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kbuild: make modpost processing configurable

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On request from Al Viro make modpost processing configurable.

KBUILD_MODPOST_WARN can be set to make modpost warn instead of
error out in case on unresolved symbols in final module link.

KBUILD_MODPOST_NOFINAL can be set to avoid the final and timeconsuming
.c file generation and link of .ko files. This is solely useful for
speeding up when doing compile checks with for example allmodconfig

Signed-off-by: Sam Ravnborg <sam@ravnborg.org>
This commit is contained in:
Sam Ravnborg 2006-10-01 11:35:24 +02:00
parent e94c5bde70
commit ea837f1c05
1 changed files with 8 additions and 3 deletions
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11
scripts/Makefile.modpost
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@ -32,6 +32,10 @@
# Step 4 is solely used to allow module versioning in external modules, # Step 4 is solely used to allow module versioning in external modules,
# where the CRC of each module is retrieved from the Module.symers file. # where the CRC of each module is retrieved from the Module.symers file.
# KBUILD_MODPOST_WARN can be set to avoid error out in case of undefined
# symbols in the final module linking stage
# KBUILD_MODPOST_NOFINAL can be set to skip the final link of modules.
# This is solely usefull to speed up test compiles
PHONY := _modpost PHONY := _modpost
_modpost: __modpost _modpost: __modpost
@ -46,7 +50,8 @@ modulesymfile := $(KBUILD_EXTMOD)/Module.symvers
__modules := $(sort $(shell grep -h '\.ko' /dev/null $(wildcard $(MODVERDIR)/*.mod))) __modules := $(sort $(shell grep -h '\.ko' /dev/null $(wildcard $(MODVERDIR)/*.mod)))
modules := $(patsubst %.o,%.ko, $(wildcard $(__modules:.ko=.o))) modules := $(patsubst %.o,%.ko, $(wildcard $(__modules:.ko=.o)))
_modpost: $(modules) # Stop after building .o files if NOFINAL is set. Makes compile tests quicker
_modpost: $(if $(KBUILD_MODPOST_NOFINAL), $(modules:.ko:.o),$(modules))
# Step 2), invoke modpost # Step 2), invoke modpost
@ -58,7 +63,7 @@ quiet_cmd_modpost = MODPOST $(words $(filter-out vmlinux FORCE, $^)) modules
$(if $(KBUILD_EXTMOD),-i,-o) $(kernelsymfile) \ $(if $(KBUILD_EXTMOD),-i,-o) $(kernelsymfile) \
$(if $(KBUILD_EXTMOD),-I $(modulesymfile)) \ $(if $(KBUILD_EXTMOD),-I $(modulesymfile)) \
$(if $(KBUILD_EXTMOD),-o $(modulesymfile)) \ $(if $(KBUILD_EXTMOD),-o $(modulesymfile)) \
$(if $(KBUILD_EXTMOD),-w) \ $(if $(KBUILD_EXTMOD)$(KBUILD_MODPOST_WARN),-w) \
$(wildcard vmlinux) $(filter-out FORCE,$^) $(wildcard vmlinux) $(filter-out FORCE,$^)
PHONY += __modpost PHONY += __modpost
@ -92,7 +97,7 @@ targets += $(modules:.ko=.mod.o)
# Step 6), final link of the modules # Step 6), final link of the modules
quiet_cmd_ld_ko_o = LD [M] $@ quiet_cmd_ld_ko_o = LD [M] $@
cmd_ld_ko_o = $(LD) $(LDFLAGS) $(LDFLAGS_MODULE) -o $@ \ cmd_ld_ko_o = $(LD) $(LDFLAGS) $(LDFLAGS_MODULE) -o $@ \
$(filter-out FORCE,$^) $(filter-out FORCE,$^)
$(modules): %.ko :%.o %.mod.o FORCE $(modules): %.ko :%.o %.mod.o FORCE