Update buildsys to detect posix_fadvise()

config.h.in

@@ -12,6 +12,9 @@
 /* Define to 1 if you have the <bits/signum.h> header file. */
 #undef HAVE_BITS_SIGNUM_H
 
+/* Define to 1 if you have the <fcntl.h> header file. */
+#undef HAVE_FCNTL_H
+
 /* Uses the GNU gcc compiler */
 #undef HAVE_GCC
 
@@ -48,6 +51,9 @@
 /* Define to 1 if you have the <openssl/sha.h> header file. */
 #undef HAVE_OPENSSL_SHA_H
 
+/* Define to 1 if you have the `posix_fadvise' function. */
+#undef HAVE_POSIX_FADVISE
+
 /* Define to 1 if you have the <signum.h> header file. */
 #undef HAVE_SIGNUM_H
 

configure

@@ -5864,6 +5864,29 @@ fi
 done
 
 
+for ac_header in fcntl.h
+do :
+  ac_fn_c_check_header_mongrel "$LINENO" "fcntl.h" "ac_cv_header_fcntl_h" "$ac_includes_default"
+if test "x$ac_cv_header_fcntl_h" = xyes; then :
+  cat >>confdefs.h <<_ACEOF
+#define HAVE_FCNTL_H 1
+_ACEOF
+ for ac_func in posix_fadvise
+do :
+  ac_fn_c_check_func "$LINENO" "posix_fadvise" "ac_cv_func_posix_fadvise"
+if test "x$ac_cv_func_posix_fadvise" = xyes; then :
+  cat >>confdefs.h <<_ACEOF
+#define HAVE_POSIX_FADVISE 1
+_ACEOF
+
+fi
+done
+
+fi
+
+done
+
+
 
 { $as_echo "$as_me:${as_lineno-$LINENO}: checking for socket in -lc" >&5
 $as_echo_n "checking for socket in -lc... " >&6; }

configure.in

@@ -106,6 +106,9 @@ dnl #############################
 AC_CHECK_FUNCS(strftime gethostname gethostid)
 AC_CHECK_FUNCS(mkstemp mktemp, break)
 
+dnl check for posix_fadvise
+AC_CHECK_HEADERS(fcntl.h, [AC_CHECK_FUNCS(posix_fadvise)])
+
 dnl ##############################################
 dnl Checks for various platform specific libraries
 dnl ##############################################