only use faster SHA-1 code on machines with good libc
Macs don't have byteswap.h or endian.h. Change conditionals to only
use the faster SHA-1 code on little-endian machines with byteswap.h.
diff --git a/include/mincrypt/sha.h b/include/mincrypt/sha.h
index 2bcc5222..af63e87 100644
--- a/include/mincrypt/sha.h
+++ b/include/mincrypt/sha.h
@@ -29,7 +29,6 @@
#define _EMBEDDED_SHA_H_
#include <inttypes.h>
-#include <endian.h>
#ifdef __cplusplus
extern "C" {
@@ -38,7 +37,7 @@
typedef struct SHA_CTX {
uint64_t count;
uint32_t state[5];
-#if __BYTE_ORDER == __LITTLE_ENDIAN
+#if defined(HAVE_ENDIAN_H) && defined(HAVE_LITTLE_ENDIAN)
union {
uint8_t b[64];
uint32_t w[16];