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extensions: require AC_GNU_SOURCE only for <=2.63
authorPaul Eggert <eggert@cs.ucla.edu>
Sun, 27 Sep 2020 02:18:08 +0000 (19:18 -0700)
committerPaul Eggert <eggert@cs.ucla.edu>
Sun, 27 Sep 2020 02:18:48 +0000 (19:18 -0700)
commit6742a5d3394cd39f18006b89f6c8cd43078af0e1
tree4d3b6dbae30a2c0d11922ec49183683e2e0106d2
parentb3865ddc7796109b265147ad1faff2ddba7dc861
extensions: require AC_GNU_SOURCE only for <=2.63

Problem reported by Gavin Smith in:
https://lists.gnu.org/r/autoconf/2020-09/msg00012.html
* m4/extensions.m4 ([gl_USE_SYSTEM_EXTENSIONS]):
Require AC_GNU_SOURCE only for Autoconf 2.63 and earlier, since it
shouldn’t be needed after that, and Autoconf 2.70 complains about
it being obsolete.
ChangeLog
m4/extensions.m4