[Buildroot] [PATCH v2 1/3] toolchain/toolchain-buildroot: enable uclibc for riscv64

[Romain Naour]

Hi Mark,

Le 10/05/2020 à 17:43, Mark Corbin a écrit :
> We can enable uclibc for RISC-V 64 bit now that it has been
> bumped from v1.0.32 to v1.0.34.
> 
> Uclibc has had basic support for RISC-V 64 bit since v1.0.31, but
> shared library and TLS/NPTL support has only been available since
> v1.0.33.
> 
> This update has been tested using qemu_riscv64_virt_defconfig and
> the Buildroot host QEMU.

Since uclibc-ng is the default libc in Buildroot, enabling riscv64 change
implicitly the libc used by qemu_riscv64_virt_defconfig.

Before this patch qemu_riscv64_virt_defconfig used glibc, after it use uclibc-ng
(like other defconfig does).

Maybe add a commit before this one enabling explicitly glibc in
qemu_riscv64_virt_defconfig, then add this commit and finally a third commit
switching qemu_riscv64_virt_defconfig from glibc to uclibc-ng.

Anyway it's good to see new architecture supported in uclibc-ng.

Best regards,
Romain

> 
> Signed-off-by: Mark Corbin <mark at dibsco.co.uk>
> ---
> Changes v1 -> v2:
>   - use BR2_RISCV_64 instead of (BR2_riscv && BR2_ARCH_IS_64)
>     (Thomas P)
> ---
>  package/uclibc/Config.in                |  1 +
>  toolchain/toolchain-buildroot/Config.in | 13 +++++++------
>  2 files changed, 8 insertions(+), 6 deletions(-)
> 
> diff --git a/package/uclibc/Config.in b/package/uclibc/Config.in
> index de2885bc92..f4d4f06462 100644
> --- a/package/uclibc/Config.in
> +++ b/package/uclibc/Config.in
> @@ -101,6 +101,7 @@ config BR2_UCLIBC_TARGET_ARCH
>  	default "mips"	   if BR2_mips || BR2_mipsel || BR2_mips64 || BR2_mips64el
>  	default "or1k"     if BR2_or1k
>  	default "powerpc"  if BR2_powerpc
> +	default "riscv64"  if BR2_RISCV_64
>  	default "sh"	   if BR2_sh
>  	default "sparc"	   if BR2_sparc
>  	default "xtensa"   if BR2_xtensa
> diff --git a/toolchain/toolchain-buildroot/Config.in b/toolchain/toolchain-buildroot/Config.in
> index 8c33b2b4dd..3b2da333a2 100644
> --- a/toolchain/toolchain-buildroot/Config.in
> +++ b/toolchain/toolchain-buildroot/Config.in
> @@ -27,12 +27,13 @@ choice
>  
>  config BR2_TOOLCHAIN_BUILDROOT_UCLIBC
>  	bool "uClibc-ng"
> -	depends on BR2_aarch64 || BR2_aarch64_be || BR2_arcle   || BR2_arceb  || \
> -		   BR2_arm     || BR2_armeb    || \
> -		   BR2_i386    || BR2_m68k   || BR2_microblaze || \
> -		   BR2_mips    || BR2_mipsel || BR2_mips64 || BR2_mips64el || \
> -		   BR2_or1k    || BR2_powerpc || BR2_sh2a   || BR2_sh4	   || \
> -		   BR2_sh4eb   || BR2_sparc   || BR2_xtensa || BR2_x86_64
> +	depends on BR2_aarch64 || BR2_aarch64_be || BR2_arcle      || BR2_arceb    || \
> +		   BR2_arm     || BR2_armeb      || \
> +		   BR2_i386    || BR2_m68k       || BR2_microblaze || \
> +		   BR2_mips    || BR2_mipsel     || BR2_mips64     || BR2_mips64el || \
> +		   BR2_or1k    || BR2_powerpc    || BR2_RISCV_64   || \
> +		   BR2_sh2a    || BR2_sh4	 || BR2_sh4eb      || BR2_sparc    || \
> +		   BR2_xtensa  || BR2_x86_64
>  	select BR2_TOOLCHAIN_USES_UCLIBC
>  	help
>  	  This option selects uClibc-ng as the C library for the
>