LLVM 9 (current release is LLVM 13) moved the minimum C++ version to
GNU++14. Bump the version numbers in the feature test and perf build.
Signed-off-by: Ian Rogers <[email protected]>
---
tools/build/feature/Makefile | 6 +++---
tools/perf/Makefile.config | 2 +-
2 files changed, 4 insertions(+), 4 deletions(-)
diff --git a/tools/build/feature/Makefile b/tools/build/feature/Makefile
index d024b5204ba0..19f145a35a43 100644
--- a/tools/build/feature/Makefile
+++ b/tools/build/feature/Makefile
@@ -300,7 +300,7 @@ $(OUTPUT)test-jvmti-cmlr.bin:
$(BUILD)
$(OUTPUT)test-llvm.bin:
- $(BUILDXX) -std=gnu++11 \
+ $(BUILDXX) -std=gnu++14 \
-I$(shell $(LLVM_CONFIG) --includedir) \
-L$(shell $(LLVM_CONFIG) --libdir) \
$(shell $(LLVM_CONFIG) --libs Core BPF) \
@@ -308,12 +308,12 @@ $(OUTPUT)test-llvm.bin:
> $(@:.bin=.make.output) 2>&1
$(OUTPUT)test-llvm-version.bin:
- $(BUILDXX) -std=gnu++11 \
+ $(BUILDXX) -std=gnu++14 \
-I$(shell $(LLVM_CONFIG) --includedir) \
> $(@:.bin=.make.output) 2>&1
$(OUTPUT)test-clang.bin:
- $(BUILDXX) -std=gnu++11 \
+ $(BUILDXX) -std=gnu++14 \
-I$(shell $(LLVM_CONFIG) --includedir) \
-L$(shell $(LLVM_CONFIG) --libdir) \
-Wl,--start-group -lclangBasic -lclangDriver \
diff --git a/tools/perf/Makefile.config b/tools/perf/Makefile.config
index 0ae2e3d8b832..86be3f6ec018 100644
--- a/tools/perf/Makefile.config
+++ b/tools/perf/Makefile.config
@@ -285,7 +285,7 @@ CORE_CFLAGS += -Wall
CORE_CFLAGS += -Wextra
CORE_CFLAGS += -std=gnu99
-CXXFLAGS += -std=gnu++11 -fno-exceptions -fno-rtti
+CXXFLAGS += -std=gnu++14 -fno-exceptions -fno-rtti
CXXFLAGS += -Wall
CXXFLAGS += -fno-omit-frame-pointer
CXXFLAGS += -ggdb3
--
2.33.0.882.g93a45727a2-goog
The parameters to two functions and the location of a variable have
changed in more recent LLVM/clang releases.
Tested with LLVM 6, 8, 9, 10 and 11.
Signed-off-by: Ian Rogers <[email protected]>
---
tools/perf/util/c++/clang.cpp | 20 +++++++++++++-------
1 file changed, 13 insertions(+), 7 deletions(-)
diff --git a/tools/perf/util/c++/clang.cpp b/tools/perf/util/c++/clang.cpp
index c8885dfa3667..756200cb80b1 100644
--- a/tools/perf/util/c++/clang.cpp
+++ b/tools/perf/util/c++/clang.cpp
@@ -44,7 +44,6 @@ createCompilerInvocation(llvm::opt::ArgStringList CFlags, StringRef& Path,
"-triple", "bpf-pc-linux",
"-fsyntax-only",
"-ferror-limit", "19",
- "-fmessage-length", "127",
"-O2",
"-nostdsysteminc",
"-nobuiltininc",
@@ -55,7 +54,11 @@ createCompilerInvocation(llvm::opt::ArgStringList CFlags, StringRef& Path,
"-x", "c"};
CCArgs.append(CFlags.begin(), CFlags.end());
- CompilerInvocation *CI = tooling::newInvocation(&Diags, CCArgs);
+ CompilerInvocation *CI = tooling::newInvocation(&Diags, CCArgs
+#if CLANG_VERSION_MAJOR >= 11
+ ,/*BinaryName=*/nullptr
+#endif
+ );
FrontendOptions& Opts = CI->getFrontendOpts();
Opts.Inputs.clear();
@@ -151,13 +154,16 @@ getBPFObjectFromModule(llvm::Module *Module)
legacy::PassManager PM;
bool NotAdded;
-#if CLANG_VERSION_MAJOR < 7
- NotAdded = TargetMachine->addPassesToEmitFile(PM, ostream,
- TargetMachine::CGFT_ObjectFile);
+ NotAdded = TargetMachine->addPassesToEmitFile(PM, ostream
+#if CLANG_VERSION_MAJOR >= 7
+ , /*DwoOut=*/nullptr
+#endif
+#if CLANG_VERSION_MAJOR < 10
+ , TargetMachine::CGFT_ObjectFile
#else
- NotAdded = TargetMachine->addPassesToEmitFile(PM, ostream, nullptr,
- TargetMachine::CGFT_ObjectFile);
+ , llvm::CGFT_ObjectFile
#endif
+ );
if (NotAdded) {
llvm::errs() << "TargetMachine can't emit a file of this type\n";
return std::unique_ptr<llvm::SmallVectorImpl<char>>(nullptr);
--
2.33.0.882.g93a45727a2-goog
On Mon, Oct 11, 2021 at 4:24 PM Ian Rogers <[email protected]> wrote:
>
> The parameters to two functions and the location of a variable have
> changed in more recent LLVM/clang releases.
>
> Tested with LLVM 6, 8, 9, 10 and 11.
>
> Signed-off-by: Ian Rogers <[email protected]>
> ---
> tools/perf/util/c++/clang.cpp | 20 +++++++++++++-------
> 1 file changed, 13 insertions(+), 7 deletions(-)
>
> diff --git a/tools/perf/util/c++/clang.cpp b/tools/perf/util/c++/clang.cpp
> index c8885dfa3667..756200cb80b1 100644
> --- a/tools/perf/util/c++/clang.cpp
> +++ b/tools/perf/util/c++/clang.cpp
> @@ -44,7 +44,6 @@ createCompilerInvocation(llvm::opt::ArgStringList CFlags, StringRef& Path,
> "-triple", "bpf-pc-linux",
> "-fsyntax-only",
> "-ferror-limit", "19",
> - "-fmessage-length", "127",
Sorry, missed from the commit message. I removed this flag to format
output down to 127 columns as with clang 11 I see in perf test:
58: builtin clang support :
58.1: builtin clang compile C source to IR :
--- start ---
test child forked, pid 279307
error: unknown argument: '-fmessage-length'
1 error generated.
test child finished with -1
The flag isn't necessary for correct operation.
Thanks,
Ian
> "-O2",
> "-nostdsysteminc",
> "-nobuiltininc",
> @@ -55,7 +54,11 @@ createCompilerInvocation(llvm::opt::ArgStringList CFlags, StringRef& Path,
> "-x", "c"};
>
> CCArgs.append(CFlags.begin(), CFlags.end());
> - CompilerInvocation *CI = tooling::newInvocation(&Diags, CCArgs);
> + CompilerInvocation *CI = tooling::newInvocation(&Diags, CCArgs
> +#if CLANG_VERSION_MAJOR >= 11
> + ,/*BinaryName=*/nullptr
> +#endif
> + );
>
> FrontendOptions& Opts = CI->getFrontendOpts();
> Opts.Inputs.clear();
> @@ -151,13 +154,16 @@ getBPFObjectFromModule(llvm::Module *Module)
>
> legacy::PassManager PM;
> bool NotAdded;
> -#if CLANG_VERSION_MAJOR < 7
> - NotAdded = TargetMachine->addPassesToEmitFile(PM, ostream,
> - TargetMachine::CGFT_ObjectFile);
> + NotAdded = TargetMachine->addPassesToEmitFile(PM, ostream
> +#if CLANG_VERSION_MAJOR >= 7
> + , /*DwoOut=*/nullptr
> +#endif
> +#if CLANG_VERSION_MAJOR < 10
> + , TargetMachine::CGFT_ObjectFile
> #else
> - NotAdded = TargetMachine->addPassesToEmitFile(PM, ostream, nullptr,
> - TargetMachine::CGFT_ObjectFile);
> + , llvm::CGFT_ObjectFile
> #endif
> + );
> if (NotAdded) {
> llvm::errs() << "TargetMachine can't emit a file of this type\n";
> return std::unique_ptr<llvm::SmallVectorImpl<char>>(nullptr);
> --
> 2.33.0.882.g93a45727a2-goog
>
On Mon, Oct 11, 2021 at 4:35 PM Ian Rogers <[email protected]> wrote:
>
> On Mon, Oct 11, 2021 at 4:24 PM Ian Rogers <[email protected]> wrote:
> >
> > The parameters to two functions and the location of a variable have
> > changed in more recent LLVM/clang releases.
> >
> > Tested with LLVM 6, 8, 9, 10 and 11.
> >
> > Signed-off-by: Ian Rogers <[email protected]>
> > ---
> > tools/perf/util/c++/clang.cpp | 20 +++++++++++++-------
> > 1 file changed, 13 insertions(+), 7 deletions(-)
> >
> > diff --git a/tools/perf/util/c++/clang.cpp b/tools/perf/util/c++/clang.cpp
> > index c8885dfa3667..756200cb80b1 100644
> > --- a/tools/perf/util/c++/clang.cpp
> > +++ b/tools/perf/util/c++/clang.cpp
> > @@ -44,7 +44,6 @@ createCompilerInvocation(llvm::opt::ArgStringList CFlags, StringRef& Path,
> > "-triple", "bpf-pc-linux",
> > "-fsyntax-only",
> > "-ferror-limit", "19",
> > - "-fmessage-length", "127",
>
> Sorry, missed from the commit message. I removed this flag to format
> output down to 127 columns as with clang 11 I see in perf test:
>
> 58: builtin clang support :
> 58.1: builtin clang compile C source to IR :
> --- start ---
> test child forked, pid 279307
> error: unknown argument: '-fmessage-length'
> 1 error generated.
> test child finished with -1
>
> The flag isn't necessary for correct operation.
Right, I changed the -cc1 option from Separate-form -fmessage-length
to -fmessage-length= in 2020-03.
-ferror-limit can be deleted as well.
> Thanks,
> Ian
>
> > "-O2",
> > "-nostdsysteminc",
> > "-nobuiltininc",
> > @@ -55,7 +54,11 @@ createCompilerInvocation(llvm::opt::ArgStringList CFlags, StringRef& Path,
> > "-x", "c"};
> >
> > CCArgs.append(CFlags.begin(), CFlags.end());
> > - CompilerInvocation *CI = tooling::newInvocation(&Diags, CCArgs);
> > + CompilerInvocation *CI = tooling::newInvocation(&Diags, CCArgs
> > +#if CLANG_VERSION_MAJOR >= 11
> > + ,/*BinaryName=*/nullptr
> > +#endif
> > + );
> >
> > FrontendOptions& Opts = CI->getFrontendOpts();
> > Opts.Inputs.clear();
> > @@ -151,13 +154,16 @@ getBPFObjectFromModule(llvm::Module *Module)
> >
> > legacy::PassManager PM;
> > bool NotAdded;
> > -#if CLANG_VERSION_MAJOR < 7
> > - NotAdded = TargetMachine->addPassesToEmitFile(PM, ostream,
> > - TargetMachine::CGFT_ObjectFile);
> > + NotAdded = TargetMachine->addPassesToEmitFile(PM, ostream
> > +#if CLANG_VERSION_MAJOR >= 7
> > + , /*DwoOut=*/nullptr
> > +#endif
> > +#if CLANG_VERSION_MAJOR < 10
> > + , TargetMachine::CGFT_ObjectFile
> > #else
> > - NotAdded = TargetMachine->addPassesToEmitFile(PM, ostream, nullptr,
> > - TargetMachine::CGFT_ObjectFile);
> > + , llvm::CGFT_ObjectFile
> > #endif
> > + );
> > if (NotAdded) {
> > llvm::errs() << "TargetMachine can't emit a file of this type\n";
> > return std::unique_ptr<llvm::SmallVectorImpl<char>>(nullptr);
> > --
> > 2.33.0.882.g93a45727a2-goog
> >
Related, does it make sense to drop CLANG_VERSION_MAJOR<7 support?
On Mon, Oct 11, 2021 at 4:49 PM Fāng-ruì Sòng <[email protected]> wrote:
>
> On Mon, Oct 11, 2021 at 4:35 PM Ian Rogers <[email protected]> wrote:
> >
> > On Mon, Oct 11, 2021 at 4:24 PM Ian Rogers <[email protected]> wrote:
> > >
> > > The parameters to two functions and the location of a variable have
> > > changed in more recent LLVM/clang releases.
> > >
> > > Tested with LLVM 6, 8, 9, 10 and 11.
> > >
> > > Signed-off-by: Ian Rogers <[email protected]>
> > > ---
> > > tools/perf/util/c++/clang.cpp | 20 +++++++++++++-------
> > > 1 file changed, 13 insertions(+), 7 deletions(-)
> > >
> > > diff --git a/tools/perf/util/c++/clang.cpp b/tools/perf/util/c++/clang.cpp
> > > index c8885dfa3667..756200cb80b1 100644
> > > --- a/tools/perf/util/c++/clang.cpp
> > > +++ b/tools/perf/util/c++/clang.cpp
> > > @@ -44,7 +44,6 @@ createCompilerInvocation(llvm::opt::ArgStringList CFlags, StringRef& Path,
> > > "-triple", "bpf-pc-linux",
> > > "-fsyntax-only",
> > > "-ferror-limit", "19",
> > > - "-fmessage-length", "127",
> >
> > Sorry, missed from the commit message. I removed this flag to format
> > output down to 127 columns as with clang 11 I see in perf test:
> >
> > 58: builtin clang support :
> > 58.1: builtin clang compile C source to IR :
> > --- start ---
> > test child forked, pid 279307
> > error: unknown argument: '-fmessage-length'
> > 1 error generated.
> > test child finished with -1
> >
> > The flag isn't necessary for correct operation.
>
> Right, I changed the -cc1 option from Separate-form -fmessage-length
> to -fmessage-length= in 2020-03.
> -ferror-limit can be deleted as well.
Done in v2 (please consider adding Acked-by, Reviewed-by, etc).
> > Thanks,
> > Ian
> >
> > > "-O2",
> > > "-nostdsysteminc",
> > > "-nobuiltininc",
> > > @@ -55,7 +54,11 @@ createCompilerInvocation(llvm::opt::ArgStringList CFlags, StringRef& Path,
> > > "-x", "c"};
> > >
> > > CCArgs.append(CFlags.begin(), CFlags.end());
> > > - CompilerInvocation *CI = tooling::newInvocation(&Diags, CCArgs);
> > > + CompilerInvocation *CI = tooling::newInvocation(&Diags, CCArgs
> > > +#if CLANG_VERSION_MAJOR >= 11
> > > + ,/*BinaryName=*/nullptr
> > > +#endif
> > > + );
> > >
> > > FrontendOptions& Opts = CI->getFrontendOpts();
> > > Opts.Inputs.clear();
> > > @@ -151,13 +154,16 @@ getBPFObjectFromModule(llvm::Module *Module)
> > >
> > > legacy::PassManager PM;
> > > bool NotAdded;
> > > -#if CLANG_VERSION_MAJOR < 7
> > > - NotAdded = TargetMachine->addPassesToEmitFile(PM, ostream,
> > > - TargetMachine::CGFT_ObjectFile);
> > > + NotAdded = TargetMachine->addPassesToEmitFile(PM, ostream
> > > +#if CLANG_VERSION_MAJOR >= 7
> > > + , /*DwoOut=*/nullptr
> > > +#endif
> > > +#if CLANG_VERSION_MAJOR < 10
> > > + , TargetMachine::CGFT_ObjectFile
> > > #else
> > > - NotAdded = TargetMachine->addPassesToEmitFile(PM, ostream, nullptr,
> > > - TargetMachine::CGFT_ObjectFile);
> > > + , llvm::CGFT_ObjectFile
> > > #endif
> > > + );
> > > if (NotAdded) {
> > > llvm::errs() << "TargetMachine can't emit a file of this type\n";
> > > return std::unique_ptr<llvm::SmallVectorImpl<char>>(nullptr);
> > > --
> > > 2.33.0.882.g93a45727a2-goog
> > >
>
> Related, does it make sense to drop CLANG_VERSION_MAJOR<7 support?
Arnaldo can likely best comment. Clang 6.0.1 was released on July 5th
2018 so it may still be in his build tests.
Thanks!
Ian
Hi
We build perf with clang also recently, but unlucky that failed with
following errors:
```
In file included from /usr/lib/llvm-7/include/llvm/ADT/STLExtras.h:21,
from /usr/lib/llvm-7/include/llvm/ADT/StringRef.h:13,
from /usr/lib/llvm-7/include/clang/Basic/Version.h:20,
from test-clang.cpp:2:
/usr/lib/llvm-7/include/llvm/ADT/SmallVector.h: In instantiation of
'void llvm::SmallVectorTemplateBase<T, true>::push_back(const T&) [with
T = clang::driver::OffloadUnbundlingJobAction::DependentActionInfo]':
/usr/lib/llvm-7/include/clang/Driver/Action.h:579:61: required from here
/usr/lib/llvm-7/include/llvm/ADT/SmallVector.h:313:11: error: 'void*
memcpy(void*, const void*, size_t)' writing to an object of type 'struct
clang::driver::OffloadUnbundlingJobAction::DependentActionInfo' with no
trivial copy-assignment; use copy-initialization instead
[-Werror=class-memaccess]
memcpy(this->end(), &Elt, sizeof(T));
~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
In file included from /usr/lib/llvm-7/include/clang/Driver/Driver.h:15,
from test-clang.cpp:6:
/usr/lib/llvm-7/include/clang/Driver/Action.h:549:10: note: 'struct
clang::driver::OffloadUnbundlingJobAction::DependentActionInfo' declared
here
struct DependentActionInfo final {
^~~~~~~~~~~~~~~~~~~
cc1plus: all warnings being treated as errors
```
llvm version: 7
rootfs: Debian10
kernel: v5.8 v5.11 v5.15
reproduce:
$ cd linux/tools/perf
$ make LIBCLANGLLVM=1 ARCH= EXTRA_CFLAGS='-fno-omit-frame-pointer
-fsanitize=undefined -fsanitize=address'
Would you please kindly point out what's wrong with our steps? Or can
you give us your command to make perf with clang?
Thanks
Ma Xinjian
On Fri, Nov 12, 2021 at 2:34 AM Ma Xinjian <[email protected]> wrote:
>
> Hi
>
> We build perf with clang also recently, but unlucky that failed with
> following errors:
>
>
> ```
> In file included from /usr/lib/llvm-7/include/llvm/ADT/STLExtras.h:21,
> from /usr/lib/llvm-7/include/llvm/ADT/StringRef.h:13,
> from /usr/lib/llvm-7/include/clang/Basic/Version.h:20,
> from test-clang.cpp:2:
> /usr/lib/llvm-7/include/llvm/ADT/SmallVector.h: In instantiation of
> 'void llvm::SmallVectorTemplateBase<T, true>::push_back(const T&) [with
> T = clang::driver::OffloadUnbundlingJobAction::DependentActionInfo]':
> /usr/lib/llvm-7/include/clang/Driver/Action.h:579:61: required from here
> /usr/lib/llvm-7/include/llvm/ADT/SmallVector.h:313:11: error: 'void*
> memcpy(void*, const void*, size_t)' writing to an object of type 'struct
> clang::driver::OffloadUnbundlingJobAction::DependentActionInfo' with no
> trivial copy-assignment; use copy-initialization instead
> [-Werror=class-memaccess]
> memcpy(this->end(), &Elt, sizeof(T));
> ~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
> In file included from /usr/lib/llvm-7/include/clang/Driver/Driver.h:15,
> from test-clang.cpp:6:
> /usr/lib/llvm-7/include/clang/Driver/Action.h:549:10: note: 'struct
> clang::driver::OffloadUnbundlingJobAction::DependentActionInfo' declared
> here
> struct DependentActionInfo final {
> ^~~~~~~~~~~~~~~~~~~
> cc1plus: all warnings being treated as errors
> ```
>
> llvm version: 7
> rootfs: Debian10
> kernel: v5.8 v5.11 v5.15
> reproduce:
> $ cd linux/tools/perf
> $ make LIBCLANGLLVM=1 ARCH= EXTRA_CFLAGS='-fno-omit-frame-pointer
> -fsanitize=undefined -fsanitize=address'
>
> Would you please kindly point out what's wrong with our steps? Or can
> you give us your command to make perf with clang?
Hi Xinjian,
As the bug is in LLVM 7 there is little we can do in Linux perf to fix
the issue. I haven't got LLVM 7 on my machine to test with, but I see
the same problem with LLVM 6 - both of which are of course quite old.
My workaround is to add to the make command line
"CXXFLAGS=-Wno-error=class-memaccess". My full command line is:
make -C tools/perf O=/tmp/perf DESTDIR=/tmp/perf-install DEBUG=1
LIBPFM4=1 NO_LIBBFD=1 LIBCLANGLLVM=1
LLVM_CONFIG=/usr/lib/llvm-6.0/bin/llvm-config
CXXFLAGS=-Wno-error=class-memaccess
I know Intel is keen on testing. Related to this code are the BPF
tests in "perf test". I frequently see flakes on these tests that
count the number of times a system call is called. The flakes are an
under or over count by 1. The over count by 1 I can explain if during
the test another process happens to use the same system call. The
under counting is harder to explain and is possibly an indication of a
data race. I'd be happy for any suggestions to fix these flakes.
Thanks,
Ian
> Thanks
> Ma Xinjian
Em Fri, Nov 12, 2021 at 06:24:44PM +0800, Ma Xinjian escreveu:
> Hi
>
> We build perf with clang also recently, but unlucky that failed with
> following errors:
>
>
> ```
> In file included from /usr/lib/llvm-7/include/llvm/ADT/STLExtras.h:21,
> from /usr/lib/llvm-7/include/llvm/ADT/StringRef.h:13,
> from /usr/lib/llvm-7/include/clang/Basic/Version.h:20,
> from test-clang.cpp:2:
> /usr/lib/llvm-7/include/llvm/ADT/SmallVector.h: In instantiation of 'void
> llvm::SmallVectorTemplateBase<T, true>::push_back(const T&) [with T =
> clang::driver::OffloadUnbundlingJobAction::DependentActionInfo]':
> /usr/lib/llvm-7/include/clang/Driver/Action.h:579:61: required from here
> /usr/lib/llvm-7/include/llvm/ADT/SmallVector.h:313:11: error: 'void*
> memcpy(void*, const void*, size_t)' writing to an object of type 'struct
> clang::driver::OffloadUnbundlingJobAction::DependentActionInfo' with no
> trivial copy-assignment; use copy-initialization instead
> [-Werror=class-memaccess]
> memcpy(this->end(), &Elt, sizeof(T));
> ~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
> In file included from /usr/lib/llvm-7/include/clang/Driver/Driver.h:15,
> from test-clang.cpp:6:
> /usr/lib/llvm-7/include/clang/Driver/Action.h:549:10: note: 'struct
> clang::driver::OffloadUnbundlingJobAction::DependentActionInfo' declared
> here
> struct DependentActionInfo final {
> ^~~~~~~~~~~~~~~~~~~
> cc1plus: all warnings being treated as errors
> ```
>
> llvm version: 7
> rootfs: Debian10
> kernel: v5.8 v5.11 v5.15
> reproduce:
> $ cd linux/tools/perf
> $ make LIBCLANGLLVM=1 ARCH= EXTRA_CFLAGS='-fno-omit-frame-pointer
> -fsanitize=undefined -fsanitize=address'
>
> Would you please kindly point out what's wrong with our steps? Or can you
> give us your command to make perf with clang?
This is just for building it with clang embedded, is that strictly
required?
I.e. you can still use perf to build bpf by calling clang, etc.
Or are you trying to _build_ perf using clang?
To build perf with clang:
⬢[acme@toolbox perf]$ rm -rf /tmp/build/perf ; mkdir -p /tmp/build/perf ;
⬢[acme@toolbox perf]$ make -C tools/perf CC=clang O=/tmp/build/perf
End result:
⬢[acme@toolbox perf]$ perf -v
perf version 5.15.gf8b114cfd541
⬢[acme@toolbox perf]$ readelf -wi /tmp/build/perf/perf | grep -m5 DW_AT_producer
<c> DW_AT_producer : (indirect string, offset: 0x0): clang version 13.0.0 (https://github.com/llvm/llvm-project e8991caea8690ec2d17b0b7e1c29bf0da6609076)
<a6b> DW_AT_producer : (indirect string, offset: 0x0): clang version 13.0.0 (https://github.com/llvm/llvm-project e8991caea8690ec2d17b0b7e1c29bf0da6609076)
<76f0> DW_AT_producer : (indirect string, offset: 0x0): clang version 13.0.0 (https://github.com/llvm/llvm-project e8991caea8690ec2d17b0b7e1c29bf0da6609076)
<823d> DW_AT_producer : (indirect string, offset: 0x0): clang version 13.0.0 (https://github.com/llvm/llvm-project e8991caea8690ec2d17b0b7e1c29bf0da6609076)
<121a8> DW_AT_producer : (indirect string, offset: 0x0): clang version 13.0.0 (https://github.com/llvm/llvm-project e8991caea8690ec2d17b0b7e1c29bf0da6609076)
⬢[acme@toolbox perf]$
- Arnaldo