[bug#40164] Fix for libgccjit

[bug#40164] Fix for libgccjit

[Formbi via Guix-patches via]

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From 51511978f7e41392d9ed4d49f08c7ce154ff18d2 Mon Sep 17 00:00:00 2001
From: Formbi <formbi@protonmail.com>
Date: Sat, 21 Mar 2020 14:10:01 +0100
Subject: [PATCH] fix libgccjit

---
 gnu/packages/gcc.scm | 12 +++++++++++-
 1 file changed, 11 insertions(+), 1 deletion(-)

diff --git a/gnu/packages/gcc.scm b/gnu/packages/gcc.scm
index 08afd80358..2c9a8ba9df 100644
--- a/gnu/packages/gcc.scm
+++ b/gnu/packages/gcc.scm
@@ -716,7 +716,17 @@ as the 'native-search-paths' field."
                (for-each delete-file
                          (find-files (string-append (assoc-ref outputs "out") "/bin")
                                      ".*(c\\+\\+|cpp|g\\+\\+|gcov|gcc|gcc-.*)"))
-               #t))))))))
+               #t))))))
+    (native-search-paths
+     (list (search-path-specification
+            (variable "C_INCLUDE_PATH")
+            (files '("include")))
+           (search-path-specification
+            (variable "CPLUS_INCLUDE_PATH")
+            (files '("include")))
+           (search-path-specification
+            (variable "LIBRARY_PATH")
+            (files '("lib" "lib64" "lib/gcc")))))))
 
 
 (define-public gccgo-4.9
-- 
2.25.0

[bug#40164] information

[Formbi via Guix-patches via]

I forgot to say what it does - it adds «lib/gcc» to the CPATH so that we don't get errors like «ld: cannot find crtbeginS.o: No such file or directory».

[bug#40164] a small correction

[Formbi via Guix-patches via]

it fixes LIBRARY_PATH, not CPATH

[bug#40164] Fix for libgccjit

[Mathieu Othacehe]

Hello Formbi,

> Empty Message

Could you explain what you are trying to fix with this patch?

Thanks,

Mathieu

[bug#40164] Fix for libgccjit

[Ludovic Courtès]

Hello,

Formbi <formbi@protonmail.com> skribis:

> From 51511978f7e41392d9ed4d49f08c7ce154ff18d2 Mon Sep 17 00:00:00 2001
> From: Formbi <formbi@protonmail.com>
> Date: Sat, 21 Mar 2020 14:10:01 +0100
> Subject: [PATCH] fix libgccjit
>
> ---
>  gnu/packages/gcc.scm | 12 +++++++++++-
>  1 file changed, 11 insertions(+), 1 deletion(-)
>
> diff --git a/gnu/packages/gcc.scm b/gnu/packages/gcc.scm
> index 08afd80358..2c9a8ba9df 100644
> --- a/gnu/packages/gcc.scm
> +++ b/gnu/packages/gcc.scm
> @@ -716,7 +716,17 @@ as the 'native-search-paths' field."
>                 (for-each delete-file
>                           (find-files (string-append (assoc-ref outputs "out") "/bin")
>                                       ".*(c\\+\\+|cpp|g\\+\\+|gcov|gcc|gcc-.*)"))
> -               #t))))))))
> +               #t))))))
> +    (native-search-paths
> +     (list (search-path-specification
> +            (variable "C_INCLUDE_PATH")
> +            (files '("include")))
> +           (search-path-specification
> +            (variable "CPLUS_INCLUDE_PATH")
> +            (files '("include")))
> +           (search-path-specification
> +            (variable "LIBRARY_PATH")
> +            (files '("lib" "lib64" "lib/gcc")))))))

I think this has no effect because this ‘native-search-paths’ is already
inherited from ‘gcc-9’, which ‘libgccjit’ inherits from.

Can you confirm?

Mathieu Othacehe <m.othacehe@gmail.com> skribis:

> Could you explain what you are trying to fix with this patch?

From a discussion on IRC, this has to do with the fact that libgccjit
needs all these search paths defined at run time.

Thanks,
Ludo’.

[bug#40164] Fix for libgccjit

[Ludovic Courtès]

Hi,

(+Cc bug.)

Formbi <formbi@protonmail.com> skribis:

>> I think this has no effect because this ‘native-search-paths’ is already
>> inherited from ‘gcc-9’, which ‘libgccjit’ inherits from.
>
> Nope, it does have an effect. I added "lib/gcc" to the original paths (and that was the needed thing).

In that case, could you (1) arrange to write the search path in a way
that reuses (package-native-search-paths gcc-9), and (2) add a comment
explaining why “lib/gcc” is needed (it looks unusual)?

Thanks in advance,
Ludo’.

[bug#40164] Fix for libgccjit

[Maxim Cournoyer]

Hi,

Ludovic Courtès <ludo@gnu.org> writes:

> Hi,
>
> (+Cc bug.)
>
> Formbi <formbi@protonmail.com> skribis:
>
>>> I think this has no effect because this ‘native-search-paths’ is already
>>> inherited from ‘gcc-9’, which ‘libgccjit’ inherits from.
>>
>> Nope, it does have an effect. I added "lib/gcc" to the original paths (and that was the needed thing).
>
> In that case, could you (1) arrange to write the search path in a way
> that reuses (package-native-search-paths gcc-9), and (2) add a comment
> explaining why “lib/gcc” is needed (it looks unusual)?
>
> Thanks in advance,
> Ludo’.

Perhaps the original issue is the one reported/fix with a patch here [0]
?  Formbi, could you share a simple reproducer so that we can test if
the patches resolve it?  It seems it'd be useful to upstream as well (to
have a reproducer).

Thanks!

[0]  https://gcc.gnu.org/legacy-ml/gcc-patches/2019-03/msg01045.html

[bug#40164] Fix for libgccjit

[Maxim Cournoyer]

Hello again,

Maxim Cournoyer <maxim.cournoyer@gmail.com> writes:

> Perhaps the original issue is the one reported/fix with a patch here [0]
> ?  Formbi, could you share a simple reproducer so that we can test if
> the patches resolve it?  It seems it'd be useful to upstream as well (to
> have a reproducer).
>
> Thanks!
>
> [0]  https://gcc.gnu.org/legacy-ml/gcc-patches/2019-03/msg01045.html

Another data point: this seems to be worked around in Nix using the fix
proposed by Formbi:
https://github.com/NixOS/nixpkgs/blob/8a815af4280f3e0d5ff740faa7d489e2b9e36829/pkgs/applications/editors/emacs/generic.nix#L87.

Maxim

[bug#40164] Fix for libgccjit

[Formbi via Guix-patches via]

> I think this has no effect because this ‘native-search-paths’ is already
> inherited from ‘gcc-9’, which ‘libgccjit’ inherits from.

Nope, it does have an effect. I added "lib/gcc" to the original paths (and that was the needed thing).

(sending again because I forgot about the debbugs e-mail)