What warnings are included in Clang's -Wall and -Wextra?

Question

I\'ve found Clang\'s documentation to be quite poor. I haven\'t been able to find much of a list of available Clang warning flags. I\'m interested particularly in C/C++ warn

Answer 1

You can check the source code:

For example,

def : DiagGroup<"all", [Most, Parentheses, Switch]>;

// Warnings enabled by -pedantic.  This is magically filled in by TableGen.
def Pedantic : DiagGroup<"pedantic">;

// Aliases.
def : DiagGroup<"", [Extra]>;                   // -W = -Wextra

For -Wall look at the Most, Parentheses, Switch. You can find:

def Most : DiagGroup<"most", [ 
....

further down the file. Similarly, for extra:

def Extra : DiagGroup<"extra", [
    MissingFieldInitializers,
    IgnoredQualifiers,
    InitializerOverrides,
    SemiBeforeMethodBody,
    MissingMethodReturnType,
    SignCompare,
    UnusedParameter
  ]>;