Make trivstring class ready for use

[features.git] / config / lyxinclude.m4

diff --git a/config/lyxinclude.m4 b/config/lyxinclude.m4
index 95cb1f09aad3db6084b73431928fb12d8a112588..01d57bc727dcff8208b3e3fd51269930125b7f42 100644 (file)
--- a/config/lyxinclude.m4
+++ b/config/lyxinclude.m4
@@ -297,6 +297,7 @@ if test x$GXX = xyes; then
              ;;
       esac
   fi
+  AC_DEFINE(STD_STRING_USES_COW, 1, [std::string uses copy-on-write])
 fi
 test "$lyx_pch_comp" = yes && lyx_flags="$lyx_flags pch"
 AM_CONDITIONAL(LYX_BUILD_PCH, test "$lyx_pch_comp" = yes)