On Mon, 20 Aug 2018 10:39:43 -0300 Arnaldo Carvalho de Melo <acme@xxxxxxxxxx> wrote: > 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? These all look like the compiler is being stupid. Do you think we really need to address it? -- Steve > > - 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 >
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