#1114556 gcc-15 / 14 in unstable can't build stable kenels anymore

Package:
gcc-15
Source:
gcc-15
Description:
GNU C compiler
Submitter:
Wolfgang Walter
Date:
2025-09-07 07:45:02 UTC
Severity:
normal
#1114556#5
Date:
2025-09-06 22:17:27 UTC
From:
To:
Package: gcc-15
Version: 15.2.0-3

I cannot build stable kernels (6.16.4 or 5) for amd64 anymore. I get a
lot errors like that:

...
vmlinux.o: error: objtool: .sframe+0x104a80: data relocation to !ENDBR:
time_and_date+0x0
vmlinux.o: error: objtool: .sframe+0x104a94: data relocation to !ENDBR:
range_string.isra.0+0x0
vmlinux.o: error: objtool: .sframe+0x104aa8: data relocation to !ENDBR:
mac_address_string+0x0
vmlinux.o: error: objtool: .sframe+0x104abc: data relocation to !ENDBR:
bdev_name.isra.0+0x0
vmlinux.o: error: objtool: .sframe+0x104ad0: data relocation to !ENDBR:
bdev_name.isra.0.cold+0x0
...

gcc-14 does not work either.

When 6.14.4 came out I could compile it, so I assume it's a newer
problem in gcc-15/14

Regards,
#1114556#10
Date:
2025-09-07 07:42:58 UTC
From:
To:
that will be reverted in the next upload. For now you can work around it
with


diff --git a/Makefile b/Makefile
--- a/Makefile
+++ b/Makefile
@@ -886,6 +886,8 @@ ifdef CONFIG_CC_IS_GCC
  KBUILD_CFLAGS	+= $(call cc-option,--param=allow-store-data-races=0)
  KBUILD_CFLAGS	+= $(call cc-option,-fno-allow-store-data-races)
  endif
+# No sframe generation for kernel if enabled by default
+KBUILD_CFLAGS	+= $(call cc-option,-Xassembler --gsframe=no)

  ifdef CONFIG_READABLE_ASM
  # Disable optimizations that make assembler listings hard to read.