Messages in this thread | | | From | Tiezhu Yang <> | Subject | [QUESTION] Will the pahole tar source code with corresponding libbpf submodule codes be released as well in the future? | Date | Thu, 15 Apr 2021 12:01:23 +0800 |
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(1) tools/bpf/bpftool build failed due to the following reason:
Error: failed to load BTF from /boot/vmlinux-5.12.0-rc2: No such file or directory make: *** [Makefile:158: vmlinux.h] Error 2
(2) When set CONFIG_DEBUG_INFO_BTF=y, failed to generate BTF for vmlinux due to pahole is not available
BTF: .tmp_vmlinux.btf: pahole (pahole) is not available Failed to generate BTF for vmlinux Try to disable CONFIG_DEBUG_INFO_BTF make: *** [Makefile:1197: vmlinux] Error 1
(3) When build pahole from tar.gz source code, it still failed due to no libbpf submodule.
loongson@linux:~$ wget https://git.kernel.org/pub/scm/devel/pahole/pahole.git/snapshot/pahole-1.21.tar.gz loongson@linux:~$ tar xf pahole-1.21.tar.gz loongson@linux:~$ cd pahole-1.21 loongson@linux:~/pahole-1.21$ mkdir build loongson@linux:~/pahole-1.21$ cd build/ loongson@linux:~/pahole-1.21/build$ cmake -D__LIB=lib .. -- The C compiler identification is GNU 10.2.1 -- Detecting C compiler ABI info -- Detecting C compiler ABI info - done -- Check for working C compiler: /usr/bin/cc - skipped -- Detecting C compile features -- Detecting C compile features - done -- Checking availability of DWARF and ELF development libraries -- Looking for dwfl_module_build_id in elf -- Looking for dwfl_module_build_id in elf - found -- Found dwarf.h header: /usr/include -- Found elfutils/libdw.h header: /usr/include -- Found libdw library: /usr/lib/mips64el-linux-gnuabi64/libdw.so -- Found libelf library: /usr/lib/mips64el-linux-gnuabi64/libelf.so -- Checking availability of DWARF and ELF development libraries - done -- Found ZLIB: /usr/lib/mips64el-linux-gnuabi64/libz.so (found version "1.2.11") CMake Error at CMakeLists.txt:60 (message): The submodules were not downloaded! GIT_SUBMODULE was turned off or failed. Please update submodules and try again.
-- Configuring incomplete, errors occurred! See also "/home/loongson/pahole-1.21/build/CMakeFiles/CMakeOutput.log".
(4) I notice that the pahole git source code can build successful because it will clone libbpf automatically:
-- Submodule update Submodule 'lib/bpf' (https://github.com/libbpf/libbpf) registered for path 'lib/bpf' Cloning into '/home/loongson/pahole/lib/bpf'... Submodule path 'lib/bpf': checked out '986962fade5dfa89c2890f3854eb040d2a64ab38' -- Submodule update - done
(5) So Will the pahole tar source code with corresponding libbpf submodule codes be released as well in the future? just like bcc: https://github.com/iovisor/bcc/releases https://github.com/iovisor/bcc/commit/708f786e3784dc32570a079f2ed74c35731664ea
Thanks, Tiezhu
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