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Subject[patch 2/5] autoparam: makefile
From: Domen Puncer <domen@coderock.org>


Build .kernel-parameters.o when vmlinux is (re)built.
Add target "kernelparams" which generates descriptions of parameters
in Documentation/kernel-parameters-gen.txt

Signed-off-by: Domen Puncer <domen@coderock.org>

Makefile | 24 +++++++++++++++++++++++-
1 files changed, 23 insertions(+), 1 deletion(-)

Index: a/Makefile
===================================================================
--- a.orig/Makefile
+++ a/Makefile
@@ -650,6 +650,7 @@ define rule_vmlinux__
/bin/false; \
fi;
$(verify_kallsyms)
+ $(extract_kernel_parameters)
endef


@@ -916,6 +917,15 @@ modules modules_install: FORCE

endif # CONFIG_MODULES

+# Extract kernel parameters
+# ---------------------------------------------------------------------------
+
+define extract_kernel_parameters
+ $(Q)$(OBJCOPY) -j __param_strings $(objtree)/vmlinux -O binary \
+ $(objtree)/.kernel-parameters.o
+ $(Q)$(OBJCOPY) -R __param_strings $(objtree)/vmlinux $(objtree)/vmlinux
+endef
+
# Generate asm-offsets.h
# ---------------------------------------------------------------------------

@@ -946,7 +956,8 @@ endef
# Directories & files removed with 'make clean'
CLEAN_DIRS += $(MODVERDIR)
CLEAN_FILES += vmlinux System.map \
- .tmp_kallsyms* .tmp_version .tmp_vmlinux* .tmp_System.map
+ .tmp_kallsyms* .tmp_version .tmp_vmlinux* .tmp_System.map \
+ .kernel-parameters.o

# Directories & files removed with 'make mrproper'
MRPROPER_DIRS += include/config include2
@@ -1048,6 +1059,8 @@ help:
@echo ''
@echo 'Documentation targets:'
@$(MAKE) -f $(srctree)/Documentation/DocBook/Makefile dochelp
+ @echo ' kernelparams - Generates list of boot parameters in'
+ @echo ' Documentation/kernel-parameters-gen.txt'
@echo ''
@echo 'Architecture specific targets ($(ARCH)):'
@$(if $(archhelp),$(archhelp),\
@@ -1142,6 +1155,15 @@ help:
@echo ''
endif # KBUILD_EXTMOD

+
+kernelparams:
+ $(Q)if [ ! -f $(objtree)/.kernel-parameters.o ]; then \
+ echo "You have to build a kernel (vmlinux) first."; \
+ exit 1; \
+ fi
+ $(O)$(PERL) -w $(srctree)/scripts/kernelparams.pl $(objtree)/.kernel-parameters.o \
+ > $(srctree)/Documentation/kernel-parameters-gen.txt
+
# Generate tags for editors
# ---------------------------------------------------------------------------

--
-
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