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Upstream-Status: Backport
Signed-off-by: Ross Burton <ross.burton@intel.com>

From 235d9c5e8381518b0a8661786e7e0cbdd1bbcd01 Mon Sep 17 00:00:00 2001
From: Ross Burton <ross.burton@intel.com>
Date: Tue, 12 Jun 2018 13:24:34 +0100
Subject: [PATCH] ld10k1: define _GNU_SOURCE and use sighandler_t

__sighandler_t is a glibc internal type which doesn't exist in musl.  By using
AC_USE_SYSTEM_EXTENSIONS to get _GNU_SOURCE defined, both glibc and musl
then expose sighandler_t.

Signed-off-by: Ross Burton <ross.burton@intel.com>
Signed-off-by: Takashi Iwai <tiwai@suse.de>
---
 ld10k1/configure.ac      | 1 +
 ld10k1/src/ld10k1_fnc1.c | 2 +-
 2 files changed, 2 insertions(+), 1 deletion(-)

diff --git a/ld10k1/configure.ac b/ld10k1/configure.ac
index 276b24e..f48ca31 100644
--- a/ld10k1/configure.ac
+++ b/ld10k1/configure.ac
@@ -4,6 +4,7 @@ AC_CONFIG_MACRO_DIR([m4])
 AM_MAINTAINER_MODE([enable])
 
 AC_CONFIG_HEADERS(config.h)
+AC_USE_SYSTEM_EXTENSIONS
 AC_PROG_CC
 AC_PROG_LD
 AC_PROG_INSTALL
diff --git a/ld10k1/src/ld10k1_fnc1.c b/ld10k1/src/ld10k1_fnc1.c
index 343584c..ddc43c6 100644
--- a/ld10k1/src/ld10k1_fnc1.c
+++ b/ld10k1/src/ld10k1_fnc1.c
@@ -179,7 +179,7 @@ int main_loop(comm_param *param, int audigy, const char *card_id, int tram_size,
 {
 	fd_set active_fd_set/*, read_fd_set*/;
 	int i, j, res = 0;
-	__sighandler_t old_sig_pipe;
+	sighandler_t old_sig_pipe;
 
 	int main_sock = 0;
 	int data_sock = 0;
-- 
2.11.0