From 068f37c100e105fd8edcae07762613e8e33c5282 Mon Sep 17 00:00:00 2001
From: Fabrice Fontaine <fontaine.fabrice@gmail.com>
Date: Tue, 18 Aug 2020 20:26:58 +0200
Subject: [PATCH] configure.ac: add AC_USE_SYSTEM_EXTENSIONS

uint and alphasort come from glibc, and with ancient versions thereof,
they were guarded behind different sets of feature-test macros (see
manpage for scandir() for example), which were not default back then.

In file included from iprdump.c:17:0:
iprlib.h:1866:2: error: unknown type name 'uint'
  uint supported_with_min_ucode_level;
  ^

iprlib.c: In function 'ipr_get_pci_slots':
iprlib.c:1999:48: error: 'alphasort' undeclared (first use in this function)
  num_slots = scandir(rootslot, &slotdir, NULL, alphasort);
                                                ^

Fix them by adding AC_USE_SYSTEM_EXTENSIONS in configure.ac

Fixes:
 - http://autobuild.buildroot.org/results/41fde4aa06f7c025bb05aa594716643b9010358f

[Upstream status: https://github.com/bjking1/iprutils/pull/4]
Signed-off-by: Fabrice Fontaine <fontaine.fabrice@gmail.com>
[yann.morin.1998@free.fr: issue is with glibc, not gcc]
Signed-off-by: Yann E. MORIN <yann.morin.1998@free.fr>
---
 configure.ac | 1 +
 1 file changed, 1 insertion(+)

diff --git a/configure.ac b/configure.ac
index 462a8b5..7f5fa7d 100644
--- a/configure.ac
+++ b/configure.ac
@@ -14,6 +14,7 @@ AC_INIT([iprutils], [2.4.19.1], [iprdd-devel@lists.sourceforge.net])
 
 AM_INIT_AUTOMAKE([1.9 foreign])
 AC_CONFIG_MACRO_DIR([build-aux])
+AC_USE_SYSTEM_EXTENSIONS
 
 # Checks for programs.
 AC_PROG_CC
-- 
2.27.0