bpf: ignore missing LLVM bins on package for non compile steps

To download a package the LLVM bins are not strictly needed.
Currently with an example run of make package/bridger/download V=s, the
build fail with

make[2]: Entering directory '/home/ansuel/openwrt-ansuel/openwrt/package/network/services/bridger'
bash: line 1: /home/ansuel/openwrt-ansuel/openwrt/staging_dir/host/llvm-bpf/bin/clang: No such file or directory
bash: line 1: [: : integer expression expected
/home/ansuel/openwrt-ansuel/openwrt/include/bpf.mk:71: *** ERROR: LLVM/clang version too old. Minimum required: 12, found: .  Stop.
make[2]: Leaving directory '/home/ansuel/openwrt-ansuel/openwrt/package/network/services/bridger'
time: package/network/services/bridger/download#0.04#0.00#0.06
    ERROR: package/network/services/bridger failed to build.

This is wrong since it may be needed to download the required packages
first and then compile them later.

Fix this by ignoring the LLVM bin check on non compile steps.

Tested-by: Robert Marko <robimarko@gmail.com>
Signed-off-by: Christian Marangi <ansuelsmth@gmail.com>
(cherry picked from commit 116c73fd71c75e38c4d707dc5a74e6993874098f)

diff --git a/include/bpf.mk b/include/bpf.mk
index e43fcad50ce694aa6ac2a847dde2a8cee560641f..ec3f04e1e9e16994df99738751d84ec21ad64868 100644 (file)
--- a/include/bpf.mk
+++ b/include/bpf.mk
@@ -64,7 +64,7 @@ BPF_CFLAGS := \
        -O2 -emit-llvm -Xclang -disable-llvm-passes
 
 ifneq ($(CONFIG_HAS_BPF_TOOLCHAIN),)
-ifeq ($(DUMP),)
+ifeq ($(DUMP)$(filter download refresh,$(MAKECMDGOALS)),)
   CLANG_VER:=$(shell $(CLANG) -dM -E - < /dev/null | grep __clang_major__ | cut -d' ' -f3)
   CLANG_VER_VALID:=$(shell [ "$(CLANG_VER)" -ge "$(CLANG_MIN_VER)" ] && echo 1 )
   ifeq ($(CLANG_VER_VALID),)