CODEWITHSUNDEEP
clangwarnings
Andrew
Andrew

Reputation: 573

Full Clang warning list with descriptions

I need to get full Clang warnings list. With Descriptions. For iOS. I've seen just a list of warnings here Clang Warnings

But there is no description. Is there any place where i can get full list of Clang warnings with the description?

Upvotes: 10

Views: 16294

Answers (3)

hagi
hagi

Reputation: 11823

(Note: This answer is now outdated.)

There's a neat project that shows the flags alongside their warning messages:

https://github.com/NSHipster/fuckingclangwarnings.com

While these are not comprehensive explanations in all cases, it is very helpful, especially when you want to switch off specific warnings.

The project hasn't been updated in a while and is probably missing a few new warnings. You could also dive into Clang's source code. I haven't worked with it in a while, but I can tell you where to start:

  1. Clone the Clang repository

  2. Browse to /include/clang/Basic/Diagnostic.td. This file includes a couple of other .td files which contain the various warnings, though I'm not sure if all of them are publicly available, and I think their external names are prefixed, depending on their category. I suggest searching for a known warning (or its description) to solve the puzzle.

  3. Another interesting file is /include/clang/Driver/Options.td, which includes the texts you get using the help command, if I recall correctly.

Upvotes: 12

Enji
Enji

Reputation: 21

The [current] accepted answer is correct. clang/clang++'s documentation up on the website doesn't necessarily reflect the supported options in the code. As the old phrase goes, "the source code is the documentation" :/..

One thing that will help with finding options is grepping the source code for DiagGroup. For example, the following demonstrates an attempt at grepping for sign-compare, aka -Wsign-compare, using a pared down clang 7.0.1 source checkout:

$ grep --include \*.td -r sign-compare . | grep DiagGroup
tools/clang/include/clang/Basic/DiagnosticGroups.td:def SignCompare : DiagGroup<"sign-compare">;

Upvotes: 1

murfito
murfito

Reputation: 201

I realize this is an old question, but a complete list of warnings, along with the text printed for each one, can be found in the Clang Documentation.

Upvotes: 18

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