fix: Adding Header guards.

include/list.h

@@ -1,3 +1,6 @@
+#ifndef INCLUDE_SET_LIST_
+#define INCLUDE_SET_LIST_
+
 #include <stddef.h>
 
 struct SETBlockMeta
@@ -31,3 +34,5 @@ void set_ll_free_all(struct SETBlockMeta *head);
  */
 
 struct SETBlockMeta *set_ll_free_one(struct SETBlockMeta *head, void *address);
+
+#endif

include/set.h

@@ -2,6 +2,11 @@
 #define _GNU_SOURCE
 #endif
 
+#ifdef __cplusplus
+extern "C"
+{
+#endif
+
 #include <stdbool.h>
 #include <stdint.h>
 #include <stdlib.h>
@@ -48,8 +53,8 @@ struct SETSuit
     };
 
     /**
- * Internal function header for bundle. Use BUNDLE() macro to define bundle in
- * test.
+     * Internal function header for bundle. Use BUNDLE() macro to define bundle
+     * in test.
      */
     void set_bundle_suits(struct SETSuit **suits, int *counter, bool count);
 
@@ -246,3 +251,7 @@ bool tear_down();
     void test_name##_test(struct SETest *test)
 
 #endif // !INCLUDE_SET_H
+
+#ifdef __cplusplus
+}
+#endif

include/set_asserts.h

@@ -3,8 +3,8 @@
 
 #include "set.h"
 
-#ifndef ASSERT_H
-#define ASSERT_H
+#ifndef INCLUDE_SET_ASSERT_H
+#define INCLUDE_SET_ASSERT_H
 
 #define STATIC_ASSERT(condition) (void)sizeof(char[1 - 2 * (!(condition))])
 

include/utils.h

@@ -1,5 +1,8 @@
 #include <stddef.h>
 
+#ifndef INCLUDE_SET_UTILS_H_
+#define INCLUDE_SET_UTILS_H_
+
 /*
  * Returns pointer to formatted the string.
  *
@@ -52,3 +55,5 @@ void *set_calloc(size_t n, size_t size);
  * See also: set_malloc()
  */
 void *set_realloc(size_t n);
+
+#endif