Not searching for unused variables given on the command line.
-- The C compiler identification is GNU 13.3.0
-- Detecting C compiler ABI info
-- Detecting C compiler ABI info - done
-- Check for working C compiler: /builder/shared-workdir/build/sdk/staging_dir/toolchain-loongarch64_generic_gcc-13.3.0_musl/bin/loongarch64-openwrt-linux-musl-gcc - skipped
-- Detecting C compile features
-- Detecting C compile features - done
-- Configuring done (0.4s)
CMake Error: The following variables are used in this project, but they are set to NOTFOUND.
Please set them or make sure they are set and tested correctly in the CMake files:
bpf
    linked by target "bridger" in directory /builder/shared-workdir/build/sdk/build_dir/target-loongarch64_generic_musl/bridger-2024.04.22~40b1c5b6

-- Generating done (0.0s)
CMake Generate step failed.  Build files cannot be regenerated correctly.
make[3]: *** [Makefile:67: /builder/shared-workdir/build/sdk/build_dir/target-loongarch64_generic_musl/bridger-2024.04.22~40b1c5b6/.configured_a17fb5ef857664f03cd0ce37cc5ea591] Error 1
time: package/feeds/base/bridger/compile#0.74#0.55#1.36