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* [gcc r11-6072] libstdc++: Use init_priority attribute for Init object [PR 98108]
@ 2020-12-15 11:45 Jonathan Wakely
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From: Jonathan Wakely @ 2020-12-15 11:45 UTC (permalink / raw)
To: gcc-cvs, libstdc++-cvs
https://gcc.gnu.org/g:cf4ed3b41594b6935a337fe0aaf8149eadf88751
commit r11-6072-gcf4ed3b41594b6935a337fe0aaf8149eadf88751
Author: Jonathan Wakely <jwakely@redhat.com>
Date: Tue Dec 15 11:40:06 2020 +0000
libstdc++: Use init_priority attribute for Init object [PR 98108]
This causes the global objects that run the <iostream> initialization
code to be constructed earlier, which avoids some bugs in user code due
to incorrectly relying on static initialization order.
libstdc++-v3/ChangeLog:
PR libstdc++/98108
* include/std/iostream (__ioinit): Add init_priority attribute.
Diff:
---
libstdc++-v3/include/std/iostream | 10 +++++++++-
1 file changed, 9 insertions(+), 1 deletion(-)
diff --git a/libstdc++-v3/include/std/iostream b/libstdc++-v3/include/std/iostream
index f988342b90a..6b2f964f688 100644
--- a/libstdc++-v3/include/std/iostream
+++ b/libstdc++-v3/include/std/iostream
@@ -70,8 +70,16 @@ _GLIBCXX_BEGIN_NAMESPACE_VERSION
#endif
//@}
+#if __has_attribute(__init_priority__)
+# define _GLIBCXX_INIT_PRIO(N) __attribute__((__init_priority__(N)))
+#else
+# define _GLIBCXX_INIT_PRIO(N)
+#endif
+
// For construction of filebuffers for cout, cin, cerr, clog et. al.
- static ios_base::Init __ioinit;
+ static ios_base::Init __ioinit _GLIBCXX_INIT_PRIO(90);
+
+#undef _GLIBCXX_INIT_PRIO
_GLIBCXX_END_NAMESPACE_VERSION
} // namespace
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