[openwrt/openwrt] tools: include the value of CONFIG_SDK_LLVM_BPF in the stampfile

[LEDE Commits]

nbd pushed a commit to openwrt/openwrt.git, branch master:
https://git.openwrt.org/848499c1cf2c55adf8f3e0e355caa07234803cbe

commit 848499c1cf2c55adf8f3e0e355caa07234803cbe
Author: Felix Fietkau <nbd at nbd.name>
AuthorDate: Sun Nov 21 12:13:52 2021 +0100

    tools: include the value of CONFIG_SDK_LLVM_BPF in the stampfile
    
    tools/llvm-bpf needs to be checked if the value changes
    
    Signed-off-by: Felix Fietkau <nbd at nbd.name>
---
 tools/Makefile | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/tools/Makefile b/tools/Makefile
index 686d5294d3..82a67a00dd 100644
--- a/tools/Makefile
+++ b/tools/Makefile
@@ -156,7 +156,8 @@ $(curdir)/ := .config prereq
 
 $(curdir)/install: $(curdir)/compile
 
-tools_enabled = $(foreach tool,$(sort $(tools-y) $(tools-)),$(if $(filter $(tool),$(tools-y)),y,n))
+tools_config = CONFIG_SDK_LLVM_BPF
+tools_enabled = $(foreach tool,$(sort $(tools-y) $(tools-)),$(if $(filter $(tool),$(tools-y)),y,n))$(foreach c,$(tools_config),$(if $($(c)),y,n))
 $(eval $(call stampfile,$(curdir),tools,compile,,_$(subst $(space),,$(tools_enabled)),$(STAGING_DIR_HOST)))
 $(eval $(call stampfile,$(curdir),tools,check,$(TMP_DIR)/.build,,$(STAGING_DIR_HOST)))
 $(eval $(call subdir,$(curdir)))