linux-kernel - [PATCHv3 01/10] tools lib traceevent: Use LDFLAGS in the build commands

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Date:   Wed, 12 Dec 2018 10:12:14 +0100
From:   Jiri Olsa <jolsa@...hat.com>
To:     Arnaldo Carvalho de Melo <acme@...nel.org>
Cc:     Steven Rostedt <rostedt@...dmis.org>, Jiri Olsa <jolsa@...nel.org>,
        lkml <linux-kernel@...r.kernel.org>,
        Tzvetomir Stoyanov <tz.stoyanov@...il.com>,
        "Herton R. Krzesinski" <herton@...hat.com>
Subject: [PATCHv3 01/10] tools lib traceevent: Use LDFLAGS in the build
 commands

On Wed, Nov 28, 2018 at 10:56:41AM -0300, Arnaldo Carvalho de Melo wrote:

SNIP

>     LD       /tmp/build/perf/libtraceevent-in.o
>   MKDIR    /tmp/build/perf/util/
>   LINK     /tmp/build/perf/libtraceevent.a
>   CC       /tmp/build/perf/util/block-range.o
>   MKDIR    /tmp/build/perf/arch/
>   CC       /tmp/build/perf/arch/common.o
>   LD       /tmp/build/perf/plugin_mac80211-in.o
>   CC       /tmp/build/perf/plugin_sched_switch.o
>   LD       /tmp/build/perf/plugin_sched_switch-in.o
>   CC       /tmp/build/perf/plugin_function.o
>   LD       /tmp/build/perf/plugin_function-in.o
>   CC       /tmp/build/perf/plugin_xen.o
>   MKDIR    /tmp/build/perf/arch/arm/util/
>   CC       /tmp/build/perf/arch/arm/util/pmu.o
>   LD       /tmp/build/perf/plugin_xen-in.o
>   CC       /tmp/build/perf/plugin_scsi.o
>   CC       /tmp/build/perf/plugin_cfg80211.o
>   LD       /tmp/build/perf/plugin_scsi-in.o
>   LD       /tmp/build/perf/plugin_cfg80211-in.o
>   MKDIR    /tmp/build/perf/arch/arm/util/
>   CC       /tmp/build/perf/arch/arm/util/auxtrace.o
>   CC       /tmp/build/perf/arch/arm/util/cs-etm.o
>   LINK     /tmp/build/perf/plugin_jbd2.so
> /opt/android-ndk-r12b/toolchains/arm-linux-androideabi-4.9/prebuilt/linux-x86_64/bin/../lib/gcc/arm-linux-androideabi/4.9.x/../../../../arm-linux-androideabi/bin/ld: error: cannot find -lc
> /opt/android-ndk-r12b/toolchains/arm-linux-androideabi-4.9/prebuilt/linux-x86_64/bin/../lib/gcc/arm-linux-androideabi/4.9.x/../../../../arm-linux-androideabi/bin/ld: error: cannot find -ldl
> collect2: error: ld returned 1 exit status
> Makefile:196: recipe for target '/tmp/build/perf/plugin_jbd2.so' failed
> make[3]: *** [/tmp/build/perf/plugin_jbd2.so] Error 1
> Makefile.perf:669: recipe for target 'libtraceevent_plugins' failed
> make[2]: *** [libtraceevent_plugins] Error 2
> make[2]: *** Waiting for unfinished jobs....
> 
> 

SNIP

>    1    59.08 alpine:3.4                    : Ok   gcc (Alpine 5.3.0) 5.3.0
>    2    68.75 alpine:3.5                    : Ok   gcc (Alpine 6.2.1) 6.2.1 20160822
>    3    79.67 alpine:3.6                    : Ok   gcc (Alpine 6.3.0) 6.3.0
>    4    48.69 alpine:3.7                    : Ok   gcc (Alpine 6.4.0) 6.4.0
>    5    46.89 alpine:3.8                    : Ok   gcc (Alpine 6.4.0) 6.4.0
>    6    46.46 alpine:edge                   : Ok   gcc (Alpine 6.4.0) 6.4.0
>    7    38.46 amazonlinux:1                 : Ok   gcc (GCC) 4.8.5 20150623 (Red Hat 4.8.5-28)
>    8    44.69 amazonlinux:2                 : Ok   gcc (GCC) 7.3.1 20180303 (Red Hat 7.3.1-5)
>    9    41.88 android-ndk:r12b-arm          : Ok   arm-linux-androideabi-gcc (GCC) 4.9.x 20150123 (prerelease)
>   10    46.24 android-ndk:r15c-arm          : Ok   arm-linux-androideabi-gcc (GCC) 4.9.x 20150123 (prerelease)
>   11    22.22 centos:5                      : Ok   gcc (GCC) 4.1.2 20080704 (Red Hat 4.1.2-55)
>   12    35.54 centos:6                      : Ok   gcc (GCC) 4.4.7 20120313 (Red Hat 4.4.7-23)

ok, I shouldn't have taken out the CFLAGS,
some build scripts depends on it already

attaching v2

thanks,
jirka


---
So user could specify outside LDFLAGS values.

Keeping the CFLAGS in there as well, so we don't break
existing script.

Cc: Tzvetomir Stoyanov (VMware) <tz.stoyanov@...il.com>
Cc: Steven Rostedt <rostedt@...dmis.org>
Acked-by: Steven Rostedt (VMware) <rostedt@...dmis.org>
Signed-off-by: Jiri Olsa <jolsa@...nel.org>
---
 tools/lib/traceevent/Makefile | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/tools/lib/traceevent/Makefile b/tools/lib/traceevent/Makefile
index 67fe5d7ef190..941761d9923d 100644
--- a/tools/lib/traceevent/Makefile
+++ b/tools/lib/traceevent/Makefile
@@ -177,7 +177,7 @@ $(TE_IN): force
 	$(Q)$(MAKE) $(build)=libtraceevent
 
 $(OUTPUT)libtraceevent.so.$(EVENT_PARSE_VERSION): $(TE_IN)
-	$(QUIET_LINK)$(CC) --shared $^ -Wl,-soname,libtraceevent.so.$(EP_VERSION) -o $@
+	$(QUIET_LINK)$(CC) --shared $(LDFLAGS) $^ -Wl,-soname,libtraceevent.so.$(EP_VERSION) -o $@
 	@ln -sf $(@F) $(OUTPUT)libtraceevent.so
 	@ln -sf $(@F) $(OUTPUT)libtraceevent.so.$(EP_VERSION)
 
@@ -196,7 +196,7 @@ $(PLUGINS_IN): force
 	$(Q)$(MAKE) $(build)=$(plugin_obj)
 
 $(OUTPUT)%.so: $(OUTPUT)%-in.o
-	$(QUIET_LINK)$(CC) $(CFLAGS) -shared -nostartfiles -o $@ $^
+	$(QUIET_LINK)$(CC) $(CFLAGS) -shared $(LDFLAGS) -nostartfiles -o $@ $^
 
 define make_version.h
   (echo '/* This file is automatically generated. Do not modify. */';		\
-- 
2.17.2