[FYI] Include <cmath> in dwarf-index-write.c

[Simon Marchi]

On 2018-03-27 10:56, Tom Tromey wrote:
> On x86-64 Fedora 26, when building with the system gcc, I get:
> 
> ../../binutils-gdb/gdb/dwarf-index-write.c: In member function ‘void
> debug_names::build()’:
> ../../binutils-gdb/gdb/dwarf-index-write.c:705:13: error: ‘pow’ is not
> a member of ‘std’
> 
> There are actually more messages, but this is sufficient to show the
> problem.
> 
> The fix is to include <cmath>.
> 
> I'm checking this in as obvious.  Tested by building.
> 
> gdb/ChangeLog
> 2018-03-27  Tom Tromey  <tom@tromey.com>
> 
> 	* dwarf-index-write.c: Include <cmath>.
> ---
>  gdb/ChangeLog           | 4 ++++
>  gdb/dwarf-index-write.c | 1 +
>  2 files changed, 5 insertions(+)
> 
> diff --git a/gdb/dwarf-index-write.c b/gdb/dwarf-index-write.c
> index 3059e0b776..058712d9e2 100644
> --- a/gdb/dwarf-index-write.c
> +++ b/gdb/dwarf-index-write.c
> @@ -34,6 +34,7 @@
>  #include "psympriv.h"
> 
>  #include <algorithm>
> +#include <cmath>
>  #include <set>
>  #include <unordered_map>
>  #include <unordered_set>

Oops, thanks!