IIOD: Define __bswap_constant_16/32 if not already defined

The musl C library does not define these macros.

Signed-off-by: Paul Cercueil <[email protected]>

iiod/iiod.c

@@ -47,6 +47,17 @@
 
 #define IIOD_PORT 30431
 
+#ifndef __bswap_constant_16
+#define __bswap_constant_16(x) \
+	((unsigned short int) ((((x) >> 8) & 0xff) | (((x) & 0xff) << 8)))
+#endif
+
+#ifndef __bswap_constant_32
+#define __bswap_constant_32(x) \
+	((((x) & 0xff000000) >> 24) | (((x) & 0x00ff0000) >>  8) | \
+	 (((x) & 0x0000ff00) <<  8) | (((x) & 0x000000ff) << 24))
+#endif
+
 struct client_data {
 	int fd;
 	bool debug;