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unwinder: conditionalise availability 

__attribute__ (( unavailable )) is for Apple specific builds.  Create a macro
to conditionalise the usage of the macro.  This is to aid in porting the
unwinder to other platforms.

llvm-svn: 192868
This commit is contained in:
Saleem Abdulrasool 2013-10-17 03:57:41 +00:00
parent b4d179cc4f
commit 55410fff8e
1 changed files with 15 additions and 9 deletions
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24
libcxxabi/include/unwind.h
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@ -17,6 +17,12 @@
#include <stdint.h>
#include <stddef.h>
#if defined(__APPLE__)
#define LIBUNWIND_AVAIL __attribute__ (( unavailable ))
#else
#define LIBUNWIND_AVAIL
#endif
typedef enum {
_URC_NO_REASON = 0,
_URC_FOREIGN_EXCEPTION_CAUGHT = 1,
@ -181,28 +187,28 @@ extern void *_Unwind_FindEnclosingFunction(void *pc);
// Mac OS X does not support text-rel and data-rel addressing so these functions
// are unimplemented
extern uintptr_t _Unwind_GetDataRelBase(struct _Unwind_Context *context)
__attribute__((unavailable));
LIBUNWIND_AVAIL;
extern uintptr_t _Unwind_GetTextRelBase(struct _Unwind_Context *context)
__attribute__((unavailable));
LIBUNWIND_AVAIL;
// Mac OS X 10.4 and 10.5 had implementations of these functions in
// libgcc_s.dylib, but they never worked.
/// These functions are no longer available on Mac OS X.
extern void __register_frame_info_bases(const void *fde, void *ob, void *tb,
void *db) __attribute__((unavailable));
void *db) LIBUNWIND_AVAIL;
extern void __register_frame_info(const void *fde, void *ob)
__attribute__((unavailable));
LIBUNWIND_AVAIL;
extern void __register_frame_info_table_bases(const void *fde, void *ob,
void *tb, void *db)
__attribute__((unavailable));
LIBUNWIND_AVAIL;
extern void __register_frame_info_table(const void *fde, void *ob)
__attribute__((unavailable));
LIBUNWIND_AVAIL;
extern void __register_frame_table(const void *fde)
__attribute__((unavailable));
LIBUNWIND_AVAIL;
extern void *__deregister_frame_info(const void *fde)
__attribute__((unavailable));
LIBUNWIND_AVAIL;
extern void *__deregister_frame_info_bases(const void *fde)
__attribute__((unavailable));
LIBUNWIND_AVAIL;
#ifdef __cplusplus
}