[Buildroot] [PATCH] u-boot: Fix building for ARC700

[Arnout Vandecappelle <arnout@mind.be>]

On 23-09-16 14:07, Alexey Brodkin wrote:
> With newer ARC toolchain obsolete -marcXXX were finally deperecated
                                                          deprecated

> and so compiler throws errors now about unknown option.
> 
> Solution is as simple as switching to more generic -mcu-XXX
                                                     -mcpu=arcXXX

> options. Which we do. Unfortunately that change in upstream U-Boot [1]
> happened right after v2016.09 was released an so we need to have that fix
> for v2016.07 which is mentioned in axs10x defconfigs and for the latest
> U-Boot release v2016.09 (which is selected by default if no defconfig is
> used).

 It's unfortunate that the deprecation period was so short, and that U-Boot
didn't fix it sooner.

 I really don't like adding patches to U-Boot, because you never know what
version will be used. In this case, however, it's just for ARC configs which is
pretty controlled, and in the likely case that someone has a custom U-Boot fork,
they can easily apply the patch themselves. So

Reviewed-by: Arnout Vandecappelle (Essensium/Mind) <arnout@mind.be>


 Regards,
 Arnout

> Once we deprecate either U-Boot version in U-Boot corresponding patch
> should be removed essentially.
> 
> [1] http://git.denx.de/?p=u-boot.git;a=commit;h=7c8d81605302e7d7fdd3e7d8eb69302bddc64a2c
> 
> Signed-off-by: Alexey Brodkin <abrodkin@synopsys.com>
> Cc: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>
> Cc: Peter Korsgaard <peter@korsgaard.com>
> ---
>  ...-Use-mcpu-XXX-instead-of-obsolete-marcXXX.patch | 39 ++++++++++++++++++++++
>  ...-Use-mcpu-XXX-instead-of-obsolete-marcXXX.patch | 39 ++++++++++++++++++++++
>  2 files changed, 78 insertions(+)
>  create mode 100644 boot/uboot/2016.07/0001-arc-Use-mcpu-XXX-instead-of-obsolete-marcXXX.patch
>  create mode 100644 boot/uboot/2016.09/0001-arc-Use-mcpu-XXX-instead-of-obsolete-marcXXX.patch
> 
> diff --git a/boot/uboot/2016.07/0001-arc-Use-mcpu-XXX-instead-of-obsolete-marcXXX.patch b/boot/uboot/2016.07/0001-arc-Use-mcpu-XXX-instead-of-obsolete-marcXXX.patch
> new file mode 100644
> index 0000000..eded9a3
> --- /dev/null
> +++ b/boot/uboot/2016.07/0001-arc-Use-mcpu-XXX-instead-of-obsolete-marcXXX.patch
> @@ -0,0 +1,39 @@
> +From 7c8d81605302e7d7fdd3e7d8eb69302bddc64a2c Mon Sep 17 00:00:00 2001
> +From: Alexey Brodkin <abrodkin@synopsys.com>
> +Date: Fri, 16 Sep 2016 12:12:26 +0300
> +Subject: [PATCH] arc: Use -mcpu=XXX instead of obsolete -marcXXX
> +
> +With newer ARC tools old way of CPU specification gets obsolete,
> +so we're switching to newer and more common way of setting "-mcpu".
> +
> +Signed-off-by: Alexey Brodkin <abrodkin@synopsys.com>
> +---
> + arch/arc/config.mk | 6 +++---
> + 1 file changed, 3 insertions(+), 3 deletions(-)
> +
> +diff --git a/arch/arc/config.mk b/arch/arc/config.mk
> +index 7c974f0..13676bd 100644
> +--- a/arch/arc/config.mk
> ++++ b/arch/arc/config.mk
> +@@ -31,15 +31,15 @@ CONFIG_MMU = 1
> + endif
> + 
> + ifdef CONFIG_CPU_ARC750D
> +-PLATFORM_CPPFLAGS += -marc700
> ++PLATFORM_CPPFLAGS += -mcpu=arc700
> + endif
> + 
> + ifdef CONFIG_CPU_ARC770D
> +-PLATFORM_CPPFLAGS += -marc700 -mlock -mswape
> ++PLATFORM_CPPFLAGS += -mcpu=arc700 -mlock -mswape
> + endif
> + 
> + ifdef CONFIG_CPU_ARCEM6
> +-PLATFORM_CPPFLAGS += -marcem
> ++PLATFORM_CPPFLAGS += -mcpu=arcem
> + endif
> + 
> + ifdef CONFIG_CPU_ARCHS34
> +-- 
> +2.7.4
> +
> diff --git a/boot/uboot/2016.09/0001-arc-Use-mcpu-XXX-instead-of-obsolete-marcXXX.patch b/boot/uboot/2016.09/0001-arc-Use-mcpu-XXX-instead-of-obsolete-marcXXX.patch
> new file mode 100644
> index 0000000..eded9a3
> --- /dev/null
> +++ b/boot/uboot/2016.09/0001-arc-Use-mcpu-XXX-instead-of-obsolete-marcXXX.patch
> @@ -0,0 +1,39 @@
> +From 7c8d81605302e7d7fdd3e7d8eb69302bddc64a2c Mon Sep 17 00:00:00 2001
> +From: Alexey Brodkin <abrodkin@synopsys.com>
> +Date: Fri, 16 Sep 2016 12:12:26 +0300
> +Subject: [PATCH] arc: Use -mcpu=XXX instead of obsolete -marcXXX
> +
> +With newer ARC tools old way of CPU specification gets obsolete,
> +so we're switching to newer and more common way of setting "-mcpu".
> +
> +Signed-off-by: Alexey Brodkin <abrodkin@synopsys.com>
> +---
> + arch/arc/config.mk | 6 +++---
> + 1 file changed, 3 insertions(+), 3 deletions(-)
> +
> +diff --git a/arch/arc/config.mk b/arch/arc/config.mk
> +index 7c974f0..13676bd 100644
> +--- a/arch/arc/config.mk
> ++++ b/arch/arc/config.mk
> +@@ -31,15 +31,15 @@ CONFIG_MMU = 1
> + endif
> + 
> + ifdef CONFIG_CPU_ARC750D
> +-PLATFORM_CPPFLAGS += -marc700
> ++PLATFORM_CPPFLAGS += -mcpu=arc700
> + endif
> + 
> + ifdef CONFIG_CPU_ARC770D
> +-PLATFORM_CPPFLAGS += -marc700 -mlock -mswape
> ++PLATFORM_CPPFLAGS += -mcpu=arc700 -mlock -mswape
> + endif
> + 
> + ifdef CONFIG_CPU_ARCEM6
> +-PLATFORM_CPPFLAGS += -marcem
> ++PLATFORM_CPPFLAGS += -mcpu=arcem
> + endif
> + 
> + ifdef CONFIG_CPU_ARCHS34
> +-- 
> +2.7.4
> +
> 

-- 
Arnout Vandecappelle                          arnout at mind be
Senior Embedded Software Architect            +32-16-286500
Essensium/Mind                                http://www.mind.be
G.Geenslaan 9, 3001 Leuven, Belgium           BE 872 984 063 RPR Leuven
LinkedIn profile: http://www.linkedin.com/in/arnoutvandecappelle
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