Add RISC-V 64 bit detection in janet.h
@@ -111,7 +111,8 @@ extern "C" {
|| (defined(__sparc__) && defined(__arch64__) || defined (__sparcv9)) /* BE */ \
|| defined(__s390x__) /* S390 64-bit (BE) */ \
|| (defined(__ppc64__) || defined(__PPC64__)) \
- || defined(__aarch64__) /* ARM 64-bit */
+ || defined(__aarch64__) /* ARM 64-bit */ \
+ || (defined(__riscv) && (__riscv_xlen == 64)) /* RISC-V 64-bit */
#define JANET_64 1
#else
#define JANET_32 1
