On Mon, Jan 08, 2018 at 06:11:22PM +0100, Jiri Olsa wrote:
> On Mon, Jan 08, 2018 at 12:24:33PM -0300, Arnaldo Carvalho de Melo wrote:
> 
> SNIP
> 
> > 
> > Works:
> > 
> > [acme@jouet perf]$ ldd ~/bin/perf | grep babel
> >     libbabeltrace-ctf.so.1 => /lib64/libbabeltrace-ctf.so.1 
> > (0x00007fcb688d0000)
> >     libbabeltrace.so.1 => /lib64/libbabeltrace.so.1 (0x00007fcb67e92000)
> > [acme@jouet perf]$ rpm -q libbabeltrace-devel
> > libbabeltrace-devel-1.5.3-1.fc27.x86_64
> > [acme@jouet perf]$
> > 
> > But then, if we show:
> > 
> > Auto-detecting system features:
> > ...                         dwarf: [ on  ]
> > ...            dwarf_getlocations: [ on  ]
> > ...                         glibc: [ on  ]
> > ...                          gtk2: [ on  ]
> > ...                      libaudit: [ on  ]
> > ...                        libbfd: [ on  ]
> > ...                        libelf: [ on  ]
> > ...                       libnuma: [ on  ]
> > ...        numa_num_possible_cpus: [ on  ]
> > ...                       libperl: [ on  ]
> > ...                     libpython: [ on  ]
> > ...                      libslang: [ on  ]
> > ...                     libcrypto: [ on  ]
> > ...                     libunwind: [ on  ]
> > ...            libdw-dwarf-unwind: [ on  ]
> > ...                          zlib: [ on  ]
> > ...                          lzma: [ on  ]
> > ...                     get_cpuid: [ on  ]
> > ...                           bpf: [ on  ]
> > 
> > Shoudln't we tell the user that babeltrace was linked too?
> 
> the logic is just to simply display the state of features
> which we provide in FEATURE_DISPLAY variable, which is
> believed to be common and important enough to display
> status about
> 
> maybe we could display it with 'make VF=1' output?

like in patch attached ;-)

        [jolsa@krava perf]$ make VF=1
          BUILD:   Doing 'make -j4' parallel build
        Warning: Kernel ABI header at 'tools/include/uapi/linux/perf_event.h' 
differs from latest version at 'include/uapi/linux/perf_event.h'

        Auto-detecting system features:
        ...                         dwarf: [ on  ]
        ...            dwarf_getlocations: [ on  ]
        ...                         glibc: [ on  ]
        ...                          gtk2: [ on  ]
        ...                      libaudit: [ on  ]
        ...                        libbfd: [ on  ]
        ...                        libelf: [ on  ]
        ...                       libnuma: [ on  ]
        ...        numa_num_possible_cpus: [ on  ]
        ...                       libperl: [ on  ]
        ...                     libpython: [ on  ]
        ...                      libslang: [ on  ]
        ...                     libcrypto: [ on  ]
        ...                     libunwind: [ OFF ]
        ...            libdw-dwarf-unwind: [ on  ]
        ...                          zlib: [ on  ]
        ...                          lzma: [ on  ]
        ...                     get_cpuid: [ on  ]
        ...                           bpf: [ on  ]
        ...                     backtrace: [ on  ]
        ...                fortify-source: [ on  ]
        ...         sync-compare-and-swap: [ on  ]
        ...                  gtk2-infobar: [ on  ]
        ...             libelf-getphdrnum: [ on  ]
        ...           libelf-gelf_getnote: [ on  ]
        ...          libelf-getshdrstrndx: [ on  ]
        ...                   libelf-mmap: [ on  ]
        ...             libpython-version: [ on  ]
        ...                 libunwind-x86: [ OFF ]
        ...              libunwind-x86_64: [ OFF ]
        ...                 libunwind-arm: [ OFF ]
        ...             libunwind-aarch64: [ OFF ]
        ...   pthread-attr-setaffinity-np: [ on  ]
        ...               pthread-barrier: [ on  ]
        ...            stackprotector-all: [ on  ]
        ...                       timerfd: [ on  ]
        ...                  sched_getcpu: [ on  ]
        ...                           sdt: [ on  ]
        ...                         setns: [ on  ]

        Makefile.config:459: No libunwind found. Please install 
libunwind-dev[el] >= 1.1 and/or set LIBUNWIND_DIR
        ...                        bionic: [ OFF ]
        ...                    compile-32: [ on  ]
        ...                   compile-x32: [ OFF ]
        ...                cplus-demangle: [ on  ]
        ...                         hello: [ OFF ]
        ...                 libbabeltrace: [ on  ]
        ...                       liberty: [ on  ]
        ...                     liberty-z: [ on  ]
        ...         libunwind-debug-frame: [ OFF ]
        ...     libunwind-debug-frame-arm: [ OFF ]
        ... libunwind-debug-frame-aarch64: [ OFF ]
        ...                        prefix: /home/jolsa
        ...                        bindir: /home/jolsa/bin
        ...                        libdir: /home/jolsa/lib64
        ...                    sysconfdir: /home/jolsa/etc
        ...                 LIBUNWIND_DIR: 
        ...                     LIBDW_DIR: 
        ...                          JDIR: 
/usr/lib/jvm/java-1.8.0-openjdk-1.8.0.151-1.b12.fc26.x86_64
        ...     DWARF post unwind library: libdw


jirka

---
diff --git a/tools/perf/Makefile.config b/tools/perf/Makefile.config
index 12dec6ea5ed2..92265b32dddd 100644
--- a/tools/perf/Makefile.config
+++ b/tools/perf/Makefile.config
@@ -947,6 +947,10 @@ define print_var_code
 endef
 
 ifeq ($(VF),1)
+  # Display EXTRA features which are detected manualy
+  # from here with feature_check call and thus cannot
+  # be partof global state output.
+  $(foreach feat,$(FEATURE_TESTS_EXTRA),$(call feature_print_status,$(feat),))
   $(call print_var,prefix)
   $(call print_var,bindir)
   $(call print_var,libdir)

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