From: "Arsen Arsenović" <arsen@aarsen.me>
To: gcc-patches@gcc.gnu.org
Cc: libstdc++@gcc.gnu.org, "Arsen Arsenović" <arsen@aarsen.me>
Subject: [PATCH] libstdc++: Make placeholders inline when inline variables are available
Date: Thu, 20 Oct 2022 16:58:53 +0200 [thread overview]
Message-ID: <20221020145849.2459976-1-arsen@aarsen.me> (raw)
This slightly lowers the dependency of generated code on libstdc++.so.
libstdc++-v3/ChangeLog:
* include/std/functional: Make placeholders inline, if possible.
---
libstdc++-v3/include/std/functional | 66 ++++++++++++++++-------------
1 file changed, 37 insertions(+), 29 deletions(-)
diff --git a/libstdc++-v3/include/std/functional b/libstdc++-v3/include/std/functional
index d22acaa3cb8..b396e8dbbdc 100644
--- a/libstdc++-v3/include/std/functional
+++ b/libstdc++-v3/include/std/functional
@@ -285,35 +285,43 @@ _GLIBCXX_BEGIN_NAMESPACE_VERSION
* simplify this with variadic templates, because we're introducing
* unique names for each.
*/
- extern const _Placeholder<1> _1;
- extern const _Placeholder<2> _2;
- extern const _Placeholder<3> _3;
- extern const _Placeholder<4> _4;
- extern const _Placeholder<5> _5;
- extern const _Placeholder<6> _6;
- extern const _Placeholder<7> _7;
- extern const _Placeholder<8> _8;
- extern const _Placeholder<9> _9;
- extern const _Placeholder<10> _10;
- extern const _Placeholder<11> _11;
- extern const _Placeholder<12> _12;
- extern const _Placeholder<13> _13;
- extern const _Placeholder<14> _14;
- extern const _Placeholder<15> _15;
- extern const _Placeholder<16> _16;
- extern const _Placeholder<17> _17;
- extern const _Placeholder<18> _18;
- extern const _Placeholder<19> _19;
- extern const _Placeholder<20> _20;
- extern const _Placeholder<21> _21;
- extern const _Placeholder<22> _22;
- extern const _Placeholder<23> _23;
- extern const _Placeholder<24> _24;
- extern const _Placeholder<25> _25;
- extern const _Placeholder<26> _26;
- extern const _Placeholder<27> _27;
- extern const _Placeholder<28> _28;
- extern const _Placeholder<29> _29;
+#if __cpp_inline_variables
+# define _GLIBCXX_PLACEHOLDER inline
+#else
+# define _GLIBCXX_PLACEHOLDER extern
+#endif
+
+ _GLIBCXX_PLACEHOLDER const _Placeholder<1> _1;
+ _GLIBCXX_PLACEHOLDER const _Placeholder<2> _2;
+ _GLIBCXX_PLACEHOLDER const _Placeholder<3> _3;
+ _GLIBCXX_PLACEHOLDER const _Placeholder<4> _4;
+ _GLIBCXX_PLACEHOLDER const _Placeholder<5> _5;
+ _GLIBCXX_PLACEHOLDER const _Placeholder<6> _6;
+ _GLIBCXX_PLACEHOLDER const _Placeholder<7> _7;
+ _GLIBCXX_PLACEHOLDER const _Placeholder<8> _8;
+ _GLIBCXX_PLACEHOLDER const _Placeholder<9> _9;
+ _GLIBCXX_PLACEHOLDER const _Placeholder<10> _10;
+ _GLIBCXX_PLACEHOLDER const _Placeholder<11> _11;
+ _GLIBCXX_PLACEHOLDER const _Placeholder<12> _12;
+ _GLIBCXX_PLACEHOLDER const _Placeholder<13> _13;
+ _GLIBCXX_PLACEHOLDER const _Placeholder<14> _14;
+ _GLIBCXX_PLACEHOLDER const _Placeholder<15> _15;
+ _GLIBCXX_PLACEHOLDER const _Placeholder<16> _16;
+ _GLIBCXX_PLACEHOLDER const _Placeholder<17> _17;
+ _GLIBCXX_PLACEHOLDER const _Placeholder<18> _18;
+ _GLIBCXX_PLACEHOLDER const _Placeholder<19> _19;
+ _GLIBCXX_PLACEHOLDER const _Placeholder<20> _20;
+ _GLIBCXX_PLACEHOLDER const _Placeholder<21> _21;
+ _GLIBCXX_PLACEHOLDER const _Placeholder<22> _22;
+ _GLIBCXX_PLACEHOLDER const _Placeholder<23> _23;
+ _GLIBCXX_PLACEHOLDER const _Placeholder<24> _24;
+ _GLIBCXX_PLACEHOLDER const _Placeholder<25> _25;
+ _GLIBCXX_PLACEHOLDER const _Placeholder<26> _26;
+ _GLIBCXX_PLACEHOLDER const _Placeholder<27> _27;
+ _GLIBCXX_PLACEHOLDER const _Placeholder<28> _28;
+ _GLIBCXX_PLACEHOLDER const _Placeholder<29> _29;
+
+#undef _GLIBCXX_PLACEHOLDER
}
/**
--
2.38.1
next reply other threads:[~2022-10-20 15:04 UTC|newest]
Thread overview: 2+ messages / expand[flat|nested] mbox.gz Atom feed top
2022-10-20 14:58 Arsen Arsenović [this message]
2022-10-28 14:56 ` Jonathan Wakely
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