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09e6f9f983
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Arnaldo Carvalho de Melo 09e6f9f983 perf python: Fix splitting CC into compiler and options 
Noticed this build failure on archlinux:base when building with clang:

  clang-14: error: optimization flag '-ffat-lto-objects' is not supported [-Werror,-Wignored-optimization-argument]

In tools/perf/util/setup.py we check if clang supports that option, but
since commit 3cad53a6f9 ("perf python: Account for multiple words
in CC") this got broken as in the common case where CC="clang":

  >>> cc="clang"
  >>> print(cc.split()[0])
  clang
  >>> option="-ffat-lto-objects"
  >>> print(str(cc.split()[1:]) + option)
  []-ffat-lto-objects
  >>>

And then the Popen will call clang with that bogus option name that in
turn will not produce the b"unknown argument" or b"is not supported"
that this function uses to detect if the option is not available and
thus later on clang will be called with an unknown/unsupported option.

Fix it by looking if really there are options in the provided CC
variable, and if so override 'cc' with the first token and append the
options to the 'option' variable.

Fixes: 3cad53a6f9 ("perf python: Account for multiple words in CC")
Cc: Adrian Hunter <adrian.hunter@intel.com>
Cc: Fangrui Song <maskray@google.com>
Cc: Florian Fainelli <f.fainelli@gmail.com>
Cc: Ian Rogers <irogers@google.com>
Cc: Jiri Olsa <jolsa@kernel.org>
Cc: John Keeping <john@metanate.com>
Cc: Khem Raj <raj.khem@gmail.com>
Cc: Leo Yan <leo.yan@linaro.org>
Cc: Michael Petlan <mpetlan@redhat.com>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Nathan Chancellor <nathan@kernel.org>
Cc: Nick Desaulniers <ndesaulniers@google.com>
Cc: Sedat Dilek <sedat.dilek@gmail.com>
Link: http://lore.kernel.org/lkml/Y6Rq5F5NI0v1QQHM@kernel.org
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
2022-12-22 11:34:30 -03:00
..
accounting tools/accounting/procacct: remove some unused variables 2022-11-18 13:55:09 -08:00
arch tools arch x86: Sync the msr-index.h copy with the kernel sources 2022-12-20 14:36:47 -03:00
bootconfig
bpf bpftool: Fix memory leak in do_build_table_cb 2022-12-06 21:20:42 +01:00
build perf bpf: Fix build with libbpf 0.7.0 by checking if bpf_program__set_insns() is available 2022-10-25 17:40:48 -03:00
certs
cgroup
counter
debugging
edid
firewire
firmware
gpio
hv
iio tools: iio: iio_generic_buffer: Fix read size 2022-11-01 08:48:13 +00:00
include tools headers UAPI: Sync linux/kvm.h with the kernel sources 2022-12-20 15:15:57 -03:00
io_uring
kvm/kvm_stat tools/kvm_stat: update exit reasons for vmx/svm/aarch64/userspace 2022-11-09 12:26:52 -05:00
laptop
leds
lib libperf: Fix install_pkgconfig target 2022-12-16 10:04:06 -03:00
memory-model
objtool powerpc updates for 6.2 2022-12-19 07:13:33 -06:00
pci
pcmcia
perf perf python: Fix splitting CC into compiler and options 2022-12-22 11:34:30 -03:00
power ACPI updates for 6.2-rc1 2022-12-12 13:38:17 -08:00
rcu
scripts
spi
testing powerpc updates for 6.2 2022-12-19 07:13:33 -06:00
thermal
time
tracing rtla: Fix exit status when returning from calls to usage() 2022-12-09 18:06:24 -05:00
usb tools: usb: ffs-aio-example: Fix build error with aarch64-*-gnu-gcc toolchain(s) 2022-11-09 12:37:56 +01:00
verification Documentation/rv: Add verification/rv man pages 2022-12-09 18:06:24 -05:00
virtio
vm MM patches for 6.2-rc1. 2022-12-13 19:29:45 -08:00
wmi
Makefile