makefile

# $Id: Makefile 9120 2006-08-28 13:01:07Z vlad $

PHONY += all kernel install_kernel install clean clean_kernel
	
all:
.PHONY: $(PHONY)

.DELETE_ON_ERROR:

include ./config.mk

export COMPAT_CONFIG=$(CWD)/compat.config
export COMPAT_AUTOCONF=$(CWD)/include/linux/compat_autoconf.h
export KLIB_BUILD
export KVERSION
export MAKE

-include $(COMPAT_CONFIG)
export CREL=$(shell cat $(CWD)/compat_version)
export CREL_PRE:=.compat_autoconf_
export CREL_CHECK:=$(CREL_PRE)$(CREL)
CFLAGS += \
	-DCOMPAT_BASE="\"$(shell cat compat_base)\"" \
	-DCOMPAT_BASE_TREE="\"$(shell cat compat_base_tree)\"" \
	-DCOMPAT_BASE_TREE_VERSION="\"$(shell cat compat_base_tree_version)\"" \
	-DCOMPAT_PROJECT="\"Compat-mlnx-ofed\"" \
	-DCOMPAT_VERSION="\"$(shell cat compat_version)\"" \

DEPMOD  = /sbin/depmod
INSTALL_MOD_DIR ?= $(shell test -f /etc/SuSE-release && echo updates || echo extra/mellanox-mlnx-en)

ifeq ($(CONFIG_MEMTRACK),m)
        export KERNEL_MEMTRACK_CFLAGS = -include $(CWD)/drivers/net/ethernet/mellanox/debug/mtrack.h
else
        export KERNEL_MEMTRACK_CFLAGS =
endif

# GCC earlier than 4.6.0 will build modules which require 'mcount',
# and this symbol will not be available in the kernel if the kernel was
# compiled with GCC 4.6.0 and above.
# therefore, to prevent unknown symbol issues we disable function tracing.
#
CC  = $(CROSS_COMPILE)gcc
CPP = $(CC) -E

# try-run
# Usage: option = $(call try-run, $(CC)...-o "$$TMP",option-ok,otherwise)
# Exit code chooses option. "$$TMP" is can be used as temporary file and
# is automatically cleaned up.
TMPOUT := /tmp/
try-run = $(shell set -e;				\
	TMP="$(TMPOUT).$$$$.tmp";		\
	TMPO="$(TMPOUT).$$$$.o";		\
	if ($(1)) >/dev/null 2>&1;		\
	then echo "$(2)";				\
	else echo "$(3)";				\
	fi;								\
	rm -f "$$TMP" "$$TMPO")

# cc-option
# Usage: cflags-y += $(call cc-option,-march=winchip-c6,-march=i586)
cc-option = $(call try-run,\
	$(CC) $(KBUILD_CPPFLAGS) $(KBUILD_CFLAGS) $(1) -c -x c /dev/null -o "$$TMP",$(1),$(2))

ifneq ($(call cc-option,-Werror=date-time),)
KCFLAGS += -Wno-date-time
export KCFLAGS
endif

CPP_MAJOR := $(shell $(CPP) -dumpversion 2>&1 | cut -d'.' -f1)
CPP_MINOR := $(shell $(CPP) -dumpversion 2>&1 | cut -d'.' -f2)
CPP_PATCH := $(shell $(CPP) -dumpversion 2>&1 | cut -d'.' -f3)
# Assumes that major, minor, and patch cannot exceed 999
CPP_VERS  := $(shell expr 0$(CPP_MAJOR) \* 1000000 + 0$(CPP_MINOR) \* 1000 + 0$(CPP_PATCH))
compile_h=$(shell /bin/ls -1 $(KSRC)/include/*/compile.h 2> /dev/null | head -1)
ifneq ($(compile_h),)
KERNEL_GCC_MAJOR := $(shell grep LINUX_COMPILER $(compile_h) | sed -r -e 's/.*gcc version ([0-9\.\-]*) .*/\1/g' | cut -d'.' -f1)
KERNEL_GCC_MINOR := $(shell grep LINUX_COMPILER $(compile_h) | sed -r -e 's/.*gcc version ([0-9\.\-]*) .*/\1/g' | cut -d'.' -f2)
KERNEL_GCC_PATCH := $(shell grep LINUX_COMPILER $(compile_h) | sed -r -e 's/.*gcc version ([0-9\.\-]*) .*/\1/g' | cut -d'.' -f3)
KERNEL_GCC_VER  := $(shell expr 0$(KERNEL_GCC_MAJOR) \* 1000000 + 0$(KERNEL_GCC_MINOR) \* 1000 + 0$(KERNEL_GCC_PATCH))
ifneq ($(shell if [ $(CPP_VERS) -lt 4006000 ] && [ $(KERNEL_GCC_VER) -ge 4006000 ]; then \
					echo "YES"; else echo ""; fi),)
$(info Warning: The kernel was compiled with GCC newer than 4.6.0, while the current GCC is older than 4.6.0, Disabling function tracing to prevent unknown symbol issues...)
override WITH_MAKE_PARAMS += CONFIG_FUNCTION_TRACER= CONFIG_HAVE_FENTRY=
endif
endif

ifneq ($(shell if (echo $(KVERSION) | grep -qE 'uek.*debug'); then \
					echo "YES"; else echo ""; fi),)
override WITH_MAKE_PARAMS += ctf-dir=$(CWD)/.ctf
endif

$(COMPAT_AUTOCONF): $(COMPAT_CONFIG)
	+@$(CWD)/ofed_scripts/gen-compat-autoconf.sh $(COMPAT_CONFIG) > $(COMPAT_AUTOCONF)

$(COMPAT_CONFIG):
	+@$(CWD)/ofed_scripts/gen-compat-config.sh > $(COMPAT_CONFIG)

all: kernel

install: install_kernel
install_kernel: install_modules

autoconf_h=$(shell /bin/ls -1 $(KSRC)/include/*/autoconf.h 2> /dev/null | head -1)
kconfig_h=$(shell /bin/ls -1 $(KSRC)/include/*/kconfig.h 2> /dev/null | head -1)

ifneq ($(kconfig_h),)
KCONFIG_H = -include $(kconfig_h)
endif

V ?= 0

#########################
#	make kernel	#
#########################
#NB: The LINUXINCLUDE value comes from main kernel Makefile
#    with local directories prepended. This eventually affects
#    CPPFLAGS in the kernel Makefile
kernel: $(COMPAT_CONFIG) $(COMPAT_AUTOCONF)
	@echo "Building kernel modules"
	@echo "Kernel version: $(KVERSION)"
	@echo "Modules directory: $(INSTALL_MOD_PATH)/lib/modules/$(KVERSION)/$(INSTALL_MOD_DIR)"
	@echo "Kernel sources: $(KSRC)"
	env CWD=$(CWD) BACKPORT_INCLUDES=$(BACKPORT_INCLUDES) \
		$(MAKE) -C $(KSRC) SUBDIRS="$(CWD)" \
		V=$(V) KBUILD_NOCMDDEP=1 $(WITH_MAKE_PARAMS) \
		CONFIG_COMPAT_VERSION=$(CONFIG_COMPAT_VERSION) \
		CONFIG_COMPAT_KOBJECT_BACKPORT=$(CONFIG_COMPAT_KOBJECT_BACKPORT) \
		CONFIG_MEMTRACK=$(CONFIG_MEMTRACK) \
		CONFIG_MLX4_CORE=$(CONFIG_MLX4_CORE) \
		CONFIG_MLX4_EN=$(CONFIG_MLX4_EN) \
		CONFIG_MLX4_EN_DCB=$(CONFIG_MLX4_EN_DCB) \
		CONFIG_MLX5_CORE=$(CONFIG_MLX5_CORE) \
		CONFIG_DTRACE= \
		LINUXINCLUDE=' \
		$(CFLAGS) \
		-include $(autoconf_h) \
		$(KCONFIG_H) \
		-include $(CWD)/include/linux/compat-2.6.h \
		$(BACKPORT_INCLUDES) \
		$(KERNEL_MEMTRACK_CFLAGS) \
		$(SYSTUNE_INCLUDE) \
		$(MLNX_EN_EXTRA_CFLAGS) \
		-I$(CWD)/include \
		$$(if $$(CONFIG_XEN),-D__XEN_INTERFACE_VERSION__=$$(CONFIG_XEN_INTERFACE_VERSION)) \
		$$(if $$(CONFIG_XEN),-I$$(srctree)/arch/x86/include/mach-xen) \
		-I$$(srctree)/arch/$$(SRCARCH)/include \
		-Iarch/$$(SRCARCH)/include/generated \
		-Iinclude \
		-I$$(srctree)/arch/$$(SRCARCH)/include/uapi \
		-Iarch/$$(SRCARCH)/include/generated/uapi \
		-I$$(srctree)/include \
		-I$$(srctree)/include/uapi \
		-Iinclude/generated/uapi \
		$$(if $$(KBUILD_SRC),-Iinclude2 -I$$(srctree)/include) \
		-I$$(srctree)/arch/$$(SRCARCH)/include \
		-Iarch/$$(SRCARCH)/include/generated \
		' \
		modules


#########################
#	Install kernel	#
#########################
install_modules:
	@echo "Installing kernel modules"

ifeq ($(shell /usr/bin/lsb_release -s -i 2>/dev/null | grep -qiE "debian|ubuntu" 2>/dev/null && echo YES || echo ''),)
	$(MAKE) -C $(KSRC) SUBDIRS="$(CWD)" \
		INSTALL_MOD_PATH=$(INSTALL_MOD_PATH) \
		INSTALL_MOD_DIR=$(INSTALL_MOD_DIR) \
		$(WITH_MAKE_PARAMS) modules_install;
else
	install -d $(INSTALL_MOD_PATH)/lib/modules/$(KVERSION)/updates/dkms/
	find $(CWD)/ -name "*.ko" -exec /bin/cp -f '{}' $(INSTALL_MOD_PATH)/lib/modules/$(KVERSION)/updates/dkms/ \;
endif

	if [ ! -n "$(INSTALL_MOD_PATH)" ]; then $(DEPMOD) $(KVERSION);fi;

clean: clean_kernel

clean_kernel:
	$(MAKE) -C $(KSRC) SUBDIRS="$(CWD)" $(WITH_MAKE_PARAMS) clean
	@/bin/rm -f $(clean-files)

clean-files := Module.symvers modules.order Module.markers compat/modules.order
clean-files += $(COMPAT_CONFIG) $(COMPAT_AUTOCONF)

help:
	@echo
	@echo kernel: 		        build kernel modules
	@echo all: 		        build kernel modules
	@echo
	@echo install_kernel:	        install kernel modules under $(INSTALL_MOD_PATH)/lib/modules/$(KVERSION)/$(INSTALL_MOD_DIR)
	@echo install:	        	run install_kernel
	@echo
	@echo clean:	        	delete kernel modules binaries
	@echo clean_kernel:	        delete kernel modules binaries
	@echo