[libc]fix size_t ssize_t

1 files changed, 5 insertions, 1 deletions

diff --git a/components/libc/compilers/dlib/sys/types.h b/components/libc/compilers/dlib/sys/types.h
index 4c76dfc429..001ace4dd2 100644
--- a/components/libc/compilers/dlib/sys/types.h
+++ b/components/libc/compilers/dlib/sys/types.h
@@ -15,6 +15,10 @@
 typedef rt_int32_t clockid_t;
 typedef rt_int32_t key_t;       /* Used for interprocess communication. */
 typedef rt_int32_t pid_t;       /* Used for process IDs and process group IDs. */
-typedef signed long ssize_t;    /* Used for a count of bytes or an error indication. */
+#ifndef ARCH_CPU_64BIT
+typedef signed int   ssize_t;  /* Used for a count of bytes or an error indication. */
+#else
+typedef long signed int   ssize_t;  /* Used for a count of bytes or an error indication. */
+#endif
 
 #endif