#
# We try to detect the specific api incompatibilities with simple tests
# because distros regularly backport features without changing the
# version.
#

ccflags-y += -include $(src)/kernelcompat.h

#
# v3.10-rc6-21-gbb6f619b3a49
#
# _readdir changes from fop->readdir() to fop->iterate() and from
# filldir(dirent) to dir_emit(ctx).
#
ifneq (,$(shell grep 'iterate.*dir_context' include/linux/fs.h))
ccflags-y += -DKC_ITERATE_DIR_CONTEXT
endif

#
# v3.10-rc6-23-g5f99f4e79abc
#
# Helpers including dir_emit_dots() are added in the process of
# switching dcache_readdir() from fop->readdir() to fop->iterate()
#
ifneq (,$(shell grep 'dir_emit_dots' include/linux/fs.h))
ccflags-y += -DKC_DIR_EMIT_DOTS
endif

#
# RHEL extended the fop struct so to use it we have to set
# a flag to indicate that the struct is large enough and
# contains the pointer.
#
ifneq (,$(shell grep 'FMODE_KABI_ITERATE' include/linux/fs.h))
ccflags-y += -DKC_FMODE_KABI_ITERATE
endif