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[3/7] glibc: disable automatic libatomic linking

Message ID 20260507173211.672855-4-Hemanth.KumarMD@windriver.com
State Under Review
Headers show
Series gcc: Upgrade GCC to 16.1 release | expand

Commit Message

Hemanth Kumar M D May 7, 2026, 5:32 p.m. UTC 
From: Hemanth Kumar M D <Hemanth.KumarMD@windriver.com>

GCC 16 introduced -flink-libatomic which automatically injects
-latomic_asneeded into link commands via LINK_LIBATOMIC_SPEC. When glibc
is built with a GCC 16 cross-compiler, the compiler would attempt
to link against libatomic which does not exist yet at this stage.
(libatomic is built later as part of gcc-runtime)

Link: https://github.com/gcc-mirror/gcc/commit/e63cf4b130b86dd7dde1bf499d3d40faca10ea2e

Signed-off-by: Hemanth Kumar M D <Hemanth.KumarMD@windriver.com>
---
 meta/recipes-core/glibc/glibc.inc | 3 +++
 1 file changed, 3 insertions(+)
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Patch

diff --git a/meta/recipes-core/glibc/glibc.inc b/meta/recipes-core/glibc/glibc.inc
index 30d93bca77..ac96e640e2 100644
--- a/meta/recipes-core/glibc/glibc.inc
+++ b/meta/recipes-core/glibc/glibc.inc
@@ -49,6 +49,9 @@  EXTRA_OEMAKE += "SHELL=/bin/bash"
 # bash but it can be configured by setting KSHELL Makefile variable
 EXTRA_OEMAKE += "KSHELL=/bin/sh"
 
+TARGET_CC_ARCH += "-fno-link-libatomic"
+SDK_CC_ARCH += "-fno-link-libatomic"
+
 do_configure:prepend() {
 	sed -e "s#/bin/bash#/bin/sh#" -i ${S}/elf/ldd.bash.in
 }