Contents of /alx-src/tags/kernel26-2.6.12-alx-r9/scripts/Makefile.modpost
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Wed Mar 4 11:03:09 2009 UTC (15 years, 6 months ago) by niro
File size: 3470 byte(s)
Wed Mar 4 11:03:09 2009 UTC (15 years, 6 months ago) by niro
File size: 3470 byte(s)
Tag kernel26-2.6.12-alx-r9
1 | # =========================================================================== |
2 | # Module versions |
3 | # =========================================================================== |
4 | # |
5 | # Stage one of module building created the following: |
6 | # a) The individual .o files used for the module |
7 | # b) A <module>.o file wich is the .o files above linked together |
8 | # c) A <module>.mod file in $(MODVERDIR)/, listing the name of the |
9 | # the preliminary <module>.o file, plus all .o files |
10 | |
11 | # Stage 2 is handled by this file and does the following |
12 | # 1) Find all modules from the files listed in $(MODVERDIR)/ |
13 | # 2) modpost is then used to |
14 | # 3) create one <module>.mod.c file pr. module |
15 | # 4) create one Module.symvers file with CRC for all exported symbols |
16 | # 5) compile all <module>.mod.c files |
17 | # 6) final link of the module to a <module.ko> file |
18 | |
19 | # Step 3 is used to place certain information in the module's ELF |
20 | # section, including information such as: |
21 | # Version magic (see include/vermagic.h for full details) |
22 | # - Kernel release |
23 | # - SMP is CONFIG_SMP |
24 | # - PREEMPT is CONFIG_PREEMPT |
25 | # - GCC Version |
26 | # Module info |
27 | # - Module version (MODULE_VERSION) |
28 | # - Module alias'es (MODULE_ALIAS) |
29 | # - Module license (MODULE_LICENSE) |
30 | # - See include/linux/module.h for more details |
31 | |
32 | # Step 4 is solely used to allow module versioning in external modules, |
33 | # where the CRC of each module is retreived from the Module.symers file. |
34 | |
35 | .PHONY: _modpost |
36 | _modpost: __modpost |
37 | |
38 | include .config |
39 | include scripts/Makefile.lib |
40 | |
41 | symverfile := $(objtree)/Module.symvers |
42 | |
43 | # Step 1), find all modules listed in $(MODVERDIR)/ |
44 | __modules := $(sort $(shell grep -h '\.ko' /dev/null $(wildcard $(MODVERDIR)/*.mod))) |
45 | modules := $(patsubst %.o,%.ko, $(wildcard $(__modules:.ko=.o))) |
46 | |
47 | _modpost: $(modules) |
48 | |
49 | |
50 | # Step 2), invoke modpost |
51 | # Includes step 3,4 |
52 | quiet_cmd_modpost = MODPOST |
53 | cmd_modpost = scripts/mod/modpost \ |
54 | $(if $(CONFIG_MODVERSIONS),-m) \ |
55 | $(if $(CONFIG_MODULE_SRCVERSION_ALL),-a,) \ |
56 | $(if $(KBUILD_EXTMOD),-i,-o) $(symverfile) \ |
57 | $(filter-out FORCE,$^) |
58 | |
59 | .PHONY: __modpost |
60 | __modpost: $(wildcard vmlinux) $(modules:.ko=.o) FORCE |
61 | $(call cmd,modpost) |
62 | |
63 | # Declare generated files as targets for modpost |
64 | $(symverfile): __modpost ; |
65 | $(modules:.ko=.mod.c): __modpost ; |
66 | |
67 | |
68 | # Step 5), compile all *.mod.c files |
69 | |
70 | # modname is set to make c_flags define KBUILD_MODNAME |
71 | modname = $(*F) |
72 | |
73 | quiet_cmd_cc_o_c = CC $@ |
74 | cmd_cc_o_c = $(CC) $(c_flags) $(CFLAGS_MODULE) \ |
75 | -c -o $@ $< |
76 | |
77 | $(modules:.ko=.mod.o): %.mod.o: %.mod.c FORCE |
78 | $(call if_changed_dep,cc_o_c) |
79 | |
80 | targets += $(modules:.ko=.mod.o) |
81 | |
82 | # Step 6), final link of the modules |
83 | quiet_cmd_ld_ko_o = LD [M] $@ |
84 | cmd_ld_ko_o = $(LD) $(LDFLAGS) $(LDFLAGS_MODULE) -o $@ \ |
85 | $(filter-out FORCE,$^) |
86 | |
87 | $(modules): %.ko :%.o %.mod.o FORCE |
88 | $(call if_changed,ld_ko_o) |
89 | |
90 | targets += $(modules) |
91 | |
92 | |
93 | # Add FORCE to the prequisites of a target to force it to be always rebuilt. |
94 | # --------------------------------------------------------------------------- |
95 | |
96 | .PHONY: FORCE |
97 | |
98 | FORCE: |
99 | |
100 | # Read all saved command lines and dependencies for the $(targets) we |
101 | # may be building above, using $(if_changed{,_dep}). As an |
102 | # optimization, we don't need to read them if the target does not |
103 | # exist, we will rebuild anyway in that case. |
104 | |
105 | targets := $(wildcard $(sort $(targets))) |
106 | cmd_files := $(wildcard $(foreach f,$(targets),$(dir $(f)).$(notdir $(f)).cmd)) |
107 | |
108 | ifneq ($(cmd_files),) |
109 | include $(cmd_files) |
110 | endif |