[libclc] Add some include guards and format a file

Author: frasercrmck

libclc/generic/include/clc/clc.h

@@ -1,3 +1,6 @@
+#ifndef __CLC_CLC_H__
+#define __CLC_CLC_H__
+
 #ifndef cl_clang_storage_class_specifiers
 #error Implementation requires cl_clang_storage_class_specifiers extension!
 #endif
@@ -286,3 +289,5 @@
 #include <clc/image/image.h>
 
 #pragma OPENCL EXTENSION all : disable
+
+#endif // __CLC_CLC_H__

libclc/generic/include/clc/clcmacros.h

@@ -1,3 +1,6 @@
+#ifndef __CLC_CLCMACROS_H__
+#define __CLC_CLCMACROS_H__
+
 /* 6.9 Preprocessor Directives and Macros
  * Some of these are handled by clang or passed by clover */
 #if __OPENCL_VERSION__ >= 110
@@ -9,10 +12,12 @@
 #define CLC_VERSION_1_2 120
 #endif
 
-#define NULL ((void*)0)
+#define NULL ((void *)0)
 
-#define __kernel_exec(X, typen) __kernel \
-                                __attribute__((work_group_size_hint(X, 1, 1))) \
-                                __attribute__((vec_type_hint(typen)))
+#define __kernel_exec(X, typen)                                                \
+  __kernel __attribute__((work_group_size_hint(X, 1, 1)))                      \
+  __attribute__((vec_type_hint(typen)))
 
 #define kernel_exec(X, typen) __kernel_exec(X, typen)
+
+#endif // __CLC_CLCMACROS_H__