From 8699aa501c4d4e1567ebe8901e5ec80cadaa9323 Mon Sep 17 00:00:00 2001
From: Felix Yan <felixonmars@archlinux.org>
Date: Thu, 12 Aug 2021 02:44:43 +0800
Subject: [PATCH] deps: fix building with system c-ares on Linux

The change in #39724 breaks building with system c-ares
(`--shared-cares`):
```
In file included from ../src/cares_wrap.cc:25:
../src/cares_wrap.h:25:11: fatal error: ares_nameser.h: No such file or
directory
   25 | # include <ares_nameser.h>
      |           ^~~~~~~~~~~~~~~~
```

Since `ares_nameser.h` isn't available with a default system c-ares
installation, let's add back the include check and use the old
`arpa/nameser.h` routine instead.

Tested to build fine on Arch Linux with shared c-ares.
---
 src/cares_wrap.h | 8 ++++++++
 1 file changed, 8 insertions(+)

diff --git a/src/cares_wrap.h b/src/cares_wrap.h
index 60f99e65edf3..d5575ac64db4 100644
--- a/src/cares_wrap.h
+++ b/src/cares_wrap.h
@@ -22,7 +22,15 @@
 # include <netdb.h>
 #endif  // __POSIX__
 
+#if defined(__ANDROID__) || \
+    defined(__MINGW32__) || \
+    defined(__OpenBSD__) || \
+    defined(_MSC_VER)
+
 # include <ares_nameser.h>
+#else
+# include <arpa/nameser.h>
+#endif
 
 namespace node {
 namespace cares_wrap {