mirror of
https://github.com/openwrt/openwrt.git
synced 2024-12-29 18:19:02 +00:00
254 lines
8.5 KiB
Diff
254 lines
8.5 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.
|
|
* -Werror-maybe-reset
|
|
Has the effect of -Wno-error if GCC_NO_WERROR is
|
|
set and not '0', a no-operation otherwise. This is
|
|
to be able to use -Werror in "make" but prevent
|
|
GNU autoconf generated configure scripts from
|
|
freaking out.
|
|
* 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-family/c-opts.c
|
|
+++ b/gcc/c-family/c-opts.c
|
|
@@ -104,6 +104,9 @@ static size_t include_cursor;
|
|
/* Whether any standard preincluded header has been preincluded. */
|
|
static bool done_preinclude;
|
|
|
|
+/* Check if a port honours COPTS. */
|
|
+static int honour_copts = 0;
|
|
+
|
|
static void handle_OPT_d (const char *);
|
|
static void set_std_cxx98 (int);
|
|
static void set_std_cxx11 (int);
|
|
@@ -383,6 +386,9 @@ c_common_handle_option (size_t scode, co
|
|
cpp_opts->warn_endif_labels = value;
|
|
break;
|
|
|
|
+ case OPT_Werror_maybe_reset:
|
|
+ break;
|
|
+
|
|
case OPT_Winvalid_pch:
|
|
cpp_opts->warn_invalid_pch = value;
|
|
break;
|
|
@@ -491,6 +497,12 @@ c_common_handle_option (size_t scode, co
|
|
flag_no_builtin = !value;
|
|
break;
|
|
|
|
+ case OPT_fhonour_copts:
|
|
+ if (c_language == clk_c) {
|
|
+ honour_copts++;
|
|
+ }
|
|
+ break;
|
|
+
|
|
case OPT_fconstant_string_class_:
|
|
constant_string_class_name = arg;
|
|
break;
|
|
@@ -1027,6 +1039,47 @@ c_common_init (void)
|
|
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-family/c.opt
|
|
+++ b/gcc/c-family/c.opt
|
|
@@ -379,6 +379,10 @@ Werror-implicit-function-declaration
|
|
C ObjC RejectNegative Warning Alias(Werror=, implicit-function-declaration)
|
|
This switch is deprecated; use -Werror=implicit-function-declaration instead
|
|
|
|
+Werror-maybe-reset
|
|
+C ObjC C++ ObjC++
|
|
+; Documented in common.opt
|
|
+
|
|
Wfloat-equal
|
|
C ObjC C++ ObjC++ Var(warn_float_equal) Warning
|
|
Warn if testing floating point numbers for equality
|
|
@@ -949,6 +953,9 @@ C++ ObjC++ Optimization Alias(fexception
|
|
fhonor-std
|
|
C++ ObjC++ Ignore Warn(switch %qs is no longer supported)
|
|
|
|
+fhonour-copts
|
|
+C ObjC C++ ObjC++ RejectNegative
|
|
+
|
|
fhosted
|
|
C ObjC
|
|
Assume normal C execution environment
|
|
--- a/gcc/common.opt
|
|
+++ b/gcc/common.opt
|
|
@@ -541,6 +541,10 @@ Werror=
|
|
Common Joined
|
|
Treat specified warning as error
|
|
|
|
+Werror-maybe-reset
|
|
+Common
|
|
+If environment variable GCC_NO_WERROR is set, act as -Wno-error
|
|
+
|
|
Wextra
|
|
Common Var(extra_warnings) Warning
|
|
Print extra (possibly unwanted) warnings
|
|
@@ -1242,6 +1246,9 @@ fguess-branch-probability
|
|
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
|
|
@@ -468,8 +468,6 @@ static const struct default_options defa
|
|
{ OPT_LEVELS_2_PLUS, OPT_fschedule_insns2, NULL, 1 },
|
|
#endif
|
|
{ OPT_LEVELS_2_PLUS, OPT_fregmove, NULL, 1 },
|
|
- { OPT_LEVELS_2_PLUS, OPT_fstrict_aliasing, NULL, 1 },
|
|
- { OPT_LEVELS_2_PLUS, OPT_fstrict_overflow, NULL, 1 },
|
|
{ OPT_LEVELS_2_PLUS, OPT_freorder_blocks, NULL, 1 },
|
|
{ OPT_LEVELS_2_PLUS, OPT_freorder_functions, NULL, 1 },
|
|
{ OPT_LEVELS_2_PLUS, OPT_ftree_vrp, NULL, 1 },
|
|
@@ -488,6 +486,8 @@ static const struct default_options defa
|
|
{ OPT_LEVELS_2_PLUS, OPT_fhoist_adjacent_loads, NULL, 1 },
|
|
|
|
/* -O3 optimizations. */
|
|
+ { OPT_LEVELS_3_PLUS, OPT_fstrict_aliasing, NULL, 1 },
|
|
+ { OPT_LEVELS_3_PLUS, OPT_fstrict_overflow, NULL, 1 },
|
|
{ OPT_LEVELS_3_PLUS, OPT_ftree_loop_distribute_patterns, NULL, 1 },
|
|
{ OPT_LEVELS_3_PLUS, OPT_fpredictive_commoning, NULL, 1 },
|
|
/* Inlining of functions reducing size is a good idea with -Os
|
|
@@ -1423,6 +1423,17 @@ common_handle_option (struct gcc_options
|
|
opts, opts_set, loc, dc);
|
|
break;
|
|
|
|
+ case OPT_Werror_maybe_reset:
|
|
+ {
|
|
+ char *ev = getenv ("GCC_NO_WERROR");
|
|
+ if ((ev != NULL) && (*ev != '0'))
|
|
+ warnings_are_errors = 0;
|
|
+ }
|
|
+ break;
|
|
+
|
|
+ case OPT_fhonour_copts:
|
|
+ break;
|
|
+
|
|
case OPT_Wlarger_than_:
|
|
opts->x_larger_than_size = value;
|
|
opts->x_warn_larger_than = value != -1;
|
|
--- a/gcc/doc/cppopts.texi
|
|
+++ b/gcc/doc/cppopts.texi
|
|
@@ -163,6 +163,11 @@ in older programs. This warning is on b
|
|
Make all warnings into hard errors. Source code which triggers warnings
|
|
will be rejected.
|
|
|
|
+ at item -Werror-maybe-reset
|
|
+ at opindex Werror-maybe-reset
|
|
+Act like @samp{-Wno-error} if the @env{GCC_NO_WERROR} environment
|
|
+variable is set to anything other than 0 or empty.
|
|
+
|
|
@item -Wsystem-headers
|
|
@opindex Wsystem-headers
|
|
Issue warnings for code in system headers. These are normally unhelpful
|
|
--- a/gcc/doc/invoke.texi
|
|
+++ b/gcc/doc/invoke.texi
|
|
@@ -240,7 +240,7 @@ Objective-C and Objective-C++ Dialects}.
|
|
-Wconversion -Wcoverage-mismatch -Wno-cpp -Wno-deprecated @gol
|
|
-Wno-deprecated-declarations -Wdisabled-optimization @gol
|
|
-Wno-div-by-zero -Wdouble-promotion -Wempty-body -Wenum-compare @gol
|
|
--Wno-endif-labels -Werror -Werror=* @gol
|
|
+-Wno-endif-labels -Werror -Werror=* -Werror-maybe-reset @gol
|
|
-Wfatal-errors -Wfloat-equal -Wformat -Wformat=2 @gol
|
|
-Wno-format-contains-nul -Wno-format-extra-args -Wformat-nonliteral @gol
|
|
-Wformat-security -Wformat-y2k @gol
|
|
@@ -4809,6 +4809,22 @@ This option is only supported for C and
|
|
@option{-Wall} and by @option{-Wpedantic}, which can be disabled with
|
|
@option{-Wno-pointer-sign}.
|
|
|
|
+ at item -Werror-maybe-reset
|
|
+ at opindex Werror-maybe-reset
|
|
+Act like @samp{-Wno-error} if the @env{GCC_NO_WERROR} environment
|
|
+variable is set to anything other than 0 or empty.
|
|
+
|
|
+ at item -fhonour-copts
|
|
+ at opindex fhonour-copts
|
|
+If @env{GCC_HONOUR_COPTS} is set to 1, abort if this option is not
|
|
+given at least once, and warn if it is given more than once.
|
|
+If @env{GCC_HONOUR_COPTS} is set to 2, abort if this option is not
|
|
+given exactly once.
|
|
+If @env{GCC_HONOUR_COPTS} is set to 0 or unset, warn if this option
|
|
+is not given exactly once.
|
|
+The warning is quelled if @env{GCC_HONOUR_COPTS} is set to @samp{s}.
|
|
+This flag and environment variable only affect the C language.
|
|
+
|
|
@item -Wstack-protector
|
|
@opindex Wstack-protector
|
|
@opindex Wno-stack-protector
|
|
@@ -6920,7 +6936,7 @@ so, the first branch is redirected to ei
|
|
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
|
|
--- a/gcc/java/jvspec.c
|
|
+++ b/gcc/java/jvspec.c
|
|
@@ -626,6 +626,7 @@ lang_specific_pre_link (void)
|
|
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)
|
|
{
|