Cmake Set C Version 17

When i ask for c 11 c 14 c 17 i want cmake to set all flags that are needed to make the compiler conform and that includes the value of the cplusplus macro. For compilers that have no notion of a standard level such as microsoft visual c before 2015 update 3 this has no effect. The set cmake cxx flags std c 0x works fine for me so there is probably a problem somewhere else in the cmakelists file.

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Set Compiler Specific Settings And Project Build Location In Eclipse Via Cmake File Stack Overflow

C 11 is supported by cmake.

Cmake set c version 17. This variable is used as the default for the cxx standard target property so all targets defined after the variable is set will pick up the requirement. Visual studio 2019 is supported from cmake 3 14 1 tested generators. Hi is there a way to get cmake 3 11 to emit 17 vs 1y when setting cmake cxx standard. Comicsansms jun 1 12 at 14 11.

Libraries that have workarounds or optional features depending on the c version e g. Originally cmake was designed as a generator for various dialects of makefile today cmake generates modern buildsystems such as ninja as well as project files for ides such as visual studio and xcode. As long as you are using cmake 3 1 or newer you should be fine there are two different ways to enable support. Supported values are 98 11 14 17.

Foo a b in c 17 guarantees a is evaluated before b. And as you ll soon see there s even better support in cmake 3 8. This property specifies the c standard whose features are requested to build this target. A certainly pedantic comment is that i consider this a bug in cmake.

Behaves differently in c 11 and c 14. Defining their own optional when used pre 17 but use std optional if c 17 is available auto x 1. Valid values for cmake cxx standard are 98 11 and 14 with 17 also being added in cmake 3 8 and 20 added in cmake 3 12. I m finding that it seems to be a common practice to use the value of the preprocessor define cplusplus which is a date and the value differs depending on whether 17 or 1y is used at least with clang.

Cmake is a tool to manage building of source code. Msys2 mingw32 gcc 8 3 build visual studio 15 2017 optional. Make sure you don t accidentally overwrite the contents of cmake cxx flags later on. Tobi s may 23 19 at 9 18.

Just not in cmake 2 8 because guess what c 11 didn t exist in 2009 when 2 0 was released. Non standard language options and incomplete feature support are normal for compilers across virtually all programming languages from basic to fortran and here c. 1 13 1 13 we need cmake 2 8 11 at least because we use cmake features target usage requirements and generator toolset selection we need cmake 3 8 at least because we require cmake cxx standard to be set to c 17. For some compilers this results in adding a flag such as std gnu 11 to the compile line.

Cmake builds for modern c 14 c 17 c 20 28 september 2019. Mai 2018 08 00 14 schrieb andrew brownsword. Cmake is widely used for the c and c languages but it may be used to build source code of other languages too.