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mips: Add -std= flag specified in KBUILD_CFLAGS to vdso CFLAGS

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commit 0f4ae7c6ecb89bfda026d210dcf8216fb67d2333 upstream.

GCC 15 changed the default C standard dialect from gnu17 to gnu23,
which should not have impacted the kernel because it explicitly requests
the gnu11 standard in the main Makefile. However, mips/vdso code uses
its own CFLAGS without a '-std=' value, which break with this dialect
change because of the kernel's own definitions of bool, false, and true
conflicting with the C23 reserved keywords.

  include/linux/stddef.h:11:9: error: cannot use keyword 'false' as enumeration constant
     11 |         false   = 0,
        |         ^~~~~
  include/linux/stddef.h:11:9: note: 'false' is a keyword with '-std=c23' onwards
  include/linux/types.h:35:33: error: 'bool' cannot be defined via 'typedef'
     35 | typedef _Bool                   bool;
        |                                 ^~~~
  include/linux/types.h:35:33: note: 'bool' is a keyword with '-std=c23' onwards

Add -std as specified in KBUILD_CFLAGS to the decompressor and purgatory
CFLAGS to eliminate these errors and make the C standard version of these
areas match the rest of the kernel.

Signed-off-by: Khem Raj <raj.khem@gmail.com>
Cc: stable@vger.kernel.org
Signed-off-by: Thomas Bogendoerfer <tsbogend@alpha.franken.de>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Khem Raj
2025-03-29 08:39:03 -07:00
committed by Greg Kroah-Hartman
parent dfa9ef978d
commit 231f6a1de1
1 changed files with 1 additions and 0 deletions
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arch/mips/vdso/Makefile
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@@ -30,6 +30,7 @@ endif
# offsets. # offsets.
cflags-vdso := $(ccflags-vdso) \ cflags-vdso := $(ccflags-vdso) \
$(filter -W%,$(filter-out -Wa$(comma)%,$(KBUILD_CFLAGS))) \ $(filter -W%,$(filter-out -Wa$(comma)%,$(KBUILD_CFLAGS))) \
$(filter -std=%,$(KBUILD_CFLAGS)) \
-O3 -g -fPIC -fno-strict-aliasing -fno-common -fno-builtin -G 0 \ -O3 -g -fPIC -fno-strict-aliasing -fno-common -fno-builtin -G 0 \
-mrelax-pic-calls $(call cc-option, -mexplicit-relocs) \ -mrelax-pic-calls $(call cc-option, -mexplicit-relocs) \
-fno-stack-protector -fno-jump-tables -DDISABLE_BRANCH_PROFILING \ -fno-stack-protector -fno-jump-tables -DDISABLE_BRANCH_PROFILING \