Autoconf Macro: ax_enable

If the current configure was run within the srcdir then we move all configure-files into a subdir and let the configure steps continue there. We provide an option --disable-builddir to suppress the move into a separate builddir.

Defaults:

  $1 = $host (overridden with $HOST)
  $2 = Makefile.mk
  $3 = -all

This macro must be called before AM_INIT_AUTOMAKE. It creates a default toplevel srcdir Makefile from the information found in the created toplevel builddir Makefile. It just copies the variables and rule-targets, each extended with a default rule-execution that recurses into the build directory of the current "HOST". You can override the auto-dection through `config.guess` and build-time of course, as in

  make HOST=i386-mingw-cross

which can of course set at configure time as well using

  configure --host=i386-mingw-cross

After the default has been created, additional rules can be appended that will not just recurse into the subdirectories and only ever exist in the srcdir toplevel makefile - these parts are read from the $2 = Makefile.mk file

The automatic rules are usually scanning the toplevel Makefile for lines like '#### $host |$builddir' to recognize the place where to recurse into. Usually, the last one is the only one used. However, almost all targets have an additional "*-all" rule which makes the script to recurse into _all_ variants of the current HOST (!!) setting. The "-all" suffix can be overriden for the macro as well.

a special rule is only given for things like "dist" that will copy the tarball from the builddir to the sourcedir (or $(PUB)) for reason of convenience.

Author

Last Modified

M4 Source Code

AC_DEFUN([AX_ENABLE_BUILDDIR],[
AC_REQUIRE([AC_CANONICAL_HOST])[]dnl
AC_REQUIRE([AX_CONFIGURE_ARGS])[]dnl
AC_BEFORE([$0],[AM_INIT_AUTOMAKE])dnl
AS_VAR_PUSHDEF([SUB],[ax_enable_builddir])dnl
AS_VAR_PUSHDEF([AUX],[ax_enable_builddir_auxdir])dnl
AS_VAR_PUSHDEF([SED],[ax_enable_builddir_sed])dnl
SUB="."
AC_ARG_ENABLE([builddir], AC_HELP_STRING(
  [--disable-builddir],[disable automatic build in subdir of sources])
  ,[SUB="$enableval"], [SUB="yes"])
if test ".$ac_srcdir_defaulted" != ".no" ; then
if test ".$srcdir" = ".." ; then
  if test -f config.status ; then
    AC_MSG_NOTICE(toplevel srcdir already configured... skipping subdir build)
  else
    test ".$SUB" = "."  && SUB="."
    test ".$SUB" = ".no"  && SUB="."
    test ".$TARGET" = "." && TARGET="$target"
    test ".$SUB" = ".yes" && SUB="m4_ifval([$1], [$1],[$TARGET])"
    if test ".$SUB" != ".." ; then    # we know where to go and
      AS_MKDIR_P([$SUB])
      echo __.$SUB.__ > $SUB/conftest.tmp
      cd $SUB
      if grep __.$SUB.__ conftest.tmp >/dev/null 2>/dev/null ; then
        rm conftest.tmp
        AC_MSG_RESULT([continue configure in default builddir "./$SUB"])
      else
        AC_MSG_ERROR([could not change to default builddir "./$SUB"])
      fi
      srcdir=`echo "$SUB" |
              sed -e 's,^\./,,;s,[[^/]]$,&/,;s,[[^/]]*/,../,g;s,[[/]]$,,;'`
      # going to restart from subdirectory location
      test -f $srcdir/config.log   && mv $srcdir/config.log   .
      test -f $srcdir/confdefs.h   && mv $srcdir/confdefs.h   .
      test -f $srcdir/conftest.log && mv $srcdir/conftest.log .
      test -f $srcdir/$cache_file  && mv $srcdir/$cache_file  .
      AC_MSG_RESULT(....exec $SHELL $srcdir/[$]0 "--srcdir=$srcdir" "--enable-builddir=$SUB" ${1+"[$]@"})
      case "[$]0" in # restart
       [/\\]*) eval $SHELL "'[$]0'" "'--srcdir=$srcdir'" "'--enable-builddir=$SUB'" $ac_configure_args ;;
       *) eval $SHELL "'$srcdir/[$]0'" "'--srcdir=$srcdir'" "'--enable-builddir=$SUB'" $ac_configure_args ;;
      esac ; exit $?
    fi
  fi
fi fi
dnl ac_path_prog uses "set dummy" to override $@ which would defeat the "exec"
AC_PATH_PROG(SED,gsed sed, sed)
AUX="$ac_aux_dir"
AUX=`echo "$AUX" | $SED -e "s|$ac_top_srcdir|.|"`
test ".$AUX" = "." && AUX="$ac_aux_dir"
test ".$AUX" = "." && AUX="."
AS_VAR_POPDEF([SED])dnl
AS_VAR_POPDEF([AUX])dnl
AS_VAR_POPDEF([SUB])dnl
AC_CONFIG_COMMANDS([buildir],[dnl .............. config.status ..............
AS_VAR_PUSHDEF([SUB],[ax_enable_builddir])dnl
AS_VAR_PUSHDEF([TOP],[top_srcdir])dnl
AS_VAR_PUSHDEF([SRC],[ac_top_srcdir])dnl
AS_VAR_PUSHDEF([AUX],[ax_enable_builddir_auxdir])dnl
AS_VAR_PUSHDEF([SED],[ax_enable_builddir_sed])dnl
pushdef([END],[Makefile.mk])dnl
pushdef([_ALL],[ifelse([$3],,[-all],[$3])])dnl
  SRC="$ax_enable_builddir_srcdir"
  if test ".$SUB" = "." ; then
    if test -f "$TOP/Makefile" ; then
      AC_MSG_NOTICE([skipping TOP/Makefile - left untouched])
    else
      AC_MSG_NOTICE([skipping TOP/Makefile - not created])
    fi
  else
    if test -f "$SRC/Makefile" ; then
      a=`grep "^VERSION " "$SRC/Makefile"` ; b=`grep "^VERSION " Makefile`
      test "$a" != "$b" && rm "$SRC/Makefile"
    fi
    if test -f "$SRC/Makefile" ; then
        echo "$SRC/Makefile : $SRC/Makefile.in" > $tmp/conftemp.mk
        echo "     []@ echo 'REMOVED,,,' >\$[]@" >> $tmp/conftemp.mk
      eval "${MAKE-make} -f $tmp/conftemp.mk 2>/dev/null >/dev/null"
      if grep '^REMOVED,,,' "$SRC/Makefile" >/dev/null
      then rm $SRC/Makefile ; fi
      cp $tmp/conftemp.mk $SRC/makefiles.mk~      ## DEBUGGING
    fi
    if test ! -f "$SRC/Makefile" ; then
      AC_MSG_NOTICE([create TOP/Makefile guessed from local Makefile])
      x='`' ; cat >$tmp/conftemp.sed <<_EOF
/^\$/n
x
/^\$/bS
x
/\\\\\$/{H;d;}
{H;s/.*//;x;}
bM
:S
x
/\\\\\$/{h;d;}
{h;s/.*//;x;}
:M
s/\\(\\n\\)     /\\1 /g
/^      /d
/^[[    ]]*[[\\#]]/d
/^VPATH *=/d
s/^srcdir *=.*/srcdir = ./
s/^top_srcdir *=.*/top_srcdir = ./
/[[:=]]/!d
/^\\./d
s/:.*/:/
/:\$/s/ /  /g
/:\$/s/ \\([[a-z]][[a-z-]]*[[a-z]]\\) / \\1 \\1[]_ALL /g
/:\$/s/^\\([[a-z]][[a-z-]]*[[a-z]]\\)\\([[ :]]\\)/\\1 \\1[]_ALL\\2/
/:\$/s/  / /g
/^all all[]_ALL[[ :]]/i\\
all-configured : all[]_ALL
dnl dist-all exists... and would make for dist-all-all
/[]_ALL[]_ALL/d
/^.*[[=]]/!a\\
        @ HOST="\$(HOST)\" \\\\\\
        ; test ".\$\$HOST" = "." && HOST=$x sh $AUX/config.guess $x \\\\\\
        ; BUILD=$x grep "^#### \$\$HOST " Makefile | sed -e 's/.*|//' $x \\\\\\
        ; use=$x basename "\$\@" _ALL $x; n=$x echo \$\$BUILD | wc -w $x \\\\\\
        ; echo "MAKE \$\$HOST : \$\$n * \$\@"; if test "\$\$n" = "0" ; then : \\\\\\
        ; BUILD=$x grep "^####.*|" Makefile |tail -1| sed -e 's/.*|//' $x ; fi \\\\\\
        ; test ".\$\$BUILD" = "." && BUILD="." \\\\\\
        ; test "\$\$use" = "\$\@" && BUILD=$x echo "\$\$BUILD" | tail -1 $x \\\\\\
        ; for i in \$\$BUILD ; do test ".\$\$i" = "." && continue \\\\\\
        ; (cd "\$\$i" && test ! -f configure && \$(MAKE) \$\$use) || exit; done
dnl special rule add-on: "dist" copies the tarball to $(PUB). (source tree)
/dist[]_ALL *:/a\\
        @ HOST="\$(HOST)\" \\\\\\
        ; test ".\$\$HOST" = "." && HOST=$x sh $AUX/config.guess $x \\\\\\
        ; BUILD=$x grep "^#### \$\$HOST " Makefile | sed -e 's/.*|//' $x \\\\\\
        ; found=$x echo \$\$BUILD | wc -w $x \\\\\\
        ; echo "MAKE \$\$HOST : \$\$found \$(PACKAGE)-\$(VERSION).tar.*" \\\\\\
        ; if test "\$\$found" = "0" ; then : \\\\\\
        ; BUILD=$x grep "^#### .*|" Makefile |tail -1| sed -e 's/.*|//' $x \\\\\\
        ; fi ; for i in \$\$BUILD ; do test ".\$\$i" = "." && continue \\\\\\
        ; for f in \$\$i/\$(PACKAGE)-\$(VERSION).tar.* \\\\\\
        ; do test -f "\$\$f" && mv "\$\$f" \$(PUB). ; done ; break ; done
dnl special rule add-on: "distclean" removes all local builddirs completely
/distclean[]_ALL *:/a\\
        @ HOST="\$(HOST)\" \\\\\\
        ; test ".\$\$HOST" = "." && HOST=$x sh $AUX/config.guess $x \\\\\\
        ; BUILD=$x grep "^#### .*| *\\./" Makefile | sed -e 's/.*|//' $x \\\\\\
        ; use=$x basename "\$\@" _ALL $x; n=$x echo \$\$BUILD | wc -w $x \\\\\\
        ; echo "MAKE \$\$HOST : \$\$n * \$\@ (all local builds)" \\\\\\
        ; test ".\$\$BUILD" = "." && BUILD="." \\\\\\
        ; for i in \$\$BUILD ; do test ".\$\$i" = "." && continue \\\\\\
        ; echo "# rm -r \$\$i"; done ; echo "# (sleep 3)" ; sleep 3 \\\\\\
        ; for i in \$\$BUILD ; do test ".\$\$i" = "." && continue \\\\\\
        ; echo "rm -r \$\$i"; (rm -r "\$\$i") ; done ; rm Makefile
_EOF
      cp "$tmp/conftemp.sed" "$SRC/makefile.sed~"            ## DEBUGGING
      $SED -f $tmp/conftemp.sed Makefile >$SRC/Makefile
      if test -f "$SRC/m4_ifval([$2],[$2],[END])" ; then
        AC_MSG_NOTICE([extend TOP/Makefile with TOP/m4_ifval([$2],[$2],[END])])
        cat $SRC/END >>$SRC/Makefile
      fi ; xxxx="####"
      echo "$xxxx CONFIGURATIONS FOR TOPLEVEL MAKEFILE: " >>$SRC/Makefile
      # sanity check
      if grep '^; echo "MAKE ' $SRC/Makefile >/dev/null ; then
        AC_MSG_NOTICE([buggy sed found - it deletes tab in "a" text parts])
        $SED -e '/^@ HOST=/s/^/ /' -e '/^; /s/^/        /' $SRC/Makefile \
          >$SRC/Makefile~
        (test -s $SRC/Makefile~ && mv $SRC/Makefile~ $SRC/Makefile) 2>/dev/null
      fi
    else
      xxxx="\\#\\#\\#\\#"
      # echo "/^$xxxx *$ax_enable_builddir_host /d" >$tmp/conftemp.sed
      echo "s!^$xxxx [[^|]]* | *$SUB *\$!$xxxx ...... $SUB!" >$tmp/conftemp.sed
      $SED -f "$tmp/conftemp.sed" "$SRC/Makefile" >$tmp/mkfile.tmp
        cp "$tmp/conftemp.sed" "$SRC/makefiles.sed~"         ## DEBUGGING
        cp "$tmp/mkfile.tmp"   "$SRC/makefiles.out~"         ## DEBUGGING
      if cmp -s "$SRC/Makefile" "$tmp/mkfile.tmp" 2>/dev/null ; then
        AC_MSG_NOTICE([keeping TOP/Makefile from earlier configure])
        rm "$tmp/mkfile.tmp"
      else
        AC_MSG_NOTICE([reusing TOP/Makefile from earlier configure])
        mv "$tmp/mkfile.tmp" "$SRC/Makefile"
      fi
    fi
    AC_MSG_NOTICE([build in $SUB (HOST=$ax_enable_builddir_host)])
    xxxx="####"
    echo "$xxxx" "$ax_enable_builddir_host" "|$SUB" >>$SRC/Makefile
  fi
popdef([END])dnl
AS_VAR_POPDEF([SED])dnl
AS_VAR_POPDEF([AUX])dnl
AS_VAR_POPDEF([SRC])dnl
AS_VAR_POPDEF([TOP])dnl
AS_VAR_POPDEF([SUB])dnl
],[dnl
ax_enable_builddir_srcdir="$srcdir"                    # $srcdir
ax_enable_builddir_host="$HOST"                        # $HOST / $host
ax_enable_builddir_version="$VERSION"                  # $VERSION
ax_enable_builddir_package="$PACKAGE"                  # $PACKAGE
ax_enable_builddir_auxdir="$ax_enable_builddir_auxdir" # $AUX
ax_enable_builddir_sed="$ax_enable_builddir_sed"       # $SED
ax_enable_builddir="$ax_enable_builddir"               # $SUB
])dnl
])

License

This program is free software; you can redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free Software Foundation; either version 2 of the License, or (at your option) any later version.

This program is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for more details.

You should have received a copy of the GNU General Public License along with this program; if not, write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.

As a special exception, the respective Autoconf Macro's copyright owner gives unlimited permission to copy, distribute and modify the configure scripts that are the output of Autoconf when processing the Macro. You need not follow the terms of the GNU General Public License when using or distributing such scripts, even though portions of the text of the Macro appear in them. The GNU General Public License (GPL) does govern all other use of the material that constitutes the Autoconf Macro.

This special exception to the GPL applies to versions of the Autoconf Macro released by the Autoconf Macro Archive. When you make and distribute a modified version of the Autoconf Macro, you may extend this special exception to the GPL to apply to your modified version as well.

ax_enable_builddir

Synopsis

Description

Author

Last Modified

M4 Source Code

License