diff options
Diffstat (limited to 'stdlib/errno.h')
| -rw-r--r-- | stdlib/errno.h | 12 |
1 files changed, 8 insertions, 4 deletions
diff --git a/stdlib/errno.h b/stdlib/errno.h index fe08365e40..c5ba522ac0 100644 --- a/stdlib/errno.h +++ b/stdlib/errno.h @@ -33,8 +33,12 @@ __BEGIN_DECLS +/* This type cues the GDB pretty-printer for errno (errno-printer.py) + to show a symbolic name for the error. */ +typedef int __error_t; + /* The error code set by various library functions. */ -extern int *__errno_location (void) __THROW __attribute_const__; +extern __error_t *__errno_location (void) __THROW __attribute_const__; # define errno (*__errno_location ()) # ifdef __USE_GNU @@ -45,11 +49,11 @@ extern int *__errno_location (void) __THROW __attribute_const__; extern char *program_invocation_name; extern char *program_invocation_short_name; -/* bits/errno.h may have defined this type. If it didn't, provide a - fallback definition. */ +/* User namespace version of __error_t. This is used to make the return + values of certain GNU extension functions more self-documenting. */ # ifndef __error_t_defined # define __error_t_defined 1 -typedef int error_t; +typedef __error_t error_t; # endif # endif /* __USE_GNU */ |