Em Tue, Mar 10, 2015 at 01:00:35PM +0100, Jiri Olsa escreveu:
> On Mon, Mar 09, 2015 at 08:28:45PM -0300, Arnaldo Carvalho de Melo wrote:
> > Em Mon, Mar 09, 2015 at 08:11:19PM -0300, Arnaldo Carvalho de Melo escreveu:
> > > Em Mon, Mar 09, 2015 at 06:51:21PM -0300, Arnaldo Carvalho de Melo
> > > escreveu:
> > [root@zoo ~]# find /opt/libbabeltrace/include/babeltrace/ -type f | xargs
> > grep bt_ctf_stream_class_get_packet_context_type
> > /opt/libbabeltrace/include/babeltrace/ctf-ir/stream-class.h:extern struct
> > bt_ctf_field_type *bt_ctf_stream_class_get_packet_context_type(
> > That seems to be included from the file included in the feature test code
> > :-\
> > Really ran out of time now...
> ouch, thanks a lot for debugging.. the reason is indeed the -Werror added by:
> b49f1a4be701 perf tools: Improve feature test debuggability
> following patch seems to fix this for me
> ---
> Following patch added -Werror for feature builds:
> b49f1a4be701 perf tools: Improve feature test debuggability
> and broke libbabeltrace feature build, because it was including
> wrong header and gcc couldn't find the used symbol definition.
> Adding proper header and keeping the old one as it is needed
> also (libbabeltrace quirk).
> +++ b/tools/perf/config/feature-checks/test-libbabeltrace.c
> #include <babeltrace/ctf-writer/writer.h>
> +#include <babeltrace/ctf-ir/stream-class.h>
Right, that was the fix I found as well, well, I was trying to include
_just_ babeltrace/ctf-ir/stream-class.h, but that is buggy in that it
doesn't include the header file with the uint32_t and int64_t types:
[acme@zoo linux]$ cat /tmp/build/perf/config/feature-checks/make-libbabeltrace
make[1]: Entering directory `/home/git/linux/tools/perf/config/feature-checks'
gcc -MD -I/opt/libbabeltrace//include -Wall -Werror -o
/tmp/build/perf/config/feature-checks/test-libbabeltrace.bin
test-libbabeltrace.c -Wl,-z,noexecstack -L/opt/libbabeltrace//lib
-lbabeltrace-ctf # -lbabeltrace provided by
In file included from test-libbabeltrace.c:2:0:
/opt/libbabeltrace//include/babeltrace/ctf-ir/stream-class.h:118:1: error:
unknown type name ‘int64_t’
extern int64_t bt_ctf_stream_class_get_id(
^
/opt/libbabeltrace//include/babeltrace/ctf-ir/stream-class.h:134:45: error:
unknown type name ‘uint32_t’
struct bt_ctf_stream_class *stream_class, uint32_t id);
^
make[1]: *** [test-libbabeltrace.bin] Error 1
make[1]: Leaving directory `/home/git/linux/tools/perf/config/feature-checks'
[acme@zoo linux]$
>
> int main(void)
> {
> --
> 1.9.3
Ah, I found the following patch useful in debugging this, if you're ok with it,
I'll put it in my tree with your Acked-by, ok?
- Arnaldo
[acme@zoo linux]$ git diff tools/perf/config/Makefile
diff --git a/tools/perf/config/Makefile b/tools/perf/config/Makefile
index e2350ada6ccd..4992c39652e6 100644
--- a/tools/perf/config/Makefile
+++ b/tools/perf/config/Makefile
@@ -184,7 +184,7 @@ endif
feature_check = $(eval $(feature_check_code))
define feature_check_code
- feature-$(1) := $(shell $(MAKE) OUTPUT=$(OUTPUT_FEATURES)
CFLAGS="$(EXTRA_CFLAGS) $(FEATURE_CHECK_CFLAGS-$(1))" LDFLAGS="$(LDFLAGS)
$(FEATURE_CHECK_LDFLAGS-$(1))" -C config/feature-checks test-$1.bin >/dev/null
2>/dev/null && echo 1 ||
+ feature-$(1) := $(shell $(MAKE) OUTPUT=$(OUTPUT_FEATURES)
CFLAGS="$(EXTRA_CFLAGS) $(FEATURE_CHECK_CFLAGS-$(1))" LDFLAGS="$(LDFLAGS)
$(FEATURE_CHECK_LDFLAGS-$(1))" -C config/feature-checks test-$1.bin >
$(OUTPUT_FEATURES)make-$(1) 2>&1
endef
feature_set = $(eval $(feature_set_code))
[acme@zoo linux]$
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