From a056a9868e6ecab24b0b7e4e12e846097b8c8fb0 Mon Sep 17 00:00:00 2001
From: Richard Biener <rguenther@suse.de>
Date: Wed, 10 May 2023 15:36:12 +0200
Subject: [PATCH] Avoid g++.dg/torture/pr106922.C FAIL with the pre-C++11 ABI
The following forces the g++.dg/torture/pr106922.C testcase to use
the C++11 libstdc++ ABI and checks whether that worked.
gcc/testsuite/
* g++.dg/torture/pr106922.C: Force _GLIBCXX_USE_CXX11_ABI to 1.
---
gcc/testsuite/g++.dg/torture/pr106922.C | 9 +++++++++
1 file changed, 9 insertions(+)
diff --git a/gcc/testsuite/g++.dg/torture/pr106922.C b/gcc/testsuite/g++.dg/torture/pr106922.C
index 046fc6cce76a..b0c1489fbdc4 100644
--- a/gcc/testsuite/g++.dg/torture/pr106922.C
+++ b/gcc/testsuite/g++.dg/torture/pr106922.C
@@ -4,8 +4,16 @@
// -O1 doesn't iterate VN and thus has bogus uninit diagnostics
// { dg-skip-if "" { *-*-* } { "-O1" } { "" } }
+// The testcase still emits bogus diagnostics with the pre-C++11 ABI
+#undef _GLIBCXX_USE_CXX11_ABI
+#define _GLIBCXX_USE_CXX11_ABI 1
+
#include <vector>
+// When the library is not dual-ABI and defaults to old just compile
+// an empty TU
+#if _GLIBCXX_USE_CXX11_ABI
+
#include <optional>
template <class T>
using Optional = std::optional<T>;
@@ -46,3 +54,4 @@ void test()
externals.external2 = internal2;
}
}
+#endif
--
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