From 76ccfa0a97060a07210511bf8d386343fd595f66 Mon Sep 17 00:00:00 2001
From: Rohit1 Singh <sinrohit@deshaw.com>
Date: Wed, 28 Jan 2026 03:44:57 -0500
Subject: [PATCH] dcgm: fix build with gcc15

---
 pkgs/by-name/dc/dcgm/fix-gcc15.patch | 49 ++++++++++++++++++++++++++++
 pkgs/by-name/dc/dcgm/package.nix     |  4 +++
 2 files changed, 53 insertions(+)
 create mode 100644 pkgs/by-name/dc/dcgm/fix-gcc15.patch

diff --git a/pkgs/by-name/dc/dcgm/fix-gcc15.patch b/pkgs/by-name/dc/dcgm/fix-gcc15.patch
new file mode 100644
index 000000000000..d764ece57c44
--- /dev/null
+++ b/pkgs/by-name/dc/dcgm/fix-gcc15.patch
@@ -0,0 +1,49 @@
+diff --git a/common/CudaLib/mock/CudaLibMock.cpp b/common/CudaLib/mock/CudaLibMock.cpp
+index f79a74b..a3a43e9 100644
+--- a/common/CudaLib/mock/CudaLibMock.cpp
++++ b/common/CudaLib/mock/CudaLibMock.cpp
+@@ -15,6 +15,7 @@
+  */
+ 
+ #include "CudaLibMock.h"
++#include <algorithm>
+ 
+ #include <fmt/format.h>
+ #include <stdexcept>
+diff --git a/common/DcgmStringHelpers.cpp b/common/DcgmStringHelpers.cpp
+index 8bf1f05..5f72267 100644
+--- a/common/DcgmStringHelpers.cpp
++++ b/common/DcgmStringHelpers.cpp
+@@ -14,6 +14,7 @@
+  * limitations under the License.
+  */
+ #include "DcgmStringHelpers.h"
++#include <algorithm>
+ 
+ #include <cstring>
+ #include <set>
+diff --git a/common/EntityListHelpers.cpp b/common/EntityListHelpers.cpp
+index a10bb1b..6f65efa 100644
+--- a/common/EntityListHelpers.cpp
++++ b/common/EntityListHelpers.cpp
+@@ -98,7 +98,7 @@ struct EntityMapTypedIterator
+ 
+     bool operator==(EntityMapTypedIterator const &other) const
+     {
+-        return m_it == other.it;
++        return m_it == other.m_it;
+     }
+ 
+     template <typename Y>
+diff --git a/nvvs/include/IgnoreErrorCodesHelper.h b/nvvs/include/IgnoreErrorCodesHelper.h
+index 4c94581..4e101ea 100644
+--- a/nvvs/include/IgnoreErrorCodesHelper.h
++++ b/nvvs/include/IgnoreErrorCodesHelper.h
+@@ -18,6 +18,7 @@
+ 
+ #include "DcgmGroupEntityPairHelpers.h"
+ #include "DcgmStringHelpers.h"
++#include <optional>
+ 
+ #include <exception>
+ #include <map>
diff --git a/pkgs/by-name/dc/dcgm/package.nix b/pkgs/by-name/dc/dcgm/package.nix
index fd5d36113243..8c823615b1ef 100644
--- a/pkgs/by-name/dc/dcgm/package.nix
+++ b/pkgs/by-name/dc/dcgm/package.nix
@@ -86,6 +86,7 @@ stdenv.mkDerivation {
   patches = [
     ./remove-cuda-11.patch
     ./dynamic-libs.patch
+    ./fix-gcc15.patch
     (replaceVars ./fix-paths.patch {
       inherit coreutils;
       inherit util-linux;
@@ -145,6 +146,9 @@ stdenv.mkDerivation {
     "DcgmModuleSysmon::ReadCoreSpeed"
     "DcgmModuleSysmon::ReadTemperature"
     "Sysmon: initialize module"
+    # Test assumes plugins are installed relative to the binary with a
+    # populated `cudaless/` directory
+    "GetPluginCudalessDir returns cudaless directory in plugin directory"
   ];
 
   # Add our paths to the CMake flags so FindCuda.cmake can find them.