[Buildroot] [PATCH 1/2] configs/sipeed_licheepi_4a_defconfig: glibc needs gcc >= 15

[Buildroot] [PATCH 1/2] configs/sipeed_licheepi_4a_defconfig: glibc needs gcc >= 15

[Romain Naour via buildroot]

The sipeed_licheepi_4a defconfig doesn't build since the glibc version
bump to 2.43 [1]. Glibc increased the minimal gcc version for riscv
w/ ISA RVV in commit [2].

Select gcc 15 in this defconfig to be able to build a glibc based
toolchain.

Fixes:
https://gitlab.com/buildroot.org/buildroot/-/jobs/14728914049 (sipeed_licheepi_4a_defconfig)

[1] 227378b5930b681c79a13476ae60a98753a98a03
[2] https://sourceware.org/git/?p=glibc.git;a=commit;h=47975914fb106b83c42bc0baf6435a0944a23d30

Signed-off-by: Romain Naour <romain.naour@smile.fr>
---
 configs/sipeed_licheepi_4a_defconfig | 1 +
 1 file changed, 1 insertion(+)

diff --git a/configs/sipeed_licheepi_4a_defconfig b/configs/sipeed_licheepi_4a_defconfig
index c7867ed05d..602cd50e0b 100644
--- a/configs/sipeed_licheepi_4a_defconfig
+++ b/configs/sipeed_licheepi_4a_defconfig
@@ -2,6 +2,7 @@ BR2_riscv=y
 BR2_RISCV_ISA_RVC=y
 BR2_RISCV_ISA_RVV=y
 BR2_PACKAGE_HOST_LINUX_HEADERS_CUSTOM_6_12=y
+BR2_GCC_VERSION_15_X=y
 BR2_GLOBAL_PATCH_DIR="board/sipeed/licheepi_4a/patches"
 BR2_DOWNLOAD_FORCE_CHECK_HASHES=y
 BR2_TARGET_GENERIC_HOSTNAME="licheepi4a"
-- 
2.54.0

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[Buildroot] [PATCH 2/2] package/glibc: riscv w/ ISA RVV needs gcc >= 15

[Romain Naour via buildroot]

The sipeed_licheepi_4a defconfig doesn't build since the glibc version
bump to 2.43 [1]. Glibc increased the minimal gcc version for riscv
w/ ISA RVV in commit [2].

Add a new glibc dependency on gcc 15 when ISA RVV is enabled.

[1] 227378b5930b681c79a13476ae60a98753a98a03
[2] https://sourceware.org/git/?p=glibc.git;a=commit;h=47975914fb106b83c42bc0baf6435a0944a23d30

Signed-off-by: Romain Naour <romain.naour@smile.fr>
---
 package/glibc/Config.in | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/package/glibc/Config.in b/package/glibc/Config.in
index 2bf44bb70b..8e5b08ab7f 100644
--- a/package/glibc/Config.in
+++ b/package/glibc/Config.in
@@ -27,6 +27,9 @@ config BR2_PACKAGE_GLIBC_ARCH_SUPPORTS
 	# glibc needs atomic instructions, and does not support
 	# single-precision floating point ABIs (ilp32f and lp64f)
 	depends on (BR2_RISCV_ISA_RVA && !BR2_RISCV_ABI_ILP32F && !BR2_RISCV_ABI_LP64F) || !BR2_riscv
+	# glibc >= 2.43 needs at gcc >= 15 when Vector
+	# Instructions (V) are enabled.
+	depends on (BR2_RISCV_ISA_RVV && BR2_TOOLCHAIN_GCC_AT_LEAST_15) || !BR2_riscv
 	depends on BR2_USE_MMU
 
 config BR2_PACKAGE_GLIBC_SUPPORTS
-- 
2.54.0

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Re: [Buildroot] [PATCH 2/2] package/glibc: riscv w/ ISA RVV needs gcc >= 15

[Thomas Petazzoni via buildroot]

Hello,

Adding some maintainers in Cc.

On Sun, Jun 07, 2026 at 11:30:30PM +0200, Romain Naour via buildroot wrote:
> The sipeed_licheepi_4a defconfig doesn't build since the glibc version
> bump to 2.43 [1]. Glibc increased the minimal gcc version for riscv
> w/ ISA RVV in commit [2].
> 
> Add a new glibc dependency on gcc 15 when ISA RVV is enabled.
> 
> [1] 227378b5930b681c79a13476ae60a98753a98a03
> [2] https://sourceware.org/git/?p=glibc.git;a=commit;h=47975914fb106b83c42bc0baf6435a0944a23d30
> 
> Signed-off-by: Romain Naour <romain.naour@smile.fr>
> ---
>  package/glibc/Config.in | 3 +++
>  1 file changed, 3 insertions(+)
> 
> diff --git a/package/glibc/Config.in b/package/glibc/Config.in
> index 2bf44bb70b..8e5b08ab7f 100644
> --- a/package/glibc/Config.in
> +++ b/package/glibc/Config.in
> @@ -27,6 +27,9 @@ config BR2_PACKAGE_GLIBC_ARCH_SUPPORTS
>  	# glibc needs atomic instructions, and does not support
>  	# single-precision floating point ABIs (ilp32f and lp64f)
>  	depends on (BR2_RISCV_ISA_RVA && !BR2_RISCV_ABI_ILP32F && !BR2_RISCV_ABI_LP64F) || !BR2_riscv
> +	# glibc >= 2.43 needs at gcc >= 15 when Vector
> +	# Instructions (V) are enabled.
> +	depends on (BR2_RISCV_ISA_RVV && BR2_TOOLCHAIN_GCC_AT_LEAST_15) || !BR2_riscv

This will hide glibc if gcc 15.x is not used. I was wondering if it
would make more sense to turn things around and hide gcc 14.x instead
if glibc is used on RISC-V RVV-enabled platforms?

Peter, Arnout, Julien, thoughts?

Thomas
-- 
Thomas Petazzoni, co-owner and CEO, Bootlin
Embedded Linux and Kernel engineering and training
https://bootlin.com
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Re: [Buildroot] [PATCH 1/2] configs/sipeed_licheepi_4a_defconfig: glibc needs gcc >= 15

[Thomas Petazzoni via buildroot]

On Sun, Jun 07, 2026 at 11:30:29PM +0200, Romain Naour via buildroot wrote:
> The sipeed_licheepi_4a defconfig doesn't build since the glibc version
> bump to 2.43 [1]. Glibc increased the minimal gcc version for riscv
> w/ ISA RVV in commit [2].
> 
> Select gcc 15 in this defconfig to be able to build a glibc based
> toolchain.
> 
> Fixes:
> https://gitlab.com/buildroot.org/buildroot/-/jobs/14728914049 (sipeed_licheepi_4a_defconfig)
> 
> [1] 227378b5930b681c79a13476ae60a98753a98a03
> [2] https://sourceware.org/git/?p=glibc.git;a=commit;h=47975914fb106b83c42bc0baf6435a0944a23d30
> 
> Signed-off-by: Romain Naour <romain.naour@smile.fr>

Applied to master, thanks!

Best regards,

Thomas Petazzoni
-- 
Thomas Petazzoni, co-owner and CEO, Bootlin
Embedded Linux and Kernel engineering and training
https://bootlin.com
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