From 2c0888f69c247c82fc02ba207aa19fa00acf4b5e Mon Sep 17 00:00:00 2001
From: Alejandro Colomar <alx.manpages@gmail.com>
Date: Sun, 19 Jun 2022 12:48:01 +0200
Subject: [PATCH] Including <mntent.h> iff it exists.

With NXT_HAVE_PIVOT_ROOT, we had issues in MacOS.  Headers should
normally be included unconditionally, except of course if they
don't exist.

This fixes part of the #737 issue on GitHub.
---
 auto/isolation      | 13 +++++++++++++
 src/nxt_isolation.c |  2 +-
 2 files changed, 14 insertions(+), 1 deletion(-)

diff --git a/auto/isolation b/auto/isolation
index 4ade6a38..6debdc3b 100644
--- a/auto/isolation
+++ b/auto/isolation
@@ -73,6 +73,19 @@ nxt_feature_test="#include <sys/syscall.h>
 . auto/feature
 
 
+nxt_feature="<mntent.h>"
+nxt_feature_name=NXT_HAVE_MNTENT_H
+nxt_feature_run=no
+nxt_feature_incs=
+nxt_feature_libs=
+nxt_feature_test="#include <mntent.h>
+
+                  int main(void) {
+                      return 0;
+                  }"
+. auto/feature
+
+
 nxt_feature="prctl(PR_SET_NO_NEW_PRIVS)"
 nxt_feature_name=NXT_HAVE_PR_SET_NO_NEW_PRIVS0
 nxt_feature_run=no
diff --git a/src/nxt_isolation.c b/src/nxt_isolation.c
index 7bb8dbfd..5a0714ff 100644
--- a/src/nxt_isolation.c
+++ b/src/nxt_isolation.c
@@ -7,7 +7,7 @@
 #include <nxt_process.h>
 #include <nxt_isolation.h>
 
-#if (NXT_HAVE_PIVOT_ROOT)
+#if (NXT_HAVE_MNTENT_H)
 #include <mntent.h>
 #endif