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samples: add rule to dump current .config into a defconfig
... and one to restore it, of course. Reported-by: Thomas Petazzoni <thomas.petazzoni@free-electrons.com> Signed-off-by: "Yann E. MORIN" <yann.morin.1998@free.fr>
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@ -15,13 +15,14 @@ _ct_ng () {
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stop_steps=$(echo "${steps}" |sed -r -e 's/(^| )/+\1/;')
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actions='help menuconfig oldconfig saveconfig extractconfig
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defconfig olddefconfig
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build build. build-all build-all.
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wiki-samples list-samples list-samples-short list-steps
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show-tuple show-all show-config
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clean distclean updatetools
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tarball version'
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vars="RESTART= STOP= PREFIX= V="
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vars="RESTART= STOP= PREFIX= V= DEFCONFIG="
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ct_ng_opts="${samples} ${show_samples} ${build_samples}
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${steps} ${start_steps} ${stop_steps}
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@ -60,6 +60,47 @@ Samples can be later recalled by calling
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with the target tuple they represent.
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."
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.TP
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.B defconfig
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Save the current configuration to a mini-defconfig file, that contains only
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the strictly required symbols to reproduce the configuraiton. defconfig files
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are much smaller than a complete .config, so it is easy to send by mail. As
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only non-default symbols are present in a defconfig, it easy to spot the
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meaningfull values. Also, it is easy to use defconfig files with newer
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versions of
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.BR crosstool-NG .
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By default the mini-defconfig is saved to a file named
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.IR defconfig ,
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unless the variable
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.B $DEFCONFIG
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is set, in which case the mini-defconfig will be saved to the file referenced
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by
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.BR $DEFCONFIG .
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Note: only the
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.I .config
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file for
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.B crosstool-NG
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is saved. Config files for the components are
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.B not
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saved. Use
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.B saveconfig
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for that
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."
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.TP
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.B olddefconfig
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Configure
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.B crosstool-NG
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using a mini-defconfig file (previously saved with
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.B defconfig
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or manually edited). The default mini-defconfig is rad from the file
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.IR defconfig ,
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unless the vraiable
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.B $DEFCONFIG
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is set, inwhich case the mini-defconfig will be read from the file referenced
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by
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.B $DEFCONFIG
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."
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.TP
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.B build
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Builds the configured toolchain.
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."
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@ -5,7 +5,7 @@
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#-----------------------------------------------------------
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# The configurators rules
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configurators = menuconfig nconfig oldconfig
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configurators = menuconfig nconfig oldconfig defconfig olddefconfig
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PHONY += $(configurators)
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$(configurators): config_files
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@ -27,6 +27,14 @@ oldconfig: .config
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@$(ECHO) " CONF $(KCONFIG_TOP)"
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$(SILENT)$(CONF) --silent$@ $(KCONFIG_TOP)
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defconfig: .config
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@$(ECHO) ' GEN $@'
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$(SILENT)$(CONF) --savedefconfig=$${CONFIG-defconfig} $(KCONFIG_TOP)
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olddefconfig:
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@$(ECHO) ' CONF $@'
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$(SILENT)$(CONF) --defconfig=$${CONFIG-defconfig} $(KCONFIG_TOP)
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# Always be silent, the stdout an be >.config
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extractconfig:
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@$(awk) 'BEGIN { dump=0; } \
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@ -50,3 +58,6 @@ help-config::
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@echo ' oldconfig - Update current config using a provided .config as base'
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@echo ' extractconfig - Extract to stdout the configuration items from a'
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@echo ' build.log file piped to stdin'
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@echo ' defconfig - Save current config as a mini-defconfig to $${CONFIG}'
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@echo ' olddefconfig - Update config from a mini-defconfig $${CONFIG}'
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@echo ' (default: $${CONFIG}=./defconfig)'
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