mirror of
git://projects.qi-hardware.com/openwrt-xburst.git
synced 2024-12-18 21:54:03 +02:00
aa980fc463
git-svn-id: svn://svn.openwrt.org/openwrt/trunk@19348 3c298f89-4303-0410-b956-a3cf2f4a3e73
163 lines
4.5 KiB
Diff
163 lines
4.5 KiB
Diff
|
|
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
|
|
@@ -105,6 +105,9 @@
|
|
/* 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);
|
|
@@ -690,6 +701,12 @@
|
|
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;
|
|
@@ -1209,6 +1226,47 @@
|
|
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 +613,9 @@
|
|
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
|
|
@@ -573,6 +577,9 @@
|
|
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;
|
|
--- a/gcc/doc/invoke.texi
|
|
+++ b/gcc/doc/invoke.texi
|
|
@@ -5699,7 +5715,7 @@
|
|
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 +5860,7 @@
|
|
@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)
|
|
{
|