Makefile: generate a Makefile wrapper in $(O)
If building out-of-tree, add a Makefile wrapper that calls-out to the real Makefile with proper args. Avoids having to pass -C and O= every time we call make. This is highly inspired from how the Linux kernel does it, and portions of it have been used. We can't use exactly the same implementation as the kernel does, because: - the script writing the wrapper has been expunged of the few lines that were too kernel-related: in buildroot we do not need the version string in the wrapper, and we do not have a patchlevel version; - "in-tree build" does not have the same meaning for the kernel and for buildroot: for the kernel, $(O) point to the $(TOPDIR), while for buildroot $(O) points to $(TOPDIR)/output. For more complete explanations, see: http://lists.busybox.net/pipermail/buildroot/2010-September/037815.html [Peter: minor tweaks] Signed-off-by: "Yann E. MORIN" <yann.morin.1998 at anciens.enib.fr> Signed-off-by: Peter Korsgaard <jacmet@sunsite.dk>
This commit is contained in:
Yann E. MORIN
Peter Korsgaard
parent
0f9da87c1d
commit
aefad5317f
3
CHANGES
3
CHANGES
@ -15,6 +15,9 @@
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Download handling reworked and support for git/svn downloads
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added.
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A convenience Makefile wrapper is created when using
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out-of-tree building, similar to how it is done for the kernel.
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New packages: xz
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Updated/fixed packages: alsa-lib, at, avahi, axel, berkeleydb,
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45
Makefile
45
Makefile
@ -45,6 +45,7 @@ space:=$(empty) $(empty)
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ifneq ("$(origin O)", "command line")
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O:=output
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CONFIG_DIR:=$(TOPDIR)
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NEED_WRAPPER=
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else
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# other packages might also support Linux-style out of tree builds
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# with the O=<dir> syntax (E.G. Busybox does). As make automatically
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@ -60,6 +61,7 @@ override O:=$(O)
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CONFIG_DIR:=$(O)
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# we need to pass O= everywhere we call back into the toplevel makefile
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EXTRAMAKEARGS = O=$(O)
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NEED_WRAPPER=y
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endif
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# $(shell find . -name *_defconfig |sed 's/.*\///')
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@ -324,7 +326,7 @@ prepare: $(BUILD_DIR)/buildroot-config/auto.conf
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world: prepare dependencies dirs $(BASE_TARGETS) $(TARGETS_ALL)
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.PHONY: all world dirs clean distclean source \
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.PHONY: all world dirs clean distclean source outputmakefile \
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$(BASE_TARGETS) $(TARGETS) $(TARGETS_ALL) \
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$(TARGETS_CLEAN) $(TARGETS_DIRCLEAN) $(TARGETS_SOURCE) \
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$(DL_DIR) $(TOOLCHAIN_DIR) $(BUILD_DIR) $(STAGING_DIR) $(TARGET_DIR) \
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@ -463,52 +465,52 @@ COMMON_CONFIG_ENV = \
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KCONFIG_TRISTATE=$(BUILD_DIR)/buildroot-config/tristate.config \
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BUILDROOT_CONFIG=$(CONFIG_DIR)/.config
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xconfig: $(BUILD_DIR)/buildroot-config/qconf
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xconfig: $(BUILD_DIR)/buildroot-config/qconf outputmakefile
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@mkdir -p $(BUILD_DIR)/buildroot-config
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@if ! $(COMMON_CONFIG_ENV) $< $(CONFIG_CONFIG_IN); then \
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test -f $(CONFIG_DIR)/.config.cmd || rm -f $(CONFIG_DIR)/.config; \
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fi
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gconfig: $(BUILD_DIR)/buildroot-config/gconf
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gconfig: $(BUILD_DIR)/buildroot-config/gconf outputmakefile
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@mkdir -p $(BUILD_DIR)/buildroot-config
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@if ! $(COMMON_CONFIG_ENV) srctree=$(TOPDIR) \
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$< $(CONFIG_CONFIG_IN); then \
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test -f $(CONFIG_DIR)/.config.cmd || rm -f $(CONFIG_DIR)/.config; \
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fi
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menuconfig: $(BUILD_DIR)/buildroot-config/mconf
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menuconfig: $(BUILD_DIR)/buildroot-config/mconf outputmakefile
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@mkdir -p $(BUILD_DIR)/buildroot-config
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@if ! $(COMMON_CONFIG_ENV) $< $(CONFIG_CONFIG_IN); then \
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test -f $(CONFIG_DIR)/.config.cmd || rm -f $(CONFIG_DIR)/.config; \
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fi
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nconfig: $(BUILD_DIR)/buildroot-config/nconf
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nconfig: $(BUILD_DIR)/buildroot-config/nconf outputmakefile
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@mkdir -p $(BUILD_DIR)/buildroot-config
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@if ! $(COMMON_CONFIG_ENV) $< $(CONFIG_CONFIG_IN); then \
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test -f $(CONFIG_DIR)/.config.cmd || rm -f $(CONFIG_DIR)/.config; \
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fi
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config: $(BUILD_DIR)/buildroot-config/conf
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config: $(BUILD_DIR)/buildroot-config/conf outputmakefile
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@mkdir -p $(BUILD_DIR)/buildroot-config
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@$(COMMON_CONFIG_ENV) $< $(CONFIG_CONFIG_IN)
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oldconfig: $(BUILD_DIR)/buildroot-config/conf
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oldconfig: $(BUILD_DIR)/buildroot-config/conf outputmakefile
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mkdir -p $(BUILD_DIR)/buildroot-config
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@$(COMMON_CONFIG_ENV) $< --oldconfig $(CONFIG_CONFIG_IN)
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randconfig: $(BUILD_DIR)/buildroot-config/conf
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randconfig: $(BUILD_DIR)/buildroot-config/conf outputmakefile
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@mkdir -p $(BUILD_DIR)/buildroot-config
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@$(COMMON_CONFIG_ENV) $< --randconfig $(CONFIG_CONFIG_IN)
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allyesconfig: $(BUILD_DIR)/buildroot-config/conf
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allyesconfig: $(BUILD_DIR)/buildroot-config/conf outputmakefile
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@mkdir -p $(BUILD_DIR)/buildroot-config
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@$(COMMON_CONFIG_ENV) $< --allyesconfig $(CONFIG_CONFIG_IN)
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allnoconfig: $(BUILD_DIR)/buildroot-config/conf
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allnoconfig: $(BUILD_DIR)/buildroot-config/conf outputmakefile
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@mkdir -p $(BUILD_DIR)/buildroot-config
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@$(COMMON_CONFIG_ENV) $< --allnoconfig $(CONFIG_CONFIG_IN)
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randpackageconfig: $(BUILD_DIR)/buildroot-config/conf
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randpackageconfig: $(BUILD_DIR)/buildroot-config/conf outputmakefile
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@mkdir -p $(BUILD_DIR)/buildroot-config
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@grep -v BR2_PACKAGE_ $(CONFIG_DIR)/.config > $(CONFIG_DIR)/.config.nopkg
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@$(COMMON_CONFIG_ENV) \
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@ -516,7 +518,7 @@ randpackageconfig: $(BUILD_DIR)/buildroot-config/conf
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$< --randconfig $(CONFIG_CONFIG_IN)
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@rm -f $(CONFIG_DIR)/.config.nopkg
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allyespackageconfig: $(BUILD_DIR)/buildroot-config/conf
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allyespackageconfig: $(BUILD_DIR)/buildroot-config/conf outputmakefile
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@mkdir -p $(BUILD_DIR)/buildroot-config
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@grep -v BR2_PACKAGE_ $(CONFIG_DIR)/.config > $(CONFIG_DIR)/.config.nopkg
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@$(COMMON_CONFIG_ENV) \
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@ -524,7 +526,7 @@ allyespackageconfig: $(BUILD_DIR)/buildroot-config/conf
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$< --allyesconfig $(CONFIG_CONFIG_IN)
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@rm -f $(CONFIG_DIR)/.config.nopkg
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allnopackageconfig: $(BUILD_DIR)/buildroot-config/conf
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allnopackageconfig: $(BUILD_DIR)/buildroot-config/conf outputmakefile
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@mkdir -p $(BUILD_DIR)/buildroot-config
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@grep -v BR2_PACKAGE_ $(CONFIG_DIR)/.config > $(CONFIG_DIR)/.config.nopkg
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@$(COMMON_CONFIG_ENV) \
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@ -532,19 +534,19 @@ allnopackageconfig: $(BUILD_DIR)/buildroot-config/conf
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$< --allnoconfig $(CONFIG_CONFIG_IN)
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@rm -f $(CONFIG_DIR)/.config.nopkg
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silentoldconfig: $(BUILD_DIR)/buildroot-config/conf
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silentoldconfig: $(BUILD_DIR)/buildroot-config/conf outputmakefile
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@mkdir -p $(BUILD_DIR)/buildroot-config
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$(COMMON_CONFIG_ENV) $< --silentoldconfig $(CONFIG_CONFIG_IN)
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defconfig: $(BUILD_DIR)/buildroot-config/conf
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defconfig: $(BUILD_DIR)/buildroot-config/conf outputmakefile
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@mkdir -p $(BUILD_DIR)/buildroot-config
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@$(COMMON_CONFIG_ENV) $< --defconfig $(CONFIG_CONFIG_IN)
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%_defconfig: $(BUILD_DIR)/buildroot-config/conf $(TOPDIR)/configs/%_defconfig
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%_defconfig: $(BUILD_DIR)/buildroot-config/conf $(TOPDIR)/configs/%_defconfig outputmakefile
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@mkdir -p $(BUILD_DIR)/buildroot-config
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@$(COMMON_CONFIG_ENV) $< --defconfig=$(TOPDIR)/configs/$@ $(CONFIG_CONFIG_IN)
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savedefconfig: $(BUILD_DIR)/buildroot-config/conf
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savedefconfig: $(BUILD_DIR)/buildroot-config/conf outputmakefile
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@mkdir -p $(BUILD_DIR)/buildroot-config
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@$(COMMON_CONFIG_ENV) $< --savedefconfig=$(TOPDIR)/defconfig $(CONFIG_CONFIG_IN)
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@ -559,6 +561,15 @@ endif # ifeq ($(BR2_HAVE_DOT_CONFIG),y)
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# Cleanup and misc junk
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#
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#############################################################
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# outputmakefile generates a Makefile in the output directory, if using a
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# separate output directory. This allows convenient use of make in the
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# output directory.
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outputmakefile:
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ifeq ($(NEED_WRAPPER),y)
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$(Q)$(TOPDIR)/scripts/mkmakefile $(TOPDIR) $(O)
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endif
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clean:
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rm -rf $(STAGING_DIR) $(TARGET_DIR) $(BINARIES_DIR) $(HOST_DIR) \
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$(STAMP_DIR) $(BUILD_DIR) $(TOOLCHAIN_DIR)
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47
scripts/mkmakefile
Executable file
47
scripts/mkmakefile
Executable file
@ -0,0 +1,47 @@
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#!/bin/sh
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# Generates a small Makefile used in the root of the output
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# directory, to allow make to be started from there.
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# The Makefile also allow for more convinient build of external modules
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# Usage
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# $1 - Kernel src directory
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# $2 - Output directory
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test ! -r $2/Makefile -o -O $2/Makefile || exit 0
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# Only overwrite automatically generated Makefiles
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# (so we do not overwrite buildroot Makefile)
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if test -e $2/Makefile && ! grep -q Automatically $2/Makefile
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then
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exit 0
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fi
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if [ "${quiet}" != "silent_" ]; then
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echo " GEN $2/Makefile"
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fi
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cat << EOF > $2/Makefile
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# Automatically generated by $0: don't edit
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lastword = \$(word \$(words \$(1)),\$(1))
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makedir := \$(dir \$(call lastword,\$(MAKEFILE_LIST)))
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MAKEARGS := -C $1
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MAKEARGS += O=\$(if \$(patsubst /%,,\$(makedir)),\$(CURDIR)/)\$(patsubst %/,%,\$(makedir))
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MAKEFLAGS += --no-print-directory
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.PHONY: all \$(MAKECMDGOALS)
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all := \$(filter-out all Makefile,\$(MAKECMDGOALS))
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all:
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\$(MAKE) \$(MAKEARGS) \$(all)
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Makefile:;
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\$(all): all
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@:
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%/: all
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@:
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EOF
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