tools/perf/build: Speed up auto-detection

The detection of certain rarely detected features can be delayed
to when they are actually needed.

So speed up the common case of auto-detection by pre-building only
a core set of features and populating only their feature-flags.

[ Features not listed in CORE_FEATURES need to built explicitly
  via the feature_check() function. ]

(Also order the feature names alphabetically, while at it.)

Cc: Arnaldo Carvalho de Melo <acme@redhat.com>
Cc: Peter Zijlstra <a.p.zijlstra@chello.nl>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: David Ahern <dsahern@gmail.com>
Cc: Jiri Olsa <jolsa@redhat.com>
Link: http://lkml.kernel.org/n/tip-xQkuveknd0gqla1dfxrqKpkl@git.kernel.org
Signed-off-by: Ingo Molnar <mingo@kernel.org>

1 files changed, 16 insertions, 15 deletions

diff --git a/tools/perf/config/feature-checks/Makefile b/tools/perf/config/feature-checks/Makefile
index 4b855e0ccd0b..d4c55acc82bb 100644
--- a/tools/perf/config/feature-checks/Makefile
+++ b/tools/perf/config/feature-checks/Makefile
@@ -1,28 +1,29 @@
 
 FILES=                                  \
-        test-hello                      \
-        test-stackprotector-all         \
-        test-stackprotector             \
-        test-volatile-register-var      \
-        test-fortify-source             \
+        test-all                        \
+        test-backtrace                  \
         test-bionic                     \
-        test-libelf                     \
-        test-glibc                      \
         test-dwarf                      \
-        test-libelf-mmap                \
-        test-libelf-getphdrnum          \
-        test-libunwind                  \
-        test-libaudit                   \
-        test-libslang                   \
+        test-fortify-source             \
+        test-glibc                      \
         test-gtk2                       \
         test-gtk2-infobar               \
+        test-hello                      \
+        test-libaudit                   \
+        test-libbfd                     \
+        test-libelf                     \
+        test-libelf-getphdrnum          \
+        test-libelf-mmap                \
+        test-libnuma                    \
         test-libperl                    \
         test-libpython                  \
         test-libpython-version          \
-        test-libbfd                     \
+        test-libslang                   \
+        test-libunwind                  \
         test-on-exit                    \
-        test-backtrace                  \
-        test-libnuma
+        test-stackprotector-all         \
+        test-stackprotector             \
+        test-volatile-register-var
 
 CC := $(CC) -MD