[Issue 22589] New: importC: Error: undefined reference to '__builtin_va_start' and '__builtin_va_end'

[d-bugmail at puremagic.com]

https://issues.dlang.org/show_bug.cgi?id=22589

          Issue ID: 22589
           Summary: importC: Error: undefined reference to
                    '__builtin_va_start' and '__builtin_va_end'
           Product: D
           Version: D2
          Hardware: All
                OS: All
            Status: NEW
          Severity: blocker
          Priority: P1
         Component: dmd
          Assignee: nobody at puremagic.com
          Reporter: ibuclaw at gdcproject.org

Seen when trying to link test/compilable/vastartend.c
---
typedef __builtin_va_list __gnuc_va_list;
typedef __gnuc_va_list va_list;

int gzvprintf(const char *format, va_list va);

int gzprintf(const char *format, ...)
{
    va_list va;
    int ret;

    __builtin_va_start(va,format);
    ret = gzvprintf(format, va);
    __builtin_va_end(va);
    return ret;
}

// Added:
int main() { return 0; }
---

--