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James Clark 23716d7614 perf tools: Use Python devtools for version autodetection rather than runtime 
[ Upstream commit 630af16eee495f583db5202c3613d1b191f10694 ]

This fixes the issue where the build will fail if only the Python2
runtime is installed but the Python3 devtools are installed. Currently
the workaround is 'make PYTHON=python3'.

Fix it by autodetecting Python based on whether python[x]-config exists
rather than just python[x] because both are needed for the build. Then
-config is stripped to find the Python runtime.

Testing
=======

 * Auto detect links with Python3 when the v3 devtools are installed
   and only Python 2 runtime is installed
 * Auto detect links with Python2 when both devtools are installed
 * Sensible warning is printed if no Python devtools are installed
 * 'make PYTHON=x' still automatically sets PYTHON_CONFIG=x-config
 * 'make PYTHON=x' fails if x-config doesn't exist
 * 'make PYTHON=python3' overrides Python2 devtools
 * 'make PYTHON=python2' overrides Python3 devtools
 * 'make PYTHON_CONFIG=x-config' works
 * 'make PYTHON=x PYTHON_CONFIG=x' works
 * 'make PYTHON=missing' reports an error
 * 'make PYTHON_CONFIG=missing' reports an error

Fixes: 79373082fa ("perf python: Autodetect python3 binary")
Signed-off-by: James Clark <james.clark@arm.com>
Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com>
Cc: James Clark <james.clark@arm.com>
Cc: Jiri Olsa <jolsa@kernel.org>
Cc: Mark Rutland <mark.rutland@arm.com>
Cc: Namhyung Kim <namhyung@kernel.org>
Link: https://lore.kernel.org/r/20220309194313.3350126-2-james.clark@arm.com
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>
2022-06-09 10:21:05 +02:00
..
accounting
arch x86/speculation: Rename RETPOLINE_AMD to RETPOLINE_LFENCE 2022-03-11 12:11:49 +01:00
bootconfig tools/bootconfig: Fix tracing_on option checking in ftrace2bconf.sh 2021-09-26 14:08:59 +02:00
bpf tools/resolve_btfids: Do not print any commands when building silently 2022-02-08 18:30:39 +01:00
build tools build: Use $(shell ) instead of `` to get embedded libperl's ccopts 2022-04-13 21:01:10 +02:00
cgroup tools/cgroup/slabinfo.py: updated to work on current kernel 2021-05-07 11:04:31 +02:00
debugging
edid
firewire
firmware
gpio tools: gpio: fix %llu warning in gpio-watch.c 2021-01-27 11:55:20 +01:00
hv
iio
include bpf: Fix comment for helper bpf_current_task_under_cgroup() 2022-04-08 14:40:43 +02:00
io_uring
kvm/kvm_stat tools/kvm_stat: Add restart delay 2021-04-16 11:43:20 +02:00
laptop
leds
lib libbpf: Fix logic for finding matching program for CO-RE relocation 2022-06-09 10:21:03 +02:00
memory-model
objtool objtool: Fix static_call list generation 2021-11-18 14:04:02 +01:00
pci
pcmcia
perf perf tools: Use Python devtools for version autodetection rather than runtime 2022-06-09 10:21:05 +02:00
power tools/power turbostat: fix ICX DRAM power numbers 2022-06-09 10:20:51 +02:00
scripts tools: Allow proper CC/CXX/... override with LLVM=1 in Makefile.include 2021-07-31 08:16:10 +02:00
spi
testing selftests/resctrl: Fix null pointer dereference on open failed 2022-06-09 10:21:03 +02:00
thermal/tmon tools/thermal/tmon: Add cross compiling support 2021-09-18 13:40:07 +02:00
time
usb usb: testusb: Fix for showing the connection speed 2021-10-09 14:40:56 +02:00
virtio tools/virtio: compile with -pthread 2022-05-25 09:17:53 +02:00
vm tools/vm/page-types: remove dependency on opt_file for idle page tracking 2021-10-09 14:40:57 +02:00
wmi
Makefile