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Make it easier to build scoutfs.ko

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We were duplicating the make args a few times so make a little ARGS
variable.

Default to the /lib/modules/$(uname -r) installed kernel source if
SK_KSRC isn't set.

And only try a sparse build that can fail if we can execute the sparse
command.

Signed-off-by: Zach Brown <zab@versity.com>
Reviewed-by: Mark Fasheh <mfasheh@versity.com>
This commit is contained in:
Zach Brown
2016-11-21 13:46:21 -08:00
parent 9fc47dedf8
commit 2591e54fdc
1 changed files with 16 additions and 30 deletions
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46
kmod/Makefile
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@@ -1,38 +1,24 @@
ALL: module
#
# SK_KSRC points to the kernel header build dir to build against.
# On a running machine this could be /lib/modules/$(uname -r)/build with
# the right kernel-headers package installed. I tend to build on other
# hosts so I extract the kernel-headers package for the target machine's
# kernel in a dir somehere.
#
# sparse is critical for avoiding endian mistakes. It should just work
# if the sparse package is installed.
#
# but sometimes kernel-headers are broken. For example, the
# rhel 3.10.0-327.el7.x86_64 kernel needs the following patch.
# We'll try to have a git tree with fixed headers.
#
#
# diff --git a/include/linux/rh_kabi.h b/include/linux/rh_kabi.h
# index 1767770..0a8e5f3 100644
# --- a/include/linux/rh_kabi.h
# +++ b/include/linux/rh_kabi.h
# @@ -73,7 +73,6 @@
# struct { \
# _orig; \
# } __UNIQUE_ID(rh_kabi_hide); \
# - __RH_KABI_CHECK_SIZE_ALIGN(_orig, _new); \
# }
#
# #define _RH_KABI_REPLACE_UNSAFE(_orig, _new) _new
# default to building against the installed source for the running kernel
ifeq ($(SK_KSRC),)
SK_KSRC := $(shell echo /lib/modules/`uname -r`/build)
endif
# fail if sparse fails if we find it
ifeq ($(shell sparse && echo found),found)
SP =
else
SP = @:
endif
ARGS := CONFIG_SCOUTFS_FS=m -C $(SK_KSRC) M=$(CURDIR)/src
all: module
module:
make CONFIG_SCOUTFS_FS=m -C $(SK_KSRC) M=$(CURDIR)/src
make C=2 CF="-D__CHECK_ENDIAN__" CONFIG_SCOUTFS_FS=m -C $(SK_KSRC) M=$(CURDIR)/src
make $(ARGS)
$(SP) make C=2 CF="-D__CHECK_ENDIAN__" $(ARGS)
clean:
make CONFIG_SCOUTFS_FS=m -C $(SK_KSRC) M=$(CURDIR)/src clean
make $(ARGS) clean