alsa-lib: allow to build for noMMU targets, patches from Buildroot

package/alsa-lib/Makefile

@@ -5,7 +5,7 @@ include ${ADK_TOPDIR}/rules.mk
 
 PKG_NAME:=		alsa-lib
 PKG_VERSION:=		1.0.29
-PKG_RELEASE:=		4
+PKG_RELEASE:=		5
 PKG_HASH:=		73043c35eb9636be0f4af6a240235c213f12a25feb1f04aeeac8cb7e30fcbdd0
 PKG_DESCR:=		sound library
 PKG_SECTION:=		libs/audio

package/alsa-lib/patches/patch-configure_ac

@@ -1,6 +1,13 @@
---- alsa-lib-1.0.28.orig/configure.ac	2014-06-17 14:34:19.000000000 +0200
-+++ alsa-lib-1.0.28/configure.ac	2014-08-19 21:19:11.000000000 +0200
-@@ -72,16 +72,6 @@ AC_SUBST(LIBTOOL_VERSION_INFO)
+--- alsa-lib-1.0.29.orig/configure.ac	2015-02-26 13:34:52.000000000 +0100
++++ alsa-lib-1.0.29/configure.ac	2016-11-20 18:20:58.456540169 +0100
+@@ -67,21 +67,13 @@ dnl Checks for library functions.
+ AC_PROG_GCC_TRADITIONAL
+ AC_CHECK_FUNCS([uselocale])
+ 
++AC_CHECK_FUNC([fork])
++
+ SAVE_LIBRARY_VERSION
+ AC_SUBST(LIBTOOL_VERSION_INFO)
  
  test "x$prefix" = xNONE && prefix=$ac_default_prefix
  

package/alsa-lib/patches/patch-include_pcm_h

@@ -1,7 +1,7 @@
 * added idea/patch from https://github.com/rofl0r/sabotage
 
---- alsa-lib-1.0.27.2.orig/include/pcm.h	2013-07-08 14:31:36.000000000 +0200
-+++ alsa-lib-1.0.27.2/include/pcm.h	2013-09-16 17:04:30.000000000 +0200
+--- alsa-lib-1.0.29.orig/include/pcm.h	2015-02-26 13:34:52.000000000 +0100
++++ alsa-lib-1.0.29/include/pcm.h	2016-11-20 18:14:09.708758715 +0100
 @@ -33,6 +33,8 @@
  extern "C" {
  #endif
@@ -11,7 +11,7 @@
  /**
   *  \defgroup PCM PCM Interface
   *  See the \ref pcm page for more details.
-@@ -1048,10 +1050,10 @@ int snd_pcm_format_width(snd_pcm_format_
+@@ -1063,10 +1065,10 @@ int snd_pcm_format_width(snd_pcm_format_
  int snd_pcm_format_physical_width(snd_pcm_format_t format);		/* in bits */
  snd_pcm_format_t snd_pcm_build_linear_format(int width, int pwidth, int unsignd, int big_endian);
  ssize_t snd_pcm_format_size(snd_pcm_format_t format, size_t samples);

package/alsa-lib/patches/patch-src_pcm_pcm_direct_c

@@ -0,0 +1,25 @@
+--- alsa-lib-1.0.29.orig/src/pcm/pcm_direct.c	2015-02-26 13:34:52.000000000 +0100
++++ alsa-lib-1.0.29/src/pcm/pcm_direct.c	2016-11-20 18:20:58.456540169 +0100
+@@ -424,13 +424,21 @@ int snd_pcm_direct_server_create(snd_pcm
+ 		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);