* m4/gccwarn.m4: Add -Woverloaded-virtual.

c8785a28 · Alexandre Duret-Lutz · 54935cb9 · c8785a28
Commit c8785a28 authored Oct 02, 2015 by Alexandre Duret-Lutz
--- a/m4/gccwarn.m4
+++ b/m4/gccwarn.m4
@@ -34,7 +34,8 @@ EOF
   Wcast-qual \
   Wdocumentation \
   Wmissing-declarations \
-   Wnoexcept
+   Wnoexcept \
+   Woverloaded-virtual
  do
    CXXFLAGS="$cf_save_CXXFLAGS $ac_cv_prog_gxx_warn_flags -$cf_opt"
    if AC_TRY_EVAL(ac_compile); then