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include (CheckSymbolExists)
if (ENABLE_SRV STREQUAL ON OR ENABLE_SRV STREQUAL AUTO)
if (WIN32)
set (RESOLV_LIBRARIES Dnsapi)
set (MONGOC_HAVE_DNSAPI 1)
set (MONGOC_HAVE_RES_NSEARCH 0)
set (MONGOC_HAVE_RES_NDESTROY 0)
set (MONGOC_HAVE_RES_NCLOSE 0)
set (MONGOC_HAVE_RES_SEARCH 0)
else ()
set (MONGOC_HAVE_DNSAPI 0)
# Thread-safe DNS query function for _mongoc_client_get_srv.
# Could be a macro, not a function, so use check_symbol_exists.
check_symbol_exists (res_nsearch resolv.h MONGOC_HAVE_RES_NSEARCH)
if (MONGOC_HAVE_RES_NSEARCH)
set (RESOLV_LIBRARIES resolv)
set (MONGOC_HAVE_RES_SEARCH 0)
# We have res_nsearch. Call res_ndestroy (BSD/Mac) or res_nclose (Linux)?
check_symbol_exists (res_ndestroy resolv.h MONGOC_HAVE_RES_NDESTROY)
if (MONGOC_HAVE_RES_NDESTROY)
set (MONGOC_HAVE_RES_NCLOSE 0)
else ()
set (MONGOC_HAVE_RES_NDESTROY 0)
check_symbol_exists (res_nclose resolv.h MONGOC_HAVE_RES_NCLOSE)
if (NOT MONGOC_HAVE_RES_NCLOSE)
set (MONGOC_HAVE_RES_NCLOSE 0)
endif ()
endif ()
else ()
set (MONGOC_HAVE_RES_NSEARCH 0)
set (MONGOC_HAVE_RES_NDESTROY 0)
set (MONGOC_HAVE_RES_NCLOSE 0)
# Thread-unsafe function.
check_symbol_exists (res_search resolv.h MONGOC_HAVE_RES_SEARCH)
if (MONGOC_HAVE_RES_SEARCH)
set (RESOLV_LIBRARIES resolv)
else ()
set (MONGOC_HAVE_RES_SEARCH 0)
endif ()
endif ()
endif ()
else ()
# ENABLE_SRV disabled, set default values for defines.
set (MONGOC_HAVE_DNSAPI 0)
set (MONGOC_HAVE_RES_NSEARCH 0)
set (MONGOC_HAVE_RES_NDESTROY 0)
set (MONGOC_HAVE_RES_NCLOSE 0)
set (MONGOC_HAVE_RES_SEARCH 0)
endif ()
if (ENABLE_SRV STREQUAL ON AND NOT RESOLV_LIBRARIES)
message (
FATAL_ERROR
"Cannot find libresolv or dnsapi. Try setting ENABLE_SRV=OFF")
endif ()
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