From 41c029755502acf01ed634db437ac06d09be6c41 Mon Sep 17 00:00:00 2001
From: Thomas Petazzoni <thomas.petazzoni@bootlin.com>
Date: Fri, 13 Apr 2018 09:02:37 +0200
Subject: [PATCH] Don't use fork() on noMMU platforms
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Signed-off-by: Thomas Petazzoni <thomas.petazzoni@bootlin.com>
[Jörg: update patch for 1.1.6]
Signed-off-by: Jörg Krause <joerg.krause@embedded.rocks>
Upstream: http://mailman.alsa-project.org/pipermail/alsa-devel/2018-November/141376.html
[Bernd: update patch for 1.2.4 & 1.2.7]
Signed-off-by: Bernd Kuhls <bernd.kuhls@t-online.de>
---
 configure.ac         |  2 ++
 src/pcm/pcm_direct.c | 10 +++++++++-
 2 files changed, 11 insertions(+), 1 deletion(-)

diff --git a/configure.ac b/configure.ac
index cce195ae..0c852434 100644
--- a/configure.ac
+++ b/configure.ac
@@ -52,6 +52,8 @@ dnl Checks for library functions.
 AC_CHECK_FUNCS([uselocale])
 AC_CHECK_FUNCS([eaccess])
 
+AC_CHECK_FUNC([fork])
+
 SAVE_LIBRARY_VERSION
 AC_SUBST(LIBTOOL_VERSION_INFO)
 
diff --git a/src/pcm/pcm_direct.c b/src/pcm/pcm_direct.c
index 2b07eff9..4dc3ea26 100644
--- a/src/pcm/pcm_direct.c
+++ b/src/pcm/pcm_direct.c
@@ -437,13 +437,21 @@ int snd_pcm_direct_server_create(snd_pcm_direct_t *dmix)
 		close(dmix->server_fd);
 		return ret;
 	}
-	
+
+#ifdef HAVE_FORK
 	ret = fork();
+#else
+	ret = vfork();
+#endif
 	if (ret < 0) {
 		close(dmix->server_fd);
 		return ret;
 	} else if (ret == 0) {
+#ifdef HAVE_FORK
 		ret = fork();
+#else
+		ret = vfork();
+#endif
 		if (ret == 0)
 			server_job(dmix);
 		_exit(EXIT_SUCCESS);
-- 
2.14.3