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At the last WG14 meeting, <http://www.open-std.org/jtc1/sc22/wg14/www/docs/n2711.htm> was accepted, which places more emphasis on the new fmaximum / fminimum functions and less on the old fmax / fmin functions. Some of the changes are to examples, notes or otherwise don't require implementation changes. However, the changes include removing the _FloatN / _FloatNx versions of the fmax and fmin functions that came from TS 18661-3. Thus, those function versions should only be declared under similar conditions to the _FloatN / _FloatNx versions of fmaxmag and fminmag: for _GNU_SOURCE and pre-C2X use of __STDC_WANT_IEC_60559_TYPES_EXT__, but not for C2X without _GNU_SOURCE. In turn this requires a tgmath.h change so that the corresponding tgmath.h macros, for C2X with __STDC_WANT_IEC_60559_TYPES_EXT__ but without _GNU_SOURCE, don't try to use function variants that aren't declared. (That issue doesn't arise for the tgmath.h macros for fmaxmag and fminmag, because those aren't defined at all in those circumstances unless __STDC_WANT_IEC_60559_BFP_EXT__ (from TS 18661-1 and not specified at all by C2X) is also defined, and in that case the _FloatN / _FloatNx versions of fmaxmag and fminmag get declared - this is only ever an issue when it's possible for some functions corresponding to a type-generic-macro to be declared, and for _FloatN / _FloatNx functions in general to be declared, but without the _FloatN / _FloatNx functions corresponding to that particular macro being declared.) Tested for x86_64. |
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This directory contains the sources of the GNU C Library. See the file "version.h" for what release version you have. The GNU C Library is the standard system C library for all GNU systems, and is an important part of what makes up a GNU system. It provides the system API for all programs written in C and C-compatible languages such as C++ and Objective C; the runtime facilities of other programming languages use the C library to access the underlying operating system. In GNU/Linux systems, the C library works with the Linux kernel to implement the operating system behavior seen by user applications. In GNU/Hurd systems, it works with a microkernel and Hurd servers. The GNU C Library implements much of the POSIX.1 functionality in the GNU/Hurd system, using configurations i[4567]86-*-gnu. When working with Linux kernels, this version of the GNU C Library requires Linux kernel version 3.2 or later. Also note that the shared version of the libgcc_s library must be installed for the pthread library to work correctly. The GNU C Library supports these configurations for using Linux kernels: aarch64*-*-linux-gnu alpha*-*-linux-gnu arc*-*-linux-gnu arm-*-linux-gnueabi csky-*-linux-gnuabiv2 hppa-*-linux-gnu i[4567]86-*-linux-gnu x86_64-*-linux-gnu Can build either x86_64 or x32 ia64-*-linux-gnu m68k-*-linux-gnu microblaze*-*-linux-gnu mips-*-linux-gnu mips64-*-linux-gnu powerpc-*-linux-gnu Hardware or software floating point, BE only. powerpc64*-*-linux-gnu Big-endian and little-endian. s390-*-linux-gnu s390x-*-linux-gnu riscv32-*-linux-gnu riscv64-*-linux-gnu sh[34]-*-linux-gnu sparc*-*-linux-gnu sparc64*-*-linux-gnu If you are interested in doing a port, please contact the glibc maintainers; see https://www.gnu.org/software/libc/ for more information. See the file INSTALL to find out how to configure, build, and install the GNU C Library. You might also consider reading the WWW pages for the C library at https://www.gnu.org/software/libc/. The GNU C Library is (almost) completely documented by the Texinfo manual found in the `manual/' subdirectory. The manual is still being updated and contains some known errors and omissions; we regret that we do not have the resources to work on the manual as much as we would like. For corrections to the manual, please file a bug in the `manual' component, following the bug-reporting instructions below. Please be sure to check the manual in the current development sources to see if your problem has already been corrected. Please see https://www.gnu.org/software/libc/bugs.html for bug reporting information. We are now using the Bugzilla system to track all bug reports. This web page gives detailed information on how to report bugs properly. The GNU C Library is free software. See the file COPYING.LIB for copying conditions, and LICENSES for notices about a few contributions that require these additional notices to be distributed. License copyright years may be listed using range notation, e.g., 1996-2015, indicating that every year in the range, inclusive, is a copyrightable year that would otherwise be listed individually.