app/testpmd: fix macro check for little endian

Compiling with clang on FreeBSD gave a compilation error:
app/test-pmd/csumonly.c:84:5: fatal error: '__BYTE_ORDER' is not defined, evaluates to 0 [-Wundef]

Querying the preprocessor defines show both the define and value used
are incorrect.
	$ clang -dM -E - < /dev/null | grep BYTE
	\#define  __BYTE_ORDER__  __ORDER_LITTLE_ENDIAN__

Changing the check to  __BYTE_ORDER__ == __ORDER_LITTLE_ENDIAN__ then
resolves the issue.

Signed-off-by: Bruce Richardson <bruce.richardson@intel.com>
Acked-by: Thomas Monjalon <thomas.monjalon@6wind.com>

diff --git a/app/test-pmd/csumonly.c b/app/test-pmd/csumonly.c
index d8c080a..6f43761 100644 (file)
--- a/app/test-pmd/csumonly.c
+++ b/app/test-pmd/csumonly.c
@@ -81,7 +81,7 @@
 
 /* we cannot use htons() from arpa/inet.h due to name conflicts, and we
  * cannot use rte_cpu_to_be_16() on a constant in a switch/case */
-#if __BYTE_ORDER == __LITTLE_ENDIAN
+#if  __BYTE_ORDER__ == __ORDER_LITTLE_ENDIAN__
 #define _htons(x) ((uint16_t)((((x) & 0x00ffU) << 8) | (((x) & 0xff00U) >> 8)))
 #else
 #define _htons(x) (x)