mirror of
git://projects.qi-hardware.com/openwrt-xburst.git
synced 2024-08-26 13:41:30 +03:00
git-svn-id: svn://svn.openwrt.org/openwrt/trunk@18019 3c298f89-4303-0410-b956-a3cf2f4a3e73
279 lines
8.7 KiB
Diff
279 lines
8.7 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@mirbsd.de>
|
|
with copyright assignment to the FSF in effect.
|
|
|
|
--- a/gcc/c-opts.c
|
|
+++ b/gcc/c-opts.c
|
|
@@ -109,6 +109,9 @@ static size_t deferred_count;
|
|
/* 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);
|
|
@@ -502,6 +505,14 @@ c_common_handle_option (size_t scode, co
|
|
mesg_implicit_function_declaration = 2;
|
|
break;
|
|
|
|
+ case OPT_Werror_maybe_reset:
|
|
+ {
|
|
+ char *ev = getenv ("GCC_NO_WERROR");
|
|
+ if ((ev != NULL) && (*ev != '0'))
|
|
+ cpp_opts->warnings_are_errors = 0;
|
|
+ }
|
|
+ break;
|
|
+
|
|
case OPT_Wformat:
|
|
set_Wformat (value);
|
|
break;
|
|
@@ -778,6 +789,12 @@ c_common_handle_option (size_t scode, co
|
|
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;
|
|
@@ -1295,6 +1312,47 @@ c_common_init (void)
|
|
/* Has to wait until now so that cpplib has its hash table. */
|
|
init_pragma ();
|
|
|
|
+ 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 ("someone does not honour COPTS correctly, passed %d times",
|
|
+ honour_copts);
|
|
+ }
|
|
+ }
|
|
+
|
|
return true;
|
|
}
|
|
|
|
--- a/gcc/c.opt
|
|
+++ b/gcc/c.opt
|
|
@@ -220,6 +220,10 @@ C ObjC C++ ObjC++
|
|
Warn about extra tokens at the end of prepreprocessor directives
|
|
; APPLE LOCAL end -Wextra-tokens
|
|
|
|
+Werror-maybe-reset
|
|
+C ObjC C++ ObjC++
|
|
+; Documented in common.opt
|
|
+
|
|
Wfloat-equal
|
|
C ObjC C++ ObjC++ Var(warn_float_equal)
|
|
Warn if testing floating point numbers for equality
|
|
@@ -675,6 +679,9 @@ C++ ObjC++
|
|
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
|
|
@@ -81,6 +81,10 @@ 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
|
|
Print extra (possibly unwanted) warnings
|
|
@@ -607,6 +611,9 @@ Common Report Var(flag_guess_branch_prob
|
|
Enable guessing of branch probabilities
|
|
; APPLE LOCAL end optimization pragmas 3124235/3420242
|
|
|
|
+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
|
|
@@ -507,9 +507,6 @@ void set_flags_from_O (unsigned int cmdl
|
|
#endif
|
|
flag_regmove = 1;
|
|
/* APPLE LOCAL optimization pragmas 3124235/3420242 */
|
|
- if (cmdline) flag_strict_aliasing = 1;
|
|
- flag_strict_overflow = 1;
|
|
- flag_delete_null_pointer_checks = 1;
|
|
flag_reorder_blocks = 1;
|
|
/* APPLE LOCAL optimization pragmas 3124235/3420242 */
|
|
if (cmdline) flag_reorder_functions = 1;
|
|
@@ -536,6 +533,9 @@ void set_flags_from_O (unsigned int cmdl
|
|
|
|
if (optimize >= 3)
|
|
{
|
|
+ if (cmdline) flag_strict_aliasing = 1;
|
|
+ flag_strict_overflow = 1;
|
|
+ flag_delete_null_pointer_checks = 1;
|
|
if (cmdline)
|
|
flag_inline_functions = 1;
|
|
flag_unswitch_loops = 1;
|
|
@@ -873,6 +873,17 @@ common_handle_option (size_t scode, cons
|
|
}
|
|
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_Wextra:
|
|
set_Wextra (value);
|
|
break;
|
|
--- a/gcc/doc/cppopts.texi
|
|
+++ b/gcc/doc/cppopts.texi
|
|
@@ -166,6 +166,11 @@ in older programs. This warning is on b
|
|
Make all warnings into hard errors. Source code which triggers warnings
|
|
will be rejected.
|
|
|
|
+@item -Werror-maybe-reset
|
|
+@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
|
|
@@ -282,7 +282,7 @@ Objective-C and Objective-C++ Dialects}.
|
|
-Wc++-compat -Wcast-align -Wcast-qual -Wchar-subscripts -Wcomment @gol
|
|
-Wconversion -Wno-deprecated-declarations @gol
|
|
-Wdisabled-optimization -Wno-div-by-zero -Wno-endif-labels @gol
|
|
--Werror -Werror=* -Werror-implicit-function-declaration @gol
|
|
+-Werror -Werror-maybe-reset -Werror=* -Werror-implicit-function-declaration @gol
|
|
@c APPLE LOCAL default to Wformat-security 5764921
|
|
-Wfatal-errors -Wfloat-equal -Wno-format -Wformat=2 @gol
|
|
-Wno-format-extra-args -Wformat-nonliteral @gol
|
|
@@ -4031,6 +4031,22 @@ Note that specifying @option{-Werror=}@v
|
|
@option{-W}@var{foo}. However, @option{-Wno-error=}@var{foo} does not
|
|
imply anything.
|
|
|
|
+@item -Werror-maybe-reset
|
|
+@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 -fhonour-copts
|
|
+@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
|
|
This option is only active when @option{-fstack-protector} is active. It
|
|
@@ -5533,7 +5549,7 @@ second branch or a point immediately fol
|
|
the condition is known to be true or false.
|
|
|
|
@c APPLE LOCAL 4231761 -Oz
|
|
-Enabled at levels @option{-O2}, @option{-O3}, @option{-Os}, @option{-Oz} (APPLE ONLY).
|
|
+Enabled at levels @option{-O3}, @option{-Oz} (APPLE ONLY).
|
|
|
|
@item -fcse-follow-jumps
|
|
@opindex fcse-follow-jumps
|
|
@@ -5659,7 +5675,7 @@ safely dereference null pointers. Use
|
|
for programs which depend on that behavior.
|
|
|
|
@c APPLE LOCAL 4231761 -Oz
|
|
-Enabled at levels @option{-O2}, @option{-O3}, @option{-Os}, @option{-Oz} (APPLE ONLY).
|
|
+Enabled at levels @option{-O3}, @option{-Oz} (APPLE ONLY).
|
|
|
|
@item -fexpensive-optimizations
|
|
@opindex fexpensive-optimizations
|
|
@@ -6103,7 +6119,7 @@ allowed to alias. For an example, see t
|
|
@code{c_get_alias_set}.
|
|
|
|
@c APPLE LOCAL 4231761 -Oz
|
|
-Enabled at levels @option{-O2}, @option{-O3}, @option{-Os}, @option{-Oz} (APPLE ONLY).
|
|
+Enabled at levels @option{-O3}, @option{-Oz} (APPLE ONLY).
|
|
|
|
@item -fstrict-overflow
|
|
@opindex fstrict-overflow
|
|
--- a/gcc/java/jvspec.c
|
|
+++ b/gcc/java/jvspec.c
|
|
@@ -632,6 +632,7 @@ 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)
|
|
{
|