glibc/sysdeps/unix/sysv/linux/include/bits/pthread_stack_min-dynamic.h

/* Don't define PTHREAD_STACK_MIN to __sysconf (_SC_THREAD_STACK_MIN)
   for glibc build.  */
#ifdef _ISOMAC
# include <sysdeps/unix/sysv/linux/bits/pthread_stack_min-dynamic.h>
#else
# include <bits/pthread_stack_min.h>
#endif
Reduce <limits.h> pollution due to dynamic PTHREAD_STACK_MIN <limits.h> used to be a header file with no declarations. GCC's libgomp includes it in a #pragma GCC visibility hidden block. Including <unistd.h> from <limits.h> (indirectly) declares everything in <unistd.h> with hidden visibility, resulting in linker failures. This commit avoids C declarations in assembler mode and only declares __sysconf in <limits.h> (and not the entire contents of <unistd.h>). The __sysconf symbol is already part of the ABI. PTHREAD_STACK_MIN is no longer defined for __USE_DYNAMIC_STACK_SIZE && __ASSEMBLER__ because there is no possible definition. Additionally, PTHREAD_STACK_MIN is now defined by <pthread.h> for __USE_MISC because this is what developers expect based on the macro name. It also helps to avoid libgomp linker failures in GCC because libgomp includes <pthread.h> before its visibility hacks. Reviewed-by: Carlos O'Donell <carlos@redhat.com> 2021-07-12 16:43:32 +00:00			`/* Don't define PTHREAD_STACK_MIN to __sysconf (_SC_THREAD_STACK_MIN)`
			`for glibc build. */`
			`#ifdef _ISOMAC`
			`# include <sysdeps/unix/sysv/linux/bits/pthread_stack_min-dynamic.h>`
			`#else`
			`# include <bits/pthread_stack_min.h>`
			`#endif`