optimize

[pf3gnuchains/gcc-fork.git] / gcc / system.h

diff --git a/gcc/system.h b/gcc/system.h
index b3d9974..90d906b 100644 (file)
--- a/gcc/system.h
+++ b/gcc/system.h
@@ -372,13 +372,6 @@ extern int snprintf (char *, size_t, const char *, ...);
   ((GCC_VERSION >= 2007) || (__STDC_VERSION__ >= 199901L))
 #endif
 
-/* 1 if we have _Bool.  */
-#ifndef HAVE__BOOL
-# define HAVE__BOOL \
-   ((GCC_VERSION >= 3000) || (__STDC_VERSION__ >= 199901L))
-#endif
-
-
 #if HAVE_SYS_STAT_H
 # include <sys/stat.h>
 #endif
@@ -421,16 +414,6 @@ extern int snprintf (char *, size_t, const char *, ...);
 # endif
 #endif
 
-/* Approximate O_NONBLOCK.  */
-#ifndef O_NONBLOCK
-#define O_NONBLOCK O_NDELAY
-#endif
-
-/* Approximate O_NOCTTY.  */
-#ifndef O_NOCTTY
-#define O_NOCTTY 0
-#endif
-
 /* Define well known filenos if the system does not define them.  */
 #ifndef STDIN_FILENO
 # define STDIN_FILENO   0
@@ -495,14 +478,6 @@ extern int snprintf (char *, size_t, const char *, ...);
 #define ENUM_BITFIELD(TYPE) unsigned int
 #endif
 
-/* We only use bool bitfields with gcc3.  Some supposedly C99
-   compilers don't handle them correctly.  */
-#if (GCC_VERSION >= 3000)
-#define BOOL_BITFIELD _Bool
-#else
-#define BOOL_BITFIELD unsigned int
-#endif
-
 #ifndef offsetof
 #define offsetof(TYPE, MEMBER) ((size_t) &((TYPE *) 0)->MEMBER)
 #endif
@@ -521,29 +496,27 @@ extern int snprintf (char *, size_t, const char *, ...);
 #define __builtin_expect(a, b) (a)
 #endif
 
-/* Provide some sort of boolean type.  We use stdbool.h if it's
-  available.  This must be after all inclusion of system headers,
-  as some of them will mess us up.  */
+/* Provide a fake boolean type.  We make no attempt to use the
+   C99 _Bool, as it may not be available in the bootstrap compiler,
+   and even if it is, it is liable to be buggy.  
+   This must be after all inclusion of system headers, as some of
+   them will mess us up.  */
 #undef bool
 #undef true
 #undef false
 #undef TRUE
 #undef FALSE
 
-#ifdef HAVE_STDBOOL_H
-# include <stdbool.h>
-#else
-# if !HAVE__BOOL
-typedef char _Bool;
-# endif
-# define bool _Bool
-# define true 1
-# define false 0
-#endif
+#define bool unsigned char
+#define true 1
+#define false 0
 
 #define TRUE true
 #define FALSE false
 
+/* Some compilers do not allow the use of unsigned char in bitfields.  */
+#define BOOL_BITFIELD unsigned int
+
 /* As the last action in this file, we poison the identifiers that
    shouldn't be used.  Note, luckily gcc-3.0's token-based integrated
    preprocessor won't trip on poisoned identifiers that arrive from
@@ -606,7 +579,8 @@ typedef char _Bool;
        STRUCT_VALUE_INCOMING STRICT_ARGUMENT_NAMING                    \
        PROMOTE_FUNCTION_RETURN PROMOTE_PROTOTYPES STRUCT_VALUE_REGNUM  \
        SETUP_INCOMING_VARARGS EXPAND_BUILTIN_SAVEREGS                  \
-       DEFAULT_SHORT_ENUMS SPLIT_COMPLEX_ARGS MD_ASM_CLOBBERS
+       DEFAULT_SHORT_ENUMS SPLIT_COMPLEX_ARGS MD_ASM_CLOBBERS          \
+       HANDLE_PRAGMA_REDEFINE_EXTNAME HANDLE_PRAGMA_EXTERN_PREFIX
 
 /* Other obsolete target macros, or macros that used to be in target
    headers and were not used, and may be obsolete or may never have
@@ -643,7 +617,8 @@ typedef char _Bool;
        TRADITIONAL_PIPELINE_INTERFACE DFA_PIPELINE_INTERFACE              \
        DBX_OUTPUT_STANDARD_TYPES BUILTIN_SETJMP_FRAME_VALUE               \
        SUNOS4_SHARED_LIBRARIES PROMOTE_FOR_CALL_ONLY                      \
-       NO_RECURSIVE_FUNCTION_CSE
+       SPACE_AFTER_L_OPTION NO_RECURSIVE_FUNCTION_CSE                     \
+       DEFAULT_MAIN_RETURN TARGET_MEM_FUNCTIONS
 
 /* Hooks that are no longer used.  */
  #pragma GCC poison LANG_HOOKS_FUNCTION_MARK LANG_HOOKS_FUNCTION_FREE  \