From 3b4e4efe88f615f160a6c9319a9392d8410f742c Mon Sep 17 00:00:00 2001
From: Ian Rogers <irogers@google.com>
Date: Fri, 10 Mar 2023 22:57:49 -0800
Subject: perf symbol: Add abi::__cxa_demangle C++ demangling support
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Refactor C++ demangling out of symbol-elf into its own files similar
to other languages. Add abi::__cxa_demangle support. As the other
demanglers are not shippable with distributions, this brings back C++
demangling in a common case. It isn't perfect as the support for
optionally demangling arguments and modifiers isn't present.

Signed-off-by: Ian Rogers <irogers@google.com>
Cc: Adrian Hunter <adrian.hunter@intel.com>
Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com>
Cc: Andres Freund <andres@anarazel.de>
Cc: Ingo Molnar <mingo@redhat.com>
Cc: Jiri Olsa <jolsa@kernel.org>
Cc: Leo Yan <leo.yan@linaro.org>
Cc: Mark Rutland <mark.rutland@arm.com>
Cc: Martin Liška <mliska@suse.cz>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Nathan Chancellor <nathan@kernel.org>
Cc: Nick Desaulniers <ndesaulniers@google.com>
Cc: Pavithra Gurushankar <gpavithrasha@gmail.com>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Quentin Monnet <quentin@isovalent.com>
Cc: Roberto Sassu <roberto.sassu@huawei.com>
Cc: Stephane Eranian <eranian@google.com>
Cc: Tiezhu Yang <yangtiezhu@loongson.cn>
Cc: Tom Rix <trix@redhat.com>
Cc: Yang Jihong <yangjihong1@huawei.com>
Cc: llvm@lists.linux.dev
Link: https://lore.kernel.org/r/20230311065753.3012826-2-irogers@google.com
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
---
 tools/perf/Makefile.config | 29 ++++++++++++++---------------
 1 file changed, 14 insertions(+), 15 deletions(-)

(limited to 'tools/perf/Makefile.config')

diff --git a/tools/perf/Makefile.config b/tools/perf/Makefile.config
index c4ae70c643b9..ac8a206acf87 100644
--- a/tools/perf/Makefile.config
+++ b/tools/perf/Makefile.config
@@ -914,6 +914,7 @@ ifdef BUILD_NONDISTRO
   endif
 
   CFLAGS += -DHAVE_LIBBFD_SUPPORT
+  CXXFLAGS += -DHAVE_LIBBFD_SUPPORT
   ifeq ($(feature-libbfd-buildid), 1)
     CFLAGS += -DHAVE_LIBBFD_BUILDID_SUPPORT
   else
@@ -921,26 +922,24 @@ ifdef BUILD_NONDISTRO
   endif
 endif
 
-ifdef NO_DEMANGLE
-  CFLAGS += -DNO_DEMANGLE
-else
+ifndef NO_DEMANGLE
+  $(call feature_check,cxa-demangle)
+  ifeq ($(feature-cxa-demangle), 1)
+    EXTLIBS += -lstdc++
+    CFLAGS += -DHAVE_CXA_DEMANGLE_SUPPORT
+    CXXFLAGS += -DHAVE_CXA_DEMANGLE_SUPPORT
+  endif
   ifdef BUILD_NONDISTRO
     ifeq ($(filter -liberty,$(EXTLIBS)),)
-      ifdef HAVE_CPLUS_DEMANGLE_SUPPORT
+      $(call feature_check,cplus-demangle)
+      ifeq ($(feature-cplus-demangle), 1)
         EXTLIBS += -liberty
-      else
-        $(call feature_check,cplus-demangle)
-        ifeq ($(feature-cplus-demangle), 1)
-          EXTLIBS += -liberty
-        endif
       endif
     endif
-  endif
-
-  ifneq ($(filter -liberty,$(EXTLIBS)),)
-    CFLAGS += -DHAVE_CPLUS_DEMANGLE_SUPPORT
-  else
-    CFLAGS += -DNO_DEMANGLE
+    ifneq ($(filter -liberty,$(EXTLIBS)),)
+      CFLAGS += -DHAVE_CPLUS_DEMANGLE_SUPPORT
+      CXXFLAGS += -DHAVE_CPLUS_DEMANGLE_SUPPORT
+    endif
   endif
 endif
 
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