Extra Clang Tools 11.0.0 (In-Progress) Release Notes¶

Introduction
What’s New in Extra Clang Tools 11.0.0?

Written by the LLVM Team

Warning

These are in-progress notes for the upcoming Extra Clang Tools 11 release. Release notes for previous releases can be found on the Download Page.

Introduction ¶

This document contains the release notes for the Extra Clang Tools, part of the Clang release 11.0.0. Here we describe the status of the Extra Clang Tools in some detail, including major improvements from the previous release and new feature work. All LLVM releases may be downloaded from the LLVM releases web site.

For more information about Clang or LLVM, including information about the latest release, please see the Clang Web Site or the LLVM Web Site.

Note that if you are reading this file from a Git checkout or the main Clang web page, this document applies to the next release, not the current one. To see the release notes for a specific release, please see the releases page.

New module llvmlibc.

This module contains checks related to the LLVM-libc coding standards.

New checks ¶

New cppcoreguidelines-avoid-non-const-global-variables check. Finds non-const global variables as described in check I.2 of C++ Core Guidelines.
New bugprone-misplaced-pointer-arithmetic-in-alloc check.

Finds cases where an integer expression is added to or subtracted from the result of a memory allocation function (malloc(), calloc(), realloc(), alloca()) instead of its argument.
New bugprone-spuriously-wake-up-functions check.

Finds cnd_wait, cnd_timedwait, wait, wait_for, or wait_until function calls when the function is not invoked from a loop that checks whether a condition predicate holds or the function has a condition parameter.
New bugprone-reserved-identifier check.

Checks for usages of identifiers reserved for use by the implementation.
New bugprone-suspicious-include check.

Finds cases where an include refers to what appears to be an implementation file, which often leads to hard-to-track-down ODR violations, and diagnoses them.
New cert-oop57-cpp check.

Flags use of the C standard library functions memset, memcpy and memcmp and similar derivatives on non-trivial types.
New llvmlibc-implementation-in-namespace check.

Checks all llvm-libc implementation is within the correct namespace.
New llvmlibc-restrict-system-libc-headers check.

Finds includes of system libc headers not provided by the compiler within llvm-libc implementations.
New objc-dealloc-in-category check.

Finds implementations of -dealloc in Objective-C categories.
New misc-no-recursion check.

Finds recursive functions and diagnoses them.

New check aliases ¶

New alias cert-con36-c to bugprone-spuriously-wake-up-functions was added.
New alias cert-con54-cpp to bugprone-spuriously-wake-up-functions was added.
New alias cert-dcl37-c to bugprone-reserved-identifier was added.
New alias cert-dcl51-cpp to bugprone-reserved-identifier was added.

Changes in existing checks ¶

Improved readability-qualified-auto check now supports a AddConstToQualified to enable adding const qualifiers to variables typed with auto * and auto &.
Improved readability-redundant-string-init check now supports a StringNames option enabling its application to custom string classes. The check now detects in class initializers and constructor initializers which are deemed to be redundant.
Checks supporting the HeaderFileExtensions flag now support ; as a delimiter in addition to ,, with the latter being deprecated as of this release. This simplifies how one specifies the options on the command line: --config="{CheckOptions: [{ key: HeaderFileExtensions, value: h;;hpp;hxx }]}"

Renamed checks ¶

The ‘fuchsia-restrict-system-headers’ check was renamed to portability-restrict-system-includes

Extra Clang Tools 11 documentation