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build: conditionally build llvm bpf toolchain by default
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Unless another toolchain is present (or selected), build the bpf toolchain
whenever a package is selected that needs it.

Signed-off-by: Felix Fietkau <nbd@nbd.name>
(cherry picked from commit 6605e45676815156f0c47d4117ee401e6616fcac)
This commit is contained in:
Felix Fietkau 2025-02-07 11:11:42 +01:00
parent 7609571dcd
commit 8cd50a6aec
3 changed files with 9 additions and 8 deletions
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2
include/bpf.mk
View File

@ -1,4 +1,4 @@
BPF_DEPENDS := @HAS_BPF_TOOLCHAIN
BPF_DEPENDS := @HAS_BPF_TOOLCHAIN +@NEED_BPF_TOOLCHAIN
LLVM_VER:=
CLANG_MIN_VER:=12

1
package/network/services/unetd/Makefile
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@ -40,6 +40,7 @@ define Package/unetd/config
bool "VXLAN support"
depends on PACKAGE_unetd
depends on HAS_BPF_TOOLCHAIN
select NEED_BPF_TOOLCHAIN
default y
endef

14
toolchain/Config.in
View File

@ -40,9 +40,8 @@ menuconfig TARGET_OPTIONS
choice BPF_TOOLCHAIN
prompt "BPF toolchain" if DEVEL
default BPF_TOOLCHAIN_BUILD_LLVM if BUILDBOT
default BPF_TOOLCHAIN_PREBUILT if HAS_PREBUILT_LLVM_TOOLCHAIN
default BPF_TOOLCHAIN_NONE
default BPF_TOOLCHAIN_BUILD_LLVM
config BPF_TOOLCHAIN_NONE
bool "None"
@ -57,7 +56,7 @@ menuconfig TARGET_OPTIONS
bool "Use host LLVM toolchain"
config BPF_TOOLCHAIN_BUILD_LLVM
select USE_LLVM_BUILD
select USE_LLVM_BUILD if NEED_BPF_TOOLCHAIN
bool "Build LLVM toolchain for eBPF"
help
If enabled, a LLVM toolchain for building eBPF binaries will be built.
@ -320,23 +319,24 @@ config GDB_PYTHON
Enable the python bindings for GDB to allow using python in the gdb shell.
config HAS_BPF_TOOLCHAIN
default y if !BPF_TOOLCHAIN_NONE
bool
config NEED_BPF_TOOLCHAIN
bool
config HAS_PREBUILT_LLVM_TOOLCHAIN
def_bool $(shell, [ -f llvm-bpf/.llvm-version ] && echo y || echo n)
config USE_LLVM_HOST
select HAS_BPF_TOOLCHAIN
bool
config USE_LLVM_PREBUILT
select HAS_BPF_TOOLCHAIN
default y if !DEVEL && !BUILDBOT && HAS_PREBUILT_LLVM_TOOLCHAIN
bool
config USE_LLVM_BUILD
default y if !DEVEL && BUILDBOT
select HAS_BPF_TOOLCHAIN
default y if !DEVEL && NEED_BPF_TOOLCHAIN && (BUILDBOT || !HAS_PREBUILT_LLVM_TOOLCHAIN)
bool
config USE_GLIBC