[Xapian-tickets] [Xapian] #622: C++ ABI check fails with e.g. CXXFLAGS=-fabi-version=0

[Xapian]

#622: C++ ABI check fails with e.g. CXXFLAGS=-fabi-version=0
--------------------------+-------------------------------------------------
 Reporter:  mustrumr97    |       Owner:  olly    
     Type:  defect        |      Status:  assigned
 Priority:  normal        |   Milestone:  1.2.16  
Component:  Build system  |     Version:          
 Severity:  normal        |    Keywords:          
Blockedby:                |    Platform:  All     
 Blocking:                |  
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Changes (by olly):

  * milestone:  1.3.2 => 1.2.16


Comment:

 OK, committed a fix to trunk in r17303.

 I too the approach of adding both CPPFLAGS and CXXFLAGS only for MSVC and
 compilers defining __GNUC__ (since those may need the additional flags,
 and we know they should handle all CXXFLAGS); for others compilers, I only
 added CPPFLAGS.

 The autoconf manual advises in the docs for AC_PREPROC_IFELSE that:

 {{{
 This macro uses `CPPFLAGS', but not `CFLAGS', because `-g', `-O', etc. are
 not valid options to many C preprocessors.
 }}}

 It's unclear if that's also true for C++ compilers, but CXXCPP can be cpp
 if $CXX -E doesn't work, and I'd rather avoid possible regressions for
 compilers and platforms I'm unable to test on.

 Marking to backport for 1.2.16.

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Ticket URL: <http://trac.xapian.org/ticket/622#comment:3>
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