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146 lines
4.5 KiB
146 lines
4.5 KiB
commit 99368862e44740ff4fd33760893f04e14f9dbdf1
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Author: Felix Fietkau <nbd@openwrt.org>
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Date: Tue Jul 31 00:52:27 2007 +0000
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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
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SVN-Revision: 8256
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This patch brings over a feature from MirBSD:
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* -fhonour-copts
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If this option is not given, it's warned (depending
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on environment variables). This is to catch errors
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of misbuilt packages which override CFLAGS themselves.
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This patch was authored by Thorsten Glaser <tg at mirbsd.de>
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with copyright assignment to the FSF in effect.
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--- a/gcc/c-family/c-opts.c
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+++ b/gcc/c-family/c-opts.c
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@@ -107,6 +107,9 @@ static dump_flags_t original_dump_flags;
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/* Whether any standard preincluded header has been preincluded. */
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static bool done_preinclude;
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+/* Check if a port honours COPTS. */
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+static int honour_copts = 0;
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+
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static void handle_OPT_d (const char *);
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static void set_std_cxx98 (int);
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static void set_std_cxx11 (int);
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@@ -459,6 +462,12 @@ c_common_handle_option (size_t scode, co
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flag_no_builtin = !value;
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break;
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+ case OPT_fhonour_copts:
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+ if (c_language == clk_c) {
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+ honour_copts++;
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+ }
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+ break;
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+
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case OPT_fconstant_string_class_:
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constant_string_class_name = arg;
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break;
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@@ -1125,6 +1134,47 @@ c_common_init (void)
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return false;
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}
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+ if (c_language == clk_c) {
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+ char *ev = getenv ("GCC_HONOUR_COPTS");
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+ int evv;
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+ if (ev == NULL)
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+ evv = -1;
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+ else if ((*ev == '0') || (*ev == '\0'))
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+ evv = 0;
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+ else if (*ev == '1')
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+ evv = 1;
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+ else if (*ev == '2')
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+ evv = 2;
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+ else if (*ev == 's')
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+ evv = -1;
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+ else {
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+ warning (0, "unknown GCC_HONOUR_COPTS value, assuming 1");
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+ evv = 1; /* maybe depend this on something like MIRBSD_NATIVE? */
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+ }
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+ if (evv == 1) {
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+ if (honour_copts == 0) {
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+ error ("someone does not honour COPTS at all in lenient mode");
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+ return false;
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+ } else if (honour_copts != 1) {
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+ warning (0, "someone does not honour COPTS correctly, passed %d times",
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+ honour_copts);
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+ }
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+ } else if (evv == 2) {
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+ if (honour_copts == 0) {
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+ error ("someone does not honour COPTS at all in strict mode");
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+ return false;
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+ } else if (honour_copts != 1) {
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+ error ("someone does not honour COPTS correctly, passed %d times",
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+ honour_copts);
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+ return false;
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+ }
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+ } else if (evv == 0) {
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+ if (honour_copts != 1)
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+ inform (UNKNOWN_LOCATION, "someone does not honour COPTS correctly, passed %d times",
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+ honour_copts);
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+ }
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+ }
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+
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return true;
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}
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--- a/gcc/c-family/c.opt
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+++ b/gcc/c-family/c.opt
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@@ -1469,6 +1469,9 @@ C++ ObjC++ Optimization Alias(fexception
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fhonor-std
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C++ ObjC++ Ignore Warn(switch %qs is no longer supported)
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+fhonour-copts
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+C ObjC C++ ObjC++ RejectNegative
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+
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fhosted
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C ObjC
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Assume normal C execution environment.
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--- a/gcc/common.opt
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+++ b/gcc/common.opt
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@@ -1551,6 +1551,9 @@ fguess-branch-probability
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Common Report Var(flag_guess_branch_prob) Optimization
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Enable guessing of branch probabilities.
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+fhonour-copts
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+Common RejectNegative
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+
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; Nonzero means ignore `#ident' directives. 0 means handle them.
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; Generate position-independent code for executables if possible
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; On SVR4 targets, it also controls whether or not to emit a
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--- a/gcc/opts.c
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+++ b/gcc/opts.c
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@@ -2073,6 +2073,9 @@ common_handle_option (struct gcc_options
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opts, opts_set, loc, dc);
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break;
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+ case OPT_fhonour_copts:
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+ break;
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+
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case OPT_Wlarger_than_:
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opts->x_larger_than_size = value;
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opts->x_warn_larger_than = value != -1;
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--- a/gcc/doc/invoke.texi
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+++ b/gcc/doc/invoke.texi
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@@ -7013,6 +7013,17 @@ This option is only supported for C and
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@option{-Wall} and by @option{-Wpedantic}, which can be disabled with
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@option{-Wno-pointer-sign}.
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+@item -fhonour-copts
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+@opindex fhonour-copts
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+If @env{GCC_HONOUR_COPTS} is set to 1, abort if this option is not
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+given at least once, and warn if it is given more than once.
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+If @env{GCC_HONOUR_COPTS} is set to 2, abort if this option is not
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+given exactly once.
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+If @env{GCC_HONOUR_COPTS} is set to 0 or unset, warn if this option
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+is not given exactly once.
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+The warning is quelled if @env{GCC_HONOUR_COPTS} is set to @samp{s}.
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+This flag and environment variable only affect the C language.
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+
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@item -Wstack-protector
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@opindex Wstack-protector
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@opindex Wno-stack-protector
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