In cmd/regulator.c an error occurs with GCC 9.2.1 if CONFIG_ERRNO_STR is not defined:
cmd/regulator.c: In function ‘failure’: cmd/regulator.c:20:2: error: ‘%s’ directive argument is null [-Werror=format-overflow=] 20 | printf("Error: %d (%s)\n", ret, errno_str(ret)); | ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ In function ‘constraint’, inlined from ‘constraint’ at cmd/regulator.c:111:12: cmd/regulator.c:115:3: error: ‘%s’ directive argument is null [-Werror=format-overflow=] 115 | printf(" %s (err: %d)\n", errno_str(val), val); | ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
errno_str() should return a valid string instead of NULL if CONFIG_ERRNO_STR is not defined.
Signed-off-by: Heinrich Schuchardt xypron.glpk@gmx.de --- include/errno.h | 11 ++++++++++- 1 file changed, 10 insertions(+), 1 deletion(-)
diff --git a/include/errno.h b/include/errno.h index ccb7869e17..3af539b9e9 100644 --- a/include/errno.h +++ b/include/errno.h @@ -12,12 +12,21 @@ extern int errno;
#define __set_errno(val) do { errno = val; } while (0)
+/** + * errno_str() - get description for error number + * + * @errno: error number (negative in case of error) + * Return: string describing the error. If CONFIG_ERRNO_STR is not + * defined an empty string is returned. + */ #ifdef CONFIG_ERRNO_STR const char *errno_str(int errno); #else +static const char error_message[] = ""; + static inline const char *errno_str(int errno) { - return 0; + return error_message; } #endif #endif /* _ERRNO_H */ -- 2.23.0