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linux_dsm_epyc7002/tools/perf
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Arnaldo Carvalho de Melo 1703f2c321 perf tools: Check if /dev/null can be used as the -o gcc argument 
At least on Debian PARISC64, using:

acme@parisc:~/git/linux-2.6-tip$ gcc -v
Using built-in specs.
Target: hppa-linux-gnu
Configured with: ../src/configure -v --with-pkgversion='Debian
4.3.4-6' --with-bugurl=file:///usr/share/doc/gcc-4.3/README.Bugs
--enable-languages=c,c++,fortran,objc,obj-c++ --prefix=/usr
--enable-shared --enable-multiarch --enable-linker-build-id --with-system-zlib --libexecdir=/usr/lib --without-included-gettext --enable-threads=posix --enable-nls --with-gxx-include-dir=/usr/include/c++/4.3 --program-suffix=-4.3 --enable-clocale=gnu --enable-libstdcxx-debug --enable-objc-gc --enable-mpfr --disable-libssp --enable-checking=release --build=hppa-linux-gnu --host=hppa-linux-gnu --target=hppa-linux-gnu Thread model: posix gcc version 4.3.4 (Debian 4.3.4-6)

there are issues about using 'gcc -o /dev/null':

/usr/bin/ld: final link failed: File truncated
collect2: ld returned 1 exit status

So we test that and use /dev/null in environments where it
works, while using an .INTERMEDIATE file on those where it can't
be used, so that the .perf.dev.null file can be used instead and
then deleted when make exits.

Researched-with: Kyle McMartin <kyle@mcmartin.ca>
Researched-with: Mauro Carvalho Chehab <mchehab@redhat.com>
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Cc: Frédéric Weisbecker <fweisbec@gmail.com>
Cc: Mike Galbraith <efault@gmx.de>
Cc: Peter Zijlstra <a.p.zijlstra@chello.nl>
Cc: Paul Mackerras <paulus@samba.org>
LKML-Reference: <1263293910-8484-2-git-send-email-acme@infradead.org>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
2010-01-13 10:08:12 +01:00
..
bench perf sched: Fix build failure on sparc 2009-12-14 08:59:12 +01:00
Documentation perf diff: Use perf_session__fprintf_hists just like 'perf record' 2009-12-16 16:53:37 +01:00
scripts/perl perf trace/scripting: List available scripts 2009-12-15 10:31:32 +01:00
util perf session: Make events_stats u64 to avoid overflow on 32-bit arches 2009-12-18 16:22:52 +01:00
.gitignore perf tools: Add perf.data to .gitignore 2009-11-24 16:37:01 +01:00
builtin-annotate.c perf symbols: Move symbol filtering to event__preprocess_sample() 2009-12-16 08:53:49 +01:00
builtin-bench.c perf bench: Add "all" pseudo subsystem and "all" pseudo suite 2009-12-14 08:51:19 +01:00
builtin-buildid-list.c perf diff: Fix usage array, it must end with a NULL entry 2009-12-18 20:01:52 +01:00
builtin-diff.c perf diff: Fix usage array, it must end with a NULL entry 2009-12-18 20:01:52 +01:00
builtin-help.c perf tools: Introduce zalloc() for the common calloc(1, N) case 2009-11-24 16:37:02 +01:00
builtin-kmem.c perf kmem: Fix statistics typo 2009-12-28 10:31:56 +01:00
builtin-list.c perf list: Fix large list output by using the pager 2009-08-13 09:05:48 +02:00
builtin-probe.c perf probe: Check whether debugfs path is correct 2009-12-17 09:42:43 +01:00
builtin-record.c perf record: We should fork only if a program was specified to run 2009-12-28 09:02:50 +01:00
builtin-report.c perf diff: Fix usage array, it must end with a NULL entry 2009-12-18 20:01:52 +01:00
builtin-sched.c perf symbols: Make symbol_conf global 2009-12-16 08:53:48 +01:00
builtin-stat.c perf stat: Do not print ratio when task-clock event is not counted 2009-11-15 15:25:50 +01:00
builtin-timechart.c perf symbols: Adopt the strlists for dso, comm 2009-12-16 08:53:49 +01:00
builtin-top.c perf symbols: Move symbol filtering to event__preprocess_sample() 2009-12-16 08:53:49 +01:00
builtin-trace.c perf diff: Fix usage array, it must end with a NULL entry 2009-12-18 20:01:52 +01:00
builtin.h perf diff: Introduce tool to show performance difference 2009-12-15 08:50:29 +01:00
command-list.txt perf diff: Introduce tool to show performance difference 2009-12-15 08:50:29 +01:00
CREDITS
design.txt perf: Rename perf_event_hw_event in design document 2009-12-28 09:14:37 +01:00
Makefile perf tools: Check if /dev/null can be used as the -o gcc argument 2010-01-13 10:08:12 +01:00
perf.c perf diff: Introduce tool to show performance difference 2009-12-15 08:50:29 +01:00
perf.h perf tools: Allow building for ARM 2009-12-11 13:50:21 +01:00