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D.gnu - gdc --version doesn't indicate which D front-end version it's

reply singingbush <singingbush hotmail.com> writes:
not sure where is best placed for this but on my Fedora system 
running `gdc --version` gives me pretty much the same output as 
`gcc --version`

GDC:

```
$ gdc --version
gdc (GCC) 11.2.1 20211203 (Red Hat 11.2.1-7)
Copyright (C) 2021 Free Software Foundation, Inc.
This is free software; see the source for copying conditions.  
There is NO
warranty; not even for MERCHANTABILITY or FITNESS FOR A 
PARTICULAR PURPOSE.
```

GCC:

```
$ gcc --version
gcc (GCC) 11.2.1 20211203 (Red Hat 11.2.1-7)
Copyright (C) 2021 Free Software Foundation, Inc.
This is free software; see the source for copying conditions.  
There is NO
warranty; not even for MERCHANTABILITY or FITNESS FOR A 
PARTICULAR PURPOSE.
```

It would be far more helpful if running `gdc --version` gave some 
indication of the version of D it's aligned to (which was 2.076 
last time I checked).
Jan 28 2022
next sibling parent reply singingbush <singingbush hotmail.com> writes:
On Friday, 28 January 2022 at 17:42:25 UTC, singingbush wrote:

 not sure where is best placed for this but on my Fedora system 
 running `gdc --version` gives me pretty much the same output as 
 `gcc --version`

 GDC:

 ```
 $ gdc --version
 gdc (GCC) 11.2.1 20211203 (Red Hat 11.2.1-7)
 Copyright (C) 2021 Free Software Foundation, Inc.
 This is free software; see the source for copying conditions.  
 There is NO
 warranty; not even for MERCHANTABILITY or FITNESS FOR A 
 PARTICULAR PURPOSE.
 ```

 GCC:

 ```
 $ gcc --version
 gcc (GCC) 11.2.1 20211203 (Red Hat 11.2.1-7)
 Copyright (C) 2021 Free Software Foundation, Inc.
 This is free software; see the source for copying conditions.  
 There is NO
 warranty; not even for MERCHANTABILITY or FITNESS FOR A 
 PARTICULAR PURPOSE.
 ```

 It would be far more helpful if running `gdc --version` gave 
 some indication of the version of D it's aligned to (which was 
 2.076 last time I checked).


Just seen 
https://forum.dlang.org/thread/nuphsvwkdlygdcxaihwf forum.dlang.org about D
2.098 being in GCC, still can't tell if that's what I have based on the output
though.
Jan 28 2022
parent reply Siarhei Siamashka <siarhei.siamashka gmail.com> writes:
On Friday, 28 January 2022 at 17:45:32 UTC, singingbush wrote:

 It would be far more helpful if running `gdc --version` gave 
 some indication of the version of D it's aligned to (which was 
 2.076 last time I checked).




This would be indeed nice. But so far we have to compile and run 
the following code:

```D
import std.stdio, std.compiler;

void main()
{
   writeln(version_major, ".", version_minor);
}
```

It's ironic that I have exactly the opposite problem. I need to 
check for the backend version from inside of the running program, 
and this isn't easy. I resorted to using this hack:

```D
// GDC11 was the first version to start supporting getTargetInfo 
traits
bool detect_gdc11()
{
   version(GNU) { return __traits(compiles, 
__traits(getTargetInfo, "cppStd")); }
   else return false;
}
```


 Just seen 
 https://forum.dlang.org/thread/nuphsvwkdlygdcxaihwf forum.dlang.org about D
2.098 being in GCC, still can't tell if that's what I have based on the output
though.


It landed in the git repository and is going to be released as 
part of GDC 12.
Jan 28 2022
parent singingbush <singingbush hotmail.com> writes:
Seems I cannot use gdc currently. It turns out that gdc-11.2.1 
(which is the one in Fedora 35 repo) still has D frontend at 
2.076 and I have multiple dependencies that cannot compile with 
that version. Hopefully when GDC 12 lands projects will start 
testing against it in their CI builds.
Jan 28 2022
prev sibling next sibling parent Adam D Ruppe <destructionator gmail.com> writes:
On Friday, 28 January 2022 at 17:42:25 UTC, singingbush wrote:

 It would be far more helpful if running `gdc --version` gave 
 some indication of the version of D it's aligned to (which was 
 2.076 last time I checked).


It is more complicated than that because gdc has a bunch of 
backported things from newer versions too.

You might be best off just trying it and seeing if your code 
works.
Jan 28 2022
prev sibling next sibling parent reply Salih Dincer <salihdb hotmail.com> writes:
On Friday, 28 January 2022 at 17:42:25 UTC, singingbush wrote:

 
 It would be far more helpful if running `gdc --version` gave 
 some indication of the version of D it's aligned to (which was 
 2.076 last time I checked).


It might be a silly question: If the compiler includes old 
version Dlang.  So how about compiling with new version of Phobos 
source files. Will it compile take too long, huh?

One more question but it will be irrelevant: If we leave DMD out 
of the question; other compilers throwing an error when compiling 
with "-version=test1" etc. I guess only DMD supports it?

Thanks...
Jan 30 2022
parent Siarhei Siamashka <siarhei.siamashka gmail.com> writes:
On Sunday, 30 January 2022 at 17:41:21 UTC, Salih Dincer wrote:

 On Friday, 28 January 2022 at 17:42:25 UTC, singingbush wrote:

 
 It would be far more helpful if running `gdc --version` gave 
 some indication of the version of D it's aligned to (which was 
 2.076 last time I checked).


 It might be a silly question: If the compiler includes old 
 version Dlang.  So how about compiling with new version of 
 Phobos source files. Will it compile take too long, huh?


Phobos source files are included in the GDC source tree. 
Compiling GDC (actually GCC with C, C++, Objective C, Fortran, D 
and a bunch of other bells and whistles) takes more than one hour 
on my computer.

```
$ gdc-12.0.1 --version
gdc-12.0.1 (Gentoo 12.0.1, commit 
d1182631ee73f3c7efeb5e70e6caa2da064df984) 12.0.1 20220130 
(experimental)
Copyright (C) 2022 Free Software Foundation, Inc.
This is free software; see the source for copying conditions.  
There is NO
warranty; not even for MERCHANTABILITY or FITNESS FOR A 
PARTICULAR PURPOSE.
```

Just as the message says, it's an experimental build from git. 
Various bugs may be expected in both D frontend and GCC backend. 
But it's good enough as a preview of the new features.

I doubt that compiling the newest Phobos with the old GDC 11 is 
going to work smoothly. If this was the case, then newer Phobos 
would have been already bundled with GDC 11.


 One more question but it will be irrelevant: If we leave DMD 
 out of the question; other compilers throwing an error when 
 compiling with "-version=test1" etc. I guess only DMD supports 
 it?


It's "-fversion=test1" for GDC.
Jan 30 2022
prev sibling parent WebFreak001 <d.forum webfreak.org> writes:
On Friday, 28 January 2022 at 17:42:25 UTC, singingbush wrote:

 not sure where is best placed for this but on my Fedora system 
 running `gdc --version` gives me pretty much the same output as 
 `gcc --version`

 GDC:

 ```
 $ gdc --version
 gdc (GCC) 11.2.1 20211203 (Red Hat 11.2.1-7)
 Copyright (C) 2021 Free Software Foundation, Inc.
 This is free software; see the source for copying conditions.  
 There is NO
 warranty; not even for MERCHANTABILITY or FITNESS FOR A 
 PARTICULAR PURPOSE.
 ```

 GCC:

 ```
 $ gcc --version
 gcc (GCC) 11.2.1 20211203 (Red Hat 11.2.1-7)
 Copyright (C) 2021 Free Software Foundation, Inc.
 This is free software; see the source for copying conditions.  
 There is NO
 warranty; not even for MERCHANTABILITY or FITNESS FOR A 
 PARTICULAR PURPOSE.
 ```

 It would be far more helpful if running `gdc --version` gave 
 some indication of the version of D it's aligned to (which was 
 2.076 last time I checked).


If you want to do this automated you can run

     echo | gdc -xd -fsyntax-only -v -

see how code-d does it: 
https://github.com/Pure-D/code-d/blob/master/src/compilers.ts#L637

Then you can fetch from the output the GCC version, DMD-FE 
version and import paths using these regexes:

```js
const gdcVersionRegex = /^gcc version\s+v?(\d+(?:\.\d+)+)/gm;
const gdcFeVersionRegex = /^version\s+v?(\d+(?:\.\d+)+)/gm;
const gdcImportPathRegex = /^import path\s*\[\d+\]\s*=\s*(.+)/gm;
```
Feb 22 2022