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From: Waldemar Brodkorb <wbx@openadk.org>
To: buildroot@buildroot.org
Subject: [Buildroot] [PATCH] arch/Config.in.arc: clarify float configuration
Date: Mon, 24 Aug 2026 21:34:28 +0200	[thread overview]
Message-ID: <aoycxGKgl6IjLCPv@waldemar-brodkorb.de> (raw)

Select soft-float configurations where appropriate,
checked with all selectable CPU's and uClibc-ng toolchains.

uClibc-ng enabled FENV support for hard-float toolchains
unconditionally in commit 4c5039b80ebbe42db35af189afcff7fb7d5cace6.

Glibc has a preconfigure script to check if the toolchain is a
soft-float toolchain.

Fixes:
 - https://autobuild.buildroot.org/results/d0e735bcd9de979ab74df0c2f5229f7534d1539a

Signed-off-by: Waldemar Brodkorb <wbx@openadk.org>
---
 arch/Config.in.arc | 8 +++++++-
 1 file changed, 7 insertions(+), 1 deletion(-)

diff --git a/arch/Config.in.arc b/arch/Config.in.arc
index f250ae5eeb..8fac281045 100644
--- a/arch/Config.in.arc
+++ b/arch/Config.in.arc
@@ -7,12 +7,15 @@ choice
 
 config BR2_arc750d
 	bool "ARC 750D"
+	select BR2_SOFT_FLOAT
 
 config BR2_arc770d
 	bool "ARC 770D"
+	select BR2_SOFT_FLOAT
 
 config BR2_archs38
 	bool "ARC HS38"
+	select BR2_SOFT_FLOAT
 	help
 	  Generic ARC HS capable of running Linux, i.e. with MMU,
 	  caches and 32-bit multiplier. Also it corresponds to the
@@ -20,6 +23,7 @@ config BR2_archs38
 
 config BR2_archs38_64mpy
 	bool "ARC HS38 with 64-bit mpy"
+	select BR2_SOFT_FLOAT
 	help
 	  Fully featured ARC HS capable of running Linux, i.e. with
 	  MMU, caches and 64-bit multiplier.
@@ -39,15 +43,17 @@ config BR2_archs38_full
 
 config BR2_archs4x_rel31
 	bool "ARC HS48 rel 31"
+	select BR2_SOFT_FLOAT
 	help
 	  Build for HS48 release 3.1
 
 config BR2_archs4x
 	bool "ARC HS48"
+	select BR2_SOFT_FLOAT
 	help
 	  Latest release of HS48 processor
 	   - Dual and Quad multiply and MAC operations
-	   - Double-precision FPU
+	   - Double-precision FPU (optional)
 
 endchoice
 
-- 
2.47.3

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