AC_SUBST_FILE regression in -cvs

[Peter Ekberg]

Hi!

(I'm not on the autoconf list, please CC me...)

In one of the ggi libraries we use AC_SUBST_FILE to insert
some extra symbols to be exported from a library. These
symbols are determined by configure.

The exported symbols are listed in EXPSYMS.in which basically
looks something like this:

------8<------
foo
address@hidden@
------8<------

configure then creates a file EXPSYMS.extra with this content
(depending on which extra symbols are needed):

------8<------
_extra_foo
_extra_bar
------8<------

and finally configure does this:

EXTRA_SYMBOLS=EXPSYMS.extra
AC_SUBST_FILE(EXTRA_SYMBOLS)
AC_CONFIG_FILES([EXPSYMS])

With autoconf 2.59 this yields this EXPSYMS file:

------8<------
foo
bar
_extra_foo
_extra_bar
------8<------

which is what is desired.

With autoconf-cvs the @EXTRA_SYMBOLS@ is no longer found
(it has to be alone on the line, or perhaps first on the
line?). Moving @EXTRA_SYMBOLS@ to a line of its own is not
a solution here since the EXPSYMS file should not have
any blank lines.

Should we stop (ab?)using AC_SUBST_FILE and just create
the EXPSYMS file we need w/o help from autoconf?

Cheers,
Peter