Linking issue during perf build

[RAttab]

From a clean build (meson got confused midway through the build) I go the following:

  CC       tests/llvm-src-kbuild.o
  CC       util/pmu-flex.o
  CC       tests/llvm-src-prologue.o
  CC       tests/llvm-src-relocation.o
  LD       tests/perf-in.o
  LD       perf-in.o
  LD       util/libperf-in.o
  LD       libperf-in.o
  AR       libperf.a
  LINK     perf
../../../../build/dist/erlang-sample@exe/src_dwarf_helpers.c.o: In function `find_elf':
/home/remi/code/extrospect-beam/build/../src/dwarf_helpers.c:14: undefined reference to `dwfl_build_id_find_elf'
/home/remi/code/extrospect-beam/build/../src/dwarf_helpers.c:16: undefined reference to `dwfl_linux_kernel_find_elf'
/home/remi/code/extrospect-beam/build/../src/dwarf_helpers.c:21: undefined reference to `dwfl_linux_proc_find_elf'
../../../../build/dist/erlang-sample@exe/src_dwarf_helpers.c.o: In function `dwarf_helpers_get_dwfl':
/home/remi/code/extrospect-beam/build/../src/dwarf_helpers.c:34: undefined reference to `dwfl_begin'
/home/remi/code/extrospect-beam/build/../src/dwarf_helpers.c:36: undefined reference to `dwfl_errmsg'
/home/remi/code/extrospect-beam/build/../src/dwarf_helpers.c:37: undefined reference to `dwfl_linux_proc_report'
/home/remi/code/extrospect-beam/build/../src/dwarf_helpers.c:38: undefined reference to `dwfl_errmsg'
/home/remi/code/extrospect-beam/build/../src/dwarf_helpers.c:39: undefined reference to `dwfl_linux_kernel_report_kernel'
/home/remi/code/extrospect-beam/build/../src/dwarf_helpers.c:40: undefined reference to `dwfl_errmsg'
/home/remi/code/extrospect-beam/build/../src/dwarf_helpers.c:41: undefined reference to `dwfl_linux_kernel_report_modules'
/home/remi/code/extrospect-beam/build/../src/dwarf_helpers.c:42: undefined reference to `dwfl_errmsg'
/home/remi/code/extrospect-beam/build/../src/dwarf_helpers.c:44: undefined reference to `dwfl_report_end'
/home/remi/code/extrospect-beam/build/../src/dwarf_helpers.c:45: undefined reference to `dwfl_errmsg'
../../../../build/dist/erlang-sample@exe/src_dwarf_helpers.c.o: In function `dwarf_helpers_find_module_matching_substring':
/home/remi/code/extrospect-beam/build/../src/dwarf_helpers.c:70: undefined reference to `dwfl_getmodules'
../../../../build/dist/erlang-sample@exe/src_dwarf_helpers.c.o: In function `dwarf_helpers_info_address':
/home/remi/code/extrospect-beam/build/../src/dwarf_helpers.c:87: undefined reference to `dwfl_module_getsymtab'
/home/remi/code/extrospect-beam/build/../src/dwarf_helpers.c:91: undefined reference to `dwfl_module_getsym'
../../../../build/dist/erlang-sample@exe/src_dwarf_helpers.c.o: In function `dwarf_helpers_dump_die':
/home/remi/code/extrospect-beam/build/../src/dwarf_helpers.c:214: undefined reference to `dwarf_diename'
/home/remi/code/extrospect-beam/build/../src/dwarf_helpers.c:215: undefined reference to `dwarf_diename'
/home/remi/code/extrospect-beam/build/../src/dwarf_helpers.c:215: undefined reference to `dwarf_tag'
/home/remi/code/extrospect-beam/build/../src/dwarf_helpers.c:219: undefined reference to `dwarf_diename'
/home/remi/code/extrospect-beam/build/../src/dwarf_helpers.c:219: undefined reference to `dwarf_tag'
/home/remi/code/extrospect-beam/build/../src/dwarf_helpers.c:223: undefined reference to `dwarf_haschildren'
/home/remi/code/extrospect-beam/build/../src/dwarf_helpers.c:223: undefined reference to `dwarf_child'
/home/remi/code/extrospect-beam/build/../src/dwarf_helpers.c:226: undefined reference to `dwarf_siblingof'
../../../../build/dist/erlang-sample@exe/src_dwarf_helpers.c.o: In function `dwarf_helpers_find_toplevel_symbol':
/home/remi/code/extrospect-beam/build/../src/dwarf_helpers.c:240: undefined reference to `dwarf_haschildren'
/home/remi/code/extrospect-beam/build/../src/dwarf_helpers.c:242: undefined reference to `dwarf_child'
/home/remi/code/extrospect-beam/build/../src/dwarf_helpers.c:245: undefined reference to `dwarf_tag'
/home/remi/code/extrospect-beam/build/../src/dwarf_helpers.c:246: undefined reference to `dwarf_diename'
/home/remi/code/extrospect-beam/build/../src/dwarf_helpers.c:250: undefined reference to `dwarf_siblingof'
/home/remi/code/extrospect-beam/build/../src/dwarf_helpers.c:239: undefined reference to `dwfl_module_nextcu'
../../../../build/dist/erlang-sample@exe/src_dwarf_helpers.c.o: In function `dwarf_helpers_find_peeled_type':
/home/remi/code/extrospect-beam/build/../src/dwarf_helpers.c:261: undefined reference to `dwarf_haschildren'
/home/remi/code/extrospect-beam/build/../src/dwarf_helpers.c:263: undefined reference to `dwarf_child'
/home/remi/code/extrospect-beam/build/../src/dwarf_helpers.c:266: undefined reference to `dwarf_tag'
/home/remi/code/extrospect-beam/build/../src/dwarf_helpers.c:268: undefined reference to `dwarf_hasattr'
/home/remi/code/extrospect-beam/build/../src/dwarf_helpers.c:270: undefined reference to `dwarf_diename'
/home/remi/code/extrospect-beam/build/../src/dwarf_helpers.c:277: undefined reference to `dwarf_hasattr'
/home/remi/code/extrospect-beam/build/../src/dwarf_helpers.c:278: undefined reference to `dwarf_attr'
/home/remi/code/extrospect-beam/build/../src/dwarf_helpers.c:279: undefined reference to `dwarf_formref_die'
/home/remi/code/extrospect-beam/build/../src/dwarf_helpers.c:280: undefined reference to `dwarf_errmsg'
/home/remi/code/extrospect-beam/build/../src/dwarf_helpers.c:284: undefined reference to `dwarf_peel_type'
/home/remi/code/extrospect-beam/build/../src/dwarf_helpers.c:285: undefined reference to `dwarf_errmsg'
/home/remi/code/extrospect-beam/build/../src/dwarf_helpers.c:289: undefined reference to `dwarf_diename'
/home/remi/code/extrospect-beam/build/../src/dwarf_helpers.c:290: undefined reference to `dwarf_tag'
/home/remi/code/extrospect-beam/build/../src/dwarf_helpers.c:292: undefined reference to `dwarf_siblingof'
/home/remi/code/extrospect-beam/build/../src/dwarf_helpers.c:260: undefined reference to `dwfl_module_nextcu'
../../../../build/dist/erlang-sample@exe/src_dwarf_helpers.c.o: In function `dwarf_helpers_offset_of':
/home/remi/code/extrospect-beam/build/../src/dwarf_helpers.c:301: undefined reference to `dwarf_haschildren'
/home/remi/code/extrospect-beam/build/../src/dwarf_helpers.c:305: undefined reference to `dwarf_child'
/home/remi/code/extrospect-beam/build/../src/dwarf_helpers.c:306: undefined reference to `dwarf_errmsg'
/home/remi/code/extrospect-beam/build/../src/dwarf_helpers.c:310: undefined reference to `dwarf_diename'
/home/remi/code/extrospect-beam/build/../src/dwarf_helpers.c:359: undefined reference to `dwarf_siblingof'
/home/remi/code/extrospect-beam/build/../src/dwarf_helpers.c:313: undefined reference to `dwarf_hasattr'
/home/remi/code/extrospect-beam/build/../src/dwarf_helpers.c:318: undefined reference to `dwarf_attr'
/home/remi/code/extrospect-beam/build/../src/dwarf_helpers.c:319: undefined reference to `dwarf_errmsg'
/home/remi/code/extrospect-beam/build/../src/dwarf_helpers.c:324: undefined reference to `dwarf_whatform'
/home/remi/code/extrospect-beam/build/../src/dwarf_helpers.c:330: undefined reference to `dwarf_formudata'
/home/remi/code/extrospect-beam/build/../src/dwarf_helpers.c:331: undefined reference to `dwarf_errmsg'
/home/remi/code/extrospect-beam/build/../src/dwarf_helpers.c:339: undefined reference to `dwarf_formblock'
/home/remi/code/extrospect-beam/build/../src/dwarf_helpers.c:340: undefined reference to `dwarf_errmsg'
/home/remi/code/extrospect-beam/build/../src/dwarf_helpers.c:356: undefined reference to `dwarf_whatform'
../../../../build/dist/erlang-sample@exe/src_dwarf_helpers.c.o: In function `perf_reg_of_dwarf_reg':
/home/remi/code/extrospect-beam/build/../src/dwarf_helpers.c:532: undefined reference to `dwfl_module_register_names'
/home/remi/code/extrospect-beam/build/../src/dwarf_helpers.c:533: undefined reference to `dwarf_errmsg'
../../../../build/dist/erlang-sample@exe/src_dwarf_helpers.c.o: In function `dwarf_helpers_find_register_for':
/home/remi/code/extrospect-beam/build/../src/dwarf_helpers.c:543: undefined reference to `dwarf_child'
/home/remi/code/extrospect-beam/build/../src/dwarf_helpers.c:545: undefined reference to `dwarf_tag'
/home/remi/code/extrospect-beam/build/../src/dwarf_helpers.c:547: undefined reference to `dwarf_diename'
/home/remi/code/extrospect-beam/build/../src/dwarf_helpers.c:551: undefined reference to `dwarf_hasattr'
/home/remi/code/extrospect-beam/build/../src/dwarf_helpers.c:555: undefined reference to `dwarf_attr'
/home/remi/code/extrospect-beam/build/../src/dwarf_helpers.c:556: undefined reference to `dwarf_errmsg'
/home/remi/code/extrospect-beam/build/../src/dwarf_helpers.c:558: undefined reference to `dwarf_whatform'
/home/remi/code/extrospect-beam/build/../src/dwarf_helpers.c:562: undefined reference to `dwarf_formblock'
/home/remi/code/extrospect-beam/build/../src/dwarf_helpers.c:562: undefined reference to `dwarf_errmsg'
/home/remi/code/extrospect-beam/build/../src/dwarf_helpers.c:573: undefined reference to `dwarf_whatform'
/home/remi/code/extrospect-beam/build/../src/dwarf_helpers.c:577: undefined reference to `dwarf_siblingof'
../../../../build/dist/erlang-sample@exe/src_dwarf_helpers.c.o:(.rodata+0x8e8): undefined reference to `dwfl_standard_find_debuginfo'
../../../../build/dist/erlang-sample@exe/src_dwarf_helpers.c.o:(.rodata+0x8f0): undefined reference to `dwfl_linux_kernel_module_section_address'
collect2: error: ld returned 1 exit status
Makefile.perf:435: recipe for target 'perf' failed
make[1]: *** [perf] Error 1
Makefile:68: recipe for target 'all' failed
make: *** [all] Error 2

Still trying to track down the cause.

[tokenrove]

What was the config output at the top of the perf build? Should look something like

Auto-detecting system features:
...                         dwarf: [ on  ]
...            dwarf_getlocations: [ on  ]
...                         glibc: [ on  ]
...                          gtk2: [ on  ]
...                      libaudit: [ OFF ]
...                        libbfd: [ OFF ]
...                        libelf: [ on  ]
...                       libnuma: [ on  ]
...        numa_num_possible_cpus: [ on  ]
...                       libperl: [ OFF ]
...                     libpython: [ on  ]
...                      libslang: [ on  ]
...                     libcrypto: [ on  ]
...                     libunwind: [ on  ]
...            libdw-dwarf-unwind: [ on  ]
...                          zlib: [ on  ]
...                          lzma: [ on  ]
...                     get_cpuid: [ on  ]
...                           bpf: [ on  ]

Makefile.config:479: No libaudit.h found, disables 'trace' tool, please install audit-libs-devel or libaudit-dev
Makefile.config:547: Missing perl devel files. Disabling perl scripting support, please install perl-ExtUtils-Embed/libperl-dev
Makefile.config:651: No bfd.h/libbfd found, please install binutils-dev[el]/zlib-static/libiberty-dev to gain symbol demangling

[tokenrove]

(Those errors would be caused by not linking against libdw, which it should be doing since the build script sets NO_LIBUNWIND=1)

[RAttab]

Auto-detecting system features:
...                         dwarf: [ OFF ]
...            dwarf_getlocations: [ OFF ]
...                         glibc: [ on  ]
...                          gtk2: [ OFF ]
...                      libaudit: [ OFF ]
...                        libbfd: [ OFF ]
...                        libelf: [ OFF ]
...                       libnuma: [ OFF ]
...        numa_num_possible_cpus: [ OFF ]
...                       libperl: [ OFF ]
...                     libpython: [ OFF ]
...                      libslang: [ OFF ]
...                     libcrypto: [ on  ]
...                     libunwind: [ OFF ]
...            libdw-dwarf-unwind: [ OFF ]
...                          zlib: [ on  ]
...                          lzma: [ on  ]
...                     get_cpuid: [ on  ]
...                           bpf: [ on  ]

Makefile.config:260: No libelf found, disables 'probe' tool and BPF support in 'perf record', please install libelf-dev, libelf-devel or elfutils-libelf-devel
Makefile.config:360: No sys/sdt.h found, no SDT events are defined, please install systemtap-sdt-devel or systemtap-sdt-dev
Makefile.config:433: Disabling post unwind, no support found.
Makefile.config:479: No libaudit.h found, disables 'trace' tool, please install audit-libs-devel or libaudit-dev
Makefile.config:505: slang not found, disables TUI support. Please install slang-devel, libslang-dev or libslang2-dev
Makefile.config:519: GTK2 not found, disables GTK2 support. Please install gtk2-devel or libgtk2.0-dev
Makefile.config:547: Missing perl devel files. Disabling perl scripting support, please install perl-ExtUtils-Embed/libperl-dev
Makefile.config:578: No 'python-config' tool was found: disables Python support - please install python-devel/python-dev
Makefile.config:693: No numa.h found, disables 'perf bench numa mem' benchmark, please install numactl-devel/libnuma-devel/libnuma-dev
make[2]: *** No rule to make target 'kernelversion'.  Stop.

I have a lot more things set to OFF then you do.