Fix __ss_family build issue on AIX6.1 (#592)

Author: EGuesnet

src/libmongoc/CMakeLists.txt

@@ -398,6 +398,13 @@ if (NOT ENABLE_ICU STREQUAL OFF)
    endif()
 endif()
 
+CHECK_STRUCT_HAS_MEMBER("struct sockaddr_storage" ss_family "sys/socket.h" MONGOC_HAVE_SS_FAMILY)
+if (NOT MONGOC_HAVE_SS_FAMILY)
+   set (MONGOC_HAVE_SS_FAMILY 0)
+else ()
+   set (MONGOC_HAVE_SS_FAMILY 1)
+endif ()
+
 configure_file (
    "${PROJECT_SOURCE_DIR}/src/mongoc/mongoc-config.h.in"
    "${PROJECT_BINARY_DIR}/src/mongoc/mongoc-config.h"

src/libmongoc/src/mongoc/mongoc-config.h.in

@@ -370,6 +370,15 @@
 #  undef MONGOC_ENABLE_ICU
 #endif
 
+/*
+ * Set if struct sockaddr_storage has __ss_family (instead of ss_family)
+ */
+
+#define MONGOC_HAVE_SS_FAMILY @MONGOC_HAVE_SS_FAMILY@
+
+#if MONGOC_HAVE_SS_FAMILY != 1
+#  undef MONGOC_HAVE_SS_FAMILY
+#endif
 
 /*
  * NOTICE:

src/libmongoc/src/mongoc/mongoc-socket.h

@@ -38,7 +38,7 @@
 #include <sys/un.h>
 #endif
 
-#if defined(_AIX) && !defined(HAVE_SA_SS_FAMILY)
+#if defined(_AIX) && !defined(MONGOC_HAVE_SS_FAMILY)
 # define ss_family __ss_family
 #endif