Re: Declaring extern(C) declarations with template mixins

[Mathias Lang via Digitalmars-d-learn]

On Tuesday, 12 January 2016 at 21:22:46 UTC, Jacob Carlborg wrote:

Is this supposed to work:

template Foo()
{
    extern(C) int printf(in char*, ...);
}

mixin Foo;

void main()
{
    printf("foo\n");
}

It fails with a linker error, undefined symbol, due to not applying C mangling:

Undefined symbols for architecture x86_64:
  "__D4main8__mixin76printfUxPaYi", referenced from:
      __Dmain in main.o
ld: symbol(s) not found for architecture x86_64

clang: error: linker command failed with exit code 1 (use -v to see invocation)

https://issues.dlang.org/show_bug.cgi?id=12575