diff --git a/src/tbox/platform/windows/dns.c b/src/tbox/platform/windows/dns.c
index 80c141f0e..9590c77d0 100644
--- a/src/tbox/platform/windows/dns.c
+++ b/src/tbox/platform/windows/dns.c
@@ -33,10 +33,8 @@
  */
 tb_bool_t tb_dns_init_env()
 {
-    // done
-    FIXED_INFO*             info = tb_null;
-    ULONG                   size = 0;
-    tb_size_t               count = 0;
+    FIXED_INFO* info = tb_null;
+    ULONG       size = 0;
     do
     {
         // init func
@@ -66,7 +64,6 @@ tb_bool_t tb_dns_init_env()
 
         // add the first dns address
         tb_dns_server_add(info->DnsServerList.IpAddress.String);
-        count++;
 
         // walk dns address
         IP_ADDR_STRING* addr = info->DnsServerList.Next;
@@ -77,7 +74,6 @@ tb_bool_t tb_dns_init_env()
 
             // add the dns address
             tb_dns_server_add(addr->IpAddress.String);
-            count++;
         }
 
     } while (0);
diff --git a/src/tbox/prefix/compiler.h b/src/tbox/prefix/compiler.h
index 1fbc200d5..c427e512a 100644
--- a/src/tbox/prefix/compiler.h
+++ b/src/tbox/prefix/compiler.h
@@ -126,9 +126,9 @@
 #       error Unknown borland c++ Compiler Version
 #   endif
 
-// gnu c/c++
-#elif defined(__GNUC__)
-#   define TB_COMPILER_IS_GCC
+// gcc or clang
+#elif defined(__GNUC__) || defined(__clang__)
+
 #   if defined(__MINGW32__) || defined(__MINGW64__)
 #       define TB_COMPILER_IS_MINGW
 #   endif
@@ -142,43 +142,23 @@
         defined(TB_COMPILER_ON_MSYS) || defined(TB_COMPILER_ON_CYGWIN)
 #       define TB_COMPILER_LIKE_UNIX
 #   endif
-#   define TB_COMPILER_VERSION_BT(major, minor)     ((__GNUC__ * 100 + __GNUC_MINOR__) > ((major) * 100 + (minor)))
-#   define TB_COMPILER_VERSION_BE(major, minor)     ((__GNUC__ * 100 + __GNUC_MINOR__) >= ((major) * 100 + (minor)))
-#   define TB_COMPILER_VERSION_EQ(major, minor)     ((__GNUC__ * 100 + __GNUC_MINOR__) == ((major) * 100 + (minor)))
-#   define TB_COMPILER_VERSION_LT(major, minor)     ((__GNUC__ * 100 + __GNUC_MINOR__) < ((major) * 100 + (minor)))
-#   define TB_COMPILER_VERSION_LE(major, minor)     ((__GNUC__ * 100 + __GNUC_MINOR__) <= ((major) * 100 + (minor)))
-#   define TB_COMPILER_STRING                       "gnu c/c++"
-#   if  __GNUC__ == 2
-#       if __GNUC_MINOR__ < 95
-#           define TB_COMPILER_VERSION_STRING       "gnu c/c++ <2.95"
-#       elif __GNUC_MINOR__ == 95
-#           define TB_COMPILER_VERSION_STRING       "gnu c/c++ 2.95"
-#       elif __GNUC_MINOR__ == 96
-#           define TB_COMPILER_VERSION_STRING       "gnu c/c++ 2.96"
-#       else
-#           define TB_COMPILER_VERSION_STRING       "gnu c/c++ > 2.96 && < 3.0"
-#       endif
-#   elif __GNUC__ == 3
-#       if __GNUC_MINOR__ == 2
-#           define TB_COMPILER_VERSION_STRING       "gnu c/c++ 3.2"
-#       elif __GNUC_MINOR__ == 3
-#           define TB_COMPILER_VERSION_STRING       "gnu c/c++ 3.3"
-#       elif __GNUC_MINOR__ == 4
-#           define TB_COMPILER_VERSION_STRING       "gnu c/c++ 3.4"
-#       else
-#           define TB_COMPILER_VERSION_STRING       "gnu c/c++ > 3.4 && < 4.0"
-#       endif
-#   elif __GNUC__ >= 4 && defined(__GNUC_MINOR__)
-#       define TB_COMPILER_VERSION_STRING           __tb_mstrcat4__("gnu c/c++ ", __tb_mstring_ex__(__GNUC__), ".", __tb_mstring_ex__(__GNUC_MINOR__))
-#   else
-#       error Unknown gnu c/c++ Compiler Version
+
+#   if defined(__clang__)
+#       define TB_COMPILER_IS_CLANG
 #   endif
 
+    // we always need to be compatible with gcc style code if the current compiler is clang
+#   define TB_COMPILER_IS_GCC
+
     // clang
 #   if defined(__clang__)
-#       define TB_COMPILER_IS_CLANG
 #       undef TB_COMPILER_STRING
 #       define TB_COMPILER_STRING                   "clang c/c++"
+#       define TB_COMPILER_VERSION_BT(major, minor)     ((__clang_major__ * 100 + __clang_minor__) > ((major) * 100 + (minor)))
+#       define TB_COMPILER_VERSION_BE(major, minor)     ((__clang_major__ * 100 + __clang_minor__) >= ((major) * 100 + (minor)))
+#       define TB_COMPILER_VERSION_EQ(major, minor)     ((__clang_major__ * 100 + __clang_minor__) == ((major) * 100 + (minor)))
+#       define TB_COMPILER_VERSION_LT(major, minor)     ((__clang_major__ * 100 + __clang_minor__) < ((major) * 100 + (minor)))
+#       define TB_COMPILER_VERSION_LE(major, minor)     ((__clang_major__ * 100 + __clang_minor__) <= ((major) * 100 + (minor)))
 #       if defined(__VERSION__)
 #           undef TB_COMPILER_VERSION_STRING
 #           define TB_COMPILER_VERSION_STRING       __VERSION__
@@ -204,6 +184,40 @@
          * pointer is missing a nullability type specifier (_Nonnull, _Nullable, or _Null_unspecified)
          */
 #       pragma clang diagnostic ignored             "-Wnullability-completeness"
+
+    // gcc
+#   elif defined(__GNUC__)
+#       define TB_COMPILER_VERSION_BT(major, minor)     ((__GNUC__ * 100 + __GNUC_MINOR__) > ((major) * 100 + (minor)))
+#       define TB_COMPILER_VERSION_BE(major, minor)     ((__GNUC__ * 100 + __GNUC_MINOR__) >= ((major) * 100 + (minor)))
+#       define TB_COMPILER_VERSION_EQ(major, minor)     ((__GNUC__ * 100 + __GNUC_MINOR__) == ((major) * 100 + (minor)))
+#       define TB_COMPILER_VERSION_LT(major, minor)     ((__GNUC__ * 100 + __GNUC_MINOR__) < ((major) * 100 + (minor)))
+#       define TB_COMPILER_VERSION_LE(major, minor)     ((__GNUC__ * 100 + __GNUC_MINOR__) <= ((major) * 100 + (minor)))
+#       define TB_COMPILER_STRING                       "gnu c/c++"
+#       if  __GNUC__ == 2
+#           if __GNUC_MINOR__ < 95
+#               define TB_COMPILER_VERSION_STRING       "gnu c/c++ <2.95"
+#           elif __GNUC_MINOR__ == 95
+#               define TB_COMPILER_VERSION_STRING       "gnu c/c++ 2.95"
+#           elif __GNUC_MINOR__ == 96
+#               define TB_COMPILER_VERSION_STRING       "gnu c/c++ 2.96"
+#           else
+#               define TB_COMPILER_VERSION_STRING       "gnu c/c++ > 2.96 && < 3.0"
+#           endif
+#       elif __GNUC__ == 3
+#           if __GNUC_MINOR__ == 2
+#               define TB_COMPILER_VERSION_STRING       "gnu c/c++ 3.2"
+#           elif __GNUC_MINOR__ == 3
+#               define TB_COMPILER_VERSION_STRING       "gnu c/c++ 3.3"
+#           elif __GNUC_MINOR__ == 4
+#               define TB_COMPILER_VERSION_STRING       "gnu c/c++ 3.4"
+#           else
+#               define TB_COMPILER_VERSION_STRING       "gnu c/c++ > 3.4 && < 4.0"
+#           endif
+#       elif __GNUC__ >= 4 && defined(__GNUC_MINOR__)
+#           define TB_COMPILER_VERSION_STRING           __tb_mstrcat4__("gnu c/c++ ", __tb_mstring_ex__(__GNUC__), ".", __tb_mstring_ex__(__GNUC_MINOR__))
+#       else
+#           error Unknown gnu c/c++ Compiler Version
+#       endif
 #   endif
 
 // watcom c/c++
diff --git a/src/xmake.sh b/src/xmake.sh
index 6d72c1270..4234925d9 100755
--- a/src/xmake.sh
+++ b/src/xmake.sh
@@ -248,7 +248,7 @@ check_interfaces() {
     check_module_cfuncs "posix" "dlfcn.h"                          "dlopen"
     check_module_cfuncs "posix" "sys/stat.h fcntl.h"               "open" "stat64" "lstat64"
     check_module_cfuncs "posix" "unistd.h"                         "gethostname"
-    check_module_cfuncs "posix" "ifaddrs.h"                        "getifaddrs"
+    check_module_cfuncs "posix" "ifaddrs.h net/if_dl.h"            "getifaddrs"
     check_module_cfuncs "posix" "semaphore.h"                      "sem_init"
     check_module_cfuncs "posix" "unistd.h"                         "getpagesize" "sysconf"
     check_module_cfuncs "posix" "sched.h"                          "sched_yield" "sched_setaffinity" # need _GNU_SOURCE
diff --git a/xmake/check_interfaces.lua b/xmake/check_interfaces.lua
index c906e234d..ee4c4c51d 100644
--- a/xmake/check_interfaces.lua
+++ b/xmake/check_interfaces.lua
@@ -183,7 +183,7 @@ function _check_interfaces(target)
         _check_module_cfuncs(target, "posix", "dlfcn.h",                          "dlopen")
         _check_module_cfuncs(target, "posix", {"sys/stat.h", "fcntl.h"},          "open", "stat64", "lstat64")
         _check_module_cfuncs(target, "posix", "unistd.h",                         "gethostname")
-        _check_module_cfuncs(target, "posix", "ifaddrs.h",                        "getifaddrs")
+        _check_module_cfuncs(target, "posix", {"ifaddrs.h", "net/if_dl.h"},       "getifaddrs")
         _check_module_cfuncs(target, "posix", "unistd.h",                         "getpagesize", "sysconf")
         _check_module_cfuncs(target, "posix", "sched.h",                          "sched_yield", "sched_setaffinity") -- need _GNU_SOURCE
         _check_module_cfuncs(target, "posix", "regex.h",                          "regcomp", "regexec")