-fdump-ada-spec: "FILE" not declared

-fdump-ada-spec: "FILE" not declared

[hreba]

Hi,
I am trying to generate Ada bindings for the GSL (Gnu Scientific 
Library) odeiv2 package (ordinary differential equations). So I do the 
following 2 steps:
1. Go to an empty directory "src" and execute
    g++ -c -fdump-ada-spec -C /usr/include/gsl/gsl_odeiv2.h
2. Go to an empty directory "obj" and execute
    gcc -c -gnat05 ../src/*.ads
Unfortunately, gsl_odeiv2.h includes stdio.h, and this leads to a series 
of errors like

stdio_h.ads:117:69: "FILE" not declared in
	"x86_64_linux_gnu_bits_types_FILE_h"
-- 
Frank Hrebabetzky, Kronach	+49 / 9261 / 950 0565

Re: -fdump-ada-spec: "FILE" not declared

[hreba]

On 2020-04-07 19:10, hreba wrote:
> Hi,
> I am trying to generate Ada bindings for the GSL (Gnu Scientific 
> Library) odeiv2 package (ordinary differential equations). So I do the 
> following 2 steps:
> 1. Go to an empty directory "src" and execute
>     g++ -c -fdump-ada-spec -C /usr/include/gsl/gsl_odeiv2.h
> 2. Go to an empty directory "obj" and execute
>     gcc -c -gnat05 ../src/*.ads
> Unfortunately, gsl_odeiv2.h includes stdio.h, and this leads to a series 
> of errors like
> 
> stdio_h.ads:117:69: "FILE" not declared in
>      "x86_64_linux_gnu_bits_types_FILE_h"

Excuse me, only part of the message was transmitted. Continuing:

"FILE" _is_ declared. stdio.h includes <bits/types/FILE.h>, the complete 
content of which is

---------------------------------------------------------------------
#ifndef __FILE_defined
#define __FILE_defined 1

struct _IO_FILE;

/* The opaque type of streams.  This is the definition used elsewhere.  */
typedef struct _IO_FILE FILE;

#endif
----------------------------------------------------------------------

The definition of _IO_FILE I found in
	/usr/include/x86_64-linux-gnu/bits/libio.h
but when I include this additionally, I get
  # error "Never include <bits/libio.h> directly; use <stdio.h> instead."

Any idea?
-- 
Frank Hrebabetzky, Kronach	+49 / 9261 / 950 0565

Re: -fdump-ada-spec: "FILE" not declared

[Per Sandberg]

Hi
I recalled that i played with it some years ago so i just push:ed my 
play to github.

Have a look on:
	https://github.com/Ada-bindings-project/ada-gsl

/P


On 4/7/20 7:10 PM, hreba wrote:
> Hi,
> I am trying to generate Ada bindings for the GSL (Gnu Scientific 
> Library) odeiv2 package (ordinary differential equations). So I do the 
> following 2 steps:
> 1. Go to an empty directory "src" and execute
>     g++ -c -fdump-ada-spec -C /usr/include/gsl/gsl_odeiv2.h
> 2. Go to an empty directory "obj" and execute
>     gcc -c -gnat05 ../src/*.ads
> Unfortunately, gsl_odeiv2.h includes stdio.h, and this leads to a series 
> of errors like
> 
> stdio_h.ads:117:69: "FILE" not declared in
>      "x86_64_linux_gnu_bits_types_FILE_h"

Re: -fdump-ada-spec: "FILE" not declared

[hreba]

On 2020-04-07 21:29, Per Sandberg wrote:
> Hi
> I recalled that i played with it some years ago so i just push:ed my 
> play to github.
> 
> Have a look on:
>      https://github.com/Ada-bindings-project/ada-gsl
> 
> /P

Ok,
As soon as I have something useful ...

-- 
Frank Hrebabetzky, Kronach	+49 / 9261 / 950 0565

Re: -fdump-ada-spec: "FILE" not declared

[hreba]

Just to let you know that the problem has been solved after a hint on 
stackoverflow: using -fdump-ada-spec-slim instead of -fdup-ada-spec one 
gets only the Ada bindings of that .h file one asked for, and not those 
of all included header files (recursively). Then one manually adds the 
header files which one really needs. No need for a declaration of FILE 
anymore.
-- 
Frank Hrebabetzky, Kronach	+49 / 9261 / 950 0565

Re: -fdump-ada-spec: "FILE" not declared

[hreba]

On 4/11/20 7:01 PM, hreba wrote:
> Just to let you know that the problem has been solved after a hint on 
> stackoverflow: using -fdump-ada-spec-slim instead of -fdup-ada-spec one 
> gets only the Ada bindings of that .h file one asked for, and not those 
> of all included header files (recursively). Then one manually adds the 
> header files which one really needs. No need for a declaration of FILE 
> anymore.

The problem appeared again with other C files, but this time I found the 
solution on the web. From Interfaces.C_Streams:

   subtype FILEs is System.Address;
   -- Corresponds to the C type FILE*
-- 
Frank Hrebabetzky, Kronach	+49 / 9261 / 950 0565

Re: -fdump-ada-spec: "FILE" not declared

[Luke A. Guest]

On 07/04/2020 18:10, hreba wrote:
> Hi,
> I am trying to generate Ada bindings for the GSL (Gnu Scientific
> Library) odeiv2 package (ordinary differential equations). So I do the
> following 2 steps:
> 1. Go to an empty directory "src" and execute
>    g++ -c -fdump-ada-spec -C /usr/include/gsl/gsl_odeiv2.h
> 2. Go to an empty directory "obj" and execute
>    gcc -c -gnat05 ../src/*.ads
> Unfortunately, gsl_odeiv2.h includes stdio.h, and this leads to a series
> of errors like
> 
> stdio_h.ads:117:69: "FILE" not declared in
>     "x86_64_linux_gnu_bits_types_FILE_h"

It's best to use the slim variant of that option, then go in and hand
massage the generated code to be "nice" and not the mess you get.

Luke.

Re: -fdump-ada-spec: "FILE" not declared

[Per Sandberg]

Just as a note
"play" means that all generated specs compiles (this is the trivial 
part) and that there  are some high level bindings (the tricky part) 
that are in their infancy.
/P

On 4/8/20 6:13 PM, hreba wrote:
> On 2020-04-07 21:29, Per Sandberg wrote:
>> Hi
>> I recalled that i played with it some years ago so i just push:ed my 
>> play to github.
>>
>> Have a look on:
>>      https://github.com/Ada-bindings-project/ada-gsl
>>
>> /P
> 
> Ok,
> As soon as I have something useful ...
>