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32-bit compilers emit, respectively: _f _g@4 @h@4 In the stdcall and fastcall mangling schemes, the function is encoded as _name@X and @name@X respectively, where X is the number of bytes, in decimal, of the argument(s) in the parameter list (including those passed in registers, for fastcall).
GCC and Clang can be made to use a similar calling convention by using __stdcall with the regparm function attribute or the -mregparm=3 switch. (The stack order is inverted.) It is also possible to produce a caller clean-up variant using cdecl or extend this to also use SSE registers. [18]
Clang progressively added partial C++23 support from 2021 in version 13 through to version 18 in 2024, available through the option -std=c++23. [ 142 ] GCC added partial, experimental C++23 support in 2021 in version 11 through the option -std=c++2b or -std=c++23 It also has an option to enable GNU extensions in addition to the experimental C++ ...
Clang becomes default compiler in OpenBSD 6.6 on mips64. [58] 19 September 2019 Clang 9.0.0 released with official RISC-V target support. [59] 29 February 2020 Clang becomes the only C compiler in the FreeBSD base system, with the removal of GCC. [60] 24 March 2020 Clang 10.0.0 released: 2 April 2020: Clang becomes default compiler in OpenBSD 6 ...
The application programming interface (API) function TlsAlloc can be used to obtain an unused TLS slot index; the TLS slot index will then be considered 'used'.. The TlsGetValue and TlsSetValue functions are then used to read and write a memory address to a thread-local variable identified by the TLS slot index.
Allowing attributes for namespaces and enumerators [10] [11] New standard attributes [[ fallthrough ]] , [[ maybe_unused ]] and [[ nodiscard ]] [ 12 ] UTF-8 ( u8 ) character literals [ 10 ] [ 13 ] (UTF-8 string literals have existed since C++11 ; C++17 adds the corresponding character literals for consistency, though as they are restricted to a ...
Attributes can be useful for providing information that, for example, helps the compiler to issue better diagnostics or optimize the generated code. C++11 provides two standard attributes itself: noreturn to specify that a function does not return, and carries_dependency to help optimizing multi-threaded code by indicating that function ...
In the C and C++ programming languages, an inline function is one qualified with the keyword inline; this serves two purposes: . It serves as a compiler directive that suggests (but does not require) that the compiler substitute the body of the function inline by performing inline expansion, i.e. by inserting the function code at the address of each function call, thereby saving the overhead ...