diff options
| -rw-r--r-- | third_party/cares/config_linux/ares_config.h | 28 |
1 files changed, 28 insertions, 0 deletions
diff --git a/third_party/cares/config_linux/ares_config.h b/third_party/cares/config_linux/ares_config.h index 5be5010ed7..8c1b954327 100644 --- a/third_party/cares/config_linux/ares_config.h +++ b/third_party/cares/config_linux/ares_config.h @@ -511,6 +511,34 @@ # define _DARWIN_USE_64_BIT_INODE 1 #endif +#ifdef GPR_BACKWARDS_COMPATIBILITY_MODE + /* Redefine the fd_set macros for GLIBC < 2.15 support. + * This is a backwards compatibility hack. At version 2.15, GLIBC introduces + * the __fdelt_chk function, and starts using it within its fd_set macros + * (which c-ares uses). For compatibility with GLIBC < 2.15, we need to redefine + * the fd_set macros to not use __fdelt_chk. */ + #include <sys/select.h> + #undef FD_SET + #undef FD_CLR + #undef FD_ISSET + /* 'FD_ZERO' doesn't use __fdelt_chk, no need to redefine. */ + + #ifdef __FDS_BITS + #define GRPC_CARES_FDS_BITS(set) __FDS_BITS(set) + #else + #define GRPC_CARES_FDS_BITS(set) ((set)->fds_bits) + #endif + + #define GRPC_CARES_FD_MASK(d) ((long int)(1UL << (d) % NFDBITS)) + + #define FD_SET(d, set) \ + ((void) (GRPC_CARES_FDS_BITS (set)[ (d) / NFDBITS ] |= GRPC_CARES_FD_MASK(d))) + #define FD_CLR(d, set) \ + ((void) (GRPC_CARES_FDS_BITS (set)[ (d) / NFDBITS ] &= ~GRPC_CARES_FD_MASK(d))) + #define FD_ISSET(d, set) \ + ((GRPC_CARES_FDS_BITS (set)[ (d) / NFDBITS ] & GRPC_CARES_FD_MASK(d)) != 0) +#endif /* GPR_BACKWARDS_COMPATIBILITY_MODE */ + /* Number of bits in a file offset, on hosts where this is settable. */ /* #undef _FILE_OFFSET_BITS */ |