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authorkaloz <kaloz@3c298f89-4303-0410-b956-a3cf2f4a3e73>2010-01-25 10:52:23 +0000
committerkaloz <kaloz@3c298f89-4303-0410-b956-a3cf2f4a3e73>2010-01-25 10:52:23 +0000
commitdf201412d52af9aea8ba5e80916b8b03146e8309 (patch)
tree2efa277beec9c5bbc6d9022805c01ac0b62cde91 /toolchain/gcc/patches/4.4.1+cs/910-mbsd_multi.patch
parentc941f1cfbc302cfd6741959f0e1e4dcbe289704c (diff)
add preliminary support for the latest CodeSourcery toolchain
git-svn-id: svn://svn.openwrt.org/openwrt/trunk@19324 3c298f89-4303-0410-b956-a3cf2f4a3e73
Diffstat (limited to 'toolchain/gcc/patches/4.4.1+cs/910-mbsd_multi.patch')
-rw-r--r--toolchain/gcc/patches/4.4.1+cs/910-mbsd_multi.patch162
1 files changed, 162 insertions, 0 deletions
diff --git a/toolchain/gcc/patches/4.4.1+cs/910-mbsd_multi.patch b/toolchain/gcc/patches/4.4.1+cs/910-mbsd_multi.patch
new file mode 100644
index 000000000..52cbf22c7
--- /dev/null
+++ b/toolchain/gcc/patches/4.4.1+cs/910-mbsd_multi.patch
@@ -0,0 +1,162 @@
+
+ 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.
+ * 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-opts.c
++++ b/gcc/c-opts.c
+@@ -105,6 +105,9 @@
+ /* 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);
+@@ -690,6 +701,12 @@
+ 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;
+@@ -1209,6 +1226,47 @@
+ 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.opt
++++ b/gcc/c.opt
+@@ -609,6 +613,9 @@
+ 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
+@@ -573,6 +577,9 @@
+ 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
+@@ -896,9 +896,6 @@
+ flag_schedule_insns_after_reload = opt2;
+ #endif
+ flag_regmove = opt2;
+- flag_strict_aliasing = opt2;
+- flag_strict_overflow = opt2;
+- flag_delete_null_pointer_checks = opt2;
+ flag_reorder_blocks = opt2;
+ flag_reorder_functions = opt2;
+ flag_tree_vrp = opt2;
+@@ -922,6 +919,9 @@
+
+ /* -O3 optimizations. */
+ opt3 = (optimize >= 3);
++ flag_strict_aliasing = opt3;
++ flag_strict_overflow = opt3;
++ flag_delete_null_pointer_checks = opt3;
+ flag_predictive_commoning = opt3;
+ flag_inline_functions = opt3;
+ flag_unswitch_loops = opt3;
+--- a/gcc/doc/invoke.texi
++++ b/gcc/doc/invoke.texi
+@@ -5699,7 +5715,7 @@
+ 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
+@@ -5844,7 +5860,7 @@
+ @option{-fno-delete-null-pointer-checks} to disable this optimization
+ for programs which depend on that behavior.
+
+-Enabled at levels @option{-O2}, @option{-O3}, @option{-Os}.
++Enabled at levels @option{-O3}.
+
+ @item -fexpensive-optimizations
+ @opindex fexpensive-optimizations
+--- a/gcc/java/jvspec.c
++++ b/gcc/java/jvspec.c
+@@ -670,6 +670,7 @@
+ 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)
+ {