commit 1061376c894254358a75b53db0676ef84e4da2a7
author Jens Axboe <axboe@fb.com> Mon Sep 29 16:07:54 2014 -0600
committer Mohamad Ayyash <mkayyash@google.com> Fri Mar 06 17:57:19 2015 -0800
tree 389c547db928e2a4549bf09764f16981e6d6a158
parent 5420b3491fe3c7e8fd45e8ece9338c51a720e5b4

Fix compile of t/btrace2fio on RHEL5/CentOS5

Get these errors:

t/btrace2fio.c:395: undefined reference to `__bswap_32'
t/btrace2fio.c:396: undefined reference to `__bswap_32'
t/btrace2fio.c:397: undefined reference to `__bswap_64'
t/btrace2fio.c:398: undefined reference to `__bswap_64'
t/btrace2fio.c:399: undefined reference to `__bswap_32'
t/btrace2fio.c:400: undefined reference to `__bswap_32'
t/btrace2fio.c:401: undefined reference to `__bswap_32'
t/btrace2fio.c:402: undefined reference to `__bswap_32'
t/btrace2fio.c:403: undefined reference to `__bswap_32'
t/btrace2fio.c:404: undefined reference to `__bswap_16'
t/btrace2fio.c:405: undefined reference to `__bswap_16'

Issue is that os/os-linux.h needs to include byteswap.h.

Signed-off-by: Jens Axboe <axboe@fb.com>

os/os-linux.h

diff --git a/os/os-linux.h b/os/os-linux.h
index 81d0402..e193634 100644
--- a/os/os-linux.h
+++ b/os/os-linux.h
@@ -15,6 +15,7 @@
 #include <linux/unistd.h>
 #include <linux/raw.h>
 #include <linux/major.h>
+#include <byteswap.h>
 
 #include "binject.h"
 #include "../file.h"
@@ -208,9 +209,21 @@
 #define FIO_MADV_FREE	MADV_REMOVE
 #endif
 
+#if defined(__builtin_bswap16)
+#define fio_swap16(x)	__builtin_bswap16(x)
+#else
 #define fio_swap16(x)	__bswap_16(x)
+#endif
+#if defined(__builtin_bswap32)
+#define fio_swap32(x)	__builtin_bswap32(x)
+#else
 #define fio_swap32(x)	__bswap_32(x)
+#endif
+#if defined(__builtin_bswap64)
+#define fio_swap64(x)	__builtin_bswap64(x)
+#else
 #define fio_swap64(x)	__bswap_64(x)
+#endif
 
 #define CACHE_LINE_FILE	\
 	"/sys/devices/system/cpu/cpu0/cache/index0/coherency_line_size"