Am Thu, 22 Oct 2020 10:20:49 -0400 schrieb Scott Kostyshak <skost...@lyx.org>:
> On Thu, Oct 22, 2020 at 01:23:51PM +0200, Kornel Benko wrote:
> > commit d954a6b09cc9d284a34510f076c16f22b425ead2
> > Author: Kornel Benko <kor...@lyx.org>
> > Date: Thu Oct 22 13:46:29 2020 +0200
> >
> > Cmake build: Next try to use of '--std=c++17' for gnu compiler"
> >
> > Setting CMAKE_CXX_STANDARD explicitly, so that cmake can use
> > correct cxx-flags
> > ---
>
> I get errors (although now at least it says '17' instead of '20' so that's
> progress):
>
> CMake Error at src/CMakeLists.txt:113 (add_executable):
> CXX_STANDARD is set to invalid value '17'
>
>
> CMake Error at src/frontends/CMakeLists.txt:18 (add_library):
> CXX_STANDARD is set to invalid value '17'
>
>
> CMake Error at src/frontends/qt/CMakeLists.txt:42 (add_library):
> CXX_STANDARD is set to invalid value '17'
>
>
> CMake Error at src/frontends/tests/CMakeLists.txt:10 (add_executable):
> CXX_STANDARD is set to invalid value '17':
>
> g++ --version
> g++ (Ubuntu 5.4.0-6ubuntu1~16.04.12) 5.4.0 20160609
>
> I don't use this system much so if that GCC version is too old, then I'm
> fine if we do not support it. But if we dream that someday Pavel will
> switch to CMake, we should be ready :)
>
> Scott
This is cmake message only. What is your cmake version?
Apparently '17' is enabled with version 3.8, and '20' with version 3.12
Kornel
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