selftests/bpf: fix Makefile for passing LLC to the command line

Makefile has a LLC variable that is initialised to "llc", but can
theoretically be overridden from the command line ("make LLC=llc-6.0").
However, this fails because for LLVM probe check, "llc" is called
directly. Use the $(LLC) variable instead to fix this.

Fixes: 22c8852624fc ("bpf: improve selftests and add tests for meta pointer")
Signed-off-by: Quentin Monnet <[email protected]>
Signed-off-by: Jakub Kicinski <[email protected]>
Signed-off-by: Daniel Borkmann <[email protected]>

diff --git a/tools/testing/selftests/bpf/Makefile b/tools/testing/selftests/bpf/Makefile
index 05fc4e2e7b3a06523cce6adde01fbdf03b8bdac0..9316e648a880db61cad82c399c30218695d7d215 100644 (file)
--- a/tools/testing/selftests/bpf/Makefile
+++ b/tools/testing/selftests/bpf/Makefile
@@ -39,7 +39,7 @@ $(BPFOBJ): force
 CLANG ?= clang
 LLC   ?= llc
 
-PROBE := $(shell llc -march=bpf -mcpu=probe -filetype=null /dev/null 2>&1)
+PROBE := $(shell $(LLC) -march=bpf -mcpu=probe -filetype=null /dev/null 2>&1)
 
 # Let newer LLVM versions transparently probe the kernel for availability
 # of full BPF instruction set.