1/* The compat versions for the dynamic pthread_atfork provided by libpthread,
2 before supported __dso_handle was added. */
3#define PTHREAD_ATFORK_COMPAT_INTRODUCED GLIBC_2_0
4#define PTHREAD_ATFORK_COMPAT_OBSOLETED GLIBC_2_3
5

source code of glibc/sysdeps/nptl/pthread_atfork_compat.h