02/11/2018 09:11, Jerin Jacob:
> errno_autotest testcase were failed since
> commit 5d7b673d5fd6 ("mk: build with _GNU_SOURCE defined by default")
> RTE>>errno_autotest
> rte_strerror: 'Unknown error 11',
> strerror: 'Resource temporarily unavailable'
> Test Failed
>
> There are two different version of strerror_t() based on
> _GNU_SOURCE definition.
>
> /* XSI-compliant */
> int strerror_r(int errnum, char *buf, size_t buflen);
>
> /* GNU-specific */
> char *strerror_r(int errnum, char *buf, size_t buflen);
>
> Since the GNU-specific version returns char* the exiting "if"
> condition around the strerror_r fails.
>
> Switching back to XSI-compliant version to allow
>
> a) Portable strerror_r() usage as musl c library uses
> non GNU speficic version
> https://git.musl-libc.org/cgit/musl/tree/src/string/strerror_r.c
>
> b) Based on strerror_r(3) man page, it is possible that GNU-specific
> version need not use char *buf to fill error message instead it
> can use the immutable static string from the library and return it.
>
> note from strerror_r(3) man page:
>
> The GNU-specific strerror_r() returns a pointer to a string containing
> the error message. This may be either a pointer to a string that the
> function stores in buf, or a pointer to some (immutable)
> static string (in which case buf is unused).
>
> Fixes: 5d7b673d5fd6 ("mk: build with _GNU_SOURCE defined by default")
>
> Signed-off-by: Jerin Jacob <jerin.ja...@caviumnetworks.com>
You may be interested by this patch from Ferruh:
https://patches.dpdk.org/patch/47622/
