1# SPDX-License-Identifier: GPL-2.0
  2# file format version
  3FILE_VERSION = 1
  4
  5LIBLOCKDEP_VERSION=$(shell make --no-print-directory -sC ../../.. kernelversion)
  6
  7# Makefiles suck: This macro sets a default value of $(2) for the
  8# variable named by $(1), unless the variable has been set by
  9# environment or command line. This is necessary for CC and AR
 10# because make sets default values, so the simpler ?= approach
 11# won't work as expected.
 12define allow-override
 13  $(if $(or $(findstring environment,$(origin $(1))),\
 14            $(findstring command line,$(origin $(1)))),,\
 15    $(eval $(1) = $(2)))
 16endef
 17
 18# Allow setting CC and AR and LD, or setting CROSS_COMPILE as a prefix.
 19$(call allow-override,CC,$(CROSS_COMPILE)gcc)
 20$(call allow-override,AR,$(CROSS_COMPILE)ar)
 21$(call allow-override,LD,$(CROSS_COMPILE)ld)
 22
 23INSTALL = install
 24
 25# Use DESTDIR for installing into a different root directory.
 26# This is useful for building a package. The program will be
 27# installed in this directory as if it was the root directory.
 28# Then the build tool can move it later.
 29DESTDIR ?=
 30DESTDIR_SQ = '$(subst ','\'',$(DESTDIR))'
 31
 32prefix ?= /usr/local
 33libdir_relative = lib
 34libdir = $(prefix)/$(libdir_relative)
 35bindir_relative = bin
 36bindir = $(prefix)/$(bindir_relative)
 37
 38export DESTDIR DESTDIR_SQ INSTALL
 39
 40MAKEFLAGS += --no-print-directory
 41
 42include ../../scripts/Makefile.include
 43
 44# copy a bit from Linux kbuild
 45
 46ifeq ("$(origin V)", "command line")
 47  VERBOSE = $(V)
 48endif
 49ifndef VERBOSE
 50  VERBOSE = 0
 51endif
 52
 53ifeq ($(srctree),)
 54srctree := $(patsubst %/,%,$(dir $(CURDIR)))
 55srctree := $(patsubst %/,%,$(dir $(srctree)))
 56srctree := $(patsubst %/,%,$(dir $(srctree)))
 57#$(info Determined 'srctree' to be $(srctree))
 58endif
 59
 60# Shell quotes
 61libdir_SQ = $(subst ','\'',$(libdir))
 62bindir_SQ = $(subst ','\'',$(bindir))
 63
 64LIB_IN := $(OUTPUT)liblockdep-in.o
 65
 66BIN_FILE = lockdep
 67LIB_FILE = $(OUTPUT)liblockdep.a $(OUTPUT)liblockdep.so.$(LIBLOCKDEP_VERSION)
 68
 69CONFIG_INCLUDES =
 70CONFIG_LIBS	=
 71CONFIG_FLAGS	=
 72
 73OBJ		= $@
 74N		=
 75
 76export Q VERBOSE
 77
 78INCLUDES = -I. -I./uinclude -I./include -I../../include $(CONFIG_INCLUDES)
 79
 80# Set compile option CFLAGS if not set elsewhere
 81CFLAGS ?= -g -DCONFIG_LOCKDEP -DCONFIG_STACKTRACE -DCONFIG_PROVE_LOCKING -DBITS_PER_LONG=__WORDSIZE -DLIBLOCKDEP_VERSION='"$(LIBLOCKDEP_VERSION)"' -rdynamic -O0 -g
 82CFLAGS += -fPIC
 83CFLAGS += -Wall
 84
 85override CFLAGS += $(CONFIG_FLAGS) $(INCLUDES) $(PLUGIN_DIR_SQ)
 86
 87ifeq ($(VERBOSE),1)
 88  Q =
 89  print_shared_lib_compile =
 90  print_install =
 91else
 92  Q = @
 93  print_shared_lib_compile =	echo '  LD       '$(OBJ);
 94  print_static_lib_build =	echo '  LD       '$(OBJ);
 95  print_install =		echo '  INSTALL  '$1'	to	$(DESTDIR_SQ)$2';
 96endif
 97
 98all:
 99
100export srctree OUTPUT CC LD CFLAGS V
101include $(srctree)/tools/build/Makefile.include
102
103do_compile_shared_library =			\
104	($(print_shared_lib_compile)		\
105	$(CC) $(LDFLAGS) --shared $^ -o $@ -lpthread -ldl -Wl,-soname='$(@F)';$(shell ln -sf $(@F) $(@D)/liblockdep.so))
106
107do_build_static_lib =				\
108	($(print_static_lib_build)		\
109	$(RM) $@;  $(AR) rcs $@ $^)
110
111CMD_TARGETS = $(LIB_FILE)
112
113TARGETS = $(CMD_TARGETS)
114
115
116all: fixdep all_cmd
117
118all_cmd: $(CMD_TARGETS)
119
120$(LIB_IN): force
121	$(Q)$(MAKE) $(build)=liblockdep
122
123$(OUTPUT)liblockdep.so.$(LIBLOCKDEP_VERSION): $(LIB_IN)
124	$(Q)$(do_compile_shared_library)
125
126$(OUTPUT)liblockdep.a: $(LIB_IN)
127	$(Q)$(do_build_static_lib)
128
129tags:	force
130	$(RM) tags
131	find . -name '*.[ch]' | xargs ctags --extra=+f --c-kinds=+px \
132	--regex-c++='/_PE\(([^,)]*).*/TEP_ERRNO__\1/'
133
134TAGS:	force
135	$(RM) TAGS
136	find . -name '*.[ch]' | xargs etags \
137	--regex='/_PE(\([^,)]*\).*/TEP_ERRNO__\1/'
138
139define do_install
140	$(print_install)				\
141	if [ ! -d '$(DESTDIR_SQ)$2' ]; then		\
142		$(INSTALL) -d -m 755 '$(DESTDIR_SQ)$2';	\
143	fi;						\
144	$(INSTALL) $1 '$(DESTDIR_SQ)$2'
145endef
146
147install_lib: all_cmd
148	$(Q)$(call do_install,$(LIB_FILE),$(libdir_SQ))
149	$(Q)$(call do_install,$(BIN_FILE),$(bindir_SQ))
150
151install: install_lib
152
153clean:
154	$(RM) $(OUTPUT)*.o *~ $(TARGETS) $(OUTPUT)*.a $(OUTPUT)*liblockdep*.so* $(VERSION_FILES) $(OUTPUT).*.d $(OUTPUT).*.cmd
155	$(RM) tags TAGS
156
157PHONY += force
158force:
159
160# Declare the contents of the .PHONY variable as phony.  We keep that
161# information in a variable so we can use it in if_changed and friends.
162.PHONY: $(PHONY)