From 0f2df2dad59e2f5e6da6144b009184a7f26e33b0 Mon Sep 17 00:00:00 2001
From: Ricardo Wurmus <rekado@elephly.net>
Date: Fri, 7 Nov 2025 17:41:39 +0100
Subject: [PATCH] gnu: Add gloo-for-r-torch.

* gnu/packages/machine-learning.scm (gloo-for-r-torch): New variable.

Change-Id: Ibaf55d20d42acf6379464f7f7484c9ce67197d40
---
 gnu/packages/machine-learning.scm | 47 +++++++++++++++++++++++++++++++
 1 file changed, 47 insertions(+)

diff --git a/gnu/packages/machine-learning.scm b/gnu/packages/machine-learning.scm
index 595204ea5e2c86c2f583185e6ef5884927a29ed1..68ff3c460a4fc35f36ce11e8df6da4bd107962e8 100644
--- a/gnu/packages/machine-learning.scm
+++ b/gnu/packages/machine-learning.scm
@@ -3697,6 +3697,53 @@ These include a barrier, broadcast, and allreduce.")
       (supported-systems %64bit-supported-systems)
       (license license:bsd-3))))
 
+(define-public gloo-for-r-torch
+  (let ((version "0.0.0")                         ; no proper version tag
+        (commit "81925d1c674c34f0dc34dd9a0f2151c1b6f701eb")
+        (revision "2"))
+    (package
+      (name "gloo")
+      (version (git-version version revision commit))
+      (source
+       (origin
+         (method git-fetch)
+         (uri (git-reference
+               (url "https://github.com/facebookincubator/gloo")
+               (commit commit)))
+         (file-name (git-file-name name version))
+         (sha256
+          (base32
+           "16zs8ndbiv9nppn8bv6lfanzyyssz7g5pawxiqcnafwq3nvxpj9m"))))
+      (build-system cmake-build-system)
+      (native-inputs
+       (list googletest))
+      (inputs
+       (append (list openssl-1.1)
+               (if (supported-package? rdma-core)
+                   (list rdma-core)
+                   '())))
+      (arguments
+       (list #:configure-flags #~'("-DBUILD_SHARED_LIBS=ON"
+                                   "-DBUILD_TEST=1"
+                                   "-DCMAKE_CXX_STANDARD=17"
+                                   #$@(if (this-package-input "rdma-core")
+                                          #~("-DUSE_IBVERBS=ON")
+                                          #~()))
+             #:phases
+             #~(modify-phases %standard-phases
+                 (replace 'check
+                   (lambda* (#:key tests? #:allow-other-keys)
+                     (when tests?
+                       (invoke "make" "gloo_test")))))))
+      (synopsis "Collective communications library")
+      (description
+       "Gloo is a collective communications library.  It comes with a
+number of collective algorithms useful for machine learning applications.
+These include a barrier, broadcast, and allreduce.")
+      (home-page "https://github.com/facebookincubator/gloo")
+      (supported-systems %64bit-supported-systems)
+      (license license:bsd-3))))
+
 (define-public python-tensorly
   (package
     (name "python-tensorly")