diff -ur libxslt-1.1.26.orig/libxslt.m4 libxslt-1.1.26/libxslt.m4
--- libxslt-1.1.26.orig/libxslt.m4	2009-05-12 09:29:34.000000000 +0300
+++ libxslt-1.1.26/libxslt.m4	2009-10-07 17:03:04.000000000 +0300
@@ -52,8 +52,10 @@
            sed 's/\([[0-9]]*\).\([[0-9]]*\).\([[0-9]]*\)/\3/'`
     if test "x$enable_xslttest" = "xyes" ; then
       ac_save_CFLAGS="$CFLAGS"
+      ac_save_CXXFLAGS="$CXXFLAGS"
       ac_save_LIBS="$LIBS"
       CFLAGS="$CFLAGS $XSLT_CFLAGS"
+      CXXFLAGS="$CXXFLAGS $XSLT_CFLAGS"
       LIBS="$XSLT_LIBS $LIBS"
 dnl
 dnl Now check if the installed libxslt is sufficiently new.
@@ -138,6 +140,7 @@
 }
 ],, no_xslt=yes,[echo $ac_n "cross compiling; assumed OK... $ac_c"])
        CFLAGS="$ac_save_CFLAGS"
+       CXXFLAGS="$ac_save_CXXFLAGS"
        LIBS="$ac_save_LIBS"
      fi
   fi
@@ -158,6 +161,7 @@
        else
           echo "*** Could not run libxslt test program, checking why..."
           CFLAGS="$CFLAGS $XSLT_CFLAGS"
+          CXXFLAGS="$CXXFLAGS $XSLT_CFLAGS"
           LIBS="$LIBS $XSLT_LIBS"
           AC_TRY_LINK([
 #include <libxslt/xslt.h>
@@ -177,6 +181,7 @@
           echo "*** or that you have moved LIBXSLT since it was installed. In the latter case, you"
           echo "*** may want to edit the xslt-config script: $XSLT_CONFIG" ])
           CFLAGS="$ac_save_CFLAGS"
+          CXXFLAGS="$ac_save_CXXFLAGS"
           LIBS="$ac_save_LIBS"
        fi
      fi