Patch FAISS for missing Thrust includes (#1398)

This PR patches FAISS for some missing Thrust includes. This is needed to support building with CCCL 3.1.x. RAPIDS 25.10 will still use CCCL 3.0.x but we want to make it possible to build with 3.1.x in 25.10.

xref: #1329 (This backports a fix from that testing PR, which is targeting 25.12)

I am upstreaming the patch here: facebookresearch/faiss#4597

Authors:
  - Bradley Dice (https://github.com/bdice)
  - Corey J. Nolet (https://github.com/cjnolet)

Approvers:
  - Tarang Jain (https://github.com/tarang-jain)
  - Divye Gala (https://github.com/divyegala)

URL: #1398

Author: bdice

cpp/cmake/patches/faiss/fix-missing-includes-for-thrust-copy.patch

@@ -0,0 +1,40 @@
+From 87c5331dfa6ec30fd9839ecb89af519e65f010e7 Mon Sep 17 00:00:00 2001
+From: Bradley Dice <bdice@bradleydice.com>
+Date: Mon, 29 Sep 2025 15:39:17 -0500
+Subject: [PATCH] Fix missing includes for thrust::copy
+
+---
+ faiss/gpu/impl/BinaryCuvsCagra.cu | 3 +++
+ faiss/gpu/impl/CuvsCagra.cu       | 3 +++
+ 2 files changed, 6 insertions(+)
+
+diff --git a/faiss/gpu/impl/BinaryCuvsCagra.cu b/faiss/gpu/impl/BinaryCuvsCagra.cu
+index 0ca21dc5f..b331fdc8f 100644
+--- a/faiss/gpu/impl/BinaryCuvsCagra.cu
++++ b/faiss/gpu/impl/BinaryCuvsCagra.cu
+@@ -32,6 +32,9 @@
+ #include <raft/core/resource/thrust_policy.hpp>
+ #include <raft/linalg/map.cuh>
+
++#include <thrust/copy.h>
++#include <thrust/device_ptr.h>
++
+ namespace faiss {
+ namespace gpu {
+
+diff --git a/faiss/gpu/impl/CuvsCagra.cu b/faiss/gpu/impl/CuvsCagra.cu
+index 9ac4e1c5a..755817f43 100644
+--- a/faiss/gpu/impl/CuvsCagra.cu
++++ b/faiss/gpu/impl/CuvsCagra.cu
+@@ -31,6 +31,9 @@
+ #include <raft/core/device_resources.hpp>
+ #include <raft/core/resource/thrust_policy.hpp>
+
++#include <thrust/copy.h>
++#include <thrust/device_ptr.h>
++
+ namespace faiss {
+ namespace gpu {
+
+--
+2.49.0

cpp/cmake/patches/faiss_override.json

@@ -1,9 +1,16 @@
 {
-    "packages" : {
-      "faiss" : {
-        "version": "1.12.0",
-        "git_url": "https://github.com/facebookresearch/faiss.git",
-        "git_tag": "v1.12.0"
-      }
+  "packages" : {
+    "faiss" : {
+      "version": "1.12.0",
+      "git_url": "https://github.com/facebookresearch/faiss.git",
+      "git_tag": "v1.12.0",
+      "patches" : [
+        {
+          "file" : "${current_json_dir}/faiss/fix-missing-includes-for-thrust-copy.patch",
+          "issue" : "Fix missing Thrust includes. https://github.com/facebookresearch/faiss/pull/4597",
+          "fixed_in" : ""
+        }
+      ]
     }
   }
+}