Add support for loongarch

Author: wuruilong01

src/architecture.h

@@ -58,6 +58,7 @@ enum {
         ARCHITECTURE_TILEGX,
         ARCHITECTURE_CRIS,
         ARCHITECTURE_RISCV64,
+	ARCHITECTURE_LOONGARCH,
         _ARCHITECTURE_MAX,
         _ARCHITECTURE_INVALID = -1
 };
@@ -150,6 +151,9 @@ int uname_architecture(void);
 #elif defined(__riscv) && __riscv_xlen == 64
 #  define native_architecture() ARCHITECTURE_RISCV64
 #  define define LIB_ARCH_TUPLE "riscv64-linux-gnu"
+#elif defined(__loongarch__) && __loongarch_grlen == 64
+#  define native_architecture() ARCHITECTURE_LOONGARCH
+#  define define LIB_ARCH_TUPLE "loongarch64-linux-gnu"
 #elif defined(__aarch64__)
 #  if __BYTE_ORDER == __BIG_ENDIAN
 #    define native_architecture() ARCHITECTURE_ARM64_BE