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cleanup: support CMake >= 3.10 (#1544) 

* cleanup: support CMake >= 3.10

This aligns the project with the CMake support policies in:

https://opensource.google/documentation/policies/cplusplus-support

I also simplied the management of CMake policies. Most of the overriden
policies (anything <= CMP0067) are enabled by default when you require
CMake >= 3.10.  But it is easier to just declare that you will accept
newer policies when they are available using the `...3.22` notation.

* Address review comments

* inlined links

---------

Co-authored-by: dominic <510002+dmah42@users.noreply.github.com>
This commit is contained in:
Carlos O'Ryan 2023-02-17 08:38:53 -05:00 committed by GitHub
parent 1079d96989
commit b111d01c1b
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2 changed files with 10 additions and 28 deletions
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17
CMakeLists.txt
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@ -1,18 +1,5 @@
cmake_minimum_required (VERSION 3.16.3)
foreach(p
CMP0048 # OK to clear PROJECT_VERSION on project()
CMP0054 # CMake 3.1
CMP0056 # export EXE_LINKER_FLAGS to try_run
CMP0057 # Support no if() IN_LIST operator
CMP0063 # Honor visibility properties for all targets
CMP0067 # Honor language standard in try_compile() source file signature
CMP0077 # Allow option() overrides in importing projects
)
if(POLICY ${p})
cmake_policy(SET ${p} NEW)
endif()
endforeach()
# Require CMake 3.10. If available, use the policies up to CMake 3.22.
cmake_minimum_required (VERSION 3.10...3.22)
project (benchmark VERSION 1.7.1 LANGUAGES CXX)

21
docs/dependencies.md
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@ -1,18 +1,13 @@
# Build tool dependency policy
To ensure the broadest compatibility when building the benchmark library, but
still allow forward progress, we require any build tooling to be available for:
We follow the [Foundational C++ support policy](https://opensource.google/documentation/policies/cplusplus-support) for our build tools. In
particular the ["Build Systems" section](https://opensource.google/documentation/policies/cplusplus-support#build-systems).
* Debian stable _and_
* The last two Ubuntu LTS releases
## CMake
Currently, this means using build tool versions that are available for Ubuntu
Ubuntu 20.04 (Focal Fossa), Ubuntu 22.04 (Jammy Jellyfish) and Debian 11.4 (bullseye).
## cmake
The current supported version is cmake 3.16.3 as of 2022-08-10.
* 3.16.3 (ubuntu 20.04)
* 3.18.4 (debian 11.4)
* 3.22.1 (ubuntu 22.04)
The current supported version is CMake 3.10 as of 2023-08-10. Most modern
distributions include newer versions, for example:
* Ubuntu 20.04 provides CMake 3.16.3
* Debian 11.4 provides CMake 3.18.4
* Ubuntu 22.04 provides CMake 3.22.1