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author | Joseph Myers <joseph@codesourcery.com> | 2022-09-07 18:39:28 +0000 |
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committer | Joseph Myers <joseph@codesourcery.com> | 2022-09-07 18:39:28 +0000 |
commit | b8cc607f3c1e8371b89158f427a61f28018604a5 (patch) | |
tree | 84d7bcd2b066e677c76ad25ad0c988831f94988e /stdio-common | |
parent | 89d40cacd0aed35e2546513ce01924b879523e46 (diff) | |
download | glibc-b8cc607f3c1e8371b89158f427a61f28018604a5.tar.gz glibc-b8cc607f3c1e8371b89158f427a61f28018604a5.tar.xz glibc-b8cc607f3c1e8371b89158f427a61f28018604a5.zip |
Do not define static_assert or thread_local in headers for C2x
C2x makes static_assert and thread_local into keywords, removing the definitions as macros in assert.h and threads.h. Thus, disable those macros in those glibc headers for C2x. The disabling is done based on a combination of language version and __GNUC_PREREQ, *not* based on __GLIBC_USE (ISOC2X), on the principle that users of the header (when requesting C11 or later APIs - not assert.h for C99 and older API versions) should always have the names static_assert or thread_local available after inclusion of the header, whether as a keyword or as a macro. Thus, when using a compiler without the keywords (whether an older compiler, possibly in C2x mode, or _GNU_SOURCE with any compiler but in an older language mode, for example) the macros should be defined, even when C2x APIs have been requested. The __GNUC_PREREQ conditionals here may well need updating with the versions of other compilers that gained support for these keywords in C2x mode. Tested for x86_64.
Diffstat (limited to 'stdio-common')
0 files changed, 0 insertions, 0 deletions