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* [gcc r12-5874] libstdc++: Disable over-zealous warnings about std::string copies [PR103332]
@ 2021-12-09 23:24 Jonathan Wakely
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From: Jonathan Wakely @ 2021-12-09 23:24 UTC (permalink / raw)
To: gcc-cvs, libstdc++-cvs
https://gcc.gnu.org/g:f8463b0e3ec2438b4cfb8c9a468d59761db2c8a0
commit r12-5874-gf8463b0e3ec2438b4cfb8c9a468d59761db2c8a0
Author: Jonathan Wakely <jwakely@redhat.com>
Date: Thu Dec 2 13:19:41 2021 +0000
libstdc++: Disable over-zealous warnings about std::string copies [PR103332]
These warnings are triggered by perfectly valid code using std::string.
They're particularly bad when --enable-fully-dynamic-string is used,
because even std::string().begin() will give a warning.
Use pragmas to stop the troublesome warnings for copies done by
std::char_traits.
libstdc++-v3/ChangeLog:
PR libstdc++/103332
PR libstdc++/102958
PR libstdc++/103483
* include/bits/char_traits.h: Suppress stringop and array-bounds
warnings.
Diff:
---
libstdc++-v3/include/bits/char_traits.h | 7 +++++++
1 file changed, 7 insertions(+)
diff --git a/libstdc++-v3/include/bits/char_traits.h b/libstdc++-v3/include/bits/char_traits.h
index da3e0ffffaa..3f7befcf8b2 100644
--- a/libstdc++-v3/include/bits/char_traits.h
+++ b/libstdc++-v3/include/bits/char_traits.h
@@ -54,6 +54,11 @@ namespace __gnu_cxx _GLIBCXX_VISIBILITY(default)
{
_GLIBCXX_BEGIN_NAMESPACE_VERSION
+#pragma GCC diagnostic push
+#pragma GCC diagnostic ignored "-Wstringop-overflow"
+#pragma GCC diagnostic ignored "-Wstringop-overread"
+#pragma GCC diagnostic ignored "-Warray-bounds"
+
/**
* @brief Mapping from character type to associated types.
*
@@ -990,6 +995,8 @@ _GLIBCXX_BEGIN_NAMESPACE_VERSION
} // namespace __detail
#endif // C++20
+#pragma GCC diagnostic push
+
_GLIBCXX_END_NAMESPACE_VERSION
} // namespace
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