mirror of
https://github.com/xen-project/xen.git
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Jan Beulich
7793d19bac
As of commit d155e4aef3 ("xen: Allow EXPERT mode to be selected from
the menuconfig directly") EXPERT is a regular config option (which the
shim default config also enables).
Signed-off-by: Jan Beulich <jbeulich@suse.com>
Acked-by: Roger Pau Monné <rogerpau@citrix.com>
89 lines
3.0 KiB
Makefile
89 lines
3.0 KiB
Makefile
XEN_ROOT = $(CURDIR)/../../..
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all: xen-shim
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.PHONY: FORCE
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FORCE:
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D=xen-root
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# Minimun set of files / directories go get Xen to build
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LINK_DIRS=config xen
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LINK_FILES=Config.mk
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DEP_DIRS=$(foreach i, $(LINK_DIRS), $(XEN_ROOT)/$(i))
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DEP_FILES=$(foreach i, $(LINK_FILES), $(XEN_ROOT)/$(i))
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# Exclude some intermediate files and final build products
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LINK_EXCLUDES := '*.[isoa]' '*.bin' '*.chk' '*.lnk' '*.gz' '.*'
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LINK_EXCLUDES += lexer.lex.? parser.tab.? conf
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LINK_EXCLUDES += asm-offsets.h asm-macros.h compile.h '*-autogen.h'
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LINK_EXCLUDES += mkelf32 mkreloc symbols config_data.S xen.lds efi.lds
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LINK_EXCLUDES += '*.map' xen xen.gz xen.efi xen-syms check.efi
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# To exclude full subtrees or individual files of not sufficiently specific
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# names, regular expressions are used:
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LINK_EXCLUDE_PATHS := xen/include/compat/.*
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LINK_EXCLUDE_PATHS += xen/include/config/.*
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LINK_EXCLUDE_PATHS += xen/include/generated/.*
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LINK_EXCLUDE_PATHS += xen/arch/x86/boot/reloc[.]S
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LINK_EXCLUDE_PATHS += xen/arch/x86/boot/cmdline[.]S
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# This is all a giant mess and doesn't really work.
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#
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# The correct solution is to fix Xen to be able to do out-of-tree builds.
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#
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# Until that happens, we set up a linkfarm by iterating over the xen/ tree,
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# linking source files. This is repeated each time we enter this directory,
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# which poses a problem for a two-step "make; make install" build process.
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#
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# Any time the list of files to link changes, we relink all files, then
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# distclean to take out not-easy-to-classify intermediate files. This is to
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# support easy development of the shim, but has a side effect of clobbering
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# the already-built shim.
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#
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# $(LINK_EXCLUDES) and $(LINK_EXCLUDE_DIRS) should be set such that a parallel
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# build of shim and xen/ doesn't cause a subsequent `make install` to decide to
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# regenerate the linkfarm. This means that all intermediate and final build
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# artefacts must be excluded.
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linkfarm.stamp: $(DEP_DIRS) $(DEP_FILES) FORCE
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mkdir -p $(D)
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rm -f linkfarm.stamp.tmp
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set -e; \
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$(foreach d, $(LINK_DIRS), \
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(mkdir -p $(D)/$(d); \
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cd $(D)/$(d); \
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find $(XEN_ROOT)/$(d)/ -type d |\
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sed 's,^$(XEN_ROOT)/$(d)/,,g' | xargs mkdir -p .);) \
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$(foreach d, $(LINK_DIRS), \
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(cd $(XEN_ROOT); \
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find $(d) ! -type l -type f $(addprefix ! -name ,$(LINK_EXCLUDES)) \
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| grep -v $(patsubst %,-e '^%$$',$(LINK_EXCLUDE_PATHS))) \
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>> linkfarm.stamp.tmp ; ) \
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$(foreach f, $(LINK_FILES), \
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echo $(f) >> linkfarm.stamp.tmp ;)
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cmp -s linkfarm.stamp.tmp linkfarm.stamp && \
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rm linkfarm.stamp.tmp || { \
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cat linkfarm.stamp.tmp | while read f; \
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do rm -f "$(D)/$$f"; ln -s "$(XEN_ROOT)/$$f" "$(D)/$$f"; done; \
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mv linkfarm.stamp.tmp linkfarm.stamp; \
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}
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# Copy enough of the tree to build the shim hypervisor
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$(D): linkfarm.stamp
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$(MAKE) -C $(D)/xen distclean
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$(D)/xen/.config: $(D)
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$(MAKE) -C $(@D) KBUILD_DEFCONFIG=pvshim_defconfig defconfig
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xen-shim: $(D)/xen/.config
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$(MAKE) -C $(<D) build
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ln -sf $(D)/xen/xen $@
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ln -sf $(D)/xen/xen-syms $@-syms
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.PHONY: distclean clean
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distclean clean:
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rm -f xen-shim xen-shim-syms *.old
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rm -rf $(D)
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rm -f linkfarm.stamp*
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