[asterisk-bugs] [JIRA] (ASTERISK-27585) [patch] BuildSystem: Resolve resolv.h not via Generic but Particular Header-Check.

[Alexander Traud (JIRA)]

Alexander Traud created ASTERISK-27585:
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             Summary: [patch] BuildSystem: Resolve resolv.h not via Generic but Particular Header-Check.
                 Key: ASTERISK-27585
                 URL: https://issues.asterisk.org/jira/browse/ASTERISK-27585
             Project: Asterisk
          Issue Type: Bug
      Security Level: None
          Components: Core/BuildSystem
    Affects Versions: 15.2.0
         Environment: OpenBSD 6.2
            Reporter: Alexander Traud
            Severity: Blocker


[Gerrit 5375|http://gerrit.asterisk.org/5375] changed the script ./configure how to look for required headers. In that change, the generic AC_CHECK_HEADERS is used. Currently, ./configure checks each header in that list individually, and tries to compile it via a small app. If a header is incomplete, the test fails. Therefore, the whole ./configure fails. However in that list of headers, {{resolv.h}} needs prerequisites—another header—because it is incomplete.

Currently OpenBSD (tested latest; 6.2) is affected by this. Tested myself and confirmed by <https://stackoverflow.com/q/35359456>. I reported that issue to OpenBSD.

For Asterisk, the workaround is to go for [particular header checks|http://www.gnu.org/software/autoconf/manual/autoconf.html#Particular-Headers] which leverage the long-term knowledge of the GNU autoconf team.

Because Gerrit 5375 has no issue report attached, I have to invite [~coreyfarrell] manually.



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