ImportC Rox

[confuzzled]

On Monday, 7 November 2022 at 22:05:38 UTC, Walter Bright wrote:
> https://news.ycombinator.com/item?id=33509223

So I read the responses to this post along with the [ImportC 
documentation](https://dlang.org/spec/importc.html) and was 
excited to try this out. I first copied hello.c from the docs and 
attempted to compile it with dmd. The result:

```
dmd hello.c
hello.c(1): Error: C preprocessor directive `#include` is not 
supported
hello.c(1): Error: no type for declarator before `#`
hello.c(5): Error: no type for declarator before `return`
hello.c(6): Error: no type for declarator before `}`
```
Hmm... that didn't work. No idea how to fix that either. Let me 
try the next example. Output:

```
dmd demo.d square.c
demo.d(6): Error: function expected before `()`, not `module 
square` of type `void`
```
That didn't work either. But if I replace the call to square() on 
line 6 with square.square(), it works fine.

Now, let's try an actual library. First clone xlsxio from github 
and run ```cd xlsxio; make install```. Next create demo.d:

```d
import xlsxio_read;

void main()
{

}
```

and compile it (I copied the header file into the root project 
directory):

```d
dmd demo.d xlsxio_read.h libxlsxio_read.a
Error: unrecognized file extension h
```
Hmmm... What am I missing?

Thanks,
confuzzled!!!