* [2.26 COMMITTED] Ignore -Wrestrict for one strncat test.
@ 2018-01-01 0:00 Florian Weimer
0 siblings, 0 replies; only message in thread
From: Florian Weimer @ 2018-01-01 0:00 UTC (permalink / raw)
To: libc-stable
From: Joseph Myers <joseph@codesourcery.com>
With current GCC mainline, one strncat test involving a size close to
SIZE_MAX results in a -Wrestrict warning that that buffer size would
imply that the two buffers must overlap. This patch fixes the build
by adding disabling of -Wrestrict (for GCC versions supporting that
option) to the already-present disabling of -Wstringop-overflow= and
-Warray-bounds for this test.
Tested with build-many-glibcs.py that this restores the testsuite
build with GCC mainline for aarch64-linux-gnu.
* string/tester.c (test_strncat) [__GNUC_PREREQ (7, 0)]: Also
ignore -Wrestrict for one test.
(cherry picked from commit 35ebb6b0c48bc671d9c54e089884f9bf6fca540e)
2018-06-14 Joseph Myers <joseph@codesourcery.com>
* string/tester.c (test_strncat) [__GNUC_PREREQ (7, 0)]: Also
ignore -Wrestrict for one test.
diff --git a/string/tester.c b/string/tester.c
index 02ea8e1e16..8fdbe3de13 100644
--- a/string/tester.c
+++ b/string/tester.c
@@ -485,6 +485,10 @@ test_strncat (void)
deliberately tested here; GCC 8 gives a -Warray-bounds
warning about this. */
DIAG_IGNORE_NEEDS_COMMENT (7, "-Wstringop-overflow=");
+ /* GCC 9 as of 2018-06-14 warns that the size passed is
+ large enough that, if it were the actual object size,
+ the objects would have to overlap. */
+ DIAG_IGNORE_NEEDS_COMMENT (9, "-Wrestrict");
#endif
DIAG_IGNORE_NEEDS_COMMENT (8, "-Warray-bounds");
check (strncat (buf1 + n2, buf2 + n1, ~((size_t) 0) - n4)
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2018-01-01 0:00 [2.26 COMMITTED] Ignore -Wrestrict for one strncat test Florian Weimer
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