Re: Wireshark does not build on Ubunty 18.04 with LZ4 (to old version?)

[Pascal Quantin <pascal () wireshark org>]

Hi Anders,

Le mar. 7 sept. 2021 à 14:33, Anders Broman via Wireshark-dev <
wireshark-dev () wireshark org> a écrit :

> Hi,
>
> Build fails complaining on
>
> wiretap/file_wrappers.c:199:5 error: unknown type name ‘LZ4F_dctx’
>
>
>
> As far as I understand in the older package it uses LZ4F_dctx_s
>
> Should we require a higher version of the LZ4 library?

Rather than requiring a higher version of LZ4 (that is also used by CQL and
Kafka dissectors), I guess we could check the LZ4 version found in
file_wrappers.c. What do you think ?

Cheers,
Pascal.


> Do we need something like this: (
> https://github.com/facebook/hhvm/blob/master/CMake/FindLZ4.cmake)
>
> # fb-mysql requires LZ4F_resetDecompressionContext() which was added in
> v1.8.0
>
> if (LZ4_LIBRARY)
>
>   include(CheckCSourceRuns)
>
>   set(CMAKE_REQUIRED_INCLUDES ${LZ4_INCLUDE_DIR})
>
>   set(CMAKE_REQUIRED_LIBRARIES ${LZ4_LIBRARY})
>
>   check_c_source_runs("
>
> #include <lz4.h>
>
> int main() {
>
>   int good = (LZ4_VERSION_MAJOR > 1) ||
>
>     ((LZ4_VERSION_MAJOR == 1) && (LZ4_VERSION_MINOR >= 8));
>
> return !good;
>
> }" LZ4_GOOD_VERSION)
>
>   set(CMAKE_REQUIRED_INCLUDES)
>
>   set(CMAKE_REQUIRED_LIBRARIES)
>
> endif()
>
>
>
> Best regards
>
> Anders
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