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digitalmars.D.bugs - [Issue 21974] New: importC: Error: undefined identifier

https://issues.dlang.org/show_bug.cgi?id=21974

          Issue ID: 21974
           Summary: importC: Error: undefined identifier
                    '__builtin_va_list'
           Product: D
           Version: D2
          Hardware: All
                OS: All
            Status: NEW
          Severity: normal
          Priority: P1
         Component: dmd
          Assignee: nobody puremagic.com
          Reporter: ibuclaw gdcproject.org

On C compilers, the library never defines the va_list type itself, the compiler
always provides the full definition.

In D, we already generate the va_list type internally (Target.tvalist), this
can be exposed to importC as a `__builtin_valist` keyword to support stdio.h
and stdarg.h, which have these definitions:
---
typedef __builtin_va_list va_list;
typedef __builtin_va_list __gnuc_va_list;
---

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May 25