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# Copyright (c) SUSE LLC
# SPDX-License-Identifier: GPL-2.0-or-later
TOPDIR := .
CREATE_CONFIG := 1
include $(TOPDIR)/Makefile.inc
# "make" on some distros will fail on explicit '#' or '\#' in the program text below
__HASH__ := \#
# Check whether a given shell command succeeds
check_cmd = $(shell \
if $1; then \
found=1; \
status="yes"; \
else \
found=0; \
status="no"; \
fi; \
echo 1>&2 "Checking $(if $3,$3,command \"$1\") ... $$status"; \
echo "$$found" \
)
# Check whether a function with name $1 has been declared in header file $2.
check_func = $(shell \
if grep -Eq "^(extern[[:blank:]]+)?[^[:blank:]]+[[:blank:]]+$1[[:blank:]]*(.*)*" "$2"; then \
found=1; \
status="yes"; \
else \
found=0; \
status="no"; \
fi; \
echo 1>&2 "Checking for $1 in $2 ... $$status"; \
echo "$$found" \
)
# Checker whether a file with name $1 exists
check_file = $(shell \
if [ -f "$1" ]; then \
found=1; \
status="yes"; \
else \
found=0; \
status="no"; \
fi; \
echo 1>&2 "Checking if $1 exists ... $$status"; \
echo "$$found" \
)
# Check whether a file contains a variable with name $1 in header file $2
check_var = $(shell \
if grep -Eq "(^|[[:blank:]])$1([[:blank:]]|=|$$)" "$2"; then \
found=1; \
status="yes"; \
else \
found=0; \
status="no"; \
fi; \
echo 1>&2 "Checking for $1 in $2 ... $$status"; \
echo "$$found" \
)
# Test special behavior of gcc 4.8 with nested initializers
# gcc 4.8 compiles blacklist.c only with -Wno-missing-field-initializers
TEST_MISSING_INITIALIZERS = $(shell \
echo 'struct A {int a, b;}; struct B {struct A a; int b;} b = {.a.a=1};' | \
$(CC) -c -Werror -Wmissing-field-initializers -o /dev/null -xc - >/dev/null 2>&1 \
|| echo -Wno-missing-field-initializers)
# gcc 4.8.4 and certain versions of liburcu fail to compile this with -Werror=type-limits
TEST_URCU_TYPE_LIMITS = $(shell \
echo -e '$(__HASH__)include <urcu/uatomic.h>\nint main() { int z=8; return uatomic_sub_return(&z, 1); }' | \
$(CC) -c -Werror=type-limits -o /dev/null -xc - 2>/dev/null \
|| echo -Wno-type-limits )
URCU_VERSION = $(shell \
$(PKG_CONFIG) --modversion liburcu 2>/dev/null | \
awk -F. '{ printf("-DURCU_VERSION=0x%06x", 256 * ( 256 * $$1 + $$2) + $$3); }')
CMOCKA_VERSION = $(shell \
($(PKG_CONFIG) --modversion cmocka 2>/dev/null || echo "1.1.0" ) | \
awk -F. '{ printf("-DCMOCKA_VERSION=0x%06x", 256 * ( 256 * $$1 + $$2) + $$3); }')
DEFINES :=
ifneq ($(call check_func,dm_task_no_flush,$(devmapper_incdir)/libdevmapper.h),0)
DEFINES += LIBDM_API_FLUSH
endif
ifneq ($(call check_func,dm_task_get_errno,$(devmapper_incdir)/libdevmapper.h),0)
DEFINES += LIBDM_API_GET_ERRNO
endif
ifneq ($(call check_func,dm_task_set_cookie,$(devmapper_incdir)/libdevmapper.h),0)
DEFINES += LIBDM_API_COOKIE
endif
ifneq ($(call check_func,udev_monitor_set_receive_buffer_size,$(libudev_incdir)/libudev.h),0)
DEFINES += LIBUDEV_API_RECVBUF
endif
ifneq ($(call check_func,dm_task_deferred_remove,$(devmapper_incdir)/libdevmapper.h),0)
DEFINES += LIBDM_API_DEFERRED
endif
ifneq ($(call check_func,dm_hold_control_dev,$(devmapper_incdir)/libdevmapper.h),0)
DEFINES += LIBDM_API_HOLD_CONTROL
endif
ifneq ($(call check_var,ELS_DTAG_LNK_INTEGRITY,$(kernel_incdir)/scsi/fc/fc_els.h),0)
DEFINES += FPIN_EVENT_HANDLER
FPIN_SUPPORT = 1
endif
libmount_h := $(shell $(PKG_CONFIG) --variable=includedir mount)/libmount/libmount.h
ifneq ($(call check_func,mnt_unref_cache,$(libmount_h)),0)
DEFINES += LIBMOUNT_HAS_MNT_UNREF_CACHE
endif
ifneq ($(call check_func,mnt_table_parse_swaps,$(libmount_h)),0)
DEFINES += LIBMOUNT_SUPPORTS_SWAP
endif
ifneq ($(call check_file,$(kernel_incdir)/linux/nvme_ioctl.h),0)
ANA_SUPPORT := 1
endif
ENABLE_LIBDMMP := $(call check_cmd,$(PKG_CONFIG) --exists json-c)
ifeq ($(ENABLE_DMEVENTS_POLL),0)
DEFINES += -DNO_DMEVENTS_POLL
endif
SYSTEMD := $(strip $(or $(shell $(PKG_CONFIG) --modversion libsystemd 2>/dev/null | awk '{print $$1}'), \
$(shell systemctl --version 2>/dev/null | sed -n 's/systemd \([0-9]*\).*/\1/p')))
# $(call TEST_CC_OPTION,option,fallback)
# Test if the C compiler supports the option.
# Evaluates to "option" if yes, and "fallback" otherwise.
TEST_CC_OPTION = $(shell \
if echo 'int main(void){return 0;}' | \
$(CC) -o /dev/null -c -Werror "$(1)" -xc - >/dev/null 2>&1; \
then \
echo "$(1)"; \
else \
echo "$(2)"; \
fi)
# Check if _DFORTIFY_SOURCE=3 is supported.
# On some distros (e.g. Debian Buster) it will be falsely reported as supported
# but it doesn't seem to make a difference wrt the compilation result.
FORTIFY_OPT :=
# Check is you can compile with the urcu.h header, using the C99 standard.
# If urcu/config-<arch>.h defines CONFIG_RCU_USE_ATOMIC_BUILTINS, then anything
# including urcu.h must be compiled with at least the C11 standard. See:
# https://github.com/urcu/userspace-rcu/commit/89280d020bf064d1055c360fb9974f128051043f
C_STD := $(shell \
if printf '$(__HASH__)include <urcu.h>\nint main(void) { return 0; }\n' | $(CC) -o /dev/null -c -xc -std=gnu99 - 2>/dev/null; \
then \
echo "gnu99"; \
else \
echo "gnu11"; \
fi)
STACKPROT :=
all: $(TOPDIR)/config.mk
$(multipathdir)/autoconfig.h:
@echo creating $@
@echo '#ifndef AUTOCONFIG_H_INCLUDED' >$@
@echo '#define AUTOCONFIG_H_INCLUDED' >>$@
@for x in $(DEFINES); do echo "#define $$x" >>$@; done
@echo '#endif' >>$@
$(TOPDIR)/config.mk: $(multipathdir)/autoconfig.h
@echo creating $@
@echo "FPIN_SUPPORT := $(FPIN_SUPPORT)" >$@
@echo "FORTIFY_OPT := $(FORTIFY_OPT)" >>$@
@echo "D_URCU_VERSION := $(call URCU_VERSION)" >>$@
@echo "D_CMOCKA_VERSION := $(call CMOCKA_VERSION)" >>$@
@echo "SYSTEMD := $(SYSTEMD)" >>$@
@echo "ANA_SUPPORT := $(ANA_SUPPORT)" >>$@
@echo "STACKPROT := $(call TEST_CC_OPTION,-fstack-protector-strong,-fstack-protector)" >>$@
@echo "ERROR_DISCARDED_QUALIFIERS := $(call TEST_CC_OPTION,-Werror=discarded-qualifiers,)" >>$@
@echo "WNOCLOBBERED := $(call TEST_CC_OPTION,-Wno-clobbered -Wno-error=clobbered,)" >>$@
@echo "WFORMATOVERFLOW := $(call TEST_CC_OPTION,-Wformat-overflow=2,)" >>$@
@echo "WSTRINGOP_TRUNCATION := $(call TEST_CC_OPTION,-Wstringop-truncation)" >>$@
@echo "W_MISSING_INITIALIZERS := $(call TEST_MISSING_INITIALIZERS)" >>$@
@echo "W_URCU_TYPE_LIMITS := $(call TEST_URCU_TYPE_LIMITS)" >>$@
@echo "ENABLE_LIBDMMP := $(ENABLE_LIBDMMP)" >>$@
@echo "C_STD := $(C_STD)" >>$@
|
