c2ada and hello world

[Jerry]

When I try to get c2ada to convert a hello world, all I get is an empty package body and spec, like this:


with C;
with C.Ops; use C.Ops;

package body Users.me.hello is


end Users.me.hello;

and

package Users.me.hello is


end Users.me.hello;


What am I doing wrong?
Jerry

[Shark8]

On Friday, September 13, 2013 6:30:54 PM UTC-6, Jerry wrote:
> When I try to get c2ada to convert a hello world, all I get is an empty package body and spec
>
>

> What am I doing wrong?

Using C? ;)


But on a serious note it looks like the output is the translation of an empty header/main. Check to ensure that it's reading in the correct file (does it need fully-qualified path?). Also, you might want to look into the documentation regarding any flags you need to use. -- I've never had to use c2ada so can't really help other than these general tips.

[Simon Wright]

Jerry <lance...@qwest.net> writes:

> What am I doing wrong?

I could say (as the last maintainer who did anything much), using c2ada
:-(

It started out as an equivalent of gcc -fdump-ada-spec for headers, and
then someone had the bright idea of getting it to translate .c files as
well; we have no revision history or documentation for this, all we have
is what you see in the SF repo.

It doesn't do too bad a job of headers (though including stdio.h will
generate a lot of output, including here package Sys._Types).

[Per Sandberg]

???
When mixing C(++) and Ada nowadays the way to do it is:
* Get the .h(h) files in order and clean.
* Compile a .c(pp) file only containing the required includes with the
switch "-fdump-ada-spec".
This will produce fairly decent specs (.ads-files) given that the
header-files are decent.

So skip c2ada and use the interfaces produced by a modern gcc.

/Per