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From 992665eab6c48d6a4819f42509346d24b277485d Mon Sep 17 00:00:00 2001
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From: David Malcolm <dmalcolm@redhat.com>
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Date: Thu, 2 Sep 2021 16:17:29 -0400
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Subject: [PATCH 15/17] Conditionalize test for PR libstdc++/87135 on
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__LIBSTDCXX_SO_VERSION >= 9
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This VERIFY was added upstream 2018-09-18 as part of:
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re PR libstdc++/87135 ([C++17] unordered containers violate iterator validity requirements)
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https://gcc.gnu.org/git/?p=gcc.git;a=commitdiff;h=a521e62615e439aea7502a52fd0f8a21eaa6304f
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but fails when run in DTS against a system libstdc++.so from an older GCC.
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In particular, rehash from the header is using
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std::__detail::_Prime_rehash_policy::_M_next_bkt
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from the system .so:
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12: 0000000000000000 0 FUNC GLOBAL DEFAULT UNDEF std::__detail::_Prime_rehash_policy::_M_next_bkt(unsigned long) const@GLIBCXX_3.4.18 (5)
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225: 0000000000000000 0 FUNC GLOBAL DEFAULT UNDEF std::__detail::_Prime_rehash_policy::_M_next_bkt(unsigned long) const@@GLIBCXX_3.4.18
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---
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.../23_containers/unordered_map/modifiers/reserve.cc | 4 ++++
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1 file changed, 4 insertions(+)
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diff --git a/libstdc++-v3/testsuite/23_containers/unordered_map/modifiers/reserve.cc b/libstdc++-v3/testsuite/23_containers/unordered_map/modifiers/reserve.cc
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index 58c8924b9..4c79ec2e6 100644
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--- a/libstdc++-v3/testsuite/23_containers/unordered_map/modifiers/reserve.cc
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+++ b/libstdc++-v3/testsuite/23_containers/unordered_map/modifiers/reserve.cc
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@@ -46,7 +46,11 @@ void test01()
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// As long as we insert less than the reserved number of elements we
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// shouldn't experiment any rehash.
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+
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+ // Fixed upstream in GCC 9
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+#if __LIBSTDCXX_SO_VERSION >= 9
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VERIFY( m.bucket_count() == bkts );
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+#endif
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VERIFY( m.load_factor() <= m.max_load_factor() );
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}
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--
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2.31.1
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