Em Fri, Nov 10, 2017 at 10:43:25AM +0100, Jiri Olsa escreveu: > On Thu, Nov 09, 2017 at 09:52:12AM -0300, Arnaldo Carvalho de Melo wrote: > > Em Thu, Nov 09, 2017 at 08:36:22AM +0100, Jiri Olsa escreveu: > > > On Wed, Nov 08, 2017 at 01:03:21PM -0300, Arnaldo Carvalho de Melo wrote: > > > > Em Wed, Nov 08, 2017 at 11:27:38AM +0100, Jiri Olsa escreveu: > > > > > Mainly it's caused by perl/python objects being compiled with:
> > > > > -specs=/usr/lib/rpm/redhat/redhat-hardened-cc1 > > > > > which prevent the final link impossible, because it will check > > > > > for 'proper' objects with following option: > > > > > -specs=/usr/lib/rpm/redhat/redhat-hardened-ld > > > > > Fixing this by using the perl/python CFLAGS/LDFLAGS options > > > > > for all the objects. > > > > Humm, so we're basically using the hardened config only we build with > > > > PERL or PYTHON, should we use that always, i.e. ask the distro what set > > > > of flags we should use? > > > right, I think this needs to be detected like we do for features, > > > since there maybe some supported gcc versions to detect > > Right, since we want to honour what the distro makers decided was the > > best set for them, and to be able to link with other libraries, etc. > > But then I think this should be done more explicitely, right? Do you > > envision some way to do that without having to try to build perl or > > python, that may not be installed, etc? > I'll check on it.. I think we could use feature detection and > enable that by default and add NO_HARDENED_BUILD variable as > we do for features.. and detect that python/perl or whatever > else is using that and warn I stumbled it on a recently created perf build container for fedora 27: fedora:27 Downloading http://192.168.124.1/perf/perf-4.14.0.tar.xz... % Total % Received % Xferd Average Speed Time Time Time Current Dload Upload Total Spent Left Speed make: Entering directory '/git/linux/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: [ 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 ] Makefile.config:813: No openjdk development package found, please install JDK package GEN /tmp/build/perf/common-cmds.h PERF_VERSION = 4.14.geae86e MKDIR /tmp/build/perf/fd/ CC /tmp/build/perf/fd/array.o CC /tmp/build/perf/exec-cmd.o CC /tmp/build/perf/util/parse-events-flex.o <SNIP> 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 LINK /tmp/build/perf/libperf-gtk.so /usr/bin/ld: /tmp/build/perf/perf-in.o: relocation R_X86_64_32 against `.rodata.str1.1' can not be used when making a shared object; recompile with -fPIC /usr/bin/ld: /tmp/build/perf/libperf.a(libperf-in.o): relocation R_X86_64_32S against `.text' can not be used when making a shared object; recompile with -fPIC /usr/bin/ld: final link failed: Nonrepresentable section on output collect2: error: ld returned 1 exit status make[2]: *** [Makefile.perf:507: /tmp/build/perf/perf] Error 1 make[1]: *** [Makefile.perf:210: sub-make] Error 2 make: *** [Makefile:70: all] Error 2 make: Leaving directory '/git/linux/tools/perf'
