参考代码

components/system/include/sys/features.h

@@ -0,0 +1,75 @@
+/**
+ * @file features.h
+ * @author 
+ * @brief 
+ * In order to redefine int32_t to int when compiles using GCC, this file is
+ * added to override <sys/features.h> of GCC.
+ * @version 0.1
+ * @date 2021-12-09
+ * 
+ * @copyright Copyright (c) 2021
+ * 
+ */
+
+#ifndef _LIBC_SYS_FEATURES_H_
+#define _LIBC_SYS_FEATURES_H_
+
+/*
+ * Redefine some macros defined by GCC
+ */
+#ifdef __INT32_MAX__
+#undef __INT32_MAX__
+#endif
+#define __INT32_MAX__ 2147483647
+
+#ifdef __UINT32_MAX__
+#undef __UINT32_MAX__
+#endif
+#define __UINT32_MAX__ 4294967295U
+
+#ifdef __INT_LEAST32_MAX__
+#undef __INT_LEAST32_MAX__
+#endif
+#define __INT_LEAST32_MAX__ 2147483647
+
+#ifdef __UINT_LEAST32_MAX__
+#undef __UINT_LEAST32_MAX__
+#endif
+#define __UINT_LEAST32_MAX__ 4294967295U
+
+#ifdef __INT_LEAST32_TYPE__
+#undef __INT_LEAST32_TYPE__
+#endif
+#define __INT_LEAST32_TYPE__ int
+
+#ifdef __UINT_LEAST32_TYPE__
+#undef __UINT_LEAST32_TYPE__
+#endif
+#define __UINT_LEAST32_TYPE__ unsigned int
+
+#ifdef __INT32_C
+#undef __INT32_C
+#endif
+#define __INT32_C(c) c
+
+#ifdef __UINT32_C
+#undef __UINT32_C
+#endif
+#define __UINT32_C(c) c ## U
+
+#ifdef __INT32_TYPE__
+#undef __INT32_TYPE__
+#endif
+#define __INT32_TYPE__ int
+
+#ifdef __UINT32_TYPE__
+#undef __UINT32_TYPE__
+#endif
+#define __UINT32_TYPE__ unsigned int
+
+/*
+ * Include <sys/features.h> of compiler
+ */
+#include_next <sys/features.h>
+
+#endif /* _LIBC_SYS_FEATURES_H_ */