staging/xback/include/bpf.mk, branch master

build: bpf: fix LLVM tool paths with host toolchain

2025-04-09T07:52:21Z

Do not assume that the various tools like llc can be found under the same path as clang; instead, look them up through BPF_PATH (while still preferring ones found next to clang). This fixes build in common setups with ccache, where clang resolves to a path like /usr/lib/ccache/bin/clang, but no other tools can be found at that location. Signed-off-by: Matthias Schiffer Link: https://github.com/openwrt/openwrt/pull/18422 Signed-off-by: Robert Marko

build: bpf: drop clang-11 lookup

2025-04-09T07:52:21Z

CLANG_MIN_VER is 12, so there is no point in looking for clang-11. Signed-off-by: Matthias Schiffer Link: https://github.com/openwrt/openwrt/pull/18422 Signed-off-by: Robert Marko

build: conditionally build llvm bpf toolchain by default

2025-02-07T10:16:08Z

Unless another toolchain is present (or selected), build the bpf toolchain whenever a package is selected that needs it. Signed-off-by: Felix Fietkau

bpf: fix llvm version check

2024-09-09T08:36:47Z

- specify CC target explicitly Signed-off-by: Konstantin Demin Link: https://github.com/openwrt/openwrt/pull/15703 Signed-off-by: Robert Marko

bpf: also include toolchain standard header as system header

2024-06-17T11:48:29Z

Also include toolchain standard header as system header. These are required by xdp-tools that try to include stddef.h and stdbool.h for some tools. These header are usually in /lib/gcc/../include but musl also have some special variant in /include. To fix compilation of xdp-tools, also include these standard header. These header should follow ISO C standard and should not introduce regression in bpf tools making them specific to an arch. Link: https://github.com/openwrt/openwrt/pull/15390 Signed-off-by: Christian Marangi

bpf: fix broken inclusion of system include

2024-05-03T12:53:11Z

Commit d82c5884c616 ("treewide: make use of new toolchain define") changed $(TOOLCHAIN_DIR)/include to the new variable $(TOOLCHAIN_INC_DIRS) that now can contain multiple entry. Because of this only the first include in $(TOOLCHAIN_INC_DIRS) was actually included with -isystem, making the other producing warning with ignored inputs. Fix this by parsing each entry in $(TOOLCHAIN_INC_DIRS) and adding the -isystem prefix to correctly include them in the BPF_KERNEL_INCLUDE. Fixes: d82c5884c616 ("treewide: make use of new toolchain define") Signed-off-by: Christian Marangi

treewide: make use of new toolchain define

2023-10-20T14:13:56Z

Make use of new toolchain define. TOOLCHAIN_DIR should be used only for toolchain related packages and for everything else TOOLCHAIN_ROOT_DIR and other define should be used instead. Switch to new entry where possible. Signed-off-by: Christian Marangi

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

2023-01-18T23:29:09Z

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 Signed-off-by: Christian Marangi

bpf: check llvm version only when used

2022-10-30T23:46:55Z

unetd always includes $(INCLUDE_DIR)/bpf.mk. This file always checks if the LLVM version is supported in CLANG_VER_VALID. unetd only needs bpf when UNETD_VXLAN_SUPPORT is set. It fails when UNETD_VXLAN_SUPPORT is not set and llvm is not installed. Fix it by only checking the LLVM version when a LLVM toolchain is available. Signed-off-by: Hauke Mehrtens

treewide: drop use of which

2022-01-17T08:14:26Z

Ubuntu started to flag which as deprecated and it seems which is not really standard and may vary across Distro. Drop the use of which and use the standard 'command -v' for this simple task. Which is still present in the prereq if some package/script still use which. A utility script called command_all.sh is implemented that will just mimic the output of which -a. Signed-off-by: Ansuel Smith