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SubjectRe: [PATCHv2 00/36] perf tools: New build framework
Hi,

[...]

> > > > I just tried a cross-build for arm, and that blew up when trying to do
> > > > something with arch/arm/util/libperf-in.o (log below). I bisected that
> > > > to f169fbc4c59dd9d4 "perf build: Add arch x86 objects building". I'm
> > > > looking into why now.
> > >
> > > I get a similar failure doing a native arm64 build. I think the problem is
> > > because the arch/ files for arm and arm64 aren't always required (i.e. there
> > > are configurations where nothing is built under there) and, consequently,
> > > libperf-in.o isn't actually needed and we try to link against something that
> > > doesn't exist.
> >
> > exactly ;-) I'll spin v3 shortly..
>
> this fixes the issue for me
>
> jirka
>
>
> ---
> diff --git a/tools/build/Makefile.build b/tools/build/Makefile.build
> index d35b66014992..396b33b124d1 100644
> --- a/tools/build/Makefile.build
> +++ b/tools/build/Makefile.build
> @@ -52,7 +52,7 @@ quiet_cmd_cc_s_c = AS $@
>
> # Link agregate command
> quiet_cmd_ld_multi = LD $@
> - cmd_ld_multi = $(LD) -r -o $@ $^
> + cmd_ld_multi = $(LD) -r -o $@ $(wildcard $^)
>
> # Build rules
> $(OUTPUT)%.o: %.c FORCE
>

Unfortunately that doesn't seem to be sufficient for me when
cross-compiling. It looks like it supresses the warning from Make, but
then LD explodes anyway because it wasn't provided any input files (log
below).

Thanks,
Mark.

[mark@leverpostej:~/src/linux/tools/perf]% uselinaro 14.09 make ARCH=arm CROSS_COMPILE=arm-linux-gnueabihf-
BUILD: Doing 'make -j8' parallel build
config/Makefile:341: No libelf found, disables 'probe' tool, please install elfutils-libelf-devel/libelf-dev
config/Makefile:417: Disabling post unwind, no support found.
config/Makefile:458: No libaudit.h found, disables 'trace' tool, please install audit-libs-devel or libaudit-dev
config/Makefile:473: slang not found, disables TUI support. Please install slang-devel or libslang-dev
config/Makefile:487: GTK2 not found, disables GTK2 support. Please install gtk2-devel or libgtk2.0-dev
config/Makefile:515: Missing perl devel files. Disabling perl scripting support, consider installing perl-ExtUtils-Embed
config/Makefile:560: No Python.h (for Python 2.x) was found
config/Makefile:560: Python support will not be built
config/Makefile:653: No numa.h found, disables 'perf bench numa mem' benchmark, please install numactl-devel/libnuma-devel/libnuma-dev

Auto-detecting system features:
... dwarf: [ OFF ]
... glibc: [ on ]
... gtk2: [ OFF ]
... libaudit: [ OFF ]
... libbfd: [ OFF ]
... libelf: [ OFF ]
... libnuma: [ OFF ]
... libperl: [ OFF ]
... libpython: [ OFF ]
... libslang: [ OFF ]
... libunwind: [ OFF ]
... libdw-dwarf-unwind: [ OFF ]
... zlib: [ OFF ]

SUBDIR /home/mark/src/linux/tools/lib/api/
FLAGS: * new build flags or prefix
GEN common-cmds.h
MKDIR libapi_dirs
SUBDIR /home/mark/src/linux/tools/lib/traceevent/
CC fs/debugfs.o
CC arch/common.o
CC fs/fs.o
CC fd/array.o
CC util/abspath.o
FLAGS: * new build flags or cross compiler
CC ui/setup.o
CC ui/helpline.o
CC ui/progress.o
AR libapikfs.a
CC util/alias.o
CC util/annotate.o
CC ui/util.o
CC ui/hist.o
CC ui/stdio/hist.o
PERF_VERSION = 3.19.rc2.gb7973a
CC builtin-bench.o
LD arch/libperf-in.o
arm-linux-gnueabihf-ld: no input files
make[3]: *** [arch/libperf-in.o] Error 1
make[2]: *** [arch] Error 2
make[2]: *** Waiting for unfinished jobs....
CC builtin-annotate.o
CC util/build-id.o
CC FPIC event-parse.o
CC FPIC event-plugin.o
CC FPIC trace-seq.o
CC builtin-diff.o
CC FPIC parse-filter.o
CC builtin-evlist.o
CC util/config.o
CC util/ctype.o
CC FPIC parse-utils.o
CC util/db-export.o
CC FPIC kbuffer-parse.o
CC builtin-help.o
CC util/environment.o
CC FPIC plugin_jbd2.o
CC FPIC plugin_hrtimer.o
CC util/event.o
CC FPIC plugin_kmem.o
CC FPIC plugin_kvm.o
CC FPIC plugin_mac80211.o
CC util/evlist.o
CC FPIC plugin_sched_switch.o
CC builtin-sched.o
CC util/evsel.o
CC util/exec_cmd.o
CC FPIC plugin_function.o
CC FPIC plugin_xen.o
CC builtin-buildid-list.o
CC FPIC plugin_scsi.o
CC FPIC plugin_cfg80211.o
CC builtin-buildid-cache.o
LINK libtraceevent.a
LINK plugin_jbd2.so
GEN perf-archive
CC util/find_next_bit.o
LINK plugin_hrtimer.so
LINK plugin_kmem.so
LINK plugin_kvm.so
CC util/help.o
LINK plugin_mac80211.so
CC util/kallsyms.o
LINK plugin_sched_switch.so
LINK plugin_function.so
LINK plugin_xen.so
LD ui/libperf-in.o
CC builtin-list.o
arm-linux-gnueabihf-ld: no input files
make[3]: *** [ui/libperf-in.o] Error 1
make[2]: *** [ui] Error 2
CC builtin-record.o
LINK plugin_scsi.so
LINK plugin_cfg80211.so
GEN perf-with-kcore
CC builtin-report.o
CC builtin-stat.o
CC builtin-timechart.o
CC util/levenshtein.o
CC builtin-top.o
CC builtin-script.o
CC builtin-kmem.o
CC builtin-lock.o
CC util/parse-options.o
CC builtin-kvm.o
CC builtin-inject.o
CC builtin-mem.o
CC bench/sched-messaging.o
CC tests/builtin-test.o
CC perf.o
BISON util/parse-events-bison.c
CC util/path.o
CC util/rbtree.o
CC util/bitmap.o
CC tests/parse-events.o
CC bench/sched-pipe.o
CC util/hweight.o
CC util/run-command.o
CC bench/mem-memcpy.o
CC bench/futex-hash.o
CC bench/futex-wake.o
CC util/quote.o
CC bench/futex-requeue.o
CC tests/dso-data.o
CC util/strbuf.o
CC util/string.o
CC util/strlist.o
CC tests/attr.o
CC tests/vmlinux-kallsyms.o
LD bench/perf-in.o
arm-linux-gnueabihf-ld: no input files
make[3]: *** [bench/perf-in.o] Error 1
make[2]: *** [bench] Error 2
make[2]: *** Waiting for unfinished jobs....
CC tests/open-syscall.o
CC util/strfilter.o
CC util/top.o
CC util/usage.o
CC tests/open-syscall-all-cpus.o
CC tests/open-syscall-tp-fields.o
CC tests/mmap-basic.o
CC tests/perf-record.o
CC util/wrapper.o
CC tests/rdpmc.o
CC util/sigchain.o
CC tests/evsel-roundtrip-name.o
CC tests/evsel-tp-sched.o
CC tests/fdarray.o
CC util/dso.o
CC tests/pmu.o
CC tests/hists_common.o
CC util/symbol.o
CC tests/hists_link.o
CC tests/hists_filter.o
CC tests/hists_output.o
CC tests/hists_cumulate.o
CC tests/python-use.o
CC tests/bp_signal.o
CC util/color.o
CC tests/bp_signal_overflow.o
CC tests/task-exit.o
CC util/pager.o
CC util/header.o
CC util/callchain.o
CC tests/sw-clock.o
CC tests/mmap-thread-lookup.o
CC util/values.o
CC tests/thread-mg-share.o
CC tests/switch-tracking.o
CC tests/keep-tracking.o
CC tests/code-reading.o
CC util/debug.o
CC tests/sample-parsing.o
CC util/machine.o
CC tests/parse-no-sample-id-all.o
CC util/map.o
CC util/pstack.o
CC util/session.o
CC util/ordered-events.o
LD tests/perf-in.o
arm-linux-gnueabihf-ld: no input files
make[3]: *** [tests/perf-in.o] Error 1
make[2]: *** [tests] Error 2
make[1]: *** [perf-in.o] Error 2
make[1]: *** Waiting for unfinished jobs....
CC util/comm.o
CC util/thread.o
CC util/thread_map.o
CC util/trace-event-parse.o
CC util/parse-events-bison.o
BISON util/pmu-bison.c
CC util/trace-event-read.o
CC util/trace-event-info.o
CC util/trace-event-scripting.o
CC util/trace-event.o
CC util/svghelper.o
CC util/sort.o
CC util/hist.o
CC util/util.o
CC util/xyarray.o
CC util/cpumap.o
CC util/cgroup.o
CC util/target.o
CC util/rblist.o
CC util/intlist.o
CC util/vdso.o
CC util/stat.o
CC util/record.o
CC util/srcline.o
CC util/data.o
CC util/tsc.o
CC util/cloexec.o
CC util/thread-stack.o
CC util/symbol-minimal.o
CC util/perf_regs.o
FLEX util/parse-events-flex.c
FLEX util/pmu-flex.c
CC util/pmu-bison.o
CC util/parse-events.o
CC util/parse-events-flex.o
CC util/pmu.o
CC util/pmu-flex.o
LD util/libperf-in.o
arm-linux-gnueabihf-ld: no input files
make[3]: *** [util/libperf-in.o] Error 1
make[2]: *** [util] Error 2
make[1]: *** [libperf-in.o] Error 2
make: *** [all] Error 2


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