+++ /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.
- * -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)
- {
projects / openwrt-10.03 / .git / blobdiff