Makefile
  44   then
  45     rebuild=yes
  46   fi
  47 fi
  48
  49 # If the "build" variable is set it means that a build name was explicitly
  50 # given. Arrange to pick up a build-specific configuration file.
  51
  52 if [ "X$build" != "X" ] ; then
  53   mfb=Local/Makefile-$build
  54   if ../scripts/newer $editme-$build Makefile ; then
  55     rebuild=yes
  56   fi
  57 else
  58   mfb=
  59 fi
  60
  61
  62 # If Makefile is up-to-date, no need to rebuild it.
  63
  64 if [ $rebuild = no ] ; then
  65   echo "\`Makefile' is up to date."
  66   echo " "
  67   exit
  68 fi
  69
  70 # Makefile needs to be rebuilt in the current directory by joining
  71 # the generic default makefile, the OS base makefile, and then local
  72 # generic, OS-specific, architecture-specific, and OS+architecture-specific
  73 # makefiles, if they exist. These files all contain macro definitions, with
  74 # later definitions overriding earlier ones. Make a temporary file first, in
  75 # case things go wrong. A second temporary is needed for sorting out the
  76 # default Perl stuff. Use short macro names to save typing.
  77
  78 mf=Makefile
  79 mft=$mf-t
  80 mftt=$mf-tt
  81
  82 look_mf=lookups/Makefile
  83 look_mf_pre=${look_mf}.predynamic
  84 look_mf_post=${look_mf}.postdynamic
  85
  86 # Ensure the temporary does not exist and start the new one by setting
  87 # the OSTYPE and ARCHTYPE variables.
  88
  89 rm -f $mft $mftt $look_mf-t
  90 (echo "OSTYPE=$ostype"; echo "ARCHTYPE=$archtype"; echo "") > $mft || exit 1
  91
  92 # Now concatenate the files to the temporary file. Copy the files using sed to
  93 # remove comments, blank lines, and trailing white space.
  94
  95 # BEWARE: a tab character is needed in the sed command below. It has had
  96 # a nasty tendency to get lost in the past, causing a problem if a tab has
  97 # actually been present in one of the files. Use a variable to hold a space
  98 # and a tab to keep the tab in one place.
  99
 100 st='     '
 101
 102 for f in OS/Makefile-Default \
 103          OS/Makefile-$ostype \
 104          Local/Makefile \
 105          Local/Makefile-$ostype \
 106          Local/Makefile-$archtype \
 107          Local/Makefile-$ostype-$archtype \
 108          $mfb
 109 do   if test -r ../$f
 110      then   echo "# From $f"
 111             sed "/^#/d;/^[$st]*\$/d;s/[$st]*\$//" ../$f || exit 1
 112             echo "# End of $f"
 113             echo ""
 114      fi
 115 done \
 116      | sed 's/^TMPDIR=/EXIM_&/' \
 117      >> $mft || exit 1
 118
 119 # handle pkg-config
 120 # beware portability of extended regexps with sed.
 121
 122 egrep "^[$st]*(AUTH|LOOKUP)_[A-Z0-9_]*[$st]*=[$st]*" $mft | \
 123   sed "s/[$st]*=/='/" | \
 124   sed "s/\$/'/" > $mftt
 125 egrep "^[$st]*((USE_(OPENSSL|GNUTLS)_PC)|SUPPORT_TLS|USE_GNUTLS|PCRE_CONFIG|AVOID_GNUTLS_PKCS11)[$st]*=[$st]*" $mft | \
 126   sed "s/[$st]*=/='/" | \
 127   sed "s/\$/'/" >> $mftt
 128 if test -s $mftt
 129 then
 130   (
 131   echo "# pkg-config fixups"
 132   . ./$mftt
 133   for var in `cut -d = -f 1 < $mftt`; do
 134     case $var in
 135
 136       USE_*_PC)
 137         eval "pc_value=\"\$$var\""
 138         need_this=''
 139         if [ ".$SUPPORT_TLS" = "." ]; then
 140           # no TLS, not referencing
 141           true
 142         elif [ ".$var" = ".USE_GNUTLS_PC" ] && [ ".$USE_GNUTLS" != "." ]; then
 143           need_this=t
 144         elif [ ".$var" = ".USE_OPENSSL_PC" ] && [ ".$USE_GNUTLS" = "." ]; then
 145           need_this=t
 146         fi
 147         if [ ".$need_this" != "." ]; then
 148           tls_include=`pkg-config --cflags $pc_value`
 149           if [ $? -ne 0 ]; then
 150             echo >&2 "*** Missing pkg-config for package $pc_value (for Exim $var build option)"
 151             exit 1
 152           fi
 153           tls_libs=`pkg-config --libs $pc_value`
 154           echo "TLS_INCLUDE=$tls_include"
 155           echo "TLS_LIBS=$tls_libs"
 156         fi
 157         ;;
 158
 159       *_PC)
 160         eval "pc_value=\"\$$var\""
 161         base=`echo $var | sed 's/_PC$//'`
 162         eval "basevalue=\"\$$base\""
 163         if [ ".$basevalue" = "." ]; then
 164           # not pulling in this module, _PC defined as default? Ignore
 165           true
 166         elif [ $basevalue = 2 ]; then
 167           # module; handled in scripts/lookups-Makefile
 168           true
 169         else
 170           # main binary
 171           cflags=`pkg-config --cflags $pc_value`
 172           if [ $? -ne 0 ]; then
 173             echo >&2 "*** Missing pkg-config for package $pc_value (for Exim $var build option)"
 174             exit 1
 175           fi
 176           libs=`pkg-config --libs $pc_value`
 177           if [ "$var" != "${var#LOOKUP_}" ]; then
 178             echo "LOOKUP_INCLUDE += $cflags"
 179             echo "LOOKUP_LIBS += $libs"
 180           elif [ "$var" != "${var#AUTH_}" ]; then
 181             echo "CFLAGS += $cflags"
 182             echo "AUTH_LIBS += $libs"
 183           else
 184             echo >&2 "Don't know how to handle pkg-config for $var"
 185           fi
 186         fi
 187         ;;
 188
 189       PCRE_CONFIG)
 190         case $PCRE_CONFIG in
 191           yes|YES|y|Y)
 192             cflags=`pcre-config --cflags`
 193             if [ $? -ne 0 ]; then
 194               echo >&2 "*** Missing pcre-config for regular expression support"
 195               exit 1
 196             fi
 197             libs=`pcre-config --libs`
 198             if [ ".$cflags" != "." ]; then
 199               echo "INCLUDE += $cflags"
 200             fi
 201             echo "PCRE_LIBS=$libs"
 202             ;;
 203         esac
 204         ;;
 205
 206       AVOID_GNUTLS_PKCS11)
 207         echo "$var=yes"
 208         ;;
 209
 210     esac
 211   done
 212   echo "# End of pkg-config fixups"
 213   echo
 214   ) >> $mft
 215   subexit=$?
 216   if [ $subexit -ne 0 ]; then
 217     exit $subexit
 218   fi
 219 fi
 220 rm -f $mftt
 221
 222 # make the lookups Makefile with the definitions
 223 # the auxiliary script generates $look_mf_post from $look_mf_pre
 224
 225 cp ../src/lookups/Makefile $look_mf_pre
 226 ../scripts/lookups-Makefile
 227
 228 # See if there is a definition of EXIM_PERL in what we have built so far.
 229 # If so, run Perl to find the default values for PERL_CC, PERL_CCOPTS,
 230 # and PERL_LIBS. These need to be put at the top of the Makefile, so we rename
 231 # what we have so far and then copy it afterwards. Use the value of PERL_COMMAND
 232 # if it has been defined.
 233
 234 EXIM_PERL=`grep EXIM_PERL $mft`
 235
 236 PERL_COMMAND=`grep PERL_COMMAND $mft | sed -e "\\$!d;s/^[$st]*PERL_COMMAND[$st]*=[$st]*//"`
 237 if [ "${PERL_COMMAND}" = "" ] ; then
 238   PERL_COMMAND='perl'
 239 fi
 240
 241 if [ "${EXIM_PERL}" != "" ] ; then
 242   testperl=`$PERL_COMMAND --version`
 243   if [ "$testperl" = "" ] ; then
 244     echo "*** EXIM_PERL is set, but '$PERL_COMMAND --version' failed"
 245     exit 1
 246   fi
 247
 248   EXTUTILS_EMBED_NOT_INSTALLED=`$PERL_COMMAND -MExtUtils::Embed -e ";" 2>&1`
 249   if [ "${EXTUTILS_EMBED_NOT_INSTALLED}" != "" ] ; then
 250     echo "Please install ExtUtils::Embed for $PERL_COMMAND"
 251     exit 1;
 252   fi
 253
 254   mv $mft $mftt
 255   echo "PERL_CC=`$PERL_COMMAND -MConfig -e 'print $Config{cc}'`" >>$mft
 256   echo "PERL_CCOPTS=`$PERL_COMMAND -MExtUtils::Embed -e ccopts`" >>$mft
 257   echo "PERL_LIBS=`$PERL_COMMAND -MExtUtils::Embed -e ldopts`" >>$mft
 258   echo "" >>$mft
 259   cat $mftt >> $mft
 260   rm -f $mftt
 261 fi
 262
 263 # Record the build variable in the Makefile.
 264
 265 echo "build=$build" >>$mft
 266 echo "" >>$mft
 267
 268 # Finally, join on the generic base make file, which contains the actual
 269 # rules and stuff.
 270
 271 echo "# From ../OS/Makefile-Base" >> $mft
 272 cat ../OS/Makefile-Base >> $mft || exit 1
 273
 274 # If the new makefile is the same as the existing one, say so, and just
 275 # update the timestamp. Otherwise remove the old and install the new.
 276
 277 if      [ -s $mf ] && cmp -s $mft $mf && [ -s $look_mf ] && cmp -s $look_mf_post $look_mf
 278 then    echo ">>> rebuilt $mf unchanged"
 279         echo " "
 280         touch $mf || exit
 281         rm -f $mft $look_mf_pre $look_mf_post
 282 elif    rm -f $mf $look_mf $look_mf_pre
 283         mv $mft $mf
 284         mv $look_mf_post $look_mf
 285 then    echo ">>> New $mf & $look_mf installed"
 286         echo '>>> Use "make makefile" if you need to force rebuilding of the makefile'
 287         echo " "
 288 else    echo " "
 289         echo "*** Failed to install $mf - see $mft"
 290         echo "    (or $look_mft)"
 291         echo " "
 292         exit 1;
 293 fi
 294
 295 # vim: set ft=sh :
 296 # End of Configure-Makefile