From d67d6b4f981db9612d808bd723176a1d2996d53a Mon Sep 17 00:00:00 2001
From: Alexander Kanavin <alex@linutronix.de>
Date: Mon, 17 Jan 2022 13:21:32 +0100
Subject: [PATCH] configure.ac: check getprotobynumber_r with AC_TRY_LINK

AC_TRY_COMPILE won't error out if the function is altogether absent
(e.g. on linux musl C library), the test needs to link all the way.

Upstream-Status: Submitted [via email to socat@dest-unreach.org]
Signed-off-by: Alexander Kanavin <alex@linutronix.de>
---
 configure.ac | 6 +++---
 1 file changed, 3 insertions(+), 3 deletions(-)

diff --git a/configure.ac b/configure.ac
index d4acc9e..973a7f2 100644
--- a/configure.ac
+++ b/configure.ac
@@ -137,13 +137,13 @@ AC_MSG_RESULT($sc_cv_have_prototype_hstrerror)
 # getprotobynumber_r() is not standardized
 AC_MSG_CHECKING(for getprotobynumber_r() variant)
 AC_CACHE_VAL(sc_cv_getprotobynumber_r,
-[AC_TRY_COMPILE([#include <stddef.h>
+[AC_TRY_LINK([#include <stddef.h>
 #include <netdb.h>],[getprotobynumber_r(1,NULL,NULL,1024,NULL);],
 [sc_cv_getprotobynumber_r=1; tmp_bynum_variant=Linux],
- [AC_TRY_COMPILE([#include <stddef.h>
+ [AC_TRY_LINK([#include <stddef.h>
  #include <netdb.h>],[getprotobynumber_r(1,NULL,NULL,1024);],
  [sc_cv_getprotobynumber_r=2; tmp_bynum_variant=Solaris],
-  [AC_TRY_COMPILE([#include <stddef.h>
+  [AC_TRY_LINK([#include <stddef.h>
   #include <netdb.h>],[getprotobynumber_r(1,NULL,NULL);],
   [sc_cv_getprotobynumber_r=3; tmp_bynum_variant=AIX],