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author | Linus Torvalds <torvalds@ppc970.osdl.org> | 2005-04-16 15:20:36 -0700 |
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committer | Linus Torvalds <torvalds@ppc970.osdl.org> | 2005-04-16 15:20:36 -0700 |
commit | 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 (patch) | |
tree | 0bba044c4ce775e45a88a51686b5d9f90697ea9d /scripts/Makefile.modpost | |
download | lwn-1da177e4c3f41524e886b7f1b8a0c1fc7321cac2.tar.gz lwn-1da177e4c3f41524e886b7f1b8a0c1fc7321cac2.zip |
Linux-2.6.12-rc2v2.6.12-rc2
Initial git repository build. I'm not bothering with the full history,
even though we have it. We can create a separate "historical" git
archive of that later if we want to, and in the meantime it's about
3.2GB when imported into git - space that would just make the early
git days unnecessarily complicated, when we don't have a lot of good
infrastructure for it.
Let it rip!
Diffstat (limited to 'scripts/Makefile.modpost')
-rw-r--r-- | scripts/Makefile.modpost | 110 |
1 files changed, 110 insertions, 0 deletions
diff --git a/scripts/Makefile.modpost b/scripts/Makefile.modpost new file mode 100644 index 000000000000..94b550e21be8 --- /dev/null +++ b/scripts/Makefile.modpost @@ -0,0 +1,110 @@ +# =========================================================================== +# Module versions +# =========================================================================== +# +# Stage one of module building created the following: +# a) The individual .o files used for the module +# b) A <module>.o file wich is the .o files above linked together +# c) A <module>.mod file in $(MODVERDIR)/, listing the name of the +# the preliminary <module>.o file, plus all .o files + +# Stage 2 is handled by this file and does the following +# 1) Find all modules from the files listed in $(MODVERDIR)/ +# 2) modpost is then used to +# 3) create one <module>.mod.c file pr. module +# 4) create one Module.symvers file with CRC for all exported symbols +# 5) compile all <module>.mod.c files +# 6) final link of the module to a <module.ko> file + +# Step 3 is used to place certain information in the module's ELF +# section, including information such as: +# Version magic (see include/vermagic.h for full details) +# - Kernel release +# - SMP is CONFIG_SMP +# - PREEMPT is CONFIG_PREEMPT +# - GCC Version +# Module info +# - Module version (MODULE_VERSION) +# - Module alias'es (MODULE_ALIAS) +# - Module license (MODULE_LICENSE) +# - See include/linux/module.h for more details + +# Step 4 is solely used to allow module versioning in external modules, +# where the CRC of each module is retreived from the Module.symers file. + +.PHONY: _modpost +_modpost: __modpost + +include .config +include scripts/Makefile.lib + +symverfile := $(objtree)/Module.symvers + +# Step 1), find all modules listed in $(MODVERDIR)/ +__modules := $(sort $(shell grep -h '\.ko' /dev/null $(wildcard $(MODVERDIR)/*.mod))) +modules := $(patsubst %.o,%.ko, $(wildcard $(__modules:.ko=.o))) + +_modpost: $(modules) + + +# Step 2), invoke modpost +# Includes step 3,4 +quiet_cmd_modpost = MODPOST + cmd_modpost = scripts/mod/modpost \ + $(if $(CONFIG_MODVERSIONS),-m) \ + $(if $(CONFIG_MODULE_SRCVERSION_ALL),-a,) \ + $(if $(KBUILD_EXTMOD),-i,-o) $(symverfile) \ + $(filter-out FORCE,$^) + +.PHONY: __modpost +__modpost: $(wildcard vmlinux) $(modules:.ko=.o) FORCE + $(call cmd,modpost) + +# Declare generated files as targets for modpost +$(symverfile): __modpost ; +$(modules:.ko=.mod.c): __modpost ; + + +# Step 5), compile all *.mod.c files + +# modname is set to make c_flags define KBUILD_MODNAME +modname = $(*F) + +quiet_cmd_cc_o_c = CC $@ + cmd_cc_o_c = $(CC) $(c_flags) $(CFLAGS_MODULE) \ + -c -o $@ $< + +$(modules:.ko=.mod.o): %.mod.o: %.mod.c FORCE + $(call if_changed_dep,cc_o_c) + +targets += $(modules:.ko=.mod.o) + +# Step 6), final link of the modules +quiet_cmd_ld_ko_o = LD [M] $@ + cmd_ld_ko_o = $(LD) $(LDFLAGS) $(LDFLAGS_MODULE) -o $@ \ + $(filter-out FORCE,$^) + +$(modules): %.ko :%.o %.mod.o FORCE + $(call if_changed,ld_ko_o) + +targets += $(modules) + + +# Add FORCE to the prequisites of a target to force it to be always rebuilt. +# --------------------------------------------------------------------------- + +.PHONY: FORCE + +FORCE: + +# Read all saved command lines and dependencies for the $(targets) we +# may be building above, using $(if_changed{,_dep}). As an +# optimization, we don't need to read them if the target does not +# exist, we will rebuild anyway in that case. + +targets := $(wildcard $(sort $(targets))) +cmd_files := $(wildcard $(foreach f,$(targets),$(dir $(f)).$(notdir $(f)).cmd)) + +ifneq ($(cmd_files),) + include $(cmd_files) +endif |