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The kbuild system takes advantage of an incorrect behavior in GNU make. Once this behavior is fixed, all files in the kernel rebuild every time, even if nothing has changed. This patch ensures kbuild works with both the incorrect and correct behaviors of GNU make. For more details on the incorrect behavior, see: http://lists.gnu.org/archive/html/bug-make/2006-03/msg00003.html Changes in this patch: - Keep all targets that are to be marked .PHONY in a variable, PHONY. - Add .PHONY: $(PHONY) to mark them properly. - Remove any $(PHONY) files from the $? list when determining whether targets are up-to-date or not. Signed-off-by: Paul Smith <psmith@gnu.org> Signed-off-by: Sam Ravnborg <sam@ravnborg.org>
255 lines
7.7 KiB
Makefile
255 lines
7.7 KiB
Makefile
# ===========================================================================
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# Kernel configuration targets
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# These targets are used from top-level makefile
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PHONY += oldconfig xconfig gconfig menuconfig config silentoldconfig update-po-config
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xconfig: $(obj)/qconf
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$< arch/$(ARCH)/Kconfig
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gconfig: $(obj)/gconf
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$< arch/$(ARCH)/Kconfig
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menuconfig: $(obj)/mconf
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$(Q)$(MAKE) $(build)=scripts/kconfig/lxdialog
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$< arch/$(ARCH)/Kconfig
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config: $(obj)/conf
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$< arch/$(ARCH)/Kconfig
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oldconfig: $(obj)/conf
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$< -o arch/$(ARCH)/Kconfig
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silentoldconfig: $(obj)/conf
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$< -s arch/$(ARCH)/Kconfig
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update-po-config: $(obj)/kxgettext
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xgettext --default-domain=linux \
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--add-comments --keyword=_ --keyword=N_ \
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--files-from=scripts/kconfig/POTFILES.in \
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--output scripts/kconfig/config.pot
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$(Q)ln -fs Kconfig_i386 arch/um/Kconfig_arch
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$(Q)for i in `ls arch/`; \
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do \
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scripts/kconfig/kxgettext arch/$$i/Kconfig \
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done
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$(Q)msgcat scripts/kconfig/config.pot \
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`find scripts/kconfig/ -type f -name linux_*.pot` \
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--output scripts/kconfig/linux_raw.pot
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$(Q)msguniq --sort-by-file scripts/kconfig/linux_raw.pot \
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--output scripts/kconfig/linux.pot
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$(Q)rm -f arch/um/Kconfig_arch
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$(Q)rm -f scripts/kconfig/linux_*.pot scripts/kconfig/config.pot
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PHONY += randconfig allyesconfig allnoconfig allmodconfig defconfig
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randconfig: $(obj)/conf
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$< -r arch/$(ARCH)/Kconfig
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allyesconfig: $(obj)/conf
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$< -y arch/$(ARCH)/Kconfig
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allnoconfig: $(obj)/conf
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$< -n arch/$(ARCH)/Kconfig
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allmodconfig: $(obj)/conf
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$< -m arch/$(ARCH)/Kconfig
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defconfig: $(obj)/conf
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ifeq ($(KBUILD_DEFCONFIG),)
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$< -d arch/$(ARCH)/Kconfig
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else
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@echo *** Default configuration is based on '$(KBUILD_DEFCONFIG)'
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$(Q)$< -D arch/$(ARCH)/configs/$(KBUILD_DEFCONFIG) arch/$(ARCH)/Kconfig
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endif
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%_defconfig: $(obj)/conf
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$(Q)$< -D arch/$(ARCH)/configs/$@ arch/$(ARCH)/Kconfig
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# Help text used by make help
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help:
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@echo ' config - Update current config utilising a line-oriented program'
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@echo ' menuconfig - Update current config utilising a menu based program'
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@echo ' xconfig - Update current config utilising a QT based front-end'
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@echo ' gconfig - Update current config utilising a GTK based front-end'
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@echo ' oldconfig - Update current config utilising a provided .config as base'
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@echo ' randconfig - New config with random answer to all options'
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@echo ' defconfig - New config with default answer to all options'
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@echo ' allmodconfig - New config selecting modules when possible'
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@echo ' allyesconfig - New config where all options are accepted with yes'
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@echo ' allnoconfig - New config where all options are answered with no'
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# ===========================================================================
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# Shared Makefile for the various kconfig executables:
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# conf: Used for defconfig, oldconfig and related targets
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# mconf: Used for the mconfig target.
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# Utilizes the lxdialog package
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# qconf: Used for the xconfig target
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# Based on QT which needs to be installed to compile it
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# gconf: Used for the gconfig target
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# Based on GTK which needs to be installed to compile it
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# object files used by all kconfig flavours
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hostprogs-y := conf mconf qconf gconf kxgettext
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conf-objs := conf.o zconf.tab.o
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mconf-objs := mconf.o zconf.tab.o
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kxgettext-objs := kxgettext.o zconf.tab.o
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ifeq ($(MAKECMDGOALS),xconfig)
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qconf-target := 1
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endif
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ifeq ($(MAKECMDGOALS),gconfig)
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gconf-target := 1
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endif
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ifeq ($(qconf-target),1)
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qconf-cxxobjs := qconf.o
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qconf-objs := kconfig_load.o zconf.tab.o
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endif
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ifeq ($(gconf-target),1)
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gconf-objs := gconf.o kconfig_load.o zconf.tab.o
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endif
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clean-files := lkc_defs.h qconf.moc .tmp_qtcheck \
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.tmp_gtkcheck zconf.tab.c lex.zconf.c zconf.hash.c
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subdir- += lxdialog
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# Needed for systems without gettext
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KBUILD_HAVE_NLS := $(shell \
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if echo "\#include <libintl.h>" | $(HOSTCC) $(HOSTCFLAGS) -E - > /dev/null 2>&1 ; \
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then echo yes ; \
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else echo no ; fi)
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ifeq ($(KBUILD_HAVE_NLS),no)
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HOSTCFLAGS += -DKBUILD_NO_NLS
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endif
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# generated files seem to need this to find local include files
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HOSTCFLAGS_lex.zconf.o := -I$(src)
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HOSTCFLAGS_zconf.tab.o := -I$(src)
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HOSTLOADLIBES_qconf = $(KC_QT_LIBS) -ldl
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HOSTCXXFLAGS_qconf.o = $(KC_QT_CFLAGS) -D LKC_DIRECT_LINK
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HOSTLOADLIBES_gconf = `pkg-config --libs gtk+-2.0 gmodule-2.0 libglade-2.0`
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HOSTCFLAGS_gconf.o = `pkg-config --cflags gtk+-2.0 gmodule-2.0 libglade-2.0` \
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-D LKC_DIRECT_LINK
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$(obj)/qconf.o: $(obj)/.tmp_qtcheck
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ifeq ($(qconf-target),1)
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$(obj)/.tmp_qtcheck: $(src)/Makefile
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-include $(obj)/.tmp_qtcheck
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# QT needs some extra effort...
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$(obj)/.tmp_qtcheck:
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@set -e; echo " CHECK qt"; dir=""; pkg=""; \
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pkg-config --exists qt 2> /dev/null && pkg=qt; \
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pkg-config --exists qt-mt 2> /dev/null && pkg=qt-mt; \
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if [ -n "$$pkg" ]; then \
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cflags="\$$(shell pkg-config $$pkg --cflags)"; \
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libs="\$$(shell pkg-config $$pkg --libs)"; \
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moc="\$$(shell pkg-config $$pkg --variable=prefix)/bin/moc"; \
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dir="$$(pkg-config $$pkg --variable=prefix)"; \
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else \
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for d in $$QTDIR /usr/share/qt* /usr/lib/qt*; do \
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if [ -f $$d/include/qconfig.h ]; then dir=$$d; break; fi; \
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done; \
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if [ -z "$$dir" ]; then \
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echo "*"; \
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echo "* Unable to find the QT installation. Please make sure that"; \
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echo "* the QT development package is correctly installed and"; \
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echo "* either install pkg-config or set the QTDIR environment"; \
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echo "* variable to the correct location."; \
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echo "*"; \
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false; \
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fi; \
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libpath=$$dir/lib; lib=qt; osdir=""; \
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$(HOSTCXX) -print-multi-os-directory > /dev/null 2>&1 && \
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osdir=x$$($(HOSTCXX) -print-multi-os-directory); \
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test -d $$libpath/$$osdir && libpath=$$libpath/$$osdir; \
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test -f $$libpath/libqt-mt.so && lib=qt-mt; \
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cflags="-I$$dir/include"; \
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libs="-L$$libpath -Wl,-rpath,$$libpath -l$$lib"; \
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moc="$$dir/bin/moc"; \
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fi; \
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if [ ! -x $$dir/bin/moc -a -x /usr/bin/moc ]; then \
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echo "*"; \
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echo "* Unable to find $$dir/bin/moc, using /usr/bin/moc instead."; \
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echo "*"; \
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moc="/usr/bin/moc"; \
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fi; \
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echo "KC_QT_CFLAGS=$$cflags" > $@; \
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echo "KC_QT_LIBS=$$libs" >> $@; \
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echo "KC_QT_MOC=$$moc" >> $@
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endif
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$(obj)/gconf.o: $(obj)/.tmp_gtkcheck
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ifeq ($(gconf-target),1)
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-include $(obj)/.tmp_gtkcheck
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# GTK needs some extra effort, too...
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$(obj)/.tmp_gtkcheck:
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@if `pkg-config --exists gtk+-2.0 gmodule-2.0 libglade-2.0`; then \
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if `pkg-config --atleast-version=2.0.0 gtk+-2.0`; then \
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touch $@; \
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else \
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echo "*"; \
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echo "* GTK+ is present but version >= 2.0.0 is required."; \
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echo "*"; \
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false; \
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fi \
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else \
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echo "*"; \
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echo "* Unable to find the GTK+ installation. Please make sure that"; \
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echo "* the GTK+ 2.0 development package is correctly installed..."; \
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echo "* You need gtk+-2.0, glib-2.0 and libglade-2.0."; \
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echo "*"; \
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false; \
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fi
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endif
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$(obj)/zconf.tab.o: $(obj)/lex.zconf.c $(obj)/zconf.hash.c
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$(obj)/kconfig_load.o: $(obj)/lkc_defs.h
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$(obj)/qconf.o: $(obj)/qconf.moc $(obj)/lkc_defs.h
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$(obj)/gconf.o: $(obj)/lkc_defs.h
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$(obj)/%.moc: $(src)/%.h
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$(KC_QT_MOC) -i $< -o $@
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$(obj)/lkc_defs.h: $(src)/lkc_proto.h
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sed < $< > $@ 's/P(\([^,]*\),.*/#define \1 (\*\1_p)/'
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###
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# The following requires flex/bison/gperf
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# By default we use the _shipped versions, uncomment the following line if
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# you are modifying the flex/bison src.
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# LKC_GENPARSER := 1
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ifdef LKC_GENPARSER
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$(obj)/zconf.tab.c: $(src)/zconf.y
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$(obj)/lex.zconf.c: $(src)/zconf.l
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$(obj)/zconf.hash.c: $(src)/zconf.gperf
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%.tab.c: %.y
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bison -l -b $* -p $(notdir $*) $<
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cp $@ $@_shipped
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lex.%.c: %.l
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flex -L -P$(notdir $*) -o$@ $<
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cp $@ $@_shipped
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%.hash.c: %.gperf
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gperf < $< > $@
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cp $@ $@_shipped
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endif
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