[Xapian-tickets] [Xapian] #834: *BSD conditional to modify xapian-bindings/config.ac to suppress -lstdc++ library

[Xapian]

#834: *BSD conditional to modify xapian-bindings/config.ac to suppress -lstdc++
library
---------------------------------+-------------------------------
        Reporter:  David Gessel  |      Owner:  Olly Betts
            Type:  defect        |     Status:  new
        Priority:  normal        |  Milestone:
       Component:  Other         |    Version:
        Severity:  normal        |   Keywords:  -lstdc++, FreeBSD
      Blocked By:                |   Blocking:
Operating System:  FreeBSD       |
---------------------------------+-------------------------------
 This is similar to #430, opened and marked invalid many years ago, and
 likewise the issue is, for me, arising from attempting to build a ruby gem
 xapian-ruby-1.4.22 on FreeBSD.  The problematic code seems to be in
 xapian-bindings-1.4.22/configure.ac which generates a /configure file that
 includes at 21047
 {{{
 SWIG_CXXFLAGS=
 if test yes = "$GXX" ; then
                     SWIG_CXXFLAGS="-fno-strict-aliasing"

               XAPIAN_LIBS="$XAPIAN_LIBS -lstdc++"


 cat confdefs.h - <<_ACEOF >conftest.$ac_ext
 }}}

 The [https://github.com/freebsd/freebsd-ports/blob/main/databases/ruby-
 xapian/files/patch-configure FreeBSD port] for this gem, patches the same
 configure file as

 {{{
 --- configure.orig      2023-02-02 01:01:44 UTC
 +++ configure
 @@ -21048,7 +21048,7 @@ SWIG_CXXFLAGS=
  if test yes = "$GXX" ; then
                      SWIG_CXXFLAGS="-fno-strict-aliasing"

 -              XAPIAN_LIBS="$XAPIAN_LIBS -lstdc++"
 +              XAPIAN_LIBS="$XAPIAN_LIBS"


  cat confdefs.h - <<_ACEOF >conftest.$ac_ext
 }}}

 While this is easily patched manually after a build failure to get a
 successful build on FreeBSD, might it be possible to detect the build
 environment and modify the construction of the configure file from
 config.ac in a manner similar to
 [https://github.com/byfron/aitd/blob/0ca689532e46ed6b2d66e5da1cdd38ce174e718e/configure.ac#L71
 the aitd project has]?

 {{{
 AC_MSG_CHECKING(system)
 case "$host_os" in
 ...
     mingw32* )
         LIBS="$XAPIAN_LIBS -lstdc++"
         ;;
 ...
     openbsd* )
 ...
         LIBS="$XAPIAN_LIBS"
         ;;
 }}}

 Adjusted as appropriate to include a FreeBSD detection.
-- 
Ticket URL: <https://trac.xapian.org/ticket/834>
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