On 18 Jun 2024, at 17:57, Ross Burton via lists.openembedded.org
<ross.burton=arm....@lists.openembedded.org> wrote:
>
> I went to have a quick look at this but can’t built bpftool:
>
> ERROR: bpftool-native-1.0-r0 do_compile: oe_runmake failed
> ERROR: bpftool-native-1.0-r0 do_compile:
> ExecutionError('/work/ross/build/tmp/work/aarch64-linux/bpftool-native/1.0/temp/run.do_compi)
> ERROR: Logfile of failure stored in:
> /work/ross/build/tmp/work/aarch64-linux/bpftool-native/1.0/temp/log.do_compile.1052635
> Log data follows:
> | DEBUG: Executing shell function do_compile
> | NOTE: make -j 64 V=1 -C
> /work/ross/build/tmp/work-shared/qemuarm64/kernel-source/tools/bpf/bpftool
> O=/work/ross/build/tmp/work/aarcn
> | make: Entering directory
> '/work/ross/build/tmp/work-shared/qemuarm64/kernel-source/tools/bpf/bpftool'
> | gcc: error: unrecognized command-line option ‘-fcanon-prefix-map’; did you
> mean ‘-fmacro-prefix-map=’?
> |
> | Auto-detecting system features:
> | ... clang-bpf-co-re: [ OFF ]
> | ... llvm: [ OFF ]
> | ... libcap: [ OFF ]
> | ... libbfd: [ OFF ]
> |
> | make -C
> /work/ross/build/tmp/work-shared/qemuarm64/kernel-source/tools/lib/bpf
> OUTPUT=/work/ross/build/tmp/work/aarch64-linux/bpfto\
> |
> DESTDIR=/work/ross/build/tmp/work/aarch64-linux/bpftool-native/1.0/bpftool-1.0/libbpf
> prefix= /work/ross/build/tmp/work/aarchs
> | make[1]: Entering directory
> '/work/ross/build/tmp/work-shared/qemuarm64/kernel-source/tools/lib/bpf'
> | gcc: error: unrecognized command-line option ‘-fcanon-prefix-map’; did you
> mean ‘-fmacro-prefix-map=’?
> | gcc: error: unrecognized command-line option ‘-fcanon-prefix-map’; did you
> mean ‘-fmacro-prefix-map=’?
>
> Looks like a problem with the host compiler being passed target flags. Have
> you seen this?
Yes, bpftool is passing DEBUG_PREFIX_MAP to the host compiler when building
natively, which won’t work.
I worked around that and had a look. A less ugly and probably upstreamable
solution might be to add —sysroot to propagate_cflags in meson.build, and add
the sysroot to CFLAGS directly in the recipe. For historical reasons we pass
the sysroot via CC, but specifying it twice won’t hurt.
Ross
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