[Buildroot] [PATCH v2] package/cvs: fix mktime related compile failure

Thomas Petazzoni thomas.petazzoni at bootlin.com
Thu Aug 13 21:36:51 UTC 2020


On Thu, 28 May 2020 23:59:12 +0200
Peter Seiderer <ps.report at gmx.net> wrote:

> Use ac_cv_func_working_mktime=yes to force the use of a provided
> mktime implementation instead of compiling the failing own one.
> 
> Fixes:
> 
>   http://autobuild.buildroot.net/results/5bcd8f4235002da682cc900f866116d2fe87f1c8
> 
>   mktime.c: In function 'ydhms_diff':
>   mktime.c:106:52: error: size of array 'a' is negative
>    #define verify(name, assertion) struct name { char a[(assertion) ? 1 : -1]; }
>                                                       ^
>   mktime.c:170:3: note: in expansion of macro 'verify'
>      verify (long_int_year_and_yday_are_wide_enough,
>      ^~~~~~
> 
> with the failure/assert comming from the lines:
> 
>   verify (long_int_year_and_yday_are_wide_enough,
>           INT_MAX <= LONG_MAX / 2 || TIME_T_MAX <= UINT_MAX);
> 
> which fails since the y2038 time_t conversion from 32bit to 64bit
> (musl libc).
> 
> Signed-off-by: Peter Seiderer <ps.report at gmx.net>
> ---
> Changes v1 -> v2:
>   - enhance commit log (as suggested by Thomas Petazzoni)
> ---
>  package/cvs/cvs.mk | 4 +++-
>  1 file changed, 3 insertions(+), 1 deletion(-)

Applied to master, thanks.

Thomas
-- 
Thomas Petazzoni, CTO, Bootlin
Embedded Linux and Kernel engineering
https://bootlin.com


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