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From: Jonathan Wakely <redi@gcc.gnu.org> To: gcc-cvs@gcc.gnu.org, libstdc++-cvs@gcc.gnu.org Subject: [gcc r13-3553] libstdc++: Make placeholders inline when inline variables are available Date: Fri, 28 Oct 2022 23:56:03 +0000 (GMT) [thread overview] Message-ID: <20221028235603.B6C4A385829F@sourceware.org> (raw) https://gcc.gnu.org/g:b80f25a3360b6850662eaea2039b255fbfbeea31 commit r13-3553-gb80f25a3360b6850662eaea2039b255fbfbeea31 Author: Arsen Arsenović <arsen@aarsen.me> Date: Thu Oct 20 16:58:53 2022 +0200 libstdc++: Make placeholders inline when inline variables are available This slightly lowers the dependency of generated code on libstdc++.so. libstdc++-v3/ChangeLog: * include/std/functional: Make placeholders inline, if possible. Diff: --- 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 } /**
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