From fe71ce71edbdb29bbe031b9f8f33bfd1fa55c813 Mon Sep 17 00:00:00 2001 From: Nicklas Larsson Date: Thu, 28 Nov 2024 18:13:50 +0100 Subject: [PATCH] docs: RFC 10 on C++17 minimum standard support (#4566) --- doc/development/rfc/README.md | 2 ++ .../RFC10_cpp_language_standards_support.md | 35 +++++++++++++++++++ 2 files changed, 37 insertions(+) create mode 100644 doc/development/rfc/RFC10_cpp_language_standards_support.md diff --git a/doc/development/rfc/README.md b/doc/development/rfc/README.md index 590be34e169..5ee9ff1d805 100644 --- a/doc/development/rfc/README.md +++ b/doc/development/rfc/README.md @@ -16,6 +16,8 @@ A list of all GRASS GIS RFC documents, with status: - [RFC 7: Language Standards Support](language_standards_support.md) (Adopted) - [RFC 8: Python Language Support](python_language_support.md) (Adopted) - [RFC 9: Version Numbering](version_numbering.md) (Adopted) +- [RFC 10: C++17 Language Standard Support](RFC10_cpp17_language_standards_support.md) + (Adopted) - [RFC X: Release Policy](https://github.com/OSGeo/grass/pull/3673) (Draft) Status values: diff --git a/doc/development/rfc/RFC10_cpp_language_standards_support.md b/doc/development/rfc/RFC10_cpp_language_standards_support.md new file mode 100644 index 00000000000..f913c72b396 --- /dev/null +++ b/doc/development/rfc/RFC10_cpp_language_standards_support.md @@ -0,0 +1,35 @@ +# RFC 10: C++17 Standard Support for GRASS GIS 8.5 + +Author of the first draft: Nicklas Larsson + +Status: Motion passed, 28 November 2024 + +## Summary + +Set a new minimum build requirement for C++ code to support the C++17 standard. This +supersedes the [RFC 7: Language Standards Support](language_standards_support.md) +with respect to C++ standard support. + +## Background + +The RFC 7, which set the minimum supported C++ standard to C++11, was adopted 3.5 +years ago. At that time, although the latest versions of common compilers had +full support for C++17, neither the GRASS GIS code itself nor its dependencies +needed or required it. Now, compilers with full C++17 support are available also +in what may be considered stable or long-term-support systems. +Moreover, important dependencies such as PDAL 2.4 (released in March 2022) and +GDAL 3.9 (May 2024) require C++17 support, and so will the future release of +GEOS 3.14. + +## C++17 standard for GRASS GIS + +The time has come to increase the minimal C++ standard support for GRASS GIS +code to the C++17 standard. This enables the use of new C++17 features, if and when +so is needed or recommended. There is, however, no need to make any immediate +changes to current code. Continuous integration runners already compile in +C++17 mode, making sure nothing will be broken. + +## References on C++17 features and support + +- [Wikipedia](https://en.wikipedia.org/wiki/C%2B%2B17) +- [cppreference.com](https://en.cppreference.com/w/cpp/17)