From 340c2ed2ef6578483f974e274bf6d638f953a246 Mon Sep 17 00:00:00 2001
From: Felix Fietkau <nbd@nbd.name>
Date: Mon, 22 Nov 2021 01:43:43 -0800
Subject: [PATCH] tools/llvm-bpf: move tarball packing to target/llvm-bpf

This ensures that the tarball is regenerated after make clean or after switching
to a different target

Signed-off-by: Felix Fietkau <nbd@nbd.name>
---
 target/Makefile          |  9 +++++++--
 target/llvm-bpf/Makefile | 29 +++++++++++++++++++++++++++++
 tools/Makefile           |  3 +--
 tools/llvm-bpf/Makefile  | 14 ++------------
 4 files changed, 39 insertions(+), 16 deletions(-)
 create mode 100644 target/llvm-bpf/Makefile

diff --git a/target/Makefile b/target/Makefile
index 7ad26c7177..83f9c4b093 100644
--- a/target/Makefile
+++ b/target/Makefile
@@ -7,9 +7,14 @@
 curdir:=target
 
 $(curdir)/subtargets:=install
-$(curdir)/builddirs:=linux sdk imagebuilder toolchain
+$(curdir)/builddirs:=linux sdk imagebuilder toolchain llvm-bpf
 $(curdir)/builddirs-default:=linux
-$(curdir)/builddirs-install:=linux $(if $(CONFIG_SDK),sdk) $(if $(CONFIG_IB),imagebuilder) $(if $(CONFIG_MAKE_TOOLCHAIN),toolchain)
+$(curdir)/builddirs-install:=\
+	linux \
+	$(if $(CONFIG_SDK),sdk) \
+	$(if $(CONFIG_IB),imagebuilder) \
+	$(if $(CONFIG_MAKE_TOOLCHAIN),toolchain) \
+	$(if $(CONFIG_SDK_LLVM_BPF),llvm-bpf)
 
 $(curdir)/sdk/install:=$(curdir)/linux/install
 $(curdir)/imagebuilder/install:=$(curdir)/linux/install
diff --git a/target/llvm-bpf/Makefile b/target/llvm-bpf/Makefile
new file mode 100644
index 0000000000..c9ada017e6
--- /dev/null
+++ b/target/llvm-bpf/Makefile
@@ -0,0 +1,29 @@
+#
+# Copyright (C) 2021 OpenWrt.org
+#
+# This is free software, licensed under the GNU General Public License v2.
+# See /LICENSE for more information.
+#
+
+include $(TOPDIR)/rules.mk
+
+override MAKEFLAGS=
+
+LLVM_VERSION := $(shell cat $(STAGING_DIR_HOST)/llvm-bpf/.llvm-version)
+
+LLVM_BPF_PREFIX := llvm-bpf-$(LLVM_VERSION).$(HOST_OS)-$(HOST_ARCH)
+LLVM_TAR := $(BIN_DIR)/$(LLVM_BPF_PREFIX).tar.xz
+
+$(LLVM_TAR): $(HOST_STAMP_INSTALLED)
+	tar -C $(STAGING_DIR_HOST) \
+		-I '$(STAGING_DIR_HOST)/bin/xz -7e -T$(if $(filter 1,$(NPROC)),2,0)' \
+		-cf $@.tmp llvm-bpf $(LLVM_BPF_PREFIX)
+	mv $@.tmp $@
+
+download:
+prepare:
+compile: $(LLVM_TAR)
+install: compile
+
+clean:
+	rm -f $(LLVM_TAR)
diff --git a/tools/Makefile b/tools/Makefile
index 82a67a00dd..686d5294d3 100644
--- a/tools/Makefile
+++ b/tools/Makefile
@@ -156,8 +156,7 @@ $(curdir)/ := .config prereq
 
 $(curdir)/install: $(curdir)/compile
 
-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))
+tools_enabled = $(foreach tool,$(sort $(tools-y) $(tools-)),$(if $(filter $(tool),$(tools-y)),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)))
diff --git a/tools/llvm-bpf/Makefile b/tools/llvm-bpf/Makefile
index 586c8dba2d..527b357824 100644
--- a/tools/llvm-bpf/Makefile
+++ b/tools/llvm-bpf/Makefile
@@ -41,22 +41,12 @@ CMAKE_HOST_OPTIONS += \
 	-DLLVM_TOOLCHAIN_TOOLS="llvm-objcopy;llvm-objdump;llvm-readelf;llvm-strip;llvm-ar;llvm-as;llvm-dis;llvm-link;llvm-nm;llvm-ranlib;llc;opt" \
 	-DCMAKE_SKIP_RPATH=OFF
 
-$(BIN_DIR)/$(LLVM_BPF_PREFIX).tar.xz: $(HOST_STAMP_INSTALLED)
-	echo "$(PKG_VERSION)" > $(CMAKE_HOST_INSTALL_PREFIX)/.llvm-version
-	STRIP_KMOD= PATCHELF= STRIP=strip $(SCRIPT_DIR)/rstrip.sh $(STAGING_DIR_HOST)/llvm-bpf
-	tar -C $(STAGING_DIR_HOST) \
-		-I '$(STAGING_DIR_HOST)/bin/xz -7e -T$(if $(filter 1,$(NPROC)),2,0)' \
-		-cf $@.tmp llvm-bpf $(LLVM_BPF_PREFIX)
-	mv $@.tmp $@
-
-ifneq ($(CONFIG_SDK_LLVM_BPF),)
-compile: $(BIN_DIR)/$(LLVM_BPF_PREFIX).tar.xz
-endif
-
 define Host/Install
 	rm -rf $(STAGING_DIR_HOST)/llvm-bpf*
 	$(Host/Install/Default)
 	ln -s $(LLVM_BPF_PREFIX) $(STAGING_DIR_HOST)/llvm-bpf
+	STRIP_KMOD= PATCHELF= STRIP=strip $(SCRIPT_DIR)/rstrip.sh $(STAGING_DIR_HOST)/llvm-bpf
+	echo "$(PKG_VERSION)" > $(CMAKE_HOST_INSTALL_PREFIX)/.llvm-version
 endef
 
 define Host/Uninstall