[tor-bugs] #2430 [- Select a component]: ./autogen.sh fails with autoconf < 2.61

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#2430: ./autogen.sh fails with autoconf < 2.61
----------------------------------+-----------------------------------------
 Reporter:  Sebastian             |       Owner:     
     Type:  defect                |      Status:  new
 Priority:  normal                |   Milestone:     
Component:  - Select a component  |     Version:     
 Keywords:                        |      Parent:     
----------------------------------+-----------------------------------------
 The AC_C_FLEXIBLE_ARRAY_MEMBER macro was introduced in 2.61, and if you
 use an older version (2.59 in this case) it fails:

 {{{
 autoheader: warning: missing template: FLEXIBLE_ARRAY_MEMBER
 autoheader: Use AC_DEFINE([FLEXIBLE_ARRAY_MEMBER], [], [Description])
 autoreconf: /usr/bin/autoheader failed with exit status: 1
 }}}

 Maybe we can provide a better warning here, to make sure that people
 realize they need to upgrade their autoheader?

 Reported by xiando on #tor.

-- 
Ticket URL: <https://trac.torproject.org/projects/tor/ticket/2430>
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