[cfe-dev] How to disable the generation of TypedefDecl for __builtin_va_list

[Chengnian Sun via cfe-dev]

Hi,

I found out that for the following code (only containing two variable
declarations), clang will generate three internal typedef declarations. Is
there any way to disable the generation of the three typedef?

Thank you.


======================================


bash-3.2$ cat t.c

int a, b = 1;


bash-3.2$ clang -Xclang -ast-dump -fsyntax-only t.c

*TranslationUnitDecl* 0x10302acc0 <<invalid sloc>> <invalid sloc>

|-*TypedefDecl* 0x10302b1c0 <<invalid sloc>> <invalid sloc> implicit*
__int128_t* '__int128'

|-*TypedefDecl* 0x10302b220 <<invalid sloc>> <invalid sloc> implicit*
__uint128_t* 'unsigned __int128'

|-*TypedefDecl* 0x10302b5b0 <<invalid sloc>> <invalid sloc> implicit*
__builtin_va_list* '__va_list_tag [1]'

|-*VarDecl* 0x10302b610 <t.c:1:1, col:5> col:5* a* 'int'

`-*VarDecl* 0x10302b680 <col:1, col:12> col:8* b* 'int' cinit

  `-*IntegerLiteral* 0x10302b6e0 <col:12> 'int'* 1*



-- 
Best Regards.

Chengnian SUN.
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