BIND 10 #3119: [kean] botan present but not usable

[BIND 10 Development]

#3119: [kean] botan present but not usable
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            Reporter:  wlodekwencel  |                        Owner:  kean
                Type:  defect        |                       Status:
            Priority:  medium        |  reviewing
           Component:  Unclassified  |                    Milestone:
            Keywords:  botan         |  Sprint-20131015
           Sensitive:  0             |                   Resolution:
         Sub-Project:  DNS           |                 CVSS Scoring:
Estimated Difficulty:  2             |              Defect Severity:  N/A
         Total Hours:  0             |  Feature Depending on Ticket:
                                     |          Add Hours to Ticket:  0
                                     |                    Internal?:  0
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Changes (by stephen):

 * owner:  stephen => kean


Comment:

 Reviewed commit 43c722563552989ee5f7adfe99b0ba75bb56bb87

 As I understand the change, configure.ac should print out an extended
 error message if botan/botan.h is found but, for some reason, fails to
 compile.

 With this configuration:

 * Ubuntu 12.04
 * autoreconf 2.68
 * g++ 4.6.3
 * Botan 1.8

 ... I ran the following tests:

 1. With everything installed normally, "configure" successfully located
 Botan.

 2. Removing botan/botan.h, "configure" reported:
 {{{
 checking for botan/botan.h... no
 configure: error: Missing required header files.
 }}}

 3. Modifying botan/botan.h so that it would not compile (I added a
 "#error" directive to the end of the file) gave the same message:
 {{{
 checking for botan/botan.h... no
 configure: error: Missing required header files.
 }}}

 So the proposed change does not appear to work (at least on this
 configuration).

 One other point.  The "configure.ac" code makes use of the symbol
 ac_header_preproc.  The documentation for "autoconf" is not perfect, but
 it does mention the AC_CHECK_HEADERS macro used to check for the presence
 of botan/botan.h.  I have not been able to find an explanation of the
 ac_headers_preproc symbol. A comment containing a description or pointer
 to the documentation would be appreciated.

-- 
Ticket URL: <http://bind10.isc.org/ticket/3119#comment:9>
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