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