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1 #ifndef COMPILER_H
2 #define COMPILER_H
3 
4 /*
5  * Doxygen can't cope with some of the more esoteric areas of C, so we
6  * make its life simpler.
7  *
8  */
9 #ifdef DOXYGEN
10 #define __attribute__(x)
11 #endif
12 
13 /** @file
14  *
15  * Global compiler definitions.
16  *
17  * This file is implicitly included by every @c .c file in Etherboot.
18  * It defines global macros such as DBG().
19  *
20  * We arrange for each object to export the symbol @c obj_OBJECT
21  * (where @c OBJECT is the object name, e.g. @c rtl8139) as a global
22  * symbol, so that the linker can drag in selected object files from
23  * the library using <tt> -u obj_OBJECT </tt>.
24  *
25  */
26 
27 /* Force visibility of all symbols to "hidden", i.e. inform gcc that
28  * all symbol references resolve strictly within our final binary.
29  * This avoids unnecessary PLT/GOT entries on x86_64.
30  *
31  * This is a stronger claim than specifying "-fvisibility=hidden",
32  * since it also affects symbols marked with "extern".
33  */
34 #ifndef ASSEMBLY
35 #if __GNUC__ >= 4
36 #pragma GCC visibility push(hidden)
37 #endif
38 #endif /* ASSEMBLY */
39 
40 #undef _S1
41 #undef _S2
42 #undef _C1
43 #undef _C2
44 
45 /** Concatenate non-expanded arguments */
46 #define _C1( x, y ) x ## y
47 /** Concatenate expanded arguments */
48 #define _C2( x, y ) _C1 ( x, y )
49 
50 /** Stringify non-expanded argument */
51 #define _S1( x ) #x
52 /** Stringify expanded argument */
53 #define _S2( x ) _S1 ( x )
54 
55 /**
56  * @defgroup symmacros Macros to provide or require explicit symbols
57  * @{
58  */
59 
60 /** Provide a symbol within this object file */
61 #ifdef ASSEMBLY
62 #define PROVIDE_SYMBOL( _sym )				\
63 	.globl	_sym ;					\
64 	.comm	_sym, 0
65 #else /* ASSEMBLY */
66 #define PROVIDE_SYMBOL( _sym )				\
67 	char _sym[0]
68 #endif /* ASSEMBLY */
69 
70 /** Require a symbol within this object file
71  *
72  * The symbol is referenced by a relocation in a discarded section, so
73  * if it is not available at link time the link will fail.
74  */
75 #ifdef ASSEMBLY
76 #define REQUIRE_SYMBOL( _sym )				\
77 	.section ".discard", "a", @progbits ;		\
78 	.extern	_sym ;					\
79 	.long	_sym ;					\
80 	.previous
81 #else /* ASSEMBLY */
82 #define REQUIRE_SYMBOL( _sym )				\
83 	extern char _sym;				\
84 	static char * _C2 ( _C2 ( __require_, _sym ), _C2 ( _, __LINE__ ) ) \
85 		__attribute__ (( section ( ".discard" ), used )) \
86 		= &_sym
87 #endif
88 
89 /** Request that a symbol be available at runtime
90  *
91  * The requested symbol is entered as undefined into the symbol table
92  * for this object, so the linker will pull in other object files as
93  * necessary to satisfy the reference. However, the undefined symbol
94  * is not referenced in any relocations, so the link can still succeed
95  * if no file contains it.
96  *
97  * A symbol passed to this macro may not be referenced anywhere
98  * else in the file. If you want to do that, see IMPORT_SYMBOL().
99  */
100 #ifdef ASSEMBLY
101 #define REQUEST_SYMBOL( _sym )				\
102 	.equ	__need_ ## _sym, _sym
103 #else /* ASSEMBLY */
104 #define REQUEST_SYMBOL( _sym )				\
105 	__asm__ ( ".equ\t__need_" #_sym ", " #_sym )
106 #endif /* ASSEMBLY */
107 
108 /** Set up a symbol to be usable in another file by IMPORT_SYMBOL()
109  *
110  * The symbol must already be marked as global.
111  */
112 #define EXPORT_SYMBOL( _sym )	PROVIDE_SYMBOL ( __export_ ## _sym )
113 
114 /** Make a symbol usable to this file if available at link time
115  *
116  * If no file passed to the linker contains the symbol, it will have
117  * @c NULL value to future uses. Keep in mind that the symbol value is
118  * really the @e address of a variable or function; see the code
119  * snippet below.
120  *
121  * In C using IMPORT_SYMBOL, you must specify the declaration as the
122  * second argument, for instance
123  *
124  * @code
125  *   IMPORT_SYMBOL ( my_func, int my_func ( int arg ) );
126  *   IMPORT_SYMBOL ( my_var, int my_var );
127  *
128  *   void use_imports ( void ) {
129  * 	if ( my_func && &my_var )
130  * 	   my_var = my_func ( my_var );
131  *   }
132  * @endcode
133  *
134  * GCC considers a weak declaration to override a strong one no matter
135  * which comes first, so it is safe to include a header file declaring
136  * the imported symbol normally, but providing the declaration to
137  * IMPORT_SYMBOL is still required.
138  *
139  * If no EXPORT_SYMBOL declaration exists for the imported symbol in
140  * another file, the behavior will be most likely be identical to that
141  * for an unavailable symbol.
142  */
143 #ifdef ASSEMBLY
144 #define IMPORT_SYMBOL( _sym )				\
145 	REQUEST_SYMBOL ( __export_ ## _sym ) ;		\
146 	.weak	_sym
147 #else /* ASSEMBLY */
148 #define IMPORT_SYMBOL( _sym, _decl )			\
149 	REQUEST_SYMBOL ( __export_ ## _sym ) ;		\
150 	extern _decl __attribute__ (( weak ))
151 #endif
152 
153 /** @} */
154 
155 /**
156  * @defgroup objmacros Macros to provide or require explicit objects
157  * @{
158  */
159 
160 #define PREFIX_OBJECT( _prefix ) _C2 ( _prefix, OBJECT )
161 #define OBJECT_SYMBOL PREFIX_OBJECT ( obj_ )
162 #define REQUEST_EXPANDED( _sym ) REQUEST_SYMBOL ( _sym )
163 #define CONFIG_SYMBOL PREFIX_OBJECT ( obj_config_ )
164 
165 /** Always provide the symbol for the current object (defined by -DOBJECT) */
166 PROVIDE_SYMBOL ( OBJECT_SYMBOL );
167 
168 /** Pull in an object-specific configuration file if available */
169 REQUEST_EXPANDED ( CONFIG_SYMBOL );
170 
171 /** Explicitly require another object */
172 #define REQUIRE_OBJECT( _obj ) REQUIRE_SYMBOL ( obj_ ## _obj )
173 
174 /** Pull in another object if it exists */
175 #define REQUEST_OBJECT( _obj ) REQUEST_SYMBOL ( obj_ ## _obj )
176 
177 /** @} */
178 
179 /** Select file identifier for errno.h (if used) */
180 #define ERRFILE PREFIX_OBJECT ( ERRFILE_ )
181 
182 /**
183  * @defgroup weakmacros Macros to manage weak symbol definitions
184  *
185  * Weak symbols allow one to reference a function in another file
186  * without necessarily requiring that file to be linked in. In their
187  * native form, the function will be @c NULL if its file is not linked
188  * in; these macros provide an inline wrapper that returns an
189  * appropriate error indication or default value.
190  *
191  * @{
192  */
193 #ifndef ASSEMBLY
194 
195 /** Mangle @a name into its weakly-referenced implementation */
196 #define __weak_impl( name )   _w_ ## name
197 
198 /**
199  * Declare a weak function with inline safety wrapper
200  *
201  * @v ret	Return type of weak function
202  * @v name	Name of function to expose
203  * @v proto	Parenthesized list of arguments with types
204  * @v args	Parenthesized list of argument names
205  * @v dfl	Value to return if weak function is not available
206  */
207 #define __weak_decl( ret, name, proto, args, dfl )		\
208         ret __weak_impl( name ) proto __attribute__ (( weak ));	\
209         static inline ret name proto {				\
210                 if ( __weak_impl( name ) )			\
211                         return __weak_impl( name ) args;	\
212                 return dfl;					\
213         }
214 
215 #endif
216 /** @} */
217 
218 /** @defgroup dbg Debugging infrastructure
219  * @{
220  */
221 #ifndef ASSEMBLY
222 
223 /** @def DBG
224  *
225  * Print a debugging message.
226  *
227  * The debug level is set at build time by specifying the @c DEBUG=
228  * parameter on the @c make command line.  For example, to enable
229  * debugging for the PCI bus functions (in pci.c) in a @c .dsk image
230  * for the @c rtl8139 card, you could use the command line
231  *
232  * @code
233  *
234  *   make bin/rtl8139.dsk DEBUG=pci
235  *
236  * @endcode
237  *
238  * This will enable the debugging statements (DBG()) in pci.c.  If
239  * debugging is not enabled, DBG() statements will be ignored.
240  *
241  * You can enable debugging in several objects simultaneously by
242  * separating them with commas, as in
243  *
244  * @code
245  *
246  *   make bin/rtl8139.dsk DEBUG=pci,buffer,heap
247  *
248  * @endcode
249  *
250  * You can increase the debugging level for an object by specifying it
251  * with @c :N, where @c N is the level, as in
252  *
253  * @code
254  *
255  *   make bin/rtl8139.dsk DEBUG=pci,buffer:2,heap
256  *
257  * @endcode
258  *
259  * which would enable debugging for the PCI, buffer-handling and
260  * heap-allocation code, with the buffer-handling code at level 2.
261  *
262  */
263 
264 /*
265  * If debug_OBJECT is set to a true value, the macro DBG(...) will
266  * expand to printf(...) when compiling OBJECT, and the symbol
267  * DEBUG_LEVEL will be inserted into the object file.
268  *
269  */
270 #define DEBUG_SYMBOL PREFIX_OBJECT ( debug_ )
271 
272 /** printf() for debugging
273  *
274  * This function exists so that the DBG() macros can expand to
275  * printf() calls without dragging the printf() prototype into scope.
276  *
277  * As far as the compiler is concerned, dbg_printf() and printf() are
278  * completely unrelated calls; it's only at the assembly stage that
279  * references to the dbg_printf symbol are collapsed into references
280  * to the printf symbol.
281  */
282 extern int __attribute__ (( format ( printf, 1, 2 ) ))
283 dbg_printf ( const char *fmt, ... ) asm ( "printf" );
284 
285 extern void dbg_autocolourise ( unsigned long id );
286 extern void dbg_decolourise ( void );
287 extern void dbg_hex_dump_da ( unsigned long dispaddr,
288 			      const void *data, unsigned long len );
289 
290 #if DEBUG_SYMBOL
291 #define DBGLVL_MAX DEBUG_SYMBOL
292 #else
293 #define DBGLVL_MAX 0
294 #endif
295 
296 /* Allow for selective disabling of enabled debug levels */
297 #if DBGLVL_MAX
298 int __debug_disable;
299 #define DBGLVL ( DBGLVL_MAX & ~__debug_disable )
300 #define DBG_DISABLE( level ) do {				\
301 	__debug_disable |= ( (level) & DBGLVL_MAX );		\
302 	} while ( 0 )
303 #define DBG_ENABLE( level ) do {				\
304 	__debug_disable &= ~( (level) & DBGLVL_MAX );		\
305 	} while ( 0 )
306 #else
307 #define DBGLVL 0
308 #define DBG_DISABLE( level ) do { } while ( 0 )
309 #define DBG_ENABLE( level ) do { } while ( 0 )
310 #endif
311 
312 #define DBGLVL_LOG	1
313 #define DBG_LOG		( DBGLVL & DBGLVL_LOG )
314 #define DBGLVL_EXTRA	2
315 #define DBG_EXTRA	( DBGLVL & DBGLVL_EXTRA )
316 #define DBGLVL_PROFILE	4
317 #define DBG_PROFILE	( DBGLVL & DBGLVL_PROFILE )
318 #define DBGLVL_IO	8
319 #define DBG_IO		( DBGLVL & DBGLVL_IO )
320 
321 /**
322  * Print debugging message if we are at a certain debug level
323  *
324  * @v level		Debug level
325  * @v ...		printf() argument list
326  */
327 #define DBG_IF( level, ... ) do {				\
328 		if ( DBG_ ## level ) {				\
329 			dbg_printf ( __VA_ARGS__ );		\
330 		}						\
331 	} while ( 0 )
332 
333 /**
334  * Print a hex dump if we are at a certain debug level
335  *
336  * @v level		Debug level
337  * @v dispaddr		Display address
338  * @v data		Data to print
339  * @v len		Length of data
340  */
341 #define DBG_HDA_IF( level, dispaddr, data, len )  do {		\
342 		if ( DBG_ ## level ) {				\
343 			union {					\
344 				unsigned long ul;		\
345 				typeof ( dispaddr ) raw;	\
346 			} da;					\
347 			da.raw = dispaddr;			\
348 			dbg_hex_dump_da ( da.ul, data, len );	\
349 		}						\
350 	} while ( 0 )
351 
352 /**
353  * Print a hex dump if we are at a certain debug level
354  *
355  * @v level		Debug level
356  * @v data		Data to print
357  * @v len		Length of data
358  */
359 #define DBG_HD_IF( level, data, len ) do {			\
360 		const void *_data = data;			\
361 		DBG_HDA_IF ( level, _data, _data, len );	\
362 	} while ( 0 )
363 
364 /**
365  * Select colour for debug messages if we are at a certain debug level
366  *
367  * @v level		Debug level
368  * @v id		Message stream ID
369  */
370 #define DBG_AC_IF( level, id ) do {				\
371 		if ( DBG_ ## level ) {				\
372 			union {					\
373 				unsigned long ul;		\
374 				typeof ( id ) raw;		\
375 			} dbg_stream;				\
376 			dbg_stream.raw = id;			\
377 			dbg_autocolourise ( dbg_stream.ul );	\
378 		}						\
379 	} while ( 0 )
380 
381 /**
382  * Revert colour for debug messages if we are at a certain debug level
383  *
384  * @v level		Debug level
385  */
386 #define DBG_DC_IF( level ) do {					\
387 		if ( DBG_ ## level ) {				\
388 			dbg_decolourise();			\
389 		}						\
390 	} while ( 0 )
391 
392 /* Autocolourising versions of the DBGxxx_IF() macros */
393 
394 #define DBGC_IF( level, id, ... ) do {				\
395 		DBG_AC_IF ( level, id );			\
396 		DBG_IF ( level, __VA_ARGS__ );			\
397 		DBG_DC_IF ( level );				\
398 	} while ( 0 )
399 
400 #define DBGC_HDA_IF( level, id, ... ) do {			\
401 		DBG_AC_IF ( level, id );			\
402 		DBG_HDA_IF ( level, __VA_ARGS__ );		\
403 		DBG_DC_IF ( level );				\
404 	} while ( 0 )
405 
406 #define DBGC_HD_IF( level, id, ... ) do {			\
407 		DBG_AC_IF ( level, id );			\
408 		DBG_HD_IF ( level, __VA_ARGS__ );		\
409 		DBG_DC_IF ( level );				\
410 	} while ( 0 )
411 
412 /* Versions of the DBGxxx_IF() macros that imply DBGxxx_IF( LOG, ... )*/
413 
414 #define DBG( ... )		DBG_IF		( LOG, __VA_ARGS__ )
415 #define DBG_HDA( ... )		DBG_HDA_IF	( LOG, __VA_ARGS__ )
416 #define DBG_HD( ... )		DBG_HD_IF	( LOG, __VA_ARGS__ )
417 #define DBGC( ... )		DBGC_IF		( LOG, __VA_ARGS__ )
418 #define DBGC_HDA( ... )		DBGC_HDA_IF	( LOG, __VA_ARGS__ )
419 #define DBGC_HD( ... )		DBGC_HD_IF	( LOG, __VA_ARGS__ )
420 
421 /* Versions of the DBGxxx_IF() macros that imply DBGxxx_IF( EXTRA, ... )*/
422 
423 #define DBG2( ... )		DBG_IF		( EXTRA, __VA_ARGS__ )
424 #define DBG2_HDA( ... )		DBG_HDA_IF	( EXTRA, __VA_ARGS__ )
425 #define DBG2_HD( ... )		DBG_HD_IF	( EXTRA, __VA_ARGS__ )
426 #define DBGC2( ... )		DBGC_IF		( EXTRA, __VA_ARGS__ )
427 #define DBGC2_HDA( ... )	DBGC_HDA_IF	( EXTRA, __VA_ARGS__ )
428 #define DBGC2_HD( ... )		DBGC_HD_IF	( EXTRA, __VA_ARGS__ )
429 
430 /* Versions of the DBGxxx_IF() macros that imply DBGxxx_IF( PROFILE, ... )*/
431 
432 #define DBGP( ... )		DBG_IF		( PROFILE, __VA_ARGS__ )
433 #define DBGP_HDA( ... )		DBG_HDA_IF	( PROFILE, __VA_ARGS__ )
434 #define DBGP_HD( ... )		DBG_HD_IF	( PROFILE, __VA_ARGS__ )
435 #define DBGCP( ... )		DBGC_IF		( PROFILE, __VA_ARGS__ )
436 #define DBGCP_HDA( ... )	DBGC_HDA_IF	( PROFILE, __VA_ARGS__ )
437 #define DBGCP_HD( ... )		DBGC_HD_IF	( PROFILE, __VA_ARGS__ )
438 
439 /* Versions of the DBGxxx_IF() macros that imply DBGxxx_IF( IO, ... )*/
440 
441 #define DBGIO( ... )		DBG_IF		( IO, __VA_ARGS__ )
442 #define DBGIO_HDA( ... )	DBG_HDA_IF	( IO, __VA_ARGS__ )
443 #define DBGIO_HD( ... )		DBG_HD_IF	( IO, __VA_ARGS__ )
444 #define DBGCIO( ... )		DBGC_IF		( IO, __VA_ARGS__ )
445 #define DBGCIO_HDA( ... )	DBGC_HDA_IF	( IO, __VA_ARGS__ )
446 #define DBGCIO_HD( ... )	DBGC_HD_IF	( IO, __VA_ARGS__ )
447 
448 
449 #if DEBUG_SYMBOL == 0
450 #define NDEBUG
451 #endif
452 
453 #endif /* ASSEMBLY */
454 /** @} */
455 
456 /** @defgroup attrs Miscellaneous attributes
457  * @{
458  */
459 #ifndef ASSEMBLY
460 
461 /** Declare a data structure as packed. */
462 #define PACKED __attribute__ (( packed ))
463 
464 /** Declare a variable or data structure as unused. */
465 #define __unused __attribute__ (( unused ))
466 
467 /**
468  * Declare a function as pure - i.e. without side effects
469  */
470 #define __pure __attribute__ (( pure ))
471 
472 /**
473  * Declare a function as const - i.e. it does not access global memory
474  * (including dereferencing pointers passed to it) at all.
475  * Must also not call any non-const functions.
476  */
477 #define __const __attribute__ (( const ))
478 
479 /**
480  * Declare a function's pointer parameters as non-null - i.e. force
481  * compiler to check pointers at compile time and enable possible
482  * optimizations based on that fact
483  */
484 #define __nonnull __attribute__ (( nonnull ))
485 
486 /**
487  * Declare a pointer returned by a function as a unique memory address
488  * as returned by malloc-type functions.
489  */
490 #define __malloc __attribute__ (( malloc ))
491 
492 /**
493  * Declare a function as used.
494  *
495  * Necessary only if the function is called only from assembler code.
496  */
497 #define __used __attribute__ (( used ))
498 
499 /** Declare a data structure to be aligned with 16-byte alignment */
500 #define __aligned __attribute__ (( aligned ( 16 ) ))
501 
502 /** Declare a function to be always inline */
503 #define __always_inline __attribute__ (( always_inline ))
504 
505 /**
506  * Shared data.
507  *
508  * To save space in the binary when multiple-driver images are
509  * compiled, uninitialised data areas can be shared between drivers.
510  * This will typically be used to share statically-allocated receive
511  * and transmit buffers between drivers.
512  *
513  * Use as e.g.
514  *
515  * @code
516  *
517  *   struct {
518  *	char	rx_buf[NUM_RX_BUF][RX_BUF_SIZE];
519  *	char	tx_buf[TX_BUF_SIZE];
520  *   } my_static_data __shared;
521  *
522  * @endcode
523  *
524  */
525 #define __shared __asm__ ( "_shared_bss" ) __aligned
526 
527 #endif /* ASSEMBLY */
528 /** @} */
529 
530 /**
531  * Optimisation barrier
532  */
533 #ifndef ASSEMBLY
534 #define barrier() __asm__ __volatile__ ( "" : : : "memory" )
535 #endif /* ASSEMBLY */
536 
537 /**
538  * @defgroup licences Licence declarations
539  *
540  * For reasons that are partly historical, various different files
541  * within the gPXE codebase have differing licences.
542  *
543  * @{
544  */
545 
546 /** Declare a file as being in the public domain
547  *
548  * This licence declaration is applicable when a file states itself to
549  * be in the public domain.
550  */
551 #define FILE_LICENCE_PUBLIC_DOMAIN \
552 	PROVIDE_SYMBOL ( __licence_public_domain )
553 
554 /** Declare a file as being under version 2 (or later) of the GNU GPL
555  *
556  * This licence declaration is applicable when a file states itself to
557  * be licensed under the GNU GPL; "either version 2 of the License, or
558  * (at your option) any later version".
559  */
560 #define FILE_LICENCE_GPL2_OR_LATER \
561 	PROVIDE_SYMBOL ( __licence_gpl2_or_later )
562 
563 /** Declare a file as being under version 2 of the GNU GPL
564  *
565  * This licence declaration is applicable when a file states itself to
566  * be licensed under version 2 of the GPL, and does not include the
567  * "or, at your option, any later version" clause.
568  */
569 #define FILE_LICENCE_GPL2_ONLY \
570 	PROVIDE_SYMBOL ( __licence_gpl2_only )
571 
572 /** Declare a file as being under any version of the GNU GPL
573  *
574  * This licence declaration is applicable when a file states itself to
575  * be licensed under the GPL, but does not specify a version.
576  *
577  * According to section 9 of the GPLv2, "If the Program does not
578  * specify a version number of this License, you may choose any
579  * version ever published by the Free Software Foundation".
580  */
581 #define FILE_LICENCE_GPL_ANY \
582 	PROVIDE_SYMBOL ( __licence_gpl_any )
583 
584 /** Declare a file as being under the three-clause BSD licence
585  *
586  * This licence declaration is applicable when a file states itself to
587  * be licensed under terms allowing redistribution in source and
588  * binary forms (with or without modification) provided that:
589  *
590  *     redistributions of source code retain the copyright notice,
591  *     list of conditions and any attached disclaimers
592  *
593  *     redistributions in binary form reproduce the copyright notice,
594  *     list of conditions and any attached disclaimers in the
595  *     documentation and/or other materials provided with the
596  *     distribution
597  *
598  *     the name of the author is not used to endorse or promote
599  *     products derived from the software without specific prior
600  *     written permission
601  *
602  * It is not necessary for the file to explicitly state that it is
603  * under a "BSD" licence; only that the licensing terms be
604  * functionally equivalent to the standard three-clause BSD licence.
605  */
606 #define FILE_LICENCE_BSD3 \
607 	PROVIDE_SYMBOL ( __licence_bsd3 )
608 
609 /** Declare a file as being under the two-clause BSD licence
610  *
611  * This licence declaration is applicable when a file states itself to
612  * be licensed under terms allowing redistribution in source and
613  * binary forms (with or without modification) provided that:
614  *
615  *     redistributions of source code retain the copyright notice,
616  *     list of conditions and any attached disclaimers
617  *
618  *     redistributions in binary form reproduce the copyright notice,
619  *     list of conditions and any attached disclaimers in the
620  *     documentation and/or other materials provided with the
621  *     distribution
622  *
623  * It is not necessary for the file to explicitly state that it is
624  * under a "BSD" licence; only that the licensing terms be
625  * functionally equivalent to the standard two-clause BSD licence.
626  */
627 #define FILE_LICENCE_BSD2 \
628 	PROVIDE_SYMBOL ( __licence_bsd2 )
629 
630 /** Declare a file as being under the one-clause MIT-style licence
631  *
632  * This licence declaration is applicable when a file states itself to
633  * be licensed under terms allowing redistribution for any purpose
634  * with or without fee, provided that the copyright notice and
635  * permission notice appear in all copies.
636  */
637 #define FILE_LICENCE_MIT \
638 	PROVIDE_SYMBOL ( __licence_mit )
639 
640 /** Declare a particular licence as applying to a file */
641 #define FILE_LICENCE( _licence ) FILE_LICENCE_ ## _licence
642 
643 /** @} */
644 
645 /* This file itself is under GPLv2-or-later */
646 FILE_LICENCE ( GPL2_OR_LATER );
647 
648 #include <bits/compiler.h>
649 
650 #endif /* COMPILER_H */
651