Re: Eager mind wants to understand

[Bob Friesenhahn]

On Sun, 26 Sep 2004, Bob Friesenhahn wrote:
> + eval objext=NONE objext=NONE
> + eval /usr/local/bin/grep "^objext=" + /usr/local/bin/grep ^objext= + eval 
> ../libtool --config + ../libtool --config : : cannot open
> + eval + eval test x"$objext" = xNONE + test xNONE = xNONE + func_error 
> objext not set in `../libtool --config' + echo link.test: objext not set in 
> `../libtool --config' link.test: objext not set in `../libtool --config'
> + : my_exitp=:
> + : + exit 1 FAIL: link.test

After drilling down a bit more, I see that the generated libtool fails 
to run:

+ unset CDPATH
+ test X--config = X--no-reexec
+ test X--config = X--fallback-echo
+ 2> /dev/null
+ test X         = X\t
+ exec /bin/sh  --no-reexec --config
: : cannot open

which has to do with the following code in the generated libtool:

  6665  # This environment variable determines our operation mode.
  6666  if test \"\$libtool_install_magic\" = \"$magic\"; then
  6667    # install mode needs the following variable:
  6668    notinst_deplibs='$notinst_deplibs'
  6669  else
  6670    # When we are sourced in execute mode, \$file and \$ECHO are already 
set.
  6671    if test \"\$libtool_execute_magic\" != \"$magic\"; then
  6672      ECHO=\"$qecho\"
  6673      file=\"\$0\"
  6674      # Make sure echo works.
  6675      if test \"X\$1\" = X--no-reexec; then
  6676        # Discard the --no-reexec flag, and continue.
  6677        shift
  6678      elif test \"X\`(\$ECHO '\t') 2>/dev/null\`\" = 'X\t'; then
  6679        # Yippee, \$ECHO works!
  6680        :
  6681      else
  6682        # Restart under the correct shell, and then maybe \$ECHO will 
work.
  6683        exec $SHELL \"\$0\" --no-reexec \${1+\"address@hidden"}
  6684      fi
  6685    fi\

So apparently \"\$0\" expands to nada.

Bob
======================================
Bob Friesenhahn
address@hidden
http://www.simplesystems.org/users/bfriesen