perf build: Remove FEATURE_CHECK_LDFLAGS-disassembler-{four-args,init-styled} setting

As the building mechanism is now able to retry detection with different
combinations of linking flags, setting
FEATURE_CHECK_LDFLAGS-disassembler-four-args and
FEATURE_CHECK_LDFLAGS-disassembler-init-styled is not necessary anymore,
so remove it.

Committer notes:

Use the same technique to find the set of bfd-related libraries to link as in:

  3308ffc5016e6136 ("tools, build: Retry detection of bfd-related features")

Signed-off-by: Roberto Sassu <roberto.sassu@huawei.com>
Cc: Alexei Starovoitov <ast@kernel.org>
Cc: Andres Freund <andres@anarazel.de>
Cc: Andrii Nakryiko <andrii@kernel.org>
Cc: Daniel Borkmann <daniel@iogearbox.net>
Cc: Ingo Molnar <mingo@redhat.com>
Cc: John Fastabend <john.fastabend@gmail.com>
Cc: KP Singh <kpsingh@kernel.org>
Cc: Martin KaFai Lau <martin.lau@linux.dev>
Cc: Nathan Chancellor <nathan@kernel.org>
Cc: Nick Desaulniers <ndesaulniers@google.com>
Cc: Nick Terrell <terrelln@fb.com>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Quentin Monnet <quentin@isovalent.com>
Cc: Song Liu <song@kernel.org>
Cc: Stanislav Fomichev <sdf@google.com>
Cc: bpf@vger.kernel.org
Cc: llvm@lists.linux.dev
Link: https://lore.kernel.org/r/20220719170555.2576993-3-roberto.sassu@huawei.com
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>

diff --git a/tools/perf/Makefile.config b/tools/perf/Makefile.config
index 23648ea..0661a1c 100644 (file)
--- a/tools/perf/Makefile.config
+++ b/tools/perf/Makefile.config
@@ -297,9 +297,6 @@ FEATURE_CHECK_LDFLAGS-libpython := $(PYTHON_EMBED_LDOPTS)
 
 FEATURE_CHECK_LDFLAGS-libaio = -lrt
 
-FEATURE_CHECK_LDFLAGS-disassembler-four-args = -lbfd -lopcodes -ldl
-FEATURE_CHECK_LDFLAGS-disassembler-init-styled = -lbfd -lopcodes -ldl
-
 CORE_CFLAGS += -fno-omit-frame-pointer
 CORE_CFLAGS += -ggdb3
 CORE_CFLAGS += -funwind-tables
@@ -329,8 +326,8 @@ ifneq ($(TCMALLOC),)
 endif
 
 ifeq ($(FEATURES_DUMP),)
-# We will display at the end of this Makefile.config, using $(call feature_display_entries)
-# As we may retry some feature detection here, see the disassembler-four-args case, for instance
+# We will display at the end of this Makefile.config, using $(call feature_display_entries),
+# as we may retry some feature detection here.
   FEATURE_DISPLAY_DEFERRED := 1
 include $(srctree)/tools/build/Makefile.feature
 else
@@ -924,13 +921,9 @@ ifndef NO_LIBBFD
 
     ifeq ($(feature-libbfd-liberty), 1)
       EXTLIBS += -lbfd -lopcodes -liberty
-      FEATURE_CHECK_LDFLAGS-disassembler-four-args += -liberty -ldl
-      FEATURE_CHECK_LDFLAGS-disassembler-init-styled += -liberty -ldl
     else
       ifeq ($(feature-libbfd-liberty-z), 1)
         EXTLIBS += -lbfd -lopcodes -liberty -lz
-        FEATURE_CHECK_LDFLAGS-disassembler-four-args += -liberty -lz -ldl
-        FEATURE_CHECK_LDFLAGS-disassembler-init-styled += -liberty -lz -ldl
       endif
     endif
     $(call feature_check,disassembler-four-args)
@@ -1356,7 +1349,7 @@ endif
 
 # re-generate FEATURE-DUMP as we may have called feature_check, found out
 # extra libraries to add to LDFLAGS of some other test and then redo those
-# tests, see the block about libbfd, disassembler-four-args, for instance.
+# tests.
 $(shell rm -f $(FEATURE_DUMP_FILENAME))
 $(foreach feat,$(FEATURE_TESTS),$(shell echo "$(call feature_assign,$(feat))" >> $(FEATURE_DUMP_FILENAME)))