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* [PATCH] objtool: query pkg-config for libelf location
@ 2019-03-19  7:20 Rolf Eike Beer
  2019-03-20 15:37 ` Josh Poimboeuf
  0 siblings, 1 reply; 6+ messages in thread
From: Rolf Eike Beer @ 2019-03-19  7:20 UTC (permalink / raw)
  To: Josh Poimboeuf, Peter Zijlstra
  Cc: Masahiro Yamada, Michal Marek, linux-kbuild, linux-kernel

If it is not in the default location compilation would fail at several points.

Signed-off-by: Rolf Eike Beer <eb@emlix.com>
---
 Makefile               | 4 +++-
 tools/objtool/Makefile | 7 +++++--
 2 files changed, 8 insertions(+), 3 deletions(-)

diff --git a/Makefile b/Makefile
index 9ef547fc7ffe..666b52c1c5f4 100644
--- a/Makefile
+++ b/Makefile
@@ -940,9 +940,11 @@ mod_sign_cmd = true
 endif
 export mod_sign_cmd
 
+HOST_LIBELF_LIBS = $(shell pkg-config libelf --libs 2>/dev/null || echo -lelf)
+
 ifdef CONFIG_STACK_VALIDATION
   has_libelf := $(call try-run,\
-		echo "int main() {}" | $(HOSTCC) -xc -o /dev/null -lelf -,1,0)
+		echo "int main() {}" | $(HOSTCC) -xc -o /dev/null $(HOST_LIBELF_LIBS) -,1,0)
   ifeq ($(has_libelf),1)
     objtool_target := tools/objtool FORCE
   else
diff --git a/tools/objtool/Makefile b/tools/objtool/Makefile
index c9d038f91af6..0c8dd1609348 100644
--- a/tools/objtool/Makefile
+++ b/tools/objtool/Makefile
@@ -25,14 +25,17 @@ LIBSUBCMD		= $(LIBSUBCMD_OUTPUT)libsubcmd.a
 OBJTOOL    := $(OUTPUT)objtool
 OBJTOOL_IN := $(OBJTOOL)-in.o
 
+LIBELF_FLAGS = $(shell pkg-config libelf --cflags)
+LIBELF_LIBS = $(shell pkg-config libelf --libs 2>/dev/null || echo -lelf)
+
 all: $(OBJTOOL)
 
 INCLUDES := -I$(srctree)/tools/include \
 	    -I$(srctree)/tools/arch/$(HOSTARCH)/include/uapi \
 	    -I$(srctree)/tools/objtool/arch/$(ARCH)/include
 WARNINGS := $(EXTRA_WARNINGS) -Wno-switch-default -Wno-switch-enum -Wno-packed
-CFLAGS   += -Werror $(WARNINGS) $(KBUILD_HOSTCFLAGS) -g $(INCLUDES)
-LDFLAGS  += -lelf $(LIBSUBCMD) $(KBUILD_HOSTLDFLAGS)
+CFLAGS   += -Werror $(WARNINGS) $(KBUILD_HOSTCFLAGS) -g $(INCLUDES) $(LIBELF_FLAGS)
+LDFLAGS  += $(LIBELF_LIBS) $(LIBSUBCMD) $(KBUILD_HOSTLDFLAGS)
 
 # Allow old libelf to be used:
 elfshdr := $(shell echo '$(pound)include <libelf.h>' | $(CC) $(CFLAGS) -x c -E - | grep elf_getshdr)
-- 
2.21.0


-- 
Rolf Eike Beer, emlix GmbH, http://www.emlix.com
Fon +49 551 30664-0, Fax +49 551 30664-11
Gothaer Platz 3, 37083 Göttingen, Germany
Sitz der Gesellschaft: Göttingen, Amtsgericht Göttingen HR B 3160
Geschäftsführung: Heike Jordan, Dr. Uwe Kracke – Ust-IdNr.: DE 205 198 055

emlix - smart embedded open source




^ permalink raw reply related	[flat|nested] 6+ messages in thread
* Re: [PATCH] objtool: query pkg-config for libelf location
  2019-03-19  7:20 [PATCH] objtool: query pkg-config for libelf location Rolf Eike Beer
@ 2019-03-20 15:37 ` Josh Poimboeuf
  2019-03-20 15:50   ` Rolf Eike Beer
  0 siblings, 1 reply; 6+ messages in thread
From: Josh Poimboeuf @ 2019-03-20 15:37 UTC (permalink / raw)
  To: Rolf Eike Beer
  Cc: Peter Zijlstra, Masahiro Yamada, Michal Marek, linux-kbuild,
	linux-kernel

On Tue, Mar 19, 2019 at 08:20:12AM +0100, Rolf Eike Beer wrote:
> If it is not in the default location compilation would fail at several points.
> 
> Signed-off-by: Rolf Eike Beer <eb@emlix.com>
> ---
>  Makefile               | 4 +++-
>  tools/objtool/Makefile | 7 +++++--
>  2 files changed, 8 insertions(+), 3 deletions(-)
> 
> diff --git a/Makefile b/Makefile
> index 9ef547fc7ffe..666b52c1c5f4 100644
> --- a/Makefile
> +++ b/Makefile
> @@ -940,9 +940,11 @@ mod_sign_cmd = true
>  endif
>  export mod_sign_cmd
>  
> +HOST_LIBELF_LIBS = $(shell pkg-config libelf --libs 2>/dev/null || echo -lelf)
> +
>  ifdef CONFIG_STACK_VALIDATION
>    has_libelf := $(call try-run,\
> -		echo "int main() {}" | $(HOSTCC) -xc -o /dev/null -lelf -,1,0)
> +		echo "int main() {}" | $(HOSTCC) -xc -o /dev/null $(HOST_LIBELF_LIBS) -,1,0)
>    ifeq ($(has_libelf),1)
>      objtool_target := tools/objtool FORCE
>    else
> diff --git a/tools/objtool/Makefile b/tools/objtool/Makefile
> index c9d038f91af6..0c8dd1609348 100644
> --- a/tools/objtool/Makefile
> +++ b/tools/objtool/Makefile
> @@ -25,14 +25,17 @@ LIBSUBCMD		= $(LIBSUBCMD_OUTPUT)libsubcmd.a
>  OBJTOOL    := $(OUTPUT)objtool
>  OBJTOOL_IN := $(OBJTOOL)-in.o
>  
> +LIBELF_FLAGS = $(shell pkg-config libelf --cflags)
> +LIBELF_LIBS = $(shell pkg-config libelf --libs 2>/dev/null || echo -lelf)

Should LIBELF_FLAGS also pipe stderr to /dev/null?

> +
>  all: $(OBJTOOL)
>  
>  INCLUDES := -I$(srctree)/tools/include \
>  	    -I$(srctree)/tools/arch/$(HOSTARCH)/include/uapi \
>  	    -I$(srctree)/tools/objtool/arch/$(ARCH)/include
>  WARNINGS := $(EXTRA_WARNINGS) -Wno-switch-default -Wno-switch-enum -Wno-packed
> -CFLAGS   += -Werror $(WARNINGS) $(KBUILD_HOSTCFLAGS) -g $(INCLUDES)
> -LDFLAGS  += -lelf $(LIBSUBCMD) $(KBUILD_HOSTLDFLAGS)
> +CFLAGS   += -Werror $(WARNINGS) $(KBUILD_HOSTCFLAGS) -g $(INCLUDES) $(LIBELF_FLAGS)
> +LDFLAGS  += $(LIBELF_LIBS) $(LIBSUBCMD) $(KBUILD_HOSTLDFLAGS)
>  
>  # Allow old libelf to be used:
>  elfshdr := $(shell echo '$(pound)include <libelf.h>' | $(CC) $(CFLAGS) -x c -E - | grep elf_getshdr)
> -- 
> 2.21.0
> 
> 
> -- 
> Rolf Eike Beer, emlix GmbH, http://www.emlix.com
> Fon +49 551 30664-0, Fax +49 551 30664-11
> Gothaer Platz 3, 37083 Göttingen, Germany
> Sitz der Gesellschaft: Göttingen, Amtsgericht Göttingen HR B 3160
> Geschäftsführung: Heike Jordan, Dr. Uwe Kracke – Ust-IdNr.: DE 205 198 055
> 
> emlix - smart embedded open source
> 
> 
> 

-- 
Josh

^ permalink raw reply	[flat|nested] 6+ messages in thread
* Re: [PATCH] objtool: query pkg-config for libelf location
  2019-03-20 15:37 ` Josh Poimboeuf
@ 2019-03-20 15:50   ` Rolf Eike Beer
  2019-03-20 15:58     ` [PATCH v2] " Rolf Eike Beer
  0 siblings, 1 reply; 6+ messages in thread
From: Rolf Eike Beer @ 2019-03-20 15:50 UTC (permalink / raw)
  To: Josh Poimboeuf
  Cc: Peter Zijlstra, Masahiro Yamada, Michal Marek, linux-kbuild,
	linux-kernel

[-- Attachment #1: Type: text/plain, Size: 1004 bytes --]

Josh Poimboeuf wrote:
> On Tue, Mar 19, 2019 at 08:20:12AM +0100, Rolf Eike Beer wrote:

> > diff --git a/tools/objtool/Makefile b/tools/objtool/Makefile
> > index c9d038f91af6..0c8dd1609348 100644
> > --- a/tools/objtool/Makefile
> > +++ b/tools/objtool/Makefile
> > @@ -25,14 +25,17 @@ LIBSUBCMD		= $(LIBSUBCMD_OUTPUT)libsubcmd.a
> > 
> >  OBJTOOL    := $(OUTPUT)objtool
> >  OBJTOOL_IN := $(OBJTOOL)-in.o
> > 
> > +LIBELF_FLAGS = $(shell pkg-config libelf --cflags)
> > +LIBELF_LIBS = $(shell pkg-config libelf --libs 2>/dev/null || echo -lelf)
> 
> Should LIBELF_FLAGS also pipe stderr to /dev/null?

Probably. New version in a minute.

Thanks,

Eike
-- 
Rolf Eike Beer, emlix GmbH, http://www.emlix.com
Fon +49 551 30664-0, Fax +49 551 30664-11
Gothaer Platz 3, 37083 Göttingen, Germany
Sitz der Gesellschaft: Göttingen, Amtsgericht Göttingen HR B 3160
Geschäftsführung: Heike Jordan, Dr. Uwe Kracke – Ust-IdNr.: DE 205 198 055

emlix - smart embedded open source

[-- Attachment #2: This is a digitally signed message part. --]
[-- Type: application/pgp-signature, Size: 313 bytes --]

^ permalink raw reply	[flat|nested] 6+ messages in thread
* [PATCH v2] objtool: query pkg-config for libelf location
  2019-03-20 15:50   ` Rolf Eike Beer
@ 2019-03-20 15:58     ` Rolf Eike Beer
  2019-03-20 16:03       ` Josh Poimboeuf
  0 siblings, 1 reply; 6+ messages in thread
From: Rolf Eike Beer @ 2019-03-20 15:58 UTC (permalink / raw)
  To: Josh Poimboeuf
  Cc: Peter Zijlstra, Masahiro Yamada, Michal Marek, linux-kbuild,
	linux-kernel

[-- Attachment #1: Type: text/plain, Size: 2391 bytes --]

If it is not in the default location compilation would fail at several points.

Signed-off-by: Rolf Eike Beer <eb@emlix.com>
---
Changes in v2:
  -also hide stderr when querying cflags
  -use ":=" assignment as in other places in that file

 Makefile               | 4 +++-
 tools/objtool/Makefile | 7 +++++--
 2 files changed, 8 insertions(+), 3 deletions(-)

diff --git a/Makefile b/Makefile
index 99c0530489ef..32caf30e0d79 100644
--- a/Makefile
+++ b/Makefile
@@ -950,9 +950,11 @@ mod_sign_cmd = true
 endif
 export mod_sign_cmd
 
+HOST_LIBELF_LIBS = $(shell pkg-config libelf --libs 2>/dev/null || echo -lelf)
+
 ifdef CONFIG_STACK_VALIDATION
   has_libelf := $(call try-run,\
-		echo "int main() {}" | $(HOSTCC) -xc -o /dev/null -lelf -,1,0)
+		echo "int main() {}" | $(HOSTCC) -xc -o /dev/null $(HOST_LIBELF_LIBS) -,1,0)
   ifeq ($(has_libelf),1)
     objtool_target := tools/objtool FORCE
   else
diff --git a/tools/objtool/Makefile b/tools/objtool/Makefile
index c9d038f91af6..53f8be0f4a1f 100644
--- a/tools/objtool/Makefile
+++ b/tools/objtool/Makefile
@@ -25,14 +25,17 @@ LIBSUBCMD		= $(LIBSUBCMD_OUTPUT)libsubcmd.a
 OBJTOOL    := $(OUTPUT)objtool
 OBJTOOL_IN := $(OBJTOOL)-in.o
 
+LIBELF_FLAGS := $(shell pkg-config libelf --cflags 2>/dev/null)
+LIBELF_LIBS  := $(shell pkg-config libelf --libs 2>/dev/null || echo -lelf)
+
 all: $(OBJTOOL)
 
 INCLUDES := -I$(srctree)/tools/include \
 	    -I$(srctree)/tools/arch/$(HOSTARCH)/include/uapi \
 	    -I$(srctree)/tools/objtool/arch/$(ARCH)/include
 WARNINGS := $(EXTRA_WARNINGS) -Wno-switch-default -Wno-switch-enum -Wno-packed
-CFLAGS   += -Werror $(WARNINGS) $(KBUILD_HOSTCFLAGS) -g $(INCLUDES)
-LDFLAGS  += -lelf $(LIBSUBCMD) $(KBUILD_HOSTLDFLAGS)
+CFLAGS   += -Werror $(WARNINGS) $(KBUILD_HOSTCFLAGS) -g $(INCLUDES) $(LIBELF_FLAGS)
+LDFLAGS  += $(LIBELF_LIBS) $(LIBSUBCMD) $(KBUILD_HOSTLDFLAGS)
 
 # Allow old libelf to be used:
 elfshdr := $(shell echo '$(pound)include <libelf.h>' | $(CC) $(CFLAGS) -x c -E - | grep elf_getshdr)
-- 
2.21.0

-- 
Rolf Eike Beer, emlix GmbH, http://www.emlix.com
Fon +49 551 30664-0, Fax +49 551 30664-11
Gothaer Platz 3, 37083 Göttingen, Germany
Sitz der Gesellschaft: Göttingen, Amtsgericht Göttingen HR B 3160
Geschäftsführung: Heike Jordan, Dr. Uwe Kracke – Ust-IdNr.: DE 205 198 055

emlix - smart embedded open source

[-- Attachment #2: This is a digitally signed message part. --]
[-- Type: application/pgp-signature, Size: 313 bytes --]

^ permalink raw reply related	[flat|nested] 6+ messages in thread
* Re: [PATCH v2] objtool: query pkg-config for libelf location
  2019-03-20 15:58     ` [PATCH v2] " Rolf Eike Beer
@ 2019-03-20 16:03       ` Josh Poimboeuf
  0 siblings, 0 replies; 6+ messages in thread
From: Josh Poimboeuf @ 2019-03-20 16:03 UTC (permalink / raw)
  To: Rolf Eike Beer
  Cc: Peter Zijlstra, Masahiro Yamada, Michal Marek, linux-kbuild,
	linux-kernel

On Wed, Mar 20, 2019 at 04:58:26PM +0100, Rolf Eike Beer wrote:
> If it is not in the default location compilation would fail at several points.
> 
> Signed-off-by: Rolf Eike Beer <eb@emlix.com>

Looks fine to me.  If the kbuild folks don't have any comments, I'll
send it along to the -tip tree soonish.

> ---
> Changes in v2:
>   -also hide stderr when querying cflags
>   -use ":=" assignment as in other places in that file
> 
>  Makefile               | 4 +++-
>  tools/objtool/Makefile | 7 +++++--
>  2 files changed, 8 insertions(+), 3 deletions(-)
> 
> diff --git a/Makefile b/Makefile
> index 99c0530489ef..32caf30e0d79 100644
> --- a/Makefile
> +++ b/Makefile
> @@ -950,9 +950,11 @@ mod_sign_cmd = true
>  endif
>  export mod_sign_cmd
>  
> +HOST_LIBELF_LIBS = $(shell pkg-config libelf --libs 2>/dev/null || echo -lelf)
> +
>  ifdef CONFIG_STACK_VALIDATION
>    has_libelf := $(call try-run,\
> -		echo "int main() {}" | $(HOSTCC) -xc -o /dev/null -lelf -,1,0)
> +		echo "int main() {}" | $(HOSTCC) -xc -o /dev/null $(HOST_LIBELF_LIBS) -,1,0)
>    ifeq ($(has_libelf),1)
>      objtool_target := tools/objtool FORCE
>    else
> diff --git a/tools/objtool/Makefile b/tools/objtool/Makefile
> index c9d038f91af6..53f8be0f4a1f 100644
> --- a/tools/objtool/Makefile
> +++ b/tools/objtool/Makefile
> @@ -25,14 +25,17 @@ LIBSUBCMD		= $(LIBSUBCMD_OUTPUT)libsubcmd.a
>  OBJTOOL    := $(OUTPUT)objtool
>  OBJTOOL_IN := $(OBJTOOL)-in.o
>  
> +LIBELF_FLAGS := $(shell pkg-config libelf --cflags 2>/dev/null)
> +LIBELF_LIBS  := $(shell pkg-config libelf --libs 2>/dev/null || echo -lelf)
> +
>  all: $(OBJTOOL)
>  
>  INCLUDES := -I$(srctree)/tools/include \
>  	    -I$(srctree)/tools/arch/$(HOSTARCH)/include/uapi \
>  	    -I$(srctree)/tools/objtool/arch/$(ARCH)/include
>  WARNINGS := $(EXTRA_WARNINGS) -Wno-switch-default -Wno-switch-enum -Wno-packed
> -CFLAGS   += -Werror $(WARNINGS) $(KBUILD_HOSTCFLAGS) -g $(INCLUDES)
> -LDFLAGS  += -lelf $(LIBSUBCMD) $(KBUILD_HOSTLDFLAGS)
> +CFLAGS   += -Werror $(WARNINGS) $(KBUILD_HOSTCFLAGS) -g $(INCLUDES) $(LIBELF_FLAGS)
> +LDFLAGS  += $(LIBELF_LIBS) $(LIBSUBCMD) $(KBUILD_HOSTLDFLAGS)
>  
>  # Allow old libelf to be used:
>  elfshdr := $(shell echo '$(pound)include <libelf.h>' | $(CC) $(CFLAGS) -x c -E - | grep elf_getshdr)
> -- 
> 2.21.0
> 
> -- 
> Rolf Eike Beer, emlix GmbH, http://www.emlix.com
> Fon +49 551 30664-0, Fax +49 551 30664-11
> Gothaer Platz 3, 37083 Göttingen, Germany
> Sitz der Gesellschaft: Göttingen, Amtsgericht Göttingen HR B 3160
> Geschäftsführung: Heike Jordan, Dr. Uwe Kracke – Ust-IdNr.: DE 205 198 055
> 
> emlix - smart embedded open source



-- 
Josh

^ permalink raw reply	[flat|nested] 6+ messages in thread
* [PATCH] objtool: Query pkg-config for libelf location
@ 2019-03-26 17:48 Josh Poimboeuf
  0 siblings, 0 replies; 6+ messages in thread
From: Josh Poimboeuf @ 2019-03-26 17:48 UTC (permalink / raw)
  To: x86; +Cc: linux-kernel, Rolf Eike Beer

From: Rolf Eike Beer <eb@emlix.com>

If it is not in the default location, compilation would fail at several
points.

Signed-off-by: Rolf Eike Beer <eb@emlix.com>
Signed-off-by: Josh Poimboeuf <jpoimboe@redhat.com>
---
 Makefile               | 4 +++-
 tools/objtool/Makefile | 7 +++++--
 2 files changed, 8 insertions(+), 3 deletions(-)

diff --git a/Makefile b/Makefile
index 99c0530489ef..32caf30e0d79 100644
--- a/Makefile
+++ b/Makefile
@@ -950,9 +950,11 @@ mod_sign_cmd = true
 endif
 export mod_sign_cmd
 
+HOST_LIBELF_LIBS = $(shell pkg-config libelf --libs 2>/dev/null || echo -lelf)
+
 ifdef CONFIG_STACK_VALIDATION
   has_libelf := $(call try-run,\
-		echo "int main() {}" | $(HOSTCC) -xc -o /dev/null -lelf -,1,0)
+		echo "int main() {}" | $(HOSTCC) -xc -o /dev/null $(HOST_LIBELF_LIBS) -,1,0)
   ifeq ($(has_libelf),1)
     objtool_target := tools/objtool FORCE
   else
diff --git a/tools/objtool/Makefile b/tools/objtool/Makefile
index c9d038f91af6..53f8be0f4a1f 100644
--- a/tools/objtool/Makefile
+++ b/tools/objtool/Makefile
@@ -25,14 +25,17 @@ LIBSUBCMD		= $(LIBSUBCMD_OUTPUT)libsubcmd.a
 OBJTOOL    := $(OUTPUT)objtool
 OBJTOOL_IN := $(OBJTOOL)-in.o
 
+LIBELF_FLAGS := $(shell pkg-config libelf --cflags 2>/dev/null)
+LIBELF_LIBS  := $(shell pkg-config libelf --libs 2>/dev/null || echo -lelf)
+
 all: $(OBJTOOL)
 
 INCLUDES := -I$(srctree)/tools/include \
 	    -I$(srctree)/tools/arch/$(HOSTARCH)/include/uapi \
 	    -I$(srctree)/tools/objtool/arch/$(ARCH)/include
 WARNINGS := $(EXTRA_WARNINGS) -Wno-switch-default -Wno-switch-enum -Wno-packed
-CFLAGS   += -Werror $(WARNINGS) $(KBUILD_HOSTCFLAGS) -g $(INCLUDES)
-LDFLAGS  += -lelf $(LIBSUBCMD) $(KBUILD_HOSTLDFLAGS)
+CFLAGS   += -Werror $(WARNINGS) $(KBUILD_HOSTCFLAGS) -g $(INCLUDES) $(LIBELF_FLAGS)
+LDFLAGS  += $(LIBELF_LIBS) $(LIBSUBCMD) $(KBUILD_HOSTLDFLAGS)
 
 # Allow old libelf to be used:
 elfshdr := $(shell echo '$(pound)include <libelf.h>' | $(CC) $(CFLAGS) -x c -E - | grep elf_getshdr)
-- 
2.17.2


^ permalink raw reply related	[flat|nested] 6+ messages in thread
end of thread, other threads:[~2019-03-26 17:48 UTC | newest]

Thread overview: 6+ messages (download: mbox.gz / follow: Atom feed)
-- links below jump to the message on this page --
2019-03-19  7:20 [PATCH] objtool: query pkg-config for libelf location Rolf Eike Beer
2019-03-20 15:37 ` Josh Poimboeuf
2019-03-20 15:50   ` Rolf Eike Beer
2019-03-20 15:58     ` [PATCH v2] " Rolf Eike Beer
2019-03-20 16:03       ` Josh Poimboeuf
2019-03-26 17:48 [PATCH] objtool: Query " Josh Poimboeuf

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