Hi guys, I noticed this while working on a new perf build container for the Clear Linux distro, can you take a look at it so that we get the build clean on Clear? - Arnaldo root@28864dcfe31b /git/perf # gcc -v Using built-in specs. COLLECT_GCC=gcc COLLECT_LTO_WRAPPER=/usr/lib64/gcc/x86_64-generic-linux/8.2.0/lto-wrapper Target: x86_64-generic-linux Configured with: ../gcc-8.2.0/configure --prefix=/usr --with-pkgversion='Clear Linux OS for Intel Architecture' --libdir=/usr/lib64 --enable-libstdcxx-pch --libexecdir=/usr/lib64 --with-system-zlib --enable-shared --enable-gnu-indirect-function --disable-vtable-verify --enable-threads=posix --enable-__cxa_atexit --enable-plugin --enable-ld=default --enable-clocale=gnu --disable-multiarch --enable-multilib --enable-lto --enable-linker-build-id --build=x86_64-generic-linux --target=x86_64-generic-linux --enable-languages=c,c++,fortran,go --enable-bootstrap --with-ppl=yes --with-isl --includedir=/usr/include --with-gxx-include-dir=/usr/include/c++/ --exec-prefix=/usr --with-glibc-version=2.19 --disable-libunwind-exceptions --with-gnu-ld --with-tune=haswell --with-arch=westmere --disable-libmpx Thread model: posix gcc version 8.2.0 (Clear Linux OS for Intel Architecture) root@28864dcfe31b /git/perf # root@28864dcfe31b /git # swupd bundle-add c-basic Downloading packs... Extracting c-basic pack for version 24500 ...50% Extracting perl-basic pack for version 24430 ...100% Starting download of remaining update content. This may take a while... ...100% Finishing download of update content... Installing bundle(s) files... ...100% Calling post-update helper scripts. Successfully installed 1 bundle root@28864dcfe31b /git # root@28864dcfe31b /git/perf # make -C tools/perf O=/tmp/build/perf make: Entering directory '/git/perf/tools/perf' BUILD: Doing 'make -j4' parallel build HOSTCC /tmp/build/perf/fixdep.o HOSTLD /tmp/build/perf/fixdep-in.o LINK /tmp/build/perf/fixdep Auto-detecting system features: ... dwarf: [ OFF ] ... dwarf_getlocations: [ OFF ] ... glibc: [ on ] ... gtk2: [ OFF ] ... libaudit: [ OFF ] ... libbfd: [ on ] ... libelf: [ OFF ] ... libnuma: [ OFF ] ... numa_num_possible_cpus: [ OFF ] ... libperl: [ on ] ... libpython: [ OFF ] ... libslang: [ OFF ] ... libcrypto: [ OFF ] ... libunwind: [ OFF ] ... libdw-dwarf-unwind: [ OFF ] ... zlib: [ on ] ... lzma: [ OFF ] ... get_cpuid: [ on ] ... bpf: [ on ] Makefile.config:318: No libelf found. Disables 'probe' tool, jvmti and BPF support in 'perf record'. Please install libelf-dev, libelf-devel or elfutils-libelf-devel Makefile.config:445: No sys/sdt.h found, no SDT events are defined, please install systemtap-sdt-devel or systemtap-sdt-dev Makefile.config:518: Disabling post unwind, no support found. Makefile.config:583: No libcrypto.h found, disables jitted code injection, please install libssl-devel or libssl-dev Makefile.config:598: slang not found, disables TUI support. Please install slang-devel, libslang-dev or libslang2-dev Makefile.config:612: GTK2 not found, disables GTK2 support. Please install gtk2-devel or libgtk2.0-dev Makefile.config:666: No python interpreter was found: disables Python support - please install python-devel/python-dev Makefile.config:750: No liblzma found, disables xz kernel module decompression, please install xz-devel/liblzma-dev Makefile.config:763: No numa.h found, disables 'perf bench numa mem' benchmark, please install numactl-devel/libnuma-devel/libnuma-dev Makefile.config:814: No libbabeltrace found, disables 'perf data' CTF format support, please install libbabeltrace-dev[el]/libbabeltrace-ctf-dev GEN /tmp/build/perf/common-cmds.h MKDIR /tmp/build/perf/fd/ CC /tmp/build/perf/fd/array.o CC /tmp/build/perf/event-parse.o LD /tmp/build/perf/fd/libapi-in.o MKDIR /tmp/build/perf/fs/ CC /tmp/build/perf/fs/fs.o MKDIR /tmp/build/perf/fs/ CC /tmp/build/perf/fs/tracing_path.o LD /tmp/build/perf/fs/libapi-in.o CC /tmp/build/perf/cpu.o CC /tmp/build/perf/debug.o CC /tmp/build/perf/str_error_r.o LD /tmp/build/perf/libapi-in.o AR /tmp/build/perf/libapi.a CC /tmp/build/perf/exec-cmd.o MKDIR /tmp/build/perf/pmu-events/ HOSTCC /tmp/build/perf/pmu-events/json.o event-parse.c: In function ‘tep_find_event_by_name’: event-parse.c:3519:21: warning: ‘event’ may be used uninitialized in this function [-Wmaybe-uninitialized] pevent->last_event = event; ~~~~~~~~~~~~~~~~~~~^~~~~~~ MKDIR /tmp/build/perf/pmu-events/ event-parse.c: In function ‘tep_data_lat_fmt’: event-parse.c:5198:4: warning: ‘migrate_disable’ may be used uninitialized in this function [-Wmaybe-uninitialized] trace_seq_printf(s, "%d", migrate_disable); ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ event-parse.c:5205:4: warning: ‘lock_depth’ may be used uninitialized in this function [-Wmaybe-uninitialized] trace_seq_printf(s, "%d", lock_depth); ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ HOSTCC /tmp/build/perf/pmu-events/jsmn.o event-parse.c: In function ‘tep_event_info’: event-parse.c:5045:7: warning: ‘len_arg’ may be used uninitialized in this function [-Wmaybe-uninitialized] trace_seq_printf(s, format, len_arg, (char)val); ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ event-parse.c:4882:6: note: ‘len_arg’ was declared here int len_arg; ^~~~~~~ event-parse.c:4336:11: warning: ‘vsize’ may be used uninitialized in this function [-Wmaybe-uninitialized] val = tep_read_number(pevent, bptr, vsize); ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ event-parse.c:4222:6: note: ‘vsize’ was declared here int vsize; ^~~~~ CC /tmp/build/perf/help.o HOSTCC /tmp/build/perf/pmu-events/jevents.o HOSTLD /tmp/build/perf/pmu-events/jevents-in.o CC /tmp/build/perf/pager.o CC /tmp/build/perf/event-plugin.o CC /tmp/build/perf/plugin_jbd2.o LD /tmp/build/perf/plugin_jbd2-in.o CC /tmp/build/perf/trace-seq.o CC /tmp/build/perf/plugin_hrtimer.o CC /tmp/build/perf/parse-options.o LD /tmp/build/perf/plugin_hrtimer-in.o CC /tmp/build/perf/plugin_kmem.o CC /tmp/build/perf/parse-filter.o LD /tmp/build/perf/plugin_kmem-in.o CC /tmp/build/perf/plugin_kvm.o LD 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LINK /tmp/build/perf/plugin_function.so LINK /tmp/build/perf/plugin_xen.so LINK /tmp/build/perf/plugin_scsi.so LINK /tmp/build/perf/plugin_cfg80211.so CC /tmp/build/perf/subcmd-config.o GEN perf-with-kcore CC /tmp/build/perf/builtin-bench.o MKDIR /tmp/build/perf/util/ CC /tmp/build/perf/util/annotate.o MKDIR /tmp/build/perf/util/ CC /tmp/build/perf/util/block-range.o LD /tmp/build/perf/libsubcmd-in.o AR /tmp/build/perf/libsubcmd.a GEN /tmp/build/perf/pmu-events/pmu-events.c CC /tmp/build/perf/builtin-annotate.o CC /tmp/build/perf/util/build-id.o CC /tmp/build/perf/pmu-events/pmu-events.o LD /tmp/build/perf/pmu-events/pmu-events-in.o CC /tmp/build/perf/builtin-config.o CC /tmp/build/perf/util/config.o GEN /tmp/build/perf/libtraceevent-dynamic-list CC /tmp/build/perf/builtin-diff.o CC /tmp/build/perf/builtin-evlist.o CC /tmp/build/perf/builtin-ftrace.o CC /tmp/build/perf/util/ctype.o CC /tmp/build/perf/util/db-export.o CC /tmp/build/perf/builtin-help.o CC /tmp/build/perf/util/env.o CC 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CC /tmp/build/perf/util/pmu.o CC /tmp/build/perf/util/pmu-flex.o LD /tmp/build/perf/util/libperf-in.o LD /tmp/build/perf/libperf-in.o AR /tmp/build/perf/libperf.a LINK /tmp/build/perf/perf make: Leaving directory '/git/perf/tools/perf' root@28864dcfe31b /git/perf #