Follow @Openwall on Twitter for new release announcements and other news
[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]
Date: Sat, 6 Feb 2016 10:35:28 -0200
From: Alba Pompeo <>
To: Rich Felker <>
Cc: r-devel <>,
Subject: Re: Fwd: [Rd] strptime() question

It is setting TZ and using tzset(). R is not multi-threaded so it is safe.

Simon figure out the important settings from the config.log and
config.h files on a musl system:

#define HAVE_TM_GMTOFF 1
#define HAVE_TM_ZONE 1

Does this help anyone debug the issue? Simon just went on vacation.

On Thu, Feb 4, 2016 at 7:32 PM, Rich Felker <> wrote:
> On Thu, Feb 04, 2016 at 04:35:22PM -0200, Alba Pompeo wrote:
>> I forwarded our talk on musl mailing list to R mailing list.
>> I got this response.
>> Does it help?
>> Also, what do you think about making a new email that's sent to both
>> musl and R mailing list, that way devs from both projects can
>> communicate? It's a tad inefficient for me to keep forwarding messages
>> like this back and forth.
> I'm cc'ing both lists now.
>> ---------- Forwarded message ----------
>> From: Simon Urbanek <>
>> Date: Thu, Feb 4, 2016 at 3:01 PM
>> Subject: Re: [Rd] [musl] strptime() question
>> To: Alba Pompeo <>
>> Cc: r-devel <>
>> On Feb 4, 2016, at 11:20 AM, Alba Pompeo <> wrote:
>> > There is incompatibility between R strptime and musl libc. I posted
>> > about it on their mailing list, but they need more information I can't
>> > provide, so I'm forwarding the message here in hope R developers can
>> > help. Thanks.
>> Generally, it's using the standard tzset() call to set the time zone
> The tzset function doesn't really do much interesting; it just updates
> some global state to match the current value of the TZ environment
> variable, but most time.h functions do this already anyway. Anyway
> this doesn't really answer the question of what R's strptime function
> is doing to add timezone functionality onto the underlying system's
> strptime. Is R changing the environment (this is highly unsafe in any
> potentially-multithreaded process, BTW)? Is it using the globals set
> by tzset to compute adjustments to the result?
> Rich

Powered by blists - more mailing lists

Confused about mailing lists and their use? Read about mailing lists on Wikipedia and check out these guidelines on proper formatting of your messages.