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Don’t issue obsoletion warnings for AC_LANG_SAVE/RESTORE (#110375)

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The most recently released version of libtool.m4 is five years old as
of this commit, and no new release is likely to appear anytime soon.
It uses AC_LANG_SAVE and AC_LANG_RESTORE, in a way that doesn’t
obviously translate to AC_LANG_PUSH and AC_LANG_POP.  This will need
to be fixed by libtool upstream.  Until that actually happens, disable
the -Wobsolete warnings for AC_LANG_SAVE and AC_LANG_RESTORE.  (They
are still documented as obsolete in the manual, as they have been for
many years.)

Fixes bug #110375.

* lib/autoconf/lang.m4 (AC_LANG_SAVE, AC_LANG_RESTORE): Define with
  AC_DEFUN, not AU_DEFUN; remove manual -Wobsolete warnings.
This commit is contained in:
Zack Weinberg 2020-11-15 14:27:38 -05:00
parent fd633e92cb
commit 15acc26a20
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1 changed files with 13 additions and 8 deletions
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21
lib/autoconf/lang.m4
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@ -119,20 +119,25 @@ m4_popdef([$0 OLD])dnl
# AC_LANG_SAVE
# ------------
# Save the current language, but don't change language.
AU_DEFUN([AC_LANG_SAVE],
[[AC_LANG_SAVE]],
[Instead of using `AC_LANG', `AC_LANG_SAVE', and `AC_LANG_RESTORE',
you should use `AC_LANG_PUSH' and `AC_LANG_POP'.])
# XXX 2020-11-15: This macro is obsolete, but we do not define it with
# AU_DEFUN because autoupdate can't fix it, and we don't issue an
# obsoletion warning yet either, because it is used in the most
# recently released version of libtool.m4, which is not fair to expect
# packagers to tinker with. Revisit after libtool makes a release
# with their code updated.
AC_DEFUN([AC_LANG_SAVE],
[m4_pushdef([_AC_LANG], _AC_LANG)dnl
m4_warn([obsolete], [The macro `AC_LANG_SAVE' is obsolete.
You should run autoupdate.])])
[m4_pushdef([_AC_LANG], _AC_LANG)])
# AC_LANG_RESTORE
# ---------------
# Restore the current language from the stack.
AU_DEFUN([AC_LANG_RESTORE], [AC_LANG_POP($@)])
# XXX 2020-11-15: This macro is obsolete, but we do not define it with
# AU_DEFUN because autoupdate can't fix it properly, and we don't issue
# an obsoletion warning because it, like AC_LANG_SAVE, is used by the
# most recently released version of libtool.m4.
AC_DEFUN([AC_LANG_RESTORE],
[AC_LANG_POP($@)])
# _AC_LANG_ABBREV