linux-kernel - Re: [PATCH 2/8] perf tools: update Makefile for Android

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Date:	Mon, 8 Oct 2012 13:43:33 -0700
From:	Arnaldo Carvalho de Melo <acme@...stprotocols.net>
To:	Irina Tirdea <irina.tirdea@...il.com>
Cc:	Ingo Molnar <mingo@...nel.org>,
	Steven Rostedt <rostedt@...dmis.org>,
	Peter Zijlstra <a.p.zijlstra@...llo.nl>,
	LKML <linux-kernel@...r.kernel.org>,
	Paul Mackerras <paulus@...ba.org>,
	David Ahern <dsahern@...il.com>,
	Namhyung Kim <namhyung@...nel.org>,
	Pekka Enberg <penberg@...nel.org>,
	Jiri Olsa <jolsa@...hat.com>,
	Irina Tirdea <irina.tirdea@...el.com>,
	Bernhard Rosenkraenzer <Bernhard.Rosenkranzer@...aro.org>
Subject: Re: [PATCH 2/8] perf tools: update Makefile for Android

Em Mon, Oct 08, 2012 at 09:43:27AM +0300, Irina Tirdea escreveu:
> From: Irina Tirdea <irina.tirdea@...el.com>
> 
> For cross-compiling on Android, some specific changes are needed in
> the Makefile.
> 
> Update the Makefile to support cross-compiling for Android.
> The original ideea for this was send by Bernhard Rosenkraenzer in
> https://lkml.org/lkml/2012/8/23/316, but this is a rewrite.

If this is a rewrite, I'm dropping Bernhard's SOB, leaving just him in
the CC list.

- Arnaldo

> 
> Changes:
> () support bionic in addition to glibc
> () remove rt and pthread libraries that do not exist in Android
> () use $(CFLAGS) when detecting initial compiler flags. This is needed
> when setting CFLAGS as an argument of make (e.g. for setting --sysroot).
> () include perf's local directory when building for Android to be able to find
> relative paths if using --sysroot (e.g.: ../../include/linux/perf_event.h)
> 
> Signed-off-by: Bernhard Rosenkraenzer <Bernhard.Rosenkranzer@...aro.org>
> Signed-off-by: Irina Tirdea <irina.tirdea@...el.com>
> ---
>  tools/perf/Makefile                 |   25 +++++++++++++++++++------
>  tools/perf/config/feature-tests.mak |    9 +++++++++
>  2 files changed, 28 insertions(+), 6 deletions(-)
> 
> diff --git a/tools/perf/Makefile b/tools/perf/Makefile
> index 0e468b5..1a23118 100644
> --- a/tools/perf/Makefile
> +++ b/tools/perf/Makefile
> @@ -155,15 +155,15 @@ SPARSE_FLAGS = -D__BIG_ENDIAN__ -D__powerpc__
>  
>  -include config/feature-tests.mak
>  
> -ifeq ($(call try-cc,$(SOURCE_HELLO),-Werror -fstack-protector-all),y)
> +ifeq ($(call try-cc,$(SOURCE_HELLO),$(CFLAGS) -Werror -fstack-protector-all),y)
>  	CFLAGS := $(CFLAGS) -fstack-protector-all
>  endif
>  
> -ifeq ($(call try-cc,$(SOURCE_HELLO),-Werror -Wstack-protector),y)
> +ifeq ($(call try-cc,$(SOURCE_HELLO),$(CFLAGS) -Werror -Wstack-protector),y)
>         CFLAGS := $(CFLAGS) -Wstack-protector
>  endif
>  
> -ifeq ($(call try-cc,$(SOURCE_HELLO),-Werror -Wvolatile-register-var),y)
> +ifeq ($(call try-cc,$(SOURCE_HELLO),$(CFLAGS) -Werror -Wvolatile-register-var),y)
>         CFLAGS := $(CFLAGS) -Wvolatile-register-var
>  endif
>  
> @@ -172,6 +172,13 @@ endif
>  BASIC_CFLAGS = -Iutil/include -Iarch/$(ARCH)/include -I$(OUTPUT)util -I$(TRACE_EVENT_DIR) -D_LARGEFILE64_SOURCE -D_FILE_OFFSET_BITS=64 -D_GNU_SOURCE
>  BASIC_LDFLAGS =
>  
> +ifeq ($(call try-cc,$(SOURCE_BIONIC),$(CFLAGS)),y)
> +	BIONIC := 1
> +	EXTLIBS := $(filter-out -lrt,$(EXTLIBS))
> +	EXTLIBS := $(filter-out -lpthread,$(EXTLIBS))
> +	BASIC_CFLAGS += -I.
> +endif
> +
>  # Guard against environment variables
>  BUILTIN_OBJS =
>  LIB_H =
> @@ -467,12 +474,18 @@ else
>  FLAGS_LIBELF=$(ALL_CFLAGS) $(ALL_LDFLAGS) $(EXTLIBS)
>  ifneq ($(call try-cc,$(SOURCE_LIBELF),$(FLAGS_LIBELF)),y)
>  	FLAGS_GLIBC=$(ALL_CFLAGS) $(ALL_LDFLAGS)
> -	ifneq ($(call try-cc,$(SOURCE_GLIBC),$(FLAGS_GLIBC)),y)
> -		msg := $(error No gnu/libc-version.h found, please install glibc-dev[el]/glibc-static);
> -	else
> +	ifeq ($(call try-cc,$(SOURCE_GLIBC),$(FLAGS_GLIBC)),y)
> +		LIBC_SUPPORT := 1
> +	endif
> +	ifeq ($(BIONIC),1)
> +		LIBC_SUPPORT := 1
> +	endif
> +	ifeq ($(LIBC_SUPPORT),1)
>  		NO_LIBELF := 1
>  		NO_DWARF := 1
>  		NO_DEMANGLE := 1
> +	else
> +		msg := $(error No gnu/libc-version.h found, please install glibc-dev[el]/glibc-static);
>  	endif
>  else
>  	FLAGS_DWARF=$(ALL_CFLAGS) -ldw -lelf $(ALL_LDFLAGS) $(EXTLIBS)
> diff --git a/tools/perf/config/feature-tests.mak b/tools/perf/config/feature-tests.mak
> index eaeb0fd..3ef5ec9 100644
> --- a/tools/perf/config/feature-tests.mak
> +++ b/tools/perf/config/feature-tests.mak
> @@ -43,6 +43,15 @@ int main(void)
>  }
>  endef
>  
> +define SOURCE_BIONIC
> +#include <android/api-level.h>
> +
> +int main(void)
> +{
> +	return __ANDROID_API__;
> +}
> +endef
> +
>  define SOURCE_ELF_MMAP
>  #include <libelf.h>
>  int main(void)
> -- 
> 1.7.9.5
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