- commit 99368862e44740ff4fd33760893f04e14f9dbdf1
- Author: Felix Fietkau <nbd@openwrt.org>
- Date: Tue Jul 31 00:52:27 2007 +0000
-
- Port the mbsd_multi patch from freewrt, which adds -fhonour-copts. This will emit warnings in packages that don't use our target cflags properly
-
- SVN-Revision: 8256
-
- This patch brings over a feature 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.
-
- 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
- @@ -107,6 +107,9 @@ static dump_flags_t original_dump_flags;
- /* 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);
- @@ -459,6 +462,12 @@ 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;
- @@ -1125,6 +1134,47 @@ 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 (UNKNOWN_LOCATION, "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
- @@ -1469,6 +1469,9 @@ 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
- @@ -1551,6 +1551,9 @@ 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
- @@ -2073,6 +2073,9 @@ common_handle_option (struct gcc_options
- opts, opts_set, loc, dc);
- 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/invoke.texi
- +++ b/gcc/doc/invoke.texi
- @@ -7013,6 +7013,17 @@ This option is only supported for C and
- @option{-Wall} and by @option{-Wpedantic}, which can be disabled with
- @option{-Wno-pointer-sign}.
-
- +@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
- @opindex Wno-stack-protector
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