which shell is running configure?

[Sam Steingold]

I encountered the following problem:
an autoconf test that checks whether `test' supports `-nt' passes,
but when make tries to use "test -nt" in Makefile, it fails.
this appeared to suggest that configure and make were using different
shells, and, indeed, I found some code in configure which appears to
re-run it with bash:

  case $CONFIG_SHELL in
  '')
    as_save_IFS=$IFS; IFS=$PATH_SEPARATOR
for as_dir in /bin$PATH_SEPARATOR/usr/bin$PATH_SEPARATOR$PATH
do
  IFS=$as_save_IFS
  test -z "$as_dir" && as_dir=.
  for as_base in sh bash ksh sh5; do
         case $as_dir in
         /*)
           if ("$as_dir/$as_base" -c '
  as_lineno_1=$LINENO
  as_lineno_2=$LINENO
  as_lineno_3=`(expr $as_lineno_1 + 1) 2>/dev/null`
  test "x$as_lineno_1" != "x$as_lineno_2" &&
  test "x$as_lineno_3"  = "x$as_lineno_2" ') 2>/dev/null; then
             $as_unset BASH_ENV || test "${BASH_ENV+set}" != set || { 
BASH_ENV=; export BASH_ENV; }
             $as_unset ENV || test "${ENV+set}" != set || { ENV=; export ENV; }
             CONFIG_SHELL=$as_dir/$as_base
             export CONFIG_SHELL
             exec "$CONFIG_SHELL" "$0" ${1+"$@"}
           fi;;
         esac
       done
done
;;
  esac


why is this being done?

I now set CONFIG_SHELL to /bin/sh before configure and it appears to work.


-- 
Sam Steingold (http://www.podval.org/~sds) on Fedora Core release 5 (Bordeaux)
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