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glibc: version-gate _DYNAMIC_STACK_SIZE_SOURCE

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This is a patch to glibc features.h which makes
_DYNAMIC_STACK_SIZE_SOURCE undefined unless the version is >= 2.34.

This feature was introduced with glibc 2.34 and without this patch, code
built against these headers but then run on an older glibc will end up
making a call to sysconf() that returns -1 for the value of SIGSTKSZ
and MINSIGSTKSZ.

Closes #10713
This commit is contained in:
Andrew Kelley 2022-01-28 18:31:23 -07:00
parent cd5b25c5ae
commit 39083c31a5
1 changed files with 5 additions and 1 deletions
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6
lib/libc/include/generic-glibc/features.h vendored
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@ -220,8 +220,12 @@
# define _DEFAULT_SOURCE 1
# undef _ATFILE_SOURCE
# define _ATFILE_SOURCE 1
# if (__GLIBC__ == 2 && __GLIBC_MINOR__ >= 34) || __GLIBC__ > 2
# undef _DYNAMIC_STACK_SIZE_SOURCE
# define _DYNAMIC_STACK_SIZE_SOURCE 1
# endif
#endif
/* If nothing (other than _GNU_SOURCE and _DEFAULT_SOURCE) is defined,
@ -512,4 +516,4 @@
#include <gnu/stubs.h>
#endif /* features.h */
#endif /* features.h */