[Buildroot] [PATCH 1/2] package/efl: add libunwind optional dependency

[Buildroot] [PATCH 1/2] package/efl: add libunwind optional dependency

[Romain Naour]

There is no configure option to enable/disable libunwind support.
See efl/m4/efl_libunwind.m4

Signed-off-by: Romain Naour <romain.naour@gmail.com>
---
 package/efl/efl.mk | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/package/efl/efl.mk b/package/efl/efl.mk
index 4008d30..04e15f5 100644
--- a/package/efl/efl.mk
+++ b/package/efl/efl.mk
@@ -293,6 +293,10 @@ endef
 EFL_POST_INSTALL_TARGET_HOOKS = EFL_HOOK_REMOVE_UPOWER
 endif
 
+ifeq ($(BR2_PACKAGE_LIBUNWIND),y)
+EFL_DEPENDENCIES += libunwind
+endif
+
 $(eval $(autotools-package))
 
 ################################################################################
-- 
2.9.3

[Buildroot] [PATCH 2/2] package/libunwind: disable for x86 with uClibc toolchain

[Romain Naour]

libunwind use sigreturn() while building for x86 [1] but this function
is not available with uClibc-ng.

This throw a warning during libunwind build:
In file included from x86/Los-linux.c:4:0:
x86/Gos-linux.c: In function ?_ULx86_local_resume?:
x86/Gos-linux.c:298:7: warning: implicit declaration of function ?sigreturn? [-Wimplicit-function-declaration]
       sigreturn (sc);
       ^

But any program trying to link against libunwind-generic.so fail to build:
[...]usr/lib/libunwind-generic.so: undefined reference to `sigreturn'
collect2: error: ld returned 1 exit status

Disable libunwind for x86 target when uClibc-ng is used.

Fixes:
http://autobuild.buildroot.net/results/54a/54afac8148cff5f3c17e83f80917fd9006948fe0//build-end.log

[1] http://git.savannah.gnu.org/gitweb/?p=libunwind.git;a=blob;f=src/x86/Gos-linux.c;h=17aebc2974af50eb0bf8292689b2ed22a4c97866;hb=HEAD#l299

Signed-off-by: Romain Naour <romain.naour@gmail.com>
---
 package/libunwind/Config.in | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/package/libunwind/Config.in b/package/libunwind/Config.in
index 5527a2b..9007ce5 100644
--- a/package/libunwind/Config.in
+++ b/package/libunwind/Config.in
@@ -15,7 +15,7 @@ config BR2_PACKAGE_LIBUNWIND_ARCH_SUPPORTS
 		 BR2_mips64el || BR2_powerpc || BR2_sh || BR2_i386 || BR2_x86_64)
 	default y if BR2_TOOLCHAIN_USES_UCLIBC && \
 		(((BR2_arm || BR2_armeb) && BR2_ARM_CPU_HAS_ARM) || \
-		 BR2_i386 || BR2_mips || BR2_mipsel || \
+		 BR2_mips || BR2_mipsel || \
 		 BR2_mips64 || BR2_mips64el || BR2_x86_64)
 	default y if BR2_TOOLCHAIN_USES_MUSL && \
 		(((BR2_arm || BR2_armeb) && BR2_ARM_CPU_HAS_ARM) || \
-- 
2.9.3

[Buildroot] [PATCH 2/2] package/libunwind: disable for x86 with uClibc toolchain

[Yann E. MORIN]

On 2017-04-16 21:49 +0200, Romain Naour spake thusly:
> libunwind use sigreturn() while building for x86 [1] but this function
> is not available with uClibc-ng.
> 
> This throw a warning during libunwind build:
> In file included from x86/Los-linux.c:4:0:
> x86/Gos-linux.c: In function ?_ULx86_local_resume?:
> x86/Gos-linux.c:298:7: warning: implicit declaration of function ?sigreturn? [-Wimplicit-function-declaration]
>        sigreturn (sc);
>        ^
> 
> But any program trying to link against libunwind-generic.so fail to build:

It's not only about libunwind-generic.so, see below...

> [...]usr/lib/libunwind-generic.so: undefined reference to `sigreturn'
> collect2: error: ld returned 1 exit status
> 
> Disable libunwind for x86 target when uClibc-ng is used.
> 
> Fixes:
> http://autobuild.buildroot.net/results/54a/54afac8148cff5f3c17e83f80917fd9006948fe0//build-end.log

... as it lso fixes:
http://autobuild.buildroot.org/results/0d1/0d1da7fa32b2f659816c51a05de96f26fef163e4/build-end.log

[...]/output/host/usr/i686-buildroot-linux-uclibc/sysroot/usr/lib/libunwind.so:
undefined reference to `sigreturn'

Tested-by: "Yann E. MORIN" <yann.morin.1998@free.fr>
Acked-by: "Yann E. MORIN" <yann.morin.1998@free.fr>

Regards,
Yann E. MORIN.

> 
> [1] http://git.savannah.gnu.org/gitweb/?p=libunwind.git;a=blob;f=src/x86/Gos-linux.c;h=17aebc2974af50eb0bf8292689b2ed22a4c97866;hb=HEAD#l299
> 
> Signed-off-by: Romain Naour <romain.naour@gmail.com>
> ---
>  package/libunwind/Config.in | 2 +-
>  1 file changed, 1 insertion(+), 1 deletion(-)
> 
> diff --git a/package/libunwind/Config.in b/package/libunwind/Config.in
> index 5527a2b..9007ce5 100644
> --- a/package/libunwind/Config.in
> +++ b/package/libunwind/Config.in
> @@ -15,7 +15,7 @@ config BR2_PACKAGE_LIBUNWIND_ARCH_SUPPORTS
>  		 BR2_mips64el || BR2_powerpc || BR2_sh || BR2_i386 || BR2_x86_64)
>  	default y if BR2_TOOLCHAIN_USES_UCLIBC && \
>  		(((BR2_arm || BR2_armeb) && BR2_ARM_CPU_HAS_ARM) || \
> -		 BR2_i386 || BR2_mips || BR2_mipsel || \
> +		 BR2_mips || BR2_mipsel || \
>  		 BR2_mips64 || BR2_mips64el || BR2_x86_64)
>  	default y if BR2_TOOLCHAIN_USES_MUSL && \
>  		(((BR2_arm || BR2_armeb) && BR2_ARM_CPU_HAS_ARM) || \
> -- 
> 2.9.3
> 
> _______________________________________________
> buildroot mailing list
> buildroot at busybox.net
> http://lists.busybox.net/mailman/listinfo/buildroot

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[Buildroot] [PATCH 1/2] package/efl: add libunwind optional dependency

[Thomas Petazzoni]

Hello,

On Sun, 16 Apr 2017 21:49:05 +0200, Romain Naour wrote:
> There is no configure option to enable/disable libunwind support.
> See efl/m4/efl_libunwind.m4
> 
> Signed-off-by: Romain Naour <romain.naour@gmail.com>
> ---
>  package/efl/efl.mk | 4 ++++
>  1 file changed, 4 insertions(+)

Both applied. Thanks!

Thomas
-- 
Thomas Petazzoni, CTO, Free Electrons
Embedded Linux, Kernel and Android engineering
http://free-electrons.com