* acgeneral.m4 (AC_OUTPUT): Change the root of filenames of
config.status from $conftest to $confstat.
The previous patch to make config.status reentrant was wrong,
because it changed some `conftest' that are used by configure into
`$conftest', while it was for config.status only. To avoid
another confusion like this, all the filenames of config.status
should be `$confstat*', and those of configure should be
`conftest*'.
(AC_OUTPUT): Rename the uses of `ac_file' for the sed fragments as
`ac_sed_frag'.
* acgeneral.m4 (AC_OUTPUT): This macro used to open the here
documents that configure uses to generate config.status, included
that of the submacros. Now, it no longer handles the here
documents for its subroutines (it was far to hard to track).
(AC_OUTPUT_FILES): Open and close your here documents to
$CONFIG_STATUS.
(AC_OUTPUT_HEADER): Likewise.
(AC_OUTPUT_LINKS): Likewise.
* acgeneral.m4 (AC_OUTPUT_FILES): Move $ac_vpsub and $extrasub
from the AC_SUBST substitutions (i.e., that of @SHELL@ etc.) to
the specific section (that of @srcdir@ etc.).
Now the ``general substitution'' section is absolutely uniform.
* acgeneral.m4 (AC_SUBST): Change sed call from `s%@from@%to%g'
into `s%@from@%to%;t t'.
(AC_SUBST_FILE): Likewise.
(AC_OUTPUT_FILES): Optimize the sed scripts by branching if there
are no `@' on the line. Impressive speed up.