configure.additional

# tar-ustar causes us to try and use a tar that can deal with long path names.
AM_INIT_AUTOMAKE(tar-ustar)

AM_PROG_LIBTOOL

AC_CONFIG_MACRO_DIR([m4])

# platform type. There's rules about how derived variables that
# are used in Makefiles are named. We are going to evaluate PLATFORM_TYPE
# into a derived variable name down the line, so we'll try to mash down
# any but the most vanilla characters into underscores... underscores
# are valid in derived variable names.
PLATFORM_TYPE=`uname -s``uname -r`
PLATFORM_TYPE=`echo [${PLATFORM_TYPE//[^[:alnum:]]/_}]`
AC_MSG_NOTICE([ platform type: $PLATFORM_TYPE ])
AC_SUBST(PLATFORM_TYPE)

# precedence of where we look for stuff we need:
#  - which(1) - if "which" finds something, use that.
#  - look in the usual places, use the first one we find.
#  - why don't you just tell me what movie you'd like to see?
#
USUAL_SUSPECTS=\
"/usr/bin/
/usr/sbin/
/usr/local/bin/
/usr/local/sbin/
/usr/local/apache2/bin/"

# locate whackyprog. whackyprog is some program we need if we are going
# to compile convenience library 3, similar to how you might need to
# find apxs if you were going to compile an apache module. The way
# the "locate whackyprog" block here works:
#   if whackyprog can be found, it gets used.
#   if whackyprog can't be found, configure errs with a suggestion
#      about how to tell configure where whackyprog is. In this example
#      it is possible to build some of the project without whackyprog.

AC_ARG_WITH([whackyprog],
  AS_HELP_STRING([--with-whackyprog=/FULL/PATH/whackyprog],
                 [path to whackyprog executable, or "ignore" to avoid building \
convenience library 3]))

MY_WHACKYPROG="no"

which whackyprog &> /dev/null

if test "$?" == "0" ; then
  MY_WHACKYPROG=`which whackyprog`
else
  for candidate in $USUAL_SUSPECTS
  do
    AS_IF([test -x $candidate"whackyprog"],
          [MY_WHACKYPROG=$candidate"whackyprog"])
  done
fi

if test "x$with_whackyprog" != "x" ; then
  MY_WHACKYPROG=$with_whackyprog
fi

if test "$MY_WHACKYPROG" = "no"; then
  AC_MSG_ERROR([*** Use --with-whackyprog=/full/path/to/whackyprog or \
--with-whackyprog=ignore to avoid building convenience library 3.])
else
  if test "$MY_WHACKYPROG" = "ignore"; then
    AC_MSG_NOTICE([ notice: NOT BUILDING CONVENIENCE LIBRARY 3 ])
    AM_CONDITIONAL(BUILD_CONVENIENCE_LIB_3, [test x"$MY_WHACKYPROG" = ignore])
  else
    AC_MSG_NOTICE([ using: $MY_WHACKYPROG ])
    AM_CONDITIONAL(BUILD_CONVENIENCE_LIB_3, [test x"$MY_WHACKYPROG" != ignore])
  fi
fi