>From c60287a8c5d3175b6df07757241cb59f3b94edb7 Mon Sep 17 00:00:00 2001
From: Patrick Welche <prlw1@cam.ac.uk>
Date: Tue, 12 Nov 2013 14:25:05 +0000
Subject: [PATCH] Portability fix: Use SND_LITTLE_ENDIAN / SND_BIG_ENDIAN
 instead of endian.h

The header file which defines __BYTE_ORDER varies wildly between
OSes, so give autoconf the job of detecting endianness. Use the
answer by defining SND_LITTLE_ENDIAN / SND_BIG_ENDIAN and using
them. (This may require teaching alsa-utilities expecting asoundlib.h
to include endian.h for them to use SND_LITTLE_ENDIAN instead.)
---
 configure.in             | 7 ++++++-
 include/asoundlib-head.h | 1 -
 include/local.h          | 9 +++------
 src/pcm/pcm_file.c       | 3 +--
 4 files changed, 10 insertions(+), 10 deletions(-)

diff --git a/configure.in b/configure.in
index 35fd89f..679decd 100644
--- a/configure.in
+++ b/configure.in
@@ -61,6 +61,7 @@ dnl Checks for typedefs, structures, and compiler characteristics.
 AC_C_CONST
 AC_C_INLINE
 AC_HEADER_TIME
+AC_C_BIGENDIAN
 
 dnl Checks for library functions.
 AC_PROG_GCC_TRADITIONAL
@@ -685,5 +686,9 @@ test "$build_seq" = "yes" && echo "#include <alsa/seq_event.h>" >> include/asoun
 test "$build_seq" = "yes" && echo "#include <alsa/seq.h>" >> include/asoundlib.h
 test "$build_seq" = "yes" && echo "#include <alsa/seqmid.h>" >> include/asoundlib.h
 test "$build_seq" = "yes" && echo "#include <alsa/seq_midi_event.h>" >> include/asoundlib.h
+echo "" >> include/asoundlib.h
+test "$ac_cv_c_bigendian" = "yes" && echo "#define SND_BIG_ENDIAN" >> include/asoundlib.h
+test "$ac_cv_c_bigendian" = "yes" && echo "#define SNDRV_BIG_ENDIAN" >> include/asoundlib.h
+test "$ac_cv_c_bigendian" = "no" && echo "#define SND_LITTLE_ENDIAN" >> include/asoundlib.h
+test "$ac_cv_c_bigendian" = "no" && echo "#define SNDRV_LITTLE_ENDIAN" >> include/asoundlib.h
 cat "$srcdir"/include/asoundlib-tail.h >> include/asoundlib.h
-
diff --git a/include/asoundlib-head.h b/include/asoundlib-head.h
index 71b5c29..31408a4 100644
--- a/include/asoundlib-head.h
+++ b/include/asoundlib-head.h
@@ -35,7 +35,6 @@
 #include <string.h>
 #include <fcntl.h>
 #include <assert.h>
-#include <endian.h>
 #include <sys/poll.h>
 #include <errno.h>
 #include <stdarg.h>
diff --git a/include/local.h b/include/local.h
index 9464efa..1e7c0dc 100644
--- a/include/local.h
+++ b/include/local.h
@@ -28,7 +28,6 @@
 #include <string.h>
 #include <fcntl.h>
 #include <assert.h>
-#include <endian.h>
 #include <stdarg.h>
 #include <sys/poll.h>
 #include <sys/types.h>
@@ -46,14 +45,12 @@
 #define RTLD_NOW	0
 #endif
 
-#if __BYTE_ORDER == __LITTLE_ENDIAN
-#define SND_LITTLE_ENDIAN
-#define SNDRV_LITTLE_ENDIAN
-#elif __BYTE_ORDER == __BIG_ENDIAN
+#ifdef WORDS_BIGENDIAN
 #define SND_BIG_ENDIAN
 #define SNDRV_BIG_ENDIAN
 #else
-#error "Unsupported endian..."
+#define SND_LITTLE_ENDIAN
+#define SNDRV_LITTLE_ENDIAN
 #endif
 
 #define _snd_config_iterator list_head
diff --git a/src/pcm/pcm_file.c b/src/pcm/pcm_file.c
index 7123025..7ee5c37 100644
--- a/src/pcm/pcm_file.c
+++ b/src/pcm/pcm_file.c
@@ -26,7 +26,6 @@
  *
  */
   
-#include <endian.h>
 #include <byteswap.h>
 #include <ctype.h>
 #include <string.h>
@@ -90,7 +89,7 @@ typedef struct {
 	size_t filelen;
 } snd_pcm_file_t;
 
-#if __BYTE_ORDER == __LITTLE_ENDIAN
+#ifdef SND_LITTLE_ENDIAN
 #define TO_LE32(x)	(x)
 #define TO_LE16(x)	(x)
 #else
-- 
1.8.5.2