On 17/03/2021 06:46, Victor Erminpour wrote:
Calling cc-option will use KBUILD_CFLAGS, which when lazy setting subdir-ccflags-y produces the following build error:scripts/Makefile.lib:10: *** Recursive variable `KBUILD_CFLAGS' \ references itself (eventually). Stop. Use := assignment to subdir-ccflags-y when referencing cc-option. This causes make to also evaluate += immediately, cc-option calls are done right away and we don't end up with KBUILD_CFLAGS referencing itself.
Thanks for the patch. Reviewed-by: Anand Jain <anand.j...@oracle.com>
Signed-off-by: Victor Erminpour <victor.erminp...@oracle.com> --- fs/btrfs/Makefile | 8 ++++---- 1 file changed, 4 insertions(+), 4 deletions(-) diff --git a/fs/btrfs/Makefile b/fs/btrfs/Makefile index b634c42115ea..3dba1336fa95 100644 --- a/fs/btrfs/Makefile +++ b/fs/btrfs/Makefile @@ -7,10 +7,10 @@ subdir-ccflags-y += -Wmissing-format-attribute subdir-ccflags-y += -Wmissing-prototypes subdir-ccflags-y += -Wold-style-definition subdir-ccflags-y += -Wmissing-include-dirs -subdir-ccflags-y += $(call cc-option, -Wunused-but-set-variable) -subdir-ccflags-y += $(call cc-option, -Wunused-const-variable) -subdir-ccflags-y += $(call cc-option, -Wpacked-not-aligned) -subdir-ccflags-y += $(call cc-option, -Wstringop-truncation)
+subdir-ccflags-y := $(call cc-option, -Wunused-but-set-variable) +subdir-ccflags-y := $(call cc-option, -Wunused-const-variable) +subdir-ccflags-y := $(call cc-option, -Wpacked-not-aligned) +subdir-ccflags-y := $(call cc-option, -Wstringop-truncation)
# The following turn off the warnings enabled by -Wextra subdir-ccflags-y += -Wno-missing-field-initializers subdir-ccflags-y += -Wno-sign-compare
