From efbcd517fc9ec1ef5a6dfe85cb79bf0a57b954c5 Mon Sep 17 00:00:00 2001
From: Max Romanov <max.romanov@nginx.com>
Date: Tue, 17 Mar 2020 14:44:06 +0300
Subject: [PATCH] Checking sendfile() availability in configure.

Removing SF_NODISKIO flag for FreeBSD sendfile() check because it
is not used yet and to support DragonFlyBSD.

This closes #414 issue on GitHub.
---
 auto/sendfile | 64 +++++++++++++++++++++++++++++----------------------
 1 file changed, 36 insertions(+), 28 deletions(-)

diff --git a/auto/sendfile b/auto/sendfile
index e5bf3b79..a065f7b6 100644
--- a/auto/sendfile
+++ b/auto/sendfile
@@ -46,7 +46,7 @@ if [ $nxt_found = no ]; then
                       int main() {
                           off_t  sent;
 
-                          sendfile(-1, -1, 0, 0, NULL, &sent, SF_NODISKIO);
+                          sendfile(-1, -1, 0, 0, NULL, &sent, 0);
                           return 0;
                       }"
     . auto/feature
@@ -57,33 +57,6 @@ if [ $nxt_found = no ]; then
 fi
 
 
-NXT_LIBSENDFILE=
-
-if [ $nxt_found = no ]; then
-
-    # Solaris 8 sendfilev().
-
-    nxt_feature="Solaris sendfilev()"
-    nxt_feature_name=NXT_HAVE_SOLARIS_SENDFILEV
-    nxt_feature_libs="-lsendfile"
-    nxt_feature_test="#include <sys/sendfile.h>
-
-                      int main() {
-                          size_t              sent;
-                          struct sendfilevec  vec;
-
-                          sendfilev(-1, &vec, 0, &sent);
-                          return 0;
-                      }"
-    . auto/feature
-
-    if [ $nxt_found = yes ]; then
-        NXT_HAVE_SOLARIS_SENDFILEV=YES
-        NXT_LIBSENDFILE=$nxt_feature_libs
-    fi
-fi
-
-
 if [ $nxt_found = no ]; then
 
     # MacOSX sendfile().
@@ -110,6 +83,41 @@ if [ $nxt_found = no ]; then
 fi
 
 
+if [ $nxt_found = no ]; then
+    $echo
+    $echo "$0: error: no supported sendfile() found."
+    $echo
+    exit 1;
+fi
+
+
+NXT_LIBSENDFILE=
+
+if [ $nxt_found = no ]; then
+
+    # Solaris 8 sendfilev().
+
+    nxt_feature="Solaris sendfilev()"
+    nxt_feature_name=NXT_HAVE_SOLARIS_SENDFILEV
+    nxt_feature_libs="-lsendfile"
+    nxt_feature_test="#include <sys/sendfile.h>
+
+                      int main() {
+                          size_t              sent;
+                          struct sendfilevec  vec;
+
+                          sendfilev(-1, &vec, 0, &sent);
+                          return 0;
+                      }"
+    . auto/feature
+
+    if [ $nxt_found = yes ]; then
+        NXT_HAVE_SOLARIS_SENDFILEV=YES
+        NXT_LIBSENDFILE=$nxt_feature_libs
+    fi
+fi
+
+
 if [ $nxt_found = no ]; then
 
     # AIX send_file().