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SubjectRe: [PATCH 2/3] perf tools: Fix build for hardened environments
On Fri, Dec 01, 2017 at 11:11:37AM +0900, Namhyung Kim wrote:
> Hi Jiri,
>
> On Wed, Nov 08, 2017 at 11:27:38AM +0100, Jiri Olsa wrote:
> > From: Jiri Olsa <jolsa@redhat.com>
> >
> > On Fedora systems the perl and python CFLAGS/LDFLAGS include the
> > hardened specs from redhat-rpm-config package. We apply them only
> > for perl/python objects, which makes them not compatible with the
> > rest of the objects and the build fails with:
> >
> > /usr/bin/ld: 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: 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: perf] Error 1
> > make[1]: *** [Makefile.perf:210: sub-make] Error 2
> > make: *** [Makefile:69: all] Error 2
> >
> > 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
>
> Just for curiousity, could you please show me the contents of the two
> files? (Are they big?)

# cat /usr/lib/rpm/redhat/redhat-hardened-ld
*self_spec:
+ %{!static:%{!shared:%{!r:-pie}}}

*link:
+ -z now


# cat /usr/lib/rpm/redhat/redhat-hardened-cc1
*cc1_options:
+ %{!r:%{!fpie:%{!fPIE:%{!fpic:%{!fPIC:%{!fno-pic:-fPIE}}}}}}


jirka

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