2014年8月14日 · That header file is not part of the C++ standard, is therefore non-portable, and should be avoided. Moreover, even if there were some catch-all header in the standard, you would want to avoid it in lieu of specific headers, since the compiler has to actually read in and parse every included header (including recursively included headers) every single time that …

The intended final __STDC_VERSION__ value, 201112L, is also implemented (the editor forgot to update the 201ymmL placeholders before sending the document for publication by ISO). See also DR #411, which makes it official that the intended value is 201112l.

2017年12月18日 · Since a quick Google search did not find anything, I will try to ask here (since many people involved in gcc/clang hang around here) - What is the status of __STDC_LIB_EXT1__ in gcc/clang? We are developing a cross platform application and I wanted to use some of the safe bounds checking functions from <stdio.h> (which by miracle are …

2024年6月5日 · What is the STDC_VERSION value for C11? asks about C11, and How can I use "nullptr" for null pointers prior to C23? says that the current versions of GCC and Clang define it to a placeholder value 202000L. GCC 14 Release Series Changes, New Features, and Fixes has now added the std=c23 flag, but doesn't mention what __STDC_VERSION__ expands to.

2018年7月18日 · In my text book, STDC__VERSION is spelled with two underscores in the middle, and even for one underscore in the middle it does not work as well. – Ahmed Hesham Commented Jul 18, 2018 at 7:16

2024年12月6日 · Get rid of missing -D__STDC_CONSTANT_MACROS in Visual Studio. 1. GCC ignores calling convention attribute. 0.

2015年7月2日 · So __STDC_IEC_559__ is defined by both GCC and Clang (with a glibc header file) which seems to disagree with the answer to the first question I linked to. I then tested musl (e.g. musl-gcc -test.c) which is a different standard library than glibc. This showed that __STDC_IEC_559__ is not defined with musl.

2021年12月30日 · Compilers and implementations of the C Standard Library (such as the GNU C Standard Library) which implemented these extensions usually "hid" them behind macros, such as STDC_WANT_LIB_EXT2 in this case. See Feature Test Macros for more Glibc examples of those special feature macros.

2015年8月23日 · The C++ standard (n3797) includes the C standard library by reference, see s1.2/2. The library described in Clause 7 of ISO/IEC 9899:1999 and Clause 7 of ISO/IEC 9899:1999/Cor.1:2001 and Clause 7 of ISO/IEC 9899:1999/Cor.2:2003 is hereinafter called the C standard library.

-d__stdc_constant_macros -d__stdc_limit_macros For more information about the -D command line option, refer to gcc's documentation on preprocessor options . Share