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[PATCH] perf build: Add LIBTRACEEVENT_DIR build option

Yang Jihong posted 1 patch 1 year, 9 months ago 
tools/perf/Makefile.config | 20 ++++++++++++++++----
1 file changed, 16 insertions(+), 4 deletions(-)
[PATCH] perf build: Add LIBTRACEEVENT_DIR build option
Posted by Yang Jihong 1 year, 9 months ago 
Currently, when libtraceevent is not linked,
perf does not support tracepoint:

  # ./perf record -e sched:sched_switch -a sleep 10
  event syntax error: 'sched:sched_switch'
                       \___ unsupported tracepoint

  libtraceevent is necessary for tracepoint support
  Run 'perf list' for a list of valid events

   Usage: perf record [<options>] [<command>]
      or: perf record [<options>] -- <command> [<options>]

      -e, --event <event>   event selector. use 'perf list' to list available events

For cross-compilation scenario, library may not be installed in the default
system path. Based on the above requirements, add LIBTRACEEVENT_DIR build
option to support specifying path of libtraceevent.

Example:

  1. Cross compile libtraceevent
  # cd /opt/libtraceevent
  # CROSS_COMPILE=aarch64-linux-gnu- make

  2. Cross compile perf
  # cd tool/perf
  # make VF=1 ARCH=arm64 CROSS_COMPILE=aarch64-linux-gnu- NO_LIBELF=1 LDFLAGS=--static LIBTRACEEVENT_DIR=/opt/libtraceevent
  <SNIP>
  Auto-detecting system features:
  <SNIP>
  ...                       LIBTRACEEVENT_DIR: /opt/libtraceevent

Signed-off-by: Yang Jihong <yangjihong@bytedance.com>
---
 tools/perf/Makefile.config | 20 ++++++++++++++++----
 1 file changed, 16 insertions(+), 4 deletions(-)

diff --git a/tools/perf/Makefile.config b/tools/perf/Makefile.config
index 1fe8df97fe88..7783479de691 100644
--- a/tools/perf/Makefile.config
+++ b/tools/perf/Makefile.config
@@ -182,6 +182,16 @@ endif
 FEATURE_CHECK_CFLAGS-libzstd := $(LIBZSTD_CFLAGS)
 FEATURE_CHECK_LDFLAGS-libzstd := $(LIBZSTD_LDFLAGS)
 
+# for linking with debug library, run like:
+# make DEBUG=1 LIBTRACEEVENT_DIR=/opt/libtraceevent/
+TRACEEVENTLIBS := -ltraceevent
+ifdef LIBTRACEEVENT_DIR
+  LIBTRACEEVENT_CFLAGS  := -I$(LIBTRACEEVENT_DIR)/include
+  LIBTRACEEVENT_LDFLAGS := -L$(LIBTRACEEVENT_DIR)/lib
+endif
+FEATURE_CHECK_CFLAGS-libtraceevent := $(LIBTRACEEVENT_CFLAGS)
+FEATURE_CHECK_LDFLAGS-libtraceevent := $(LIBTRACEEVENT_LDFLAGS) $(TRACEEVENTLIBS)
+
 FEATURE_CHECK_CFLAGS-bpf = -I. -I$(srctree)/tools/include -I$(srctree)/tools/arch/$(SRCARCH)/include/uapi -I$(srctree)/tools/include/uapi
 # include ARCH specific config
 -include $(src-perf)/arch/$(SRCARCH)/Makefile
@@ -1165,9 +1175,10 @@ endif
 ifneq ($(NO_LIBTRACEEVENT),1)
   $(call feature_check,libtraceevent)
   ifeq ($(feature-libtraceevent), 1)
-    CFLAGS += -DHAVE_LIBTRACEEVENT
-    EXTLIBS += -ltraceevent
-    LIBTRACEEVENT_VERSION := $(shell $(PKG_CONFIG) --modversion libtraceevent)
+    CFLAGS += -DHAVE_LIBTRACEEVENT $(LIBTRACEEVENT_CFLAGS)
+    LDFLAGS += $(LIBTRACEEVENT_LDFLAGS)
+    EXTLIBS += ${TRACEEVENTLIBS}
+    LIBTRACEEVENT_VERSION := $(shell PKG_CONFIG_PATH=$(LIBTRACEEVENT_DIR) $(PKG_CONFIG) --modversion libtraceevent)
     LIBTRACEEVENT_VERSION_1 := $(word 1, $(subst ., ,$(LIBTRACEEVENT_VERSION)))
     LIBTRACEEVENT_VERSION_2 := $(word 2, $(subst ., ,$(LIBTRACEEVENT_VERSION)))
     LIBTRACEEVENT_VERSION_3 := $(word 3, $(subst ., ,$(LIBTRACEEVENT_VERSION)))
@@ -1175,7 +1186,7 @@ ifneq ($(NO_LIBTRACEEVENT),1)
     CFLAGS += -DLIBTRACEEVENT_VERSION=$(LIBTRACEEVENT_VERSION_CPP)
     $(call detected,CONFIG_LIBTRACEEVENT)
   else
-    $(error ERROR: libtraceevent is missing. Please install libtraceevent-dev/libtraceevent-devel or build with NO_LIBTRACEEVENT=1)
+    $(error ERROR: libtraceevent is missing. Please install libtraceevent-dev/libtraceevent-devel and/or set LIBTRACEEVENT_DIR or build with NO_LIBTRACEEVENT=1)
   endif
 
   $(call feature_check,libtracefs)
@@ -1301,6 +1312,7 @@ ifeq ($(VF),1)
   $(call print_var,LIBUNWIND_DIR)
   $(call print_var,LIBDW_DIR)
   $(call print_var,JDIR)
+  $(call print_var,LIBTRACEEVENT_DIR)
 
   ifeq ($(dwarf-post-unwind),1)
     $(call feature_print_text,"DWARF post unwind library", $(dwarf-post-unwind-text)) $(info $(MSG))
-- 
2.25.1
Re: [PATCH] perf build: Add LIBTRACEEVENT_DIR build option
Posted by Ian Rogers 1 year, 9 months ago 
On Wed, Mar 13, 2024 at 11:30 PM Yang Jihong <yangjihong@bytedance.com> wrote:
>
> Currently, when libtraceevent is not linked,
> perf does not support tracepoint:
>
>   # ./perf record -e sched:sched_switch -a sleep 10
>   event syntax error: 'sched:sched_switch'
>                        \___ unsupported tracepoint
>
>   libtraceevent is necessary for tracepoint support
>   Run 'perf list' for a list of valid events
>
>    Usage: perf record [<options>] [<command>]
>       or: perf record [<options>] -- <command> [<options>]
>
>       -e, --event <event>   event selector. use 'perf list' to list available events
>
> For cross-compilation scenario, library may not be installed in the default
> system path. Based on the above requirements, add LIBTRACEEVENT_DIR build
> option to support specifying path of libtraceevent.
>
> Example:
>
>   1. Cross compile libtraceevent
>   # cd /opt/libtraceevent
>   # CROSS_COMPILE=aarch64-linux-gnu- make
>
>   2. Cross compile perf
>   # cd tool/perf
>   # make VF=1 ARCH=arm64 CROSS_COMPILE=aarch64-linux-gnu- NO_LIBELF=1 LDFLAGS=--static LIBTRACEEVENT_DIR=/opt/libtraceevent
>   <SNIP>
>   Auto-detecting system features:
>   <SNIP>
>   ...                       LIBTRACEEVENT_DIR: /opt/libtraceevent
>
> Signed-off-by: Yang Jihong <yangjihong@bytedance.com>

This all looks good to me, thanks!

Reviewed-by: Ian Rogers <irogers@google.com>

> ---
>  tools/perf/Makefile.config | 20 ++++++++++++++++----
>  1 file changed, 16 insertions(+), 4 deletions(-)
>
> diff --git a/tools/perf/Makefile.config b/tools/perf/Makefile.config
> index 1fe8df97fe88..7783479de691 100644
> --- a/tools/perf/Makefile.config
> +++ b/tools/perf/Makefile.config
> @@ -182,6 +182,16 @@ endif
>  FEATURE_CHECK_CFLAGS-libzstd := $(LIBZSTD_CFLAGS)
>  FEATURE_CHECK_LDFLAGS-libzstd := $(LIBZSTD_LDFLAGS)
>
> +# for linking with debug library, run like:
> +# make DEBUG=1 LIBTRACEEVENT_DIR=/opt/libtraceevent/
> +TRACEEVENTLIBS := -ltraceevent
> +ifdef LIBTRACEEVENT_DIR
> +  LIBTRACEEVENT_CFLAGS  := -I$(LIBTRACEEVENT_DIR)/include
> +  LIBTRACEEVENT_LDFLAGS := -L$(LIBTRACEEVENT_DIR)/lib
> +endif
> +FEATURE_CHECK_CFLAGS-libtraceevent := $(LIBTRACEEVENT_CFLAGS)
> +FEATURE_CHECK_LDFLAGS-libtraceevent := $(LIBTRACEEVENT_LDFLAGS) $(TRACEEVENTLIBS)
> +
>  FEATURE_CHECK_CFLAGS-bpf = -I. -I$(srctree)/tools/include -I$(srctree)/tools/arch/$(SRCARCH)/include/uapi -I$(srctree)/tools/include/uapi
>  # include ARCH specific config
>  -include $(src-perf)/arch/$(SRCARCH)/Makefile
> @@ -1165,9 +1175,10 @@ endif
>  ifneq ($(NO_LIBTRACEEVENT),1)
>    $(call feature_check,libtraceevent)
>    ifeq ($(feature-libtraceevent), 1)
> -    CFLAGS += -DHAVE_LIBTRACEEVENT
> -    EXTLIBS += -ltraceevent
> -    LIBTRACEEVENT_VERSION := $(shell $(PKG_CONFIG) --modversion libtraceevent)
> +    CFLAGS += -DHAVE_LIBTRACEEVENT $(LIBTRACEEVENT_CFLAGS)
> +    LDFLAGS += $(LIBTRACEEVENT_LDFLAGS)
> +    EXTLIBS += ${TRACEEVENTLIBS}
> +    LIBTRACEEVENT_VERSION := $(shell PKG_CONFIG_PATH=$(LIBTRACEEVENT_DIR) $(PKG_CONFIG) --modversion libtraceevent)
>      LIBTRACEEVENT_VERSION_1 := $(word 1, $(subst ., ,$(LIBTRACEEVENT_VERSION)))
>      LIBTRACEEVENT_VERSION_2 := $(word 2, $(subst ., ,$(LIBTRACEEVENT_VERSION)))
>      LIBTRACEEVENT_VERSION_3 := $(word 3, $(subst ., ,$(LIBTRACEEVENT_VERSION)))
> @@ -1175,7 +1186,7 @@ ifneq ($(NO_LIBTRACEEVENT),1)
>      CFLAGS += -DLIBTRACEEVENT_VERSION=$(LIBTRACEEVENT_VERSION_CPP)
>      $(call detected,CONFIG_LIBTRACEEVENT)
>    else
> -    $(error ERROR: libtraceevent is missing. Please install libtraceevent-dev/libtraceevent-devel or build with NO_LIBTRACEEVENT=1)
> +    $(error ERROR: libtraceevent is missing. Please install libtraceevent-dev/libtraceevent-devel and/or set LIBTRACEEVENT_DIR or build with NO_LIBTRACEEVENT=1)
>    endif
>
>    $(call feature_check,libtracefs)
> @@ -1301,6 +1312,7 @@ ifeq ($(VF),1)
>    $(call print_var,LIBUNWIND_DIR)
>    $(call print_var,LIBDW_DIR)
>    $(call print_var,JDIR)
> +  $(call print_var,LIBTRACEEVENT_DIR)
>
>    ifeq ($(dwarf-post-unwind),1)
>      $(call feature_print_text,"DWARF post unwind library", $(dwarf-post-unwind-text)) $(info $(MSG))
> --
> 2.25.1
>
Re: [PATCH] perf build: Add LIBTRACEEVENT_DIR build option
Posted by Ian Rogers 1 year, 7 months ago 
On Sat, Mar 23, 2024 at 12:07 PM Ian Rogers <irogers@google.com> wrote:
>
> On Wed, Mar 13, 2024 at 11:30 PM Yang Jihong <yangjihong@bytedance.com> wrote:
> >
> > Currently, when libtraceevent is not linked,
> > perf does not support tracepoint:
> >
> >   # ./perf record -e sched:sched_switch -a sleep 10
> >   event syntax error: 'sched:sched_switch'
> >                        \___ unsupported tracepoint
> >
> >   libtraceevent is necessary for tracepoint support
> >   Run 'perf list' for a list of valid events
> >
> >    Usage: perf record [<options>] [<command>]
> >       or: perf record [<options>] -- <command> [<options>]
> >
> >       -e, --event <event>   event selector. use 'perf list' to list available events
> >
> > For cross-compilation scenario, library may not be installed in the default
> > system path. Based on the above requirements, add LIBTRACEEVENT_DIR build
> > option to support specifying path of libtraceevent.
> >
> > Example:
> >
> >   1. Cross compile libtraceevent
> >   # cd /opt/libtraceevent
> >   # CROSS_COMPILE=aarch64-linux-gnu- make
> >
> >   2. Cross compile perf
> >   # cd tool/perf
> >   # make VF=1 ARCH=arm64 CROSS_COMPILE=aarch64-linux-gnu- NO_LIBELF=1 LDFLAGS=--static LIBTRACEEVENT_DIR=/opt/libtraceevent
> >   <SNIP>
> >   Auto-detecting system features:
> >   <SNIP>
> >   ...                       LIBTRACEEVENT_DIR: /opt/libtraceevent
> >
> > Signed-off-by: Yang Jihong <yangjihong@bytedance.com>
>
> This all looks good to me, thanks!
>
> Reviewed-by: Ian Rogers <irogers@google.com>
>
> > ---
> >  tools/perf/Makefile.config | 20 ++++++++++++++++----
> >  1 file changed, 16 insertions(+), 4 deletions(-)
> >
> > diff --git a/tools/perf/Makefile.config b/tools/perf/Makefile.config
> > index 1fe8df97fe88..7783479de691 100644
> > --- a/tools/perf/Makefile.config
> > +++ b/tools/perf/Makefile.config
> > @@ -182,6 +182,16 @@ endif
> >  FEATURE_CHECK_CFLAGS-libzstd := $(LIBZSTD_CFLAGS)
> >  FEATURE_CHECK_LDFLAGS-libzstd := $(LIBZSTD_LDFLAGS)
> >
> > +# for linking with debug library, run like:
> > +# make DEBUG=1 LIBTRACEEVENT_DIR=/opt/libtraceevent/
> > +TRACEEVENTLIBS := -ltraceevent
> > +ifdef LIBTRACEEVENT_DIR
> > +  LIBTRACEEVENT_CFLAGS  := -I$(LIBTRACEEVENT_DIR)/include
> > +  LIBTRACEEVENT_LDFLAGS := -L$(LIBTRACEEVENT_DIR)/lib
> > +endif

I'm finding to test a libtraceevent asan build on a system that has
libtraceevent installed, I need to carry this change:
```
diff --git a/tools/perf/Makefile.config b/tools/perf/Makefile.config
index 7f1e016a9253..b356520d8291 100644
--- a/tools/perf/Makefile.config
+++ b/tools/perf/Makefile.config
@@ -187,7 +187,7 @@ FEATURE_CHECK_LDFLAGS-libzstd := $(LIBZSTD_LDFLAGS)
TRACEEVENTLIBS := -ltraceevent
ifdef LIBTRACEEVENT_DIR
  LIBTRACEEVENT_CFLAGS  := -I$(LIBTRACEEVENT_DIR)/include
-  LIBTRACEEVENT_LDFLAGS := -L$(LIBTRACEEVENT_DIR)/lib
+  LIBTRACEEVENT_LDFLAGS := -Wl,-rpath,$(LIBTRACEEVENT_DIR)/lib64
endif
FEATURE_CHECK_CFLAGS-libtraceevent := $(LIBTRACEEVENT_CFLAGS)
FEATURE_CHECK_LDFLAGS-libtraceevent := $(LIBTRACEEVENT_LDFLAGS)
$(TRACEEVENTLIBS)
```

I'm not sure how to make this something that'll work well with cross
compilation, etc.

Thanks,
Ian

> > +FEATURE_CHECK_CFLAGS-libtraceevent := $(LIBTRACEEVENT_CFLAGS)
> > +FEATURE_CHECK_LDFLAGS-libtraceevent := $(LIBTRACEEVENT_LDFLAGS) $(TRACEEVENTLIBS)
> > +
> >  FEATURE_CHECK_CFLAGS-bpf = -I. -I$(srctree)/tools/include -I$(srctree)/tools/arch/$(SRCARCH)/include/uapi -I$(srctree)/tools/include/uapi
> >  # include ARCH specific config
> >  -include $(src-perf)/arch/$(SRCARCH)/Makefile
> > @@ -1165,9 +1175,10 @@ endif
> >  ifneq ($(NO_LIBTRACEEVENT),1)
> >    $(call feature_check,libtraceevent)
> >    ifeq ($(feature-libtraceevent), 1)
> > -    CFLAGS += -DHAVE_LIBTRACEEVENT
> > -    EXTLIBS += -ltraceevent
> > -    LIBTRACEEVENT_VERSION := $(shell $(PKG_CONFIG) --modversion libtraceevent)
> > +    CFLAGS += -DHAVE_LIBTRACEEVENT $(LIBTRACEEVENT_CFLAGS)
> > +    LDFLAGS += $(LIBTRACEEVENT_LDFLAGS)
> > +    EXTLIBS += ${TRACEEVENTLIBS}
> > +    LIBTRACEEVENT_VERSION := $(shell PKG_CONFIG_PATH=$(LIBTRACEEVENT_DIR) $(PKG_CONFIG) --modversion libtraceevent)
> >      LIBTRACEEVENT_VERSION_1 := $(word 1, $(subst ., ,$(LIBTRACEEVENT_VERSION)))
> >      LIBTRACEEVENT_VERSION_2 := $(word 2, $(subst ., ,$(LIBTRACEEVENT_VERSION)))
> >      LIBTRACEEVENT_VERSION_3 := $(word 3, $(subst ., ,$(LIBTRACEEVENT_VERSION)))
> > @@ -1175,7 +1186,7 @@ ifneq ($(NO_LIBTRACEEVENT),1)
> >      CFLAGS += -DLIBTRACEEVENT_VERSION=$(LIBTRACEEVENT_VERSION_CPP)
> >      $(call detected,CONFIG_LIBTRACEEVENT)
> >    else
> > -    $(error ERROR: libtraceevent is missing. Please install libtraceevent-dev/libtraceevent-devel or build with NO_LIBTRACEEVENT=1)
> > +    $(error ERROR: libtraceevent is missing. Please install libtraceevent-dev/libtraceevent-devel and/or set LIBTRACEEVENT_DIR or build with NO_LIBTRACEEVENT=1)
> >    endif
> >
> >    $(call feature_check,libtracefs)
> > @@ -1301,6 +1312,7 @@ ifeq ($(VF),1)
> >    $(call print_var,LIBUNWIND_DIR)
> >    $(call print_var,LIBDW_DIR)
> >    $(call print_var,JDIR)
> > +  $(call print_var,LIBTRACEEVENT_DIR)
> >
> >    ifeq ($(dwarf-post-unwind),1)
> >      $(call feature_print_text,"DWARF post unwind library", $(dwarf-post-unwind-text)) $(info $(MSG))
> > --
> > 2.25.1
> >
Re: [External] Re: [PATCH] perf build: Add LIBTRACEEVENT_DIR build option
Posted by Yang Jihong 1 year, 7 months ago 
Hello,

On 5/1/24 01:46, Ian Rogers wrote:
> On Sat, Mar 23, 2024 at 12:07 PM Ian Rogers <irogers@google.com> wrote:
>>
>> On Wed, Mar 13, 2024 at 11:30 PM Yang Jihong <yangjihong@bytedance.com> wrote:
>>>
>>> Currently, when libtraceevent is not linked,
>>> perf does not support tracepoint:
>>>
>>>    # ./perf record -e sched:sched_switch -a sleep 10
>>>    event syntax error: 'sched:sched_switch'
>>>                         \___ unsupported tracepoint
>>>
>>>    libtraceevent is necessary for tracepoint support
>>>    Run 'perf list' for a list of valid events
>>>
>>>     Usage: perf record [<options>] [<command>]
>>>        or: perf record [<options>] -- <command> [<options>]
>>>
>>>        -e, --event <event>   event selector. use 'perf list' to list available events
>>>
>>> For cross-compilation scenario, library may not be installed in the default
>>> system path. Based on the above requirements, add LIBTRACEEVENT_DIR build
>>> option to support specifying path of libtraceevent.
>>>
>>> Example:
>>>
>>>    1. Cross compile libtraceevent
>>>    # cd /opt/libtraceevent
>>>    # CROSS_COMPILE=aarch64-linux-gnu- make
>>>
>>>    2. Cross compile perf
>>>    # cd tool/perf
>>>    # make VF=1 ARCH=arm64 CROSS_COMPILE=aarch64-linux-gnu- NO_LIBELF=1 LDFLAGS=--static LIBTRACEEVENT_DIR=/opt/libtraceevent
>>>    <SNIP>
>>>    Auto-detecting system features:
>>>    <SNIP>
>>>    ...                       LIBTRACEEVENT_DIR: /opt/libtraceevent
>>>
>>> Signed-off-by: Yang Jihong <yangjihong@bytedance.com>
>>
>> This all looks good to me, thanks!
>>
>> Reviewed-by: Ian Rogers <irogers@google.com>
>>
>>> ---
>>>   tools/perf/Makefile.config | 20 ++++++++++++++++----
>>>   1 file changed, 16 insertions(+), 4 deletions(-)
>>>
>>> diff --git a/tools/perf/Makefile.config b/tools/perf/Makefile.config
>>> index 1fe8df97fe88..7783479de691 100644
>>> --- a/tools/perf/Makefile.config
>>> +++ b/tools/perf/Makefile.config
>>> @@ -182,6 +182,16 @@ endif
>>>   FEATURE_CHECK_CFLAGS-libzstd := $(LIBZSTD_CFLAGS)
>>>   FEATURE_CHECK_LDFLAGS-libzstd := $(LIBZSTD_LDFLAGS)
>>>
>>> +# for linking with debug library, run like:
>>> +# make DEBUG=1 LIBTRACEEVENT_DIR=/opt/libtraceevent/
>>> +TRACEEVENTLIBS := -ltraceevent
>>> +ifdef LIBTRACEEVENT_DIR
>>> +  LIBTRACEEVENT_CFLAGS  := -I$(LIBTRACEEVENT_DIR)/include
>>> +  LIBTRACEEVENT_LDFLAGS := -L$(LIBTRACEEVENT_DIR)/lib
>>> +endif
> 
> I'm finding to test a libtraceevent asan build on a system that has
> libtraceevent installed, I need to carry this change:
> ```
> diff --git a/tools/perf/Makefile.config b/tools/perf/Makefile.config
> index 7f1e016a9253..b356520d8291 100644
> --- a/tools/perf/Makefile.config
> +++ b/tools/perf/Makefile.config
> @@ -187,7 +187,7 @@ FEATURE_CHECK_LDFLAGS-libzstd := $(LIBZSTD_LDFLAGS)
> TRACEEVENTLIBS := -ltraceevent
> ifdef LIBTRACEEVENT_DIR
>    LIBTRACEEVENT_CFLAGS  := -I$(LIBTRACEEVENT_DIR)/include
> -  LIBTRACEEVENT_LDFLAGS := -L$(LIBTRACEEVENT_DIR)/lib
> +  LIBTRACEEVENT_LDFLAGS := -Wl,-rpath,$(LIBTRACEEVENT_DIR)/lib64
> endif
> FEATURE_CHECK_CFLAGS-libtraceevent := $(LIBTRACEEVENT_CFLAGS)
> FEATURE_CHECK_LDFLAGS-libtraceevent := $(LIBTRACEEVENT_LDFLAGS)
> $(TRACEEVENTLIBS)
> ```
> 
> I'm not sure how to make this something that'll work well with cross
> compilation, etc.

Because of the holiday, the reply is a bit late.

It seems that perf built by asan/msan will not search for shared 
libraries in the -L directory.
We generally use cross-compile perf to analyze performance problems. In 
most cases, it is static compilation (rpath does not work), and it will 
not enable sanitizers.
so can we simply check if EXTRA_CFLAGS contains 
-fsanitize=address/memory, and add libtraceevent dir to rpath?

I submitted a patch, please see if the solution is feasible:
https://lore.kernel.org/all/20240506081648.3890067-1-yangjihong@bytedance.com/


Or we can add libtraceevent's ld.so.conf to the environment. This 
requires manual configuration of the build environment, which is 
inconvenient.

# echo "/opt/libtraceevent/lib" > /etc/ld.so.conf.d/libtracevent.conf
# ldconfig

Thanks,
Yang

Patchew 2.1-devel-b67e4c2

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