+++ /dev/null
-
- This patch brings over a few features from MirBSD:
- * -fhonour-copts
- If this option is not given, it's warned (depending
- on environment variables). This is to catch errors
- of misbuilt packages which override CFLAGS themselves.
- * Make -fno-strict-aliasing and -fno-delete-null-pointer-checks
- the default for -O2/-Os, because they trigger gcc bugs
- and can delete code with security implications.
-
- This patch was authored by Thorsten Glaser <tg at mirbsd.de>
- with copyright assignment to the FSF in effect.
-
---- a/gcc/c-opts.c
-+++ b/gcc/c-opts.c
-@@ -106,6 +106,9 @@
- /* Number of deferred options scanned for -include. */
- static size_t include_cursor;
-
-+/* Check if a port honours COPTS. */
-+static int honour_copts = 0;
-+
- static void set_Wimplicit (int);
- static void handle_OPT_d (const char *);
- static void set_std_cxx98 (int);
-@@ -689,6 +692,12 @@
- flag_exceptions = value;
- break;
-
-+ case OPT_fhonour_copts:
-+ if (c_language == clk_c) {
-+ honour_copts++;
-+ }
-+ break;
-+
- case OPT_fimplement_inlines:
- flag_implement_inlines = value;
- break;
-@@ -1198,6 +1207,47 @@
- return false;
- }
-
-+ if (c_language == clk_c) {
-+ char *ev = getenv ("GCC_HONOUR_COPTS");
-+ int evv;
-+ if (ev == NULL)
-+ evv = -1;
-+ else if ((*ev == '0') || (*ev == '\0'))
-+ evv = 0;
-+ else if (*ev == '1')
-+ evv = 1;
-+ else if (*ev == '2')
-+ evv = 2;
-+ else if (*ev == 's')
-+ evv = -1;
-+ else {
-+ warning (0, "unknown GCC_HONOUR_COPTS value, assuming 1");
-+ evv = 1; /* maybe depend this on something like MIRBSD_NATIVE? */
-+ }
-+ if (evv == 1) {
-+ if (honour_copts == 0) {
-+ error ("someone does not honour COPTS at all in lenient mode");
-+ return false;
-+ } else if (honour_copts != 1) {
-+ warning (0, "someone does not honour COPTS correctly, passed %d times",
-+ honour_copts);
-+ }
-+ } else if (evv == 2) {
-+ if (honour_copts == 0) {
-+ error ("someone does not honour COPTS at all in strict mode");
-+ return false;
-+ } else if (honour_copts != 1) {
-+ error ("someone does not honour COPTS correctly, passed %d times",
-+ honour_copts);
-+ return false;
-+ }
-+ } else if (evv == 0) {
-+ if (honour_copts != 1)
-+ inform (0, "someone does not honour COPTS correctly, passed %d times",
-+ honour_copts);
-+ }
-+ }
-+
- return true;
- }
-
---- a/gcc/c.opt
-+++ b/gcc/c.opt
-@@ -609,6 +609,9 @@
- fhonor-std
- C++ ObjC++
-
-+fhonour-copts
-+C ObjC C++ ObjC++ RejectNegative
-+
- fhosted
- C ObjC
- Assume normal C execution environment
---- a/gcc/common.opt
-+++ b/gcc/common.opt
-@@ -587,6 +587,9 @@
- Common Report Var(flag_guess_branch_prob) Optimization
- Enable guessing of branch probabilities
-
-+fhonour-copts
-+Common RejectNegative
-+
- ; Nonzero means ignore `#ident' directives. 0 means handle them.
- ; Generate position-independent code for executables if possible
- ; On SVR4 targets, it also controls whether or not to emit a
---- a/gcc/opts.c
-+++ b/gcc/opts.c
-@@ -896,9 +896,6 @@
- flag_schedule_insns_after_reload = opt2;
- #endif
- flag_regmove = opt2;
-- flag_strict_aliasing = opt2;
-- flag_strict_overflow = opt2;
-- flag_delete_null_pointer_checks = opt2;
- flag_reorder_blocks = opt2;
- flag_reorder_functions = opt2;
- flag_tree_vrp = opt2;
-@@ -922,6 +919,9 @@
-
- /* -O3 optimizations. */
- opt3 = (optimize >= 3);
-+ flag_strict_aliasing = opt3;
-+ flag_strict_overflow = opt3;
-+ flag_delete_null_pointer_checks = opt3;
- flag_predictive_commoning = opt3;
- flag_inline_functions = opt3;
- flag_unswitch_loops = opt3;
-@@ -1605,6 +1605,9 @@
- enable_warning_as_error (arg, value, lang_mask);
- break;
-
-+ case OPT_fhonour_copts:
-+ break;
-+
- case OPT_Wextra:
- set_Wextra (value);
- break;
---- a/gcc/doc/invoke.texi
-+++ b/gcc/doc/invoke.texi
-@@ -5699,7 +5699,7 @@
- second branch or a point immediately following it, depending on whether
- the condition is known to be true or false.
-
--Enabled at levels @option{-O2}, @option{-O3}, @option{-Os}.
-+Enabled at levels @option{-O3}.
-
- @item -fsplit-wide-types
- @opindex fsplit-wide-types
-@@ -5844,7 +5844,7 @@
- @option{-fno-delete-null-pointer-checks} to disable this optimization
- for programs which depend on that behavior.
-
--Enabled at levels @option{-O2}, @option{-O3}, @option{-Os}.
-+Enabled at levels @option{-O3}.
-
- @item -fexpensive-optimizations
- @opindex fexpensive-optimizations
---- a/gcc/java/jvspec.c
-+++ b/gcc/java/jvspec.c
-@@ -670,6 +670,7 @@
- class name. Append dummy `.c' that can be stripped by set_input so %b
- is correct. */
- set_input (concat (main_class_name, "main.c", NULL));
-+ putenv ("GCC_HONOUR_COPTS=s"); /* XXX hack! */
- err = do_spec (jvgenmain_spec);
- if (err == 0)
- {
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