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 $(shell pwd)))
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
96export srctree OUTPUT CC LD CFLAGS V
97build := -f $(srctree)/tools/build/Makefile.build dir=. obj
98
99do_compile_shared_library =			\
100	($(print_shared_lib_compile)		\
101	$(CC) --shared $^ -o $@ -lpthread -ldl -Wl,-soname='"$@"';$(shell ln -s $@ liblockdep.so))
102
103do_build_static_lib =				\
104	($(print_static_lib_build)		\
105	$(RM) $@;  $(AR) rcs $@ $^)
106
107CMD_TARGETS = $(LIB_FILE)
108
109TARGETS = $(CMD_TARGETS)
110
111
112all: all_cmd
113
114all_cmd: $(CMD_TARGETS)
115
116$(LIB_IN): force
117	$(Q)$(MAKE) $(build)=liblockdep
118
119liblockdep.so.$(LIBLOCKDEP_VERSION): $(LIB_IN)
120	$(Q)$(do_compile_shared_library)
121
122liblockdep.a: $(LIB_IN)
123	$(Q)$(do_build_static_lib)
124
125tags:	force
126	$(RM) tags
127	find . -name '*.[ch]' | xargs ctags --extra=+f --c-kinds=+px \
128	--regex-c++='/_PE\(([^,)]*).*/PEVENT_ERRNO__\1/'
129
130TAGS:	force
131	$(RM) TAGS
132	find . -name '*.[ch]' | xargs etags \
133	--regex='/_PE(\([^,)]*\).*/PEVENT_ERRNO__\1/'
134
135define do_install
136	$(print_install)				\
137	if [ ! -d '$(DESTDIR_SQ)$2' ]; then		\
138		$(INSTALL) -d -m 755 '$(DESTDIR_SQ)$2';	\
139	fi;						\
140	$(INSTALL) $1 '$(DESTDIR_SQ)$2'
141endef
142
143install_lib: all_cmd
144	$(Q)$(call do_install,$(LIB_FILE),$(libdir_SQ))
145	$(Q)$(call do_install,$(BIN_FILE),$(bindir_SQ))
146
147install: install_lib
148
149clean:
150	$(RM) *.o *~ $(TARGETS) *.a *liblockdep*.so* $(VERSION_FILES) .*.d
151	$(RM) tags TAGS
152
153PHONY += force
154force:
155
156# Declare the contents of the .PHONY variable as phony.  We keep that
157# information in a variable so we can use it in if_changed and friends.
158.PHONY: $(PHONY)
159