diff options
Diffstat (limited to 'target/linux/generic/backport-5.10/005-v5.17-03-Kbuild-use-std-gnu11-for-KBUILD_USERCFLAGS.patch')
| -rw-r--r-- | target/linux/generic/backport-5.10/005-v5.17-03-Kbuild-use-std-gnu11-for-KBUILD_USERCFLAGS.patch | 42 |
1 files changed, 42 insertions, 0 deletions
diff --git a/target/linux/generic/backport-5.10/005-v5.17-03-Kbuild-use-std-gnu11-for-KBUILD_USERCFLAGS.patch b/target/linux/generic/backport-5.10/005-v5.17-03-Kbuild-use-std-gnu11-for-KBUILD_USERCFLAGS.patch new file mode 100644 index 0000000000..34b5b653ae --- /dev/null +++ b/target/linux/generic/backport-5.10/005-v5.17-03-Kbuild-use-std-gnu11-for-KBUILD_USERCFLAGS.patch @@ -0,0 +1,42 @@ +From 40337d6f3d677aee7ad3052ae662d3f53dd4d5cb Mon Sep 17 00:00:00 2001 +From: Arnd Bergmann <arnd@arndb.de> +Date: Tue, 8 Mar 2022 22:56:15 +0100 +Subject: [PATCH 3/3] Kbuild: use -std=gnu11 for KBUILD_USERCFLAGS + +As we change the C language standard for the kernel from gnu89 to +gnu11, it makes sense to also update the version for user space +compilation. + +Some users have older native compilers than what they use for +kernel builds, so I considered using gnu99 as the default version +for wider compatibility with gcc-4.6 and earlier. + +However, testing with older compilers showed that we already require +HOSTCC version 5.1 as well because a lot of host tools include +linux/compiler.h that uses __has_attribute(): + + CC tools/objtool/exec-cmd.o +In file included from tools/include/linux/compiler_types.h:36:0, + from tools/include/linux/compiler.h:5, + from exec-cmd.c:2: +tools/include/linux/compiler-gcc.h:19:5: error: "__has_attribute" is not defined [-Werror=undef] + +Signed-off-by: Arnd Bergmann <arnd@arndb.de> +Reviewed-by: Nathan Chancellor <nathan@kernel.org> +Reviewed-by: Nick Desaulniers <ndesaulniers@google.com> +Tested-by: Sedat Dilek <sedat.dilek@gmail.com> +Signed-off-by: Masahiro Yamada <masahiroy@kernel.org> +--- + Makefile | 2 +- + 1 file changed, 1 insertion(+), 1 deletion(-) + +--- a/Makefile ++++ b/Makefile +@@ -416,7 +416,7 @@ HOSTCXX = g++ + endif + + export KBUILD_USERCFLAGS := -Wall -Wmissing-prototypes -Wstrict-prototypes \ +- -O2 -fomit-frame-pointer -std=gnu89 \ ++ -O2 -fomit-frame-pointer -std=gnu11 \ + -Wdeclaration-after-statement + export KBUILD_USERLDFLAGS := |