From 25c77c56642204828310f044ac6ffe5c970c4079 Mon Sep 17 00:00:00 2001
From: henrygd <hank@henrygd.me>
Date: Wed, 11 Feb 2026 13:49:29 -0500
Subject: [PATCH] make: auto-apply glibc tag for agent on linux/amd64 glibc

---
 Makefile | 40 +++++++++++++++++++++++++++++++++++++---
 1 file changed, 37 insertions(+), 3 deletions(-)

diff --git a/Makefile b/Makefile
index 4d55c5ba..f072fe30 100644
--- a/Makefile
+++ b/Makefile
@@ -3,6 +3,40 @@ OS ?= $(shell go env GOOS)
 ARCH ?= $(shell go env GOARCH)
 # Skip building the web UI if true
 SKIP_WEB ?= false
+# Controls NVML/glibc agent build tag behavior:
+# - auto (default): enable on linux/amd64 glibc hosts
+# - true: always enable
+# - false: always disable
+NVML ?= auto
+
+# Detect glibc host for local linux/amd64 builds.
+HOST_GLIBC := $(shell \
+	if [ "$(OS)" = "linux" ] && [ "$(ARCH)" = "amd64" ]; then \
+		for p in /lib64/ld-linux-x86-64.so.2 /lib/x86_64-linux-gnu/ld-linux-x86-64.so.2 /lib/ld-linux-x86-64.so.2; do \
+			[ -e "$$p" ] && { echo true; exit 0; }; \
+		done; \
+		if command -v ldd >/dev/null 2>&1; then \
+			if ldd --version 2>&1 | tr '[:upper:]' '[:lower:]' | awk '/gnu libc|glibc/{found=1} END{exit !found}'; then \
+				echo true; \
+			else \
+				echo false; \
+			fi; \
+		else \
+			echo false; \
+		fi; \
+	else \
+		echo false; \
+	fi)
+
+# Enable glibc build tag for NVML on supported Linux builds.
+AGENT_GO_TAGS :=
+ifeq ($(NVML),true)
+AGENT_GO_TAGS := -tags glibc
+else ifeq ($(NVML),auto)
+ifeq ($(HOST_GLIBC),true)
+AGENT_GO_TAGS := -tags glibc
+endif
+endif
 
 # Set executable extension based on target OS
 EXE_EXT := $(if $(filter windows,$(OS)),.exe,)
@@ -54,7 +88,7 @@ fetch-smartctl-conditional:
 
 # Update build-agent to include conditional .NET build
 build-agent: tidy build-dotnet-conditional fetch-smartctl-conditional
-	GOOS=$(OS) GOARCH=$(ARCH) go build -o ./build/beszel-agent_$(OS)_$(ARCH)$(EXE_EXT) -ldflags "-w -s" ./internal/cmd/agent
+	GOOS=$(OS) GOARCH=$(ARCH) go build $(AGENT_GO_TAGS) -o ./build/beszel-agent_$(OS)_$(ARCH)$(EXE_EXT) -ldflags "-w -s" ./internal/cmd/agent
 
 build-hub: tidy $(if $(filter false,$(SKIP_WEB)),build-web-ui)
 	GOOS=$(OS) GOARCH=$(ARCH) go build -o ./build/beszel_$(OS)_$(ARCH)$(EXE_EXT) -ldflags "-w -s" ./internal/cmd/hub
@@ -90,9 +124,9 @@ dev-hub:
 
 dev-agent:
 	@if command -v entr >/dev/null 2>&1; then \
-		find ./internal/cmd/agent/*.go ./agent/*.go | entr -r go run github.com/henrygd/beszel/internal/cmd/agent; \
+		find ./internal/cmd/agent/*.go ./agent/*.go | entr -r go run $(AGENT_GO_TAGS) github.com/henrygd/beszel/internal/cmd/agent; \
 	else \
-		go run github.com/henrygd/beszel/internal/cmd/agent; \
+		go run $(AGENT_GO_TAGS) github.com/henrygd/beszel/internal/cmd/agent; \
 	fi
 	
 build-dotnet: