common/autoconf/flags.m4

*** 229,239 ****
      SET_SHARED_LIBRARY_MAPFILE=''
    fi
  
    AC_SUBST(C_FLAG_REORDER)
    AC_SUBST(CXX_FLAG_REORDER)
-   AC_SUBST(SHARED_LIBRARY_FLAGS)
    AC_SUBST(SET_EXECUTABLE_ORIGIN)
    AC_SUBST(SET_SHARED_LIBRARY_ORIGIN)
    AC_SUBST(SET_SHARED_LIBRARY_NAME)
    AC_SUBST(SET_SHARED_LIBRARY_MAPFILE)
  
--- 229,238 ----
*** 898,907 ****
--- 897,924 ----
    FLAGS_COMPILER_CHECK_ARGUMENTS([${COMPILER_TARGET_BITS_FLAG}${OPENJDK_TARGET_CPU_BITS}],
        [COMPILER_SUPPORTS_TARGET_BITS_FLAG=true],
        [COMPILER_SUPPORTS_TARGET_BITS_FLAG=false])
    AC_SUBST(COMPILER_SUPPORTS_TARGET_BITS_FLAG)
  
+   AC_ARG_ENABLE([warnings-as-errors], [AS_HELP_STRING([--disable-warnings-as-errors],
+       [do not consider native warnings to be an error @<:@enabled@:>@])])
+ 
+   AC_MSG_CHECKING([if native warnings are errors])
+   if test "x$enable_warnings_as_errors" = "xyes"; then
+     AC_MSG_RESULT([yes (explicitely set)])
+     WARNINGS_AS_ERRORS=true
+   elif test "x$enable_warnings_as_errors" = "xno"; then
+     AC_MSG_RESULT([no])
+     WARNINGS_AS_ERRORS=false
+   elif test "x$enable_warnings_as_errors" = "x"; then
+     AC_MSG_RESULT([yes (default)])
+     WARNINGS_AS_ERRORS=true
+   else
+     AC_MSG_ERROR([--enable-warnings-as-errors accepts no argument])
+   fi
+   AC_SUBST(WARNINGS_AS_ERRORS)
+ 
    case "${TOOLCHAIN_TYPE}" in
      microsoft)
        DISABLE_WARNING_PREFIX="-wd"
        CFLAGS_WARNINGS_ARE_ERRORS="-WX"
        ;;