From 0e292978fc112587f67654eed667b66912d4b6f4 Mon Sep 17 00:00:00 2001
From: Luca Toniolo <10792599+grandixximo@users.noreply.github.com>
Date: Tue, 19 May 2026 13:23:45 +0800
Subject: [PATCH] axis: link _togl with -lGL (partially addresses #4034)

_toglmodule.c calls raw GLX functions directly; libepoxy only provides
runtime dispatch, not link-time GLX symbols. Without -lGL the resulting
_togl.so has unresolved glX* symbols and fails to import on aarch64,
where the transitive libepoxy -> libGL chain does not apply as it does
on x86_64.

Fixes the 'undefined symbol: glXDestroyContext' ImportError reported in
#4034. Does not fix the AXIS segfault, which appears to originate in
the UTM virgl/ANGLE GL stack on Apple Silicon and is unrelated.

Backport of the togl hunk from ceed26dc72.
---
 src/emc/usr_intf/axis/Submakefile | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/src/emc/usr_intf/axis/Submakefile b/src/emc/usr_intf/axis/Submakefile
index 72e590a959d..1d433fb14fd 100644
--- a/src/emc/usr_intf/axis/Submakefile
+++ b/src/emc/usr_intf/axis/Submakefile
@@ -17,7 +17,7 @@ $(EMCMODULE): $(call TOOBJS, $(EMCMODULESRCS)) ../lib/liblinuxcnc.a ../lib/libnm
 
 $(TOGLMODULE): $(call TOOBJS, $(TOGLMODULESRCS))
 	$(ECHO) Linking python module $(notdir $@)
-	$(Q)$(CC) $(LDFLAGS) -shared -o $@ $(TCL_CFLAGS) $^ -L/usr/X11R6/lib -lX11 -lepoxy -lXmu $(TCL_LIBS)
+	$(Q)$(CC) $(LDFLAGS) -shared -o $@ $(TCL_CFLAGS) $^ -L/usr/X11R6/lib -lX11 -lepoxy -lGL -lXmu $(TCL_LIBS)
 
 PYTARGETS += $(EMCMODULE) $(TOGLMODULE)