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Re: Update timezone code from tzcode 2017b

On 06/16/2017 06:45 PM, Joseph Myers wrote:
On Fri, 16 Jun 2017, Stan Shebs wrote:

On Thu, Jun 15, 2017 at 5:32 PM, Joseph Myers <> wrote:

This patch updates files coming from tzcode to the versions in tzcode

So this blows up for me compiling with GCC 4.8.4 (yes yes I know, it's
what Google makes me use), which doesn't like the _Generic in

Does it make sense to try to borrow the __HAVE_GENERIC_SELECTION added
for float128, or is this more of a sign to start requiring 4.9 as the

We don't want to have local changes to the files from tzcode.  Presumably
this is from the -std=gnu11, which sets __STDC_VERSION__ but was
incomplete in GCC 4.8.  I think requiring GCC >= 4.9 and binutils >= 2.25
(the latter given internal linker errors on x86 with 2.24) is reasonable
for building glibc.

As information:
I've also run into the same issue with _Generic on s390 with GCC 4.8.5.
Do you propose a patch which adds such a configure check?


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