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* [gcc r13-424] libstdc++: Add macros for the inline namespace std::_V2
@ 2022-05-13 12:34 Jonathan Wakely
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From: Jonathan Wakely @ 2022-05-13 12:34 UTC (permalink / raw)
To: gcc-cvs, libstdc++-cvs
https://gcc.gnu.org/g:e4905f11852d722cd711b53a5626245528ace1d2
commit r13-424-ge4905f11852d722cd711b53a5626245528ace1d2
Author: Jonathan Wakely <jwakely@redhat.com>
Date: Wed May 11 16:35:45 2022 +0100
libstdc++: Add macros for the inline namespace std::_V2
Use macros to open and close the inline namespace _V2 that is used for
ABI versioning of individual components such as chrono::system_clock.
This allows the namespace to be hidden in the docs generated by Doxygen,
so that we document std::foo instead of std::_V2::foo.
This also makes it easy to remove that namespace entirely for the
gnu-versioned-namespace build, where everything is already versioned as
std::__8 and there are no backwards compatibility guarantees.
libstdc++-v3/ChangeLog:
* doc/doxygen/user.cfg.in (PREDEFINED): Expand new macros to
nothing.
* include/bits/c++config (_GLIBCXX_BEGIN_INLINE_ABI_NAMESPACE)
(_GLIBCXX_END_INLINE_ABI_NAMESPACE): Define new macros.
* include/bits/algorithmfwd.h (_V2::__rotate): Use new macros
for the namespace.
* include/bits/chrono.h (chrono::_V2::system_clock): Likewise.
* include/bits/stl_algo.h (_V2::__rotate): Likewise.
* include/std/condition_variable (_V2::condition_variable_any):
Likewise.
* include/std/system_error (_V2::error_category): Likewise.
Diff:
---
libstdc++-v3/doc/doxygen/user.cfg.in | 2 ++
libstdc++-v3/include/bits/algorithmfwd.h | 15 ++++++++-------
libstdc++-v3/include/bits/c++config | 11 +++++++++--
libstdc++-v3/include/bits/chrono.h | 4 ++--
libstdc++-v3/include/bits/stl_algo.h | 5 ++---
libstdc++-v3/include/std/condition_variable | 4 ++--
libstdc++-v3/include/std/system_error | 5 +++--
7 files changed, 28 insertions(+), 18 deletions(-)
diff --git a/libstdc++-v3/doc/doxygen/user.cfg.in b/libstdc++-v3/doc/doxygen/user.cfg.in
index b9babc3993e..2dbed727013 100644
--- a/libstdc++-v3/doc/doxygen/user.cfg.in
+++ b/libstdc++-v3/doc/doxygen/user.cfg.in
@@ -2347,6 +2347,8 @@ PREDEFINED = __cplusplus=202002L \
"_GLIBCXX_END_NAMESPACE_CONTAINER= " \
"_GLIBCXX_END_NAMESPACE_CXX11= " \
"_GLIBCXX_END_NAMESPACE_LDBL= " \
+ "-D_GLIBCXX_BEGIN_INLINE_ABI_NAMESPACE(X)= " \
+ "-D_GLIBCXX_END_INLINE_ABI_NAMESPACE(X)= " \
"_GLIBCXX_TEMPLATE_ARGS=... " \
"_GLIBCXX_DEPRECATED= " \
"_GLIBCXX_DEPRECATED_SUGGEST(E)= " \
diff --git a/libstdc++-v3/include/bits/algorithmfwd.h b/libstdc++-v3/include/bits/algorithmfwd.h
index 5271a90b501..aacc34e09e8 100644
--- a/libstdc++-v3/include/bits/algorithmfwd.h
+++ b/libstdc++-v3/include/bits/algorithmfwd.h
@@ -601,13 +601,14 @@ _GLIBCXX_BEGIN_NAMESPACE_VERSION
_OIter
reverse_copy(_BIter, _BIter, _OIter);
- inline namespace _V2
- {
- template<typename _FIter>
- _GLIBCXX20_CONSTEXPR
- _FIter
- rotate(_FIter, _FIter, _FIter);
- }
+_GLIBCXX_BEGIN_INLINE_ABI_NAMESPACE(_V2)
+
+ template<typename _FIter>
+ _GLIBCXX20_CONSTEXPR
+ _FIter
+ rotate(_FIter, _FIter, _FIter);
+
+_GLIBCXX_END_INLINE_ABI_NAMESPACE(_V2)
template<typename _FIter, typename _OIter>
_GLIBCXX20_CONSTEXPR
diff --git a/libstdc++-v3/include/bits/c++config b/libstdc++-v3/include/bits/c++config
index 2798b9786dc..150b0bc5834 100644
--- a/libstdc++-v3/include/bits/c++config
+++ b/libstdc++-v3/include/bits/c++config
@@ -345,13 +345,16 @@ namespace __gnu_cxx
# define _GLIBCXX_DEFAULT_ABI_TAG
#endif
-// Defined if inline namespaces are used for versioning.
+// Non-zero if inline namespaces are used for versioning the entire library.
#define _GLIBCXX_INLINE_VERSION
-// Inline namespace for symbol versioning.
#if _GLIBCXX_INLINE_VERSION
+// Inline namespace for symbol versioning of (nearly) everything in std.
# define _GLIBCXX_BEGIN_NAMESPACE_VERSION namespace __8 {
# define _GLIBCXX_END_NAMESPACE_VERSION }
+// Unused when everything in std is versioned anyway.
+# define _GLIBCXX_BEGIN_INLINE_ABI_NAMESPACE(X)
+# define _GLIBCXX_END_INLINE_ABI_NAMESPACE(X)
namespace std
{
@@ -376,8 +379,12 @@ _GLIBCXX_END_NAMESPACE_VERSION
}
#else
+// Unused.
# define _GLIBCXX_BEGIN_NAMESPACE_VERSION
# define _GLIBCXX_END_NAMESPACE_VERSION
+// Used to version individual components, e.g. std::_V2::error_category.
+# define _GLIBCXX_BEGIN_INLINE_ABI_NAMESPACE(X) inline namespace X {
+# define _GLIBCXX_END_INLINE_ABI_NAMESPACE(X) } // inline namespace X
#endif
// Inline namespaces for special modes: debug, parallel.
diff --git a/libstdc++-v3/include/bits/chrono.h b/libstdc++-v3/include/bits/chrono.h
index 421898516ae..745f9a81357 100644
--- a/libstdc++-v3/include/bits/chrono.h
+++ b/libstdc++-v3/include/bits/chrono.h
@@ -1099,7 +1099,7 @@ _GLIBCXX_BEGIN_NAMESPACE_VERSION
// compatibility definitions for previous versions. At some
// point, when these clocks settle down, the inlined namespaces
// can be removed. XXX GLIBCXX_ABI Deprecated
- inline namespace _V2 {
+_GLIBCXX_BEGIN_INLINE_ABI_NAMESPACE(_V2)
/**
* @brief System clock.
@@ -1171,7 +1171,7 @@ _GLIBCXX_BEGIN_NAMESPACE_VERSION
*/
using high_resolution_clock = system_clock;
- } // end inline namespace _V2
+_GLIBCXX_END_INLINE_ABI_NAMESPACE(_V2)
#if __cplusplus >= 202002L
/// @addtogroup chrono
diff --git a/libstdc++-v3/include/bits/stl_algo.h b/libstdc++-v3/include/bits/stl_algo.h
index 1f07b9e6589..6619ff7bf1d 100644
--- a/libstdc++-v3/include/bits/stl_algo.h
+++ b/libstdc++-v3/include/bits/stl_algo.h
@@ -1190,8 +1190,7 @@ _GLIBCXX_BEGIN_NAMESPACE_VERSION
return __m;
}
- inline namespace _V2
- {
+_GLIBCXX_BEGIN_INLINE_ABI_NAMESPACE(_V2)
/// This is a helper function for the rotate algorithm.
template<typename _ForwardIterator>
@@ -1398,7 +1397,7 @@ _GLIBCXX_BEGIN_NAMESPACE_VERSION
std::__iterator_category(__first));
}
- } // namespace _V2
+_GLIBCXX_END_INLINE_ABI_NAMESPACE(_V2)
/**
* @brief Copy a sequence, rotating its elements.
diff --git a/libstdc++-v3/include/std/condition_variable b/libstdc++-v3/include/std/condition_variable
index 2a23e65bbd3..06c4ff9ebdd 100644
--- a/libstdc++-v3/include/std/condition_variable
+++ b/libstdc++-v3/include/std/condition_variable
@@ -234,7 +234,7 @@ _GLIBCXX_BEGIN_NAMESPACE_VERSION
void (*_M_cb)(void*);
};
- inline namespace _V2 {
+_GLIBCXX_BEGIN_INLINE_ABI_NAMESPACE(_V2)
/// condition_variable_any
// Like above, but mutex is not required to have try_lock.
@@ -439,7 +439,7 @@ _GLIBCXX_BEGIN_NAMESPACE_VERSION
#endif
};
- } // end inline namespace
+_GLIBCXX_END_INLINE_ABI_NAMESPACE(_V2)
/// @} group condition_variables
_GLIBCXX_END_NAMESPACE_VERSION
diff --git a/libstdc++-v3/include/std/system_error b/libstdc++-v3/include/std/system_error
index 45a1d283556..dcef94e16e2 100644
--- a/libstdc++-v3/include/std/system_error
+++ b/libstdc++-v3/include/std/system_error
@@ -77,7 +77,7 @@ _GLIBCXX_BEGIN_NAMESPACE_VERSION
#endif // C++17
/// @}
- inline namespace _V2 {
+_GLIBCXX_BEGIN_INLINE_ABI_NAMESPACE(_V2)
/** @addtogroup diagnostics
* @{
@@ -168,7 +168,8 @@ _GLIBCXX_BEGIN_NAMESPACE_VERSION
_GLIBCXX_CONST const error_category& system_category() noexcept;
/// @}
- } // end inline namespace
+
+_GLIBCXX_END_INLINE_ABI_NAMESPACE(_V2)
/** @addtogroup diagnostics
* @{
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