File 0903-erts-Fix-check-for-inet_pton-on-windows.patch of Package erlang

From 069cfb12db78c99dd2e647b5442cce05d2c34b43 Mon Sep 17 00:00:00 2001
From: Lukas Larsson <lukas@erlang.org>
Date: Tue, 16 Mar 2021 10:30:37 +0100
Subject: [PATCH 2/2] erts: Fix check for inet_pton on windows

On windows 32-bit the include file ws2tcpip has a define
that renames the inet_pton function to something different
which means that we need to include that file and also
call it with the  correct arguments.
---
 erts/configure.in | 23 +++++++++++++++++++++--
 1 file changed, 21 insertions(+), 2 deletions(-)

diff --git a/erts/configure.in b/erts/configure.in
index 94297df77e..1b54c39ddc 100644
--- a/erts/configure.in
+++ b/erts/configure.in
@@ -2151,14 +2151,33 @@ AC_CHECK_FUNCS([getipnodebyname getipnodebyaddr gethostbyname2])
 
 AC_CHECK_FUNCS([ieee_handler fpsetmask finite isnan isinf res_gethostbyname dlopen \
 		pread pwrite memmove strerror strerror_r strncasecmp \
-		gethrtime localtime_r gmtime_r inet_pton mprotect madvise posix_madvise \
+		gethrtime localtime_r gmtime_r mprotect madvise posix_madvise \
 		mmap mremap memcpy mallopt sbrk _sbrk __sbrk brk _brk __brk \
 		flockfile fstat strlcpy strlcat setsid posix2time time2posix \
 		setlocale nl_langinfo poll mlockall ppoll vsyslog])
 
+## We have a special check for inet_pton as AC_CHECK_FUCNS does not work
+## on windows 32-bit as there a macro is used to rename the symbol...
+AC_MSG_CHECKING([for inet_pton])
+AC_TRY_LINK([
+#ifdef WIN32
+#include <ws2tcpip.h>
+#else
+#include <arpa/inet.h>
+#endif
+],[inet_pton(2,"",(void*)0)], have_inet_pton=yes, have_inet_pton=no)
+
+if test $have_inet_pton = yes; then
+    AC_DEFINE(HAVE_INET_PTON,[1],
+              [Define to 1 if you have the `inet_pton' function.])
+    AC_MSG_RESULT(yes)
+else
+    AC_MSG_RESULT(no)
+fi
+
 AC_MSG_CHECKING([for isfinite])
 AC_TRY_LINK([#include <math.h>],
-            [isfinite(0);], have_isfinite=yes, have_isfinite=no),
+            [isfinite(0);], have_isfinite=yes, have_isfinite=no)
 
 if test $have_isfinite = yes; then
     AC_DEFINE(HAVE_ISFINITE,[1],
-- 
2.26.2