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=$mf-tt
  81 mftepcp=$mf-tepcp
  82 mftepcp2=$mf-tepcp2
  83
  84 look_mf=lookups/Makefile
  85 look_mf_pre=${look_mf}.predynamic
  86 look_mf_post=${look_mf}.postdynamic
  87
  88 # Ensure the temporary does not exist and start the new one by setting
  89 # the OSTYPE and ARCHTYPE variables.
  90
  91 rm -f $mft $mftt $mftepcp $mftepcp2 $look_mf-t
  92 (echo "OSTYPE=$ostype"; echo "ARCHTYPE=$archtype"; echo "") > $mft || exit 1
  93
  94 # Now concatenate the files to the temporary file. Copy the files using sed to
  95 # remove comments, blank lines, and trailing white space.
  96
  97 # BEWARE: a tab character is needed in the sed command below. It has had
  98 # a nasty tendency to get lost in the past, causing a problem if a tab has
  99 # actually been present in one of the files. Use a variable to hold a space
 100 # and a tab to keep the tab in one place.
 101
 102 st='     '
 103
 104 for f in OS/Makefile-Default \
 105          OS/Makefile-$ostype \
 106          Local/Makefile \
 107          Local/Makefile-$ostype \
 108          Local/Makefile-$archtype \
 109          Local/Makefile-$ostype-$archtype \
 110          $mfb
 111 do   if test -r ../$f
 112      then   echo "# From $f"
 113             sed "/^#/d;/^[$st]*\$/d;s/[$st]*\$//" ../$f || exit 1
 114             echo "# End of $f"
 115             echo ""
 116      fi
 117 done \
 118      | sed 's/^TMPDIR=/EXIM_&/' \
 119      >> $mft || exit 1
 120
 121 # handle PKG_CONFIG_PATH because we need it in our env, and we want to handle
 122 # wildcards; note that this logic means all setting _appends_ values, never
 123 # replacing; if that's a problem, we can revisit.
 124 sed -n "s/^[$st]*PKG_CONFIG_PATH[$st]*[+]*=[$st]*//p" $mft | \
 125   sed "s/[$st]*\$//" >> $mftepcp
 126 if test -s ./$mftepcp
 127 then
 128   # expand any wildcards and strip spaces, to make it a real PATH-like variable
 129   ( IFS=":${IFS-$st}"; for P in `cat ./$mftepcp`; do echo "$P"; done ) | xargs | sed "s/[$st]/:/g" >./$mftepcp2
 130   sed "s/^/PKG_CONFIG_PATH='/" < ./$mftepcp2 | sed "s/\$/'/" > ./$mftepcp
 131   . ./$mftepcp
 132   export PKG_CONFIG_PATH
 133   egrep -v "^[$st]*PKG_CONFIG_PATH[$st]*=" ./$mft > ./$mftt
 134   rm -f ./$mft
 135   (
 136     echo "# Collapsed PKG_CONFIG_PATH in build-prep:"
 137     sed "s/'//g" ./$mftepcp
 138     echo "# End of collapsed PKG_CONFIG_PATH"
 139     echo ""
 140     cat ./$mftt
 141   ) > ./$mft
 142   rm -f ./$mftt
 143 fi
 144 rm -f ./$mftepcp ./$mftepcp2
 145
 146 # handle pkg-config
 147 # beware portability of extended regexps with sed.
 148 egrep "^[$st]*(AUTH|LOOKUP)_[A-Z0-9_]*[$st]*=[$st]*" $mft | \
 149   sed "s/[$st]*=/='/" | \
 150   sed "s/\$/'/" > $mftt
 151 egrep "^[$st]*((USE_(OPENSSL|GNUTLS)_PC)|SUPPORT_TLS|USE_GNUTLS|PCRE_CONFIG|AVOID_GNUTLS_PKCS11)[$st]*=[$st]*" $mft | \
 152   sed "s/[$st]*=/='/" | \
 153   sed "s/\$/'/" >> $mftt
 154 if test -s $mftt
 155 then
 156   (
 157   echo "# pkg-config fixups"
 158   . ./$mftt
 159   for var in `cut -d = -f 1 < $mftt`; do
 160     case $var in
 161
 162       USE_*_PC)
 163         eval "pc_value=\"\$$var\""
 164         need_this=''
 165         need_core=''
 166         if [ ".$SUPPORT_TLS" = "." ]; then
 167           # no TLS, not referencing
 168           true
 169         elif [ ".$var" = ".USE_GNUTLS_PC" ] && [ ".$USE_GNUTLS" != "." ]; then
 170           need_this=t
 171           need_core="gnutls-special"
 172         elif [ ".$var" = ".USE_OPENSSL_PC" ] && [ ".$USE_GNUTLS" = "." ]; then
 173           need_this=t
 174           need_core=t
 175         fi
 176         if [ ".$need_this" != "." ]; then
 177           tls_include=`pkg-config --cflags $pc_value`
 178           if [ $? -ne 0 ]; then
 179             echo >&2 "*** Missing pkg-config for package $pc_value (for Exim $var build option)"
 180             exit 1
 181           fi
 182           tls_libs=`pkg-config --libs $pc_value`
 183           echo "TLS_INCLUDE=$tls_include"
 184           echo "TLS_LIBS=$tls_libs"
 185           # With hash.h pulling crypto into the core, we need to also handle that
 186           if [ ".$need_this" = ".t" ]; then
 187             echo "CFLAGS += $tls_include"
 188             echo "LDFLAGS += $tls_libs"
 189           elif [ ".$need_this" = ".gnutls-special" ]; then
 190             if pkg-config --atleast-version=2.10 gnutls ; then
 191               echo "CFLAGS += $tls_include"
 192               echo "LDFLAGS += $tls_libs"
 193             else
 194               echo "CFLAGS += `libgcrypt-config --cflags`"
 195               echo "LDFLAGS += `libgcrypt-config --libs`"
 196             fi
 197           fi
 198         fi
 199         ;;
 200
 201       *_PC)
 202         eval "pc_value=\"\$$var\""
 203         base=`echo $var | sed 's/_PC$//'`
 204         eval "basevalue=\"\$$base\""
 205         if [ ".$basevalue" = "." ]; then
 206           # not pulling in this module, _PC defined as default? Ignore
 207           true
 208         elif [ $basevalue = 2 ]; then
 209           # module; handled in scripts/lookups-Makefile
 210           true
 211         else
 212           # main binary
 213           cflags=`pkg-config --cflags $pc_value`
 214           if [ $? -ne 0 ]; then
 215             echo >&2 "*** Missing pkg-config for package $pc_value (for Exim $var build option)"
 216             exit 1
 217           fi
 218           libs=`pkg-config --libs $pc_value`
 219           if [ "$var" != "${var#LOOKUP_}" ]; then
 220             echo "LOOKUP_INCLUDE += $cflags"
 221             echo "LOOKUP_LIBS += $libs"
 222           elif [ "$var" != "${var#AUTH_}" ]; then
 223             echo "CFLAGS += $cflags"
 224             echo "AUTH_LIBS += $libs"
 225           else
 226             echo >&2 "Don't know how to handle pkg-config for $var"
 227           fi
 228         fi
 229         ;;
 230
 231       PCRE_CONFIG)
 232         case $PCRE_CONFIG in
 233           yes|YES|y|Y)
 234             cflags=`pcre-config --cflags`
 235             if [ $? -ne 0 ]; then
 236               echo >&2 "*** Missing pcre-config for regular expression support"
 237               exit 1
 238             fi
 239             libs=`pcre-config --libs`
 240             if [ ".$cflags" != "." ]; then
 241               echo "INCLUDE += $cflags"
 242             fi
 243             echo "PCRE_LIBS=$libs"
 244             ;;
 245         esac
 246         ;;
 247
 248       AVOID_GNUTLS_PKCS11)
 249         echo "$var=yes"
 250         ;;
 251
 252     esac
 253   done
 254   echo "# End of pkg-config fixups"
 255   echo
 256   ) >> $mft
 257   subexit=$?
 258   if [ $subexit -ne 0 ]; then
 259     exit $subexit
 260   fi
 261 fi
 262 rm -f $mftt
 263
 264 # make the lookups Makefile with the definitions
 265 # the auxiliary script generates $look_mf_post from $look_mf_pre
 266
 267 cp ../src/lookups/Makefile $look_mf_pre
 268 ../scripts/lookups-Makefile
 269
 270 # See if there is a definition of EXIM_PERL in what we have built so far.
 271 # If so, run Perl to find the default values for PERL_CC, PERL_CCOPTS,
 272 # and PERL_LIBS. These need to be put at the top of the Makefile, so we rename
 273 # what we have so far and then copy it afterwards. Use the value of PERL_COMMAND
 274 # if it has been defined.
 275
 276 EXIM_PERL=`grep EXIM_PERL $mft`
 277
 278 PERL_COMMAND=`grep PERL_COMMAND $mft | sed -e "\\$!d;s/^[$st]*PERL_COMMAND[$st]*=[$st]*//"`
 279 if [ "${PERL_COMMAND}" = "" ] ; then
 280   PERL_COMMAND='perl'
 281 fi
 282
 283 if [ "${EXIM_PERL}" != "" ] ; then
 284   testperl=`$PERL_COMMAND --version`
 285   if [ "$testperl" = "" ] ; then
 286     echo "*** EXIM_PERL is set, but '$PERL_COMMAND --version' failed"
 287     exit 1
 288   fi
 289
 290   EXTUTILS_EMBED_NOT_INSTALLED=`$PERL_COMMAND -MExtUtils::Embed -e ";" 2>&1`
 291   if [ "${EXTUTILS_EMBED_NOT_INSTALLED}" != "" ] ; then
 292     echo "Please install ExtUtils::Embed for $PERL_COMMAND"
 293     exit 1;
 294   fi
 295
 296   mv $mft $mftt
 297   echo "PERL_CC=`$PERL_COMMAND -MConfig -e 'print $Config{cc}'`" >>$mft
 298   echo "PERL_CCOPTS=`$PERL_COMMAND -MExtUtils::Embed -e ccopts`" >>$mft
 299   echo "PERL_LIBS=`$PERL_COMMAND -MExtUtils::Embed -e ldopts`" >>$mft
 300   echo "" >>$mft
 301   cat $mftt >> $mft
 302   rm -f $mftt
 303 fi
 304
 305 # Record the build variable in the Makefile.
 306
 307 echo "build=$build" >>$mft
 308 echo "" >>$mft
 309
 310 # Finally, join on the generic base make file, which contains the actual
 311 # rules and stuff.
 312
 313 echo "# From ../OS/Makefile-Base" >> $mft
 314 cat ../OS/Makefile-Base >> $mft || exit 1
 315
 316 # If the new makefile is the same as the existing one, say so, and just
 317 # update the timestamp. Otherwise remove the old and install the new.
 318
 319 if      [ -s $mf ] && cmp -s $mft $mf && [ -s $look_mf ] && cmp -s $look_mf_post $look_mf
 320 then    echo ">>> rebuilt $mf unchanged"
 321         echo " "
 322         touch $mf || exit
 323         rm -f $mft $look_mf_pre $look_mf_post
 324 elif    rm -f $mf $look_mf $look_mf_pre
 325         mv $mft $mf
 326         mv $look_mf_post $look_mf
 327 then    echo ">>> New $mf & $look_mf installed"
 328         echo '>>> Use "make makefile" if you need to force rebuilding of the makefile'
 329         echo " "
 330 else    echo " "
 331         echo "*** Failed to install $mf - see $mft"
 332         echo "    (or $look_mft)"
 333         echo " "
 334         exit 1;
 335 fi
 336
 337 # vim: set ft=sh :
 338 # End of Configure-Makefile