Wed Oct 22 00:34:12 1997 Jeffrey A Law (law@cygnus.com)
+ * toplev.c (flag_exceptions): Default value is 2.
+ (compile_file): If flag_exceptions still has the value 2, then
+ set it to 0.
+
* rs6000.c (struct machine_function): Add pic_offset_table_rtx.
(rs6000_save_machine_status): Save pic_offset_table_rtx.
(rs6000_restore_machine_status: Restore pic_offset_table_rtx.
+Wed Oct 22 18:56:31 1997 Jeffrey A Law (law@cygnus.com)
+
+ * lex.c (lang_init): Enable flag_exceptions by default if no
+ command line switch was specified.
+
Wed Sep 10 16:39:26 1997 Jim Wilson <wilson@cygnus.com>
* Make-lang.in (LN, LN_S): New macros, use where appropriate.
put_back (check_newline ());
if (flag_gnu_xref) GNU_xref_begin (input_filename);
init_repo (input_filename);
+
+ /* See comments in toplev.c before the call to lang_init. */
+ if (flag_exceptions == 2)
+ flag_exceptions = 1;
}
void
/* Nonzero means generate extra code for exception handling and enable
exception handling. */
-int flag_exceptions = 1;
+int flag_exceptions = 2;
/* Nonzero means don't place uninitialized global data in common storage
by default. */
input_file_stack->next = 0;
input_file_stack->name = input_filename;
+ /* Gross. Gross. lang_init is (I think) the first callback into
+ the language front end, and is thus the first opportunity to
+ have the selected language override the default value for any
+ -f option.
+
+ So the default value for flag_exceptions is 2 (uninitialized).
+ If we encounter -fno-exceptions or -fexceptions, then flag_exceptions
+ will be set to zero or one respectively.
+
+ flag_exceptions can also be set by lang_init to something other
+ than the default "uninitialized" value of 2.
+
+ After lang_init, if the value is still 2, then we default to
+ -fno-exceptions (value will be reset to zero).
+
+ When our EH mechanism is low enough overhead that we can enable
+ it by default for languages other than C++, then all this braindamage
+ will go away. */
+
/* Perform language-specific initialization.
This may set main_input_filename. */
lang_init ();
+ if (flag_exceptions == 2)
+ flag_exceptions = 0;
+
/* If the input doesn't start with a #line, use the input name
as the official input file name. */
if (main_input_filename == 0)