Replace custom HAVE_SYSCTLBYNAME define with AC_CHECK_FUNCS call

acconfig.h

@@ -17,9 +17,6 @@
  ***/
 @TOP@
 
-/** define if sysctlbyname() is available */
-#undef HAVE_SYSCTLBYNAME
-
 /** define if catgets() is available */
 #undef HAVE_CATGETS
 

config.h.in

@@ -17,9 +17,6 @@
  *** it does not get installed.
  ***/
 
-/** define if sysctlbyname() is available */
-#undef HAVE_SYSCTLBYNAME
-
 /** define if catgets() is available */
 #undef HAVE_CATGETS
 
@@ -410,6 +407,9 @@
 /* Define to 1 if you have the `sysconf' function. */
 #undef HAVE_SYSCONF
 
+/* Define to 1 if you have the `sysctlbyname' function. */
+#undef HAVE_SYSCTLBYNAME
+
 /* Define to 1 if you have the <sys/capability.h> header file. */
 #undef HAVE_SYS_CAPABILITY_H
 

configure

@@ -13573,12 +13573,6 @@ if test $ac_cv_c_volatile = no; then
 $as_echo "#define volatile /**/" >>confdefs.h
-fi
-
-ac_fn_c_check_func "$LINENO" "sysctlbyname" "ac_cv_func_sysctlbyname"
-if test "x$ac_cv_func_sysctlbyname" = xyes; then :
-  $as_echo "#define HAVE_SYSCTLBYNAME 1" >>confdefs.h
-
 fi
@@ -13624,6 +13618,18 @@ $as_echo "#define FLEXIBLE_ARRAY_MEMBER /**/" >>confdefs.h
   fi
+for ac_func in sysctlbyname
+do :
+  ac_fn_c_check_func "$LINENO" "sysctlbyname" "ac_cv_func_sysctlbyname"
+if test "x$ac_cv_func_sysctlbyname" = xyes; then :
+  cat >>confdefs.h <<_ACEOF
+#define HAVE_SYSCTLBYNAME 1
+_ACEOF
+
+fi
+done
+
+
 #
 # Check for the existence of mmap to enable the fast format zones
 #

configure.in

@@ -458,9 +458,10 @@ AC_CHECK_HEADERS([threads.h],
 AC_C_CONST
 AC_C_INLINE
 AC_C_VOLATILE
-AC_CHECK_FUNC(sysctlbyname, AC_DEFINE(HAVE_SYSCTLBYNAME))
 AC_C_FLEXIBLE_ARRAY_MEMBER
 
+AC_CHECK_FUNCS([sysctlbyname])
+
 #
 # Check for the existence of mmap to enable the fast format zones
 #