--- configure.in.old	Wed Apr 17 13:09:08 2002
+++ configure.in	Wed Apr 17 13:09:11 2002
@@ -225,14 +225,9 @@
       AC_MSG_ERROR(not found library: pthread !!!))
 fi
 
-AC_CACHE_CHECK(for tm_gmtoff in struct tm, ac_cv_have_tm_gmtoff,
-	[AC_TRY_COMPILE([#include <time.h>],
-		[struct tm t; t.tm_gmtoff = 0],
-		ac_cv_have_tm_gmtoff=yes,
-		ac_cv_have_tm_gmtoff=no)])
-if test $ac_cv_have_tm_gmtoff = yes; then
-	AC_DEFINE(HAVE_TM_GMTON)
-fi
+AC_CHECK_MEMBER(struct tm.tm_gmtoff,
+		AC_DEFINE(HAVE_TM_GMTON),,
+		[#include <time.h>])
 
 AC_CACHE_CHECK(for timer operations, ac_cv_have_timeops,
 	[AC_TRY_LINK([#include <sys/time.h>],
@@ -269,14 +264,9 @@
 fi
 
 if test $have_termios = "no"; then
-	AC_CACHE_CHECK(for c_ispeed and c_ospeed in struct termios, ac_cv_have_c_iospeed,
-		[AC_TRY_COMPILE([#include <termios.h>],
-			[struct termios t; t.c_iflag = B9600; t.c_oflag = B9600;],
-			ac_cv_have_c_iospeed=yes,
-			ac_cv_have_c_iospeed=yes)])
-	if test ac_cv_have_c_iospeed = yes; then
-		AC_DEFINE(HAVE_TERMIOS_CSPEED)
-	fi
+	AC_CHECK_MEMBERS([struct termios.c_iflag, struct termios.c_oflag],
+			AC_DEFINE(HAVE_TERMIOS_CSPEED),,
+			[#include <termios.h>])
 fi
 
 dnl ======================== Checks for getopt_long support 
@@ -435,11 +425,10 @@
    ]
 )
 
-AC_TRY_COMPILE( [#define _XOPEN_SOURCE 500
+AC_CHECK_MEMBER(struct msg.msg_control,,,
+		[#define _XOPEN_SOURCE 500
 		 #include <sys/types.h>
-		 #include <sys/socket.h>],
-		[struct msghdr msg; msg.msg_control;],
-		AC_DEFINE(HAVE_MSGHDR_MSG_CONTROL)
+		 #include <sys/socket.h>]
 )
 
 dnl ======================== Checks for header files.