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                     [#include <apr.h>
                      MaTcHtHiS APR_INT64_T_FMT EnDeNd],
                     [svn_cv_pycfmt_apr_int64_t="i"])
      fi
    ])
    CPPFLAGS="$SVN_PYCFMT_SAVE_CPPFLAGS"
    if test "x$svn_cv_pycfmt_apr_int64_t" = "x"; then
      AC_MSG_ERROR([failed to recognize APR_INT64_T_FMT on this platform])
    fi
    AC_DEFINE_UNQUOTED([SVN_APR_INT64_T_PYCFMT],
                       ["$svn_cv_pycfmt_apr_int64_t"],
                       [Define to the Python/C API format character suitable]
                       [ for apr_int64_t])
  fi

  if test "$PERL" != "none"; then
    AC_MSG_CHECKING([perl version])
    dnl Note that the q() bit is there to avoid unbalanced brackets
    dnl which m4 really doesn't like.
    PERL_VERSION="`$PERL -e 'q([[); print $]] * 1000000,$/;'`"
    AC_MSG_RESULT([$PERL_VERSION])
    if test "$PERL_VERSION" -ge "5008000"; then
      SWIG_PL_INCLUDES="\$(SWIG_INCLUDES) `$PERL -MExtUtils::Embed -e ccopts`"
    else
      AC_MSG_WARN([perl bindings require perl 5.8.0 or newer.])
    fi
  fi

  SWIG_RB_COMPILE="none"
  SWIG_RB_LINK="none"
  if test "$RUBY" != "none"; then
    rbconfig="$RUBY -rrbconfig -e "

    for var_name in arch archdir CC LDSHARED DLEXT LIBS LIBRUBYARG \
                    rubyhdrdir sitedir sitelibdir sitearchdir libdir
    do
      rbconfig_tmp=`$rbconfig "print RbConfig::CONFIG@<:@'$var_name'@:>@"`
      eval "rbconfig_$var_name=\"$rbconfig_tmp\""
    done

    AC_MSG_NOTICE([Configuring Ruby SWIG binding])

    AC_CACHE_CHECK([for Ruby include path], [svn_cv_ruby_includes],[
    if test -d "$rbconfig_rubyhdrdir"; then
      dnl Ruby >=1.9
      svn_cv_ruby_includes="-I. -I$rbconfig_rubyhdrdir -I$rbconfig_rubyhdrdir/ruby -I$rbconfig_rubyhdrdir/ruby/backward -I$rbconfig_rubyhdrdir/$rbconfig_arch"
    else
      dnl Ruby 1.8
      svn_cv_ruby_includes="-I. -I$rbconfig_archdir"
    fi
    ])
    SWIG_RB_INCLUDES="\$(SWIG_INCLUDES) $svn_cv_ruby_includes"

    AC_CACHE_CHECK([how to compile Ruby extensions], [svn_cv_ruby_compile],[
      svn_cv_ruby_compile="$rbconfig_CC $CFLAGS"
    ])
    SWIG_RB_COMPILE="$svn_cv_ruby_compile"
    SVN_STRIP_FLAG([SWIG_RB_COMPILE], [-ansi])
    SVN_STRIP_FLAG([SWIG_RB_COMPILE], [-std=c89])
    SVN_STRIP_FLAG([SWIG_RB_COMPILE], [-std=c90])
    dnl FIXME: Check that the compiler for Ruby actually supports this flag
    SWIG_RB_COMPILE="$SWIG_RB_COMPILE -Wno-int-to-pointer-cast"

    AC_CACHE_CHECK([how to link Ruby extensions], [svn_cv_ruby_link],[
      svn_cv_ruby_link="`$RUBY -e 'ARGV.shift; print ARGV.join(%q( ))' \
                           $rbconfig_LDSHARED`"
      svn_cv_ruby_link="$rbconfig_CC $svn_cv_ruby_link"
      svn_cv_ruby_link="$svn_cv_ruby_link -shrext .$rbconfig_DLEXT"
    ])
    SWIG_RB_LINK="$svn_cv_ruby_link"

    AC_CACHE_CHECK([how to link Ruby libraries], [ac_cv_ruby_libs], [
      ac_cv_ruby_libs="$rbconfig_LIBRUBYARG $rbconfig_LIBS"
    ])
    SWIG_RB_LIBS="`SVN_REMOVE_STANDARD_LIB_DIRS($ac_cv_ruby_libs)`"

    AC_MSG_CHECKING([for rb_errinfo])
    old_CFLAGS="$CFLAGS"
    old_LIBS="$LIBS"
    CFLAGS="$CFLAGS $svn_cv_ruby_includes"
    SVN_STRIP_FLAG([CFLAGS], [-ansi])
    SVN_STRIP_FLAG([CFLAGS], [-std=c89])
    SVN_STRIP_FLAG([CFLAGS], [-std=c90])
    LIBS="$SWIG_RB_LIBS"
    AC_LINK_IFELSE([AC_LANG_SOURCE([[
#include <ruby.h>
int main()
{rb_errinfo();}]])], have_rb_errinfo="yes", have_rb_errinfo="no")
    if test "$have_rb_errinfo" = "yes"; then
      AC_MSG_RESULT([yes])
      AC_DEFINE([HAVE_RB_ERRINFO], [1],
                [Define to 1 if you have the `rb_errinfo' function.])
    else
      AC_MSG_RESULT([no])
    fi
    CFLAGS="$old_CFLAGS"
    LIBS="$old_LIBS"

    AC_CACHE_VAL([svn_cv_ruby_sitedir],[
      svn_cv_ruby_sitedir="$rbconfig_sitedir"
    ])
    AC_ARG_WITH([ruby-sitedir],
    AS_HELP_STRING([--with-ruby-sitedir=SITEDIR],
                               [install Ruby bindings in SITEDIR
                                (default is same as ruby's one)]),
    [svn_ruby_installdir="$withval"],
    [svn_ruby_installdir="$svn_cv_ruby_sitedir"])

    AC_MSG_CHECKING([where to install Ruby scripts])
    AC_CACHE_VAL([svn_cv_ruby_sitedir_libsuffix],[
      svn_cv_ruby_sitedir_libsuffix="`echo "$rbconfig_sitelibdir" | \
                                        $SED -e "s,^$rbconfig_sitedir,,"`"
    ])
    SWIG_RB_SITE_LIB_DIR="${svn_ruby_installdir}${svn_cv_ruby_sitedir_libsuffix}"
    AC_MSG_RESULT([$SWIG_RB_SITE_LIB_DIR])

    AC_MSG_CHECKING([where to install Ruby extensions])
    AC_CACHE_VAL([svn_cv_ruby_sitedir_archsuffix],[
      svn_cv_ruby_sitedir_archsuffix="`echo "$rbconfig_sitearchdir" | \
                                        $SED -e "s,^$rbconfig_sitedir,,"`"
    ])