[Kst] Compiling problem on Mac "Thread-local storage"

[Peter Kümmel]

On 03.01.2014 22:11, Barth Netterfield wrote:
> On January 2, 2014 2:52:35 PM Nicholas Chapman wrote:
>> Hi, just now I did a "git pull" to get the latest KST, then attempted
>> to build it.  I get the following error message:
>>
>> In file included from
>> /Users/chapman/data1/Applications/kst/src/datasources/ascii/asciisource.cpp:
>> 22:
>> /Users/chapman/data1/Applications/kst/src/datasources/ascii/kst_atof.h:63:
>> error: thread-local storage not supported for this target
>> make[2]: ***
>> [src/datasources/CMakeFiles/kst2_datasource_ascii.dir/Users/chapman/data1/A
>> pplications/kst/src/datasources/ascii/asciisource.cpp.o] Error 1
>> make[1]: *** [src/datasources/CMakeFiles/kst2_datasource_ascii.dir/all]
>> Error 2 make: *** [all] Error 2
>> 14:47:25: The process "/usr/bin/make" exited with code 2.
>> Error while building/deploying project Kst (kit: Desktop)
>>
>> It looks like it is complaining about line 63 of
>> kst/src/datasources/ascii/kst_atof.h:
>> static KST_THREAD_LOCAL double _previousValue;
>
> Ooohh..  Yikes.
>
> It looks like __thread isn't supported in clang on Mac - at least for your
> compiler version.  (but it is on linux?)
>
> Maybe try with gcc, which apparently 'fakes' it so it works?

I thought this was a gcc error message. ;)

>
> Peter - can you suggest a mac/clang fix?
>
>

I assume more recent clang versions support TLS (isn't TLS part of C++11?)
On systems without TLS support in gcc and clang I would just disable the
"last value" feature for NaN values in ascii data, only there TLS is needed.

Ideally cmake checks if TLS is available.

Peter