1 # We borrow heavily from the kernel build setup, though we are simpler since
2 # we don't have Kconfig tweaking settings on us.
4 # The implicit make rules have it looking for RCS files, among other things.
5 # We instead explicitly write all the rules we care about.
6 # It's even quicker (saves ~200ms) to pass -r on the command line.
9 # The source directory tree.
12 # The name of the builddir.
15 # The V=1 flag on command line makes us verbosely print command lines.
22 # Specify BUILDTYPE=Release on the command line for a release build.
25 # Directory all our build output goes into.
26 # Note that this must be two directories beneath src/ for unit tests to pass,
27 # as they reach into the src/ directory for data with relative paths.
28 builddir ?= $(builddir_name)/$(BUILDTYPE)
29 abs_builddir := $(abspath $(builddir))
30 depsdir := $(builddir)/.deps
32 # Object output directory.
33 obj := $(builddir)/obj
34 abs_obj := $(abspath $(obj))
36 # We build up a list of every single one of the targets so we can slurp in the
37 # generated dependency rule Makefiles in one pass.
42 # C++ apps need to be linked with g++.
44 # Note: flock is used to seralize linking. Linking is a memory-intensive
45 # process so running parallel links can often lead to thrashing. To disable
46 # the serialization, override LINK via an envrionment variable as follows:
50 # This will allow make to invoke N linker processes as specified in -jN.
51 LINK ?= flock $(builddir)/linker.lock $(CXX)
54 CFLAGS.target ?= $(CFLAGS)
56 CXXFLAGS.target ?= $(CXXFLAGS)
57 LINK.target ?= $(LINK)
58 LDFLAGS.target ?= $(LDFLAGS)
60 ARFLAGS.target ?= crsT
62 # N.B.: the logic of which commands to run should match the computation done
63 # in gyp's make.py where ARFLAGS.host etc. is computed.
64 # TODO(evan): move all cross-compilation logic to gyp-time so we don't need
65 # to replicate this environment fallback in make as well.
75 # Define a dir function that can handle spaces.
76 # http://www.gnu.org/software/make/manual/make.html#Syntax-of-Functions
77 # "leading spaces cannot appear in the text of the first argument as written.
78 # These characters can be put into the argument value by variable substitution."
80 space := $(empty) $(empty)
82 # http://stackoverflow.com/questions/1189781/using-make-dir-or-notdir-on-a-path-with-spaces
83 replace_spaces = $(subst $(space),?,$1)
84 unreplace_spaces = $(subst ?,$(space),$1)
85 dirx = $(call unreplace_spaces,$(dir $(call replace_spaces,$1)))
87 # Flags to make gcc output dependency info. Note that you need to be
88 # careful here to use the flags that ccache and distcc can understand.
89 # We write to a dep file on the side first and then rename at the end
90 # so we can't end up with a broken dep file.
91 depfile = $(depsdir)/$(call replace_spaces,$@).d
92 DEPFLAGS = -MMD -MF $(depfile).raw
94 # We have to fixup the deps output in a few ways.
95 # (1) the file output should mention the proper .o file.
96 # ccache or distcc lose the path to the target, so we convert a rule of
100 # path/to/foobar.o: DEP1 DEP2
101 # (2) we want missing files not to cause us to fail to build.
103 # foobar.o: DEP1 DEP2 \
109 # so if the files are missing, they're just considered phony rules.
110 # We have to do some pretty insane escaping to get those backslashes
111 # and dollar signs past make, the shell, and sed at the same time.
112 # Doesn't work with spaces, but that's fine: .d files have spaces in
113 # their names replaced with other characters.
115 # The depfile may not exist if the input file didn't have any #includes.
117 # Fixup path as in (1).
118 sed -e "s|^$(notdir $@)|$@|" $(depfile).raw >> $(depfile)
119 # Add extra rules as in (2).
120 # We remove slashes and replace spaces with new lines;
121 # remove blank lines;
122 # delete the first line and append a colon to the remaining lines.
123 sed -e 's|\\||' -e 'y| |\n|' $(depfile).raw |\
125 sed -e 1d -e 's|$$|:|' \
130 # Command definitions:
131 # - cmd_foo is the actual command to run;
132 # - quiet_cmd_foo is the brief-output summary of the command.
134 quiet_cmd_cc = CC($(TOOLSET)) $@
135 cmd_cc = $(CC.$(TOOLSET)) $(GYP_CFLAGS) $(DEPFLAGS) $(CFLAGS.$(TOOLSET)) -c -o $@ $<
137 quiet_cmd_cxx = CXX($(TOOLSET)) $@
138 cmd_cxx = $(CXX.$(TOOLSET)) $(GYP_CXXFLAGS) $(DEPFLAGS) $(CXXFLAGS.$(TOOLSET)) -c -o $@ $<
140 quiet_cmd_touch = TOUCH $@
143 quiet_cmd_copy = COPY $@
144 # send stderr to /dev/null to ignore messages when linking directories.
145 cmd_copy = ln -f "$<" "$@" 2>/dev/null || (rm -rf "$@" && cp -af "$<" "$@")
147 quiet_cmd_alink = AR($(TOOLSET)) $@
148 cmd_alink = rm -f $@ && $(AR.$(TOOLSET)) $(ARFLAGS.$(TOOLSET)) $@ $(filter %.o,$^)
150 # Due to circular dependencies between libraries :(, we wrap the
151 # special "figure out circular dependencies" flags around the entire
152 # input list during linking.
153 quiet_cmd_link = LINK($(TOOLSET)) $@
154 cmd_link = $(LINK.$(TOOLSET)) $(GYP_LDFLAGS) $(LDFLAGS.$(TOOLSET)) -o $@ -Wl,--start-group $(LD_INPUTS) -Wl,--end-group $(LIBS)
156 # We support two kinds of shared objects (.so):
157 # 1) shared_library, which is just bundling together many dependent libraries
159 # 2) loadable_module, which is generating a module intended for dlopen().
161 # They differ only slightly:
162 # In the former case, we want to package all dependent code into the .so.
163 # In the latter case, we want to package just the API exposed by the
165 # This means shared_library uses --whole-archive, while loadable_module doesn't.
166 # (Note that --whole-archive is incompatible with the --start-group used in
169 # Other shared-object link notes:
170 # - Set SONAME to the library filename so our binaries don't reference
171 # the local, absolute paths used on the link command-line.
172 quiet_cmd_solink = SOLINK($(TOOLSET)) $@
173 cmd_solink = $(LINK.$(TOOLSET)) -shared $(GYP_LDFLAGS) $(LDFLAGS.$(TOOLSET)) -Wl,-soname=$(@F) -o $@ -Wl,--whole-archive $(LD_INPUTS) -Wl,--no-whole-archive $(LIBS)
175 quiet_cmd_solink_module = SOLINK_MODULE($(TOOLSET)) $@
176 cmd_solink_module = $(LINK.$(TOOLSET)) -shared $(GYP_LDFLAGS) $(LDFLAGS.$(TOOLSET)) -Wl,-soname=$(@F) -o $@ -Wl,--start-group $(filter-out FORCE_DO_CMD, $^) -Wl,--end-group $(LIBS)
179 # Define an escape_quotes function to escape single quotes.
180 # This allows us to handle quotes properly as long as we always use
181 # use single quotes and escape_quotes.
182 escape_quotes = $(subst ','\'',$(1))
183 # This comment is here just to include a ' to unconfuse syntax highlighting.
184 # Define an escape_vars function to escape '$' variable syntax.
185 # This allows us to read/write command lines with shell variables (e.g.
186 # $LD_LIBRARY_PATH), without triggering make substitution.
187 escape_vars = $(subst $$,$$$$,$(1))
188 # Helper that expands to a shell command to echo a string exactly as it is in
189 # make. This uses printf instead of echo because printf's behaviour with respect
190 # to escape sequences is more portable than echo's across different shells
191 # (e.g., dash, bash).
192 exact_echo = printf '%s\n' '$(call escape_quotes,$(1))'
194 # Helper to compare the command we're about to run against the command
195 # we logged the last time we ran the command. Produces an empty
196 # string (false) when the commands match.
197 # Tricky point: Make has no string-equality test function.
198 # The kernel uses the following, but it seems like it would have false
199 # positives, where one string reordered its arguments.
200 # arg_check = $(strip $(filter-out $(cmd_$(1)), $(cmd_$@)) \
201 # $(filter-out $(cmd_$@), $(cmd_$(1))))
202 # We instead substitute each for the empty string into the other, and
203 # say they're equal if both substitutions produce the empty string.
204 # .d files contain ? instead of spaces, take that into account.
205 command_changed = $(or $(subst $(cmd_$(1)),,$(cmd_$(call replace_spaces,$@))),\
206 $(subst $(cmd_$(call replace_spaces,$@)),,$(cmd_$(1))))
208 # Helper that is non-empty when a prerequisite changes.
209 # Normally make does this implicitly, but we force rules to always run
210 # so we can check their command lines.
211 # $? -- new prerequisites
212 # $| -- order-only dependencies
213 prereq_changed = $(filter-out FORCE_DO_CMD,$(filter-out $|,$?))
215 # Helper that executes all postbuilds, and deletes the output file when done
216 # if any of the postbuilds failed.
219 for p in $(POSTBUILDS); do\
222 if [ $$F -ne 0 ]; then\
226 if [ $$E -ne 0 ]; then\
232 # do_cmd: run a command via the above cmd_foo names, if necessary.
233 # Should always run for a given target to handle command-line changes.
234 # Second argument, if non-zero, makes it do asm/C/C++ dependency munging.
235 # Third argument, if non-zero, makes it do POSTBUILDS processing.
236 # Note: We intentionally do NOT call dirx for depfile, since it contains ? for
237 # spaces already and dirx strips the ? characters.
239 $(if $(or $(command_changed),$(prereq_changed)),
240 @$(call exact_echo, $($(quiet)cmd_$(1)))
241 @mkdir -p "$(call dirx,$@)" "$(dir $(depfile))"
242 $(if $(findstring flock,$(word 1,$(cmd_$1))),
244 @echo " $(quiet_cmd_$(1)): Finished",
247 @$(call exact_echo,$(call escape_vars,cmd_$(call replace_spaces,$@) := $(cmd_$(1)))) > $(depfile)
248 @$(if $(2),$(fixup_dep))
249 $(if $(and $(3), $(POSTBUILDS)),
250 $(call do_postbuilds)
255 # Declare "all" target first so it is the default, even though we don't have the
260 # Use FORCE_DO_CMD to force a target to run. Should be coupled with
266 # Suffix rules, putting all outputs into $(obj).
267 $(obj).$(TOOLSET)/%.o: $(srcdir)/%.c FORCE_DO_CMD
269 $(obj).$(TOOLSET)/%.o: $(srcdir)/%.cc FORCE_DO_CMD
270 @$(call do_cmd,cxx,1)
271 $(obj).$(TOOLSET)/%.o: $(srcdir)/%.cpp FORCE_DO_CMD
272 @$(call do_cmd,cxx,1)
273 $(obj).$(TOOLSET)/%.o: $(srcdir)/%.cxx FORCE_DO_CMD
274 @$(call do_cmd,cxx,1)
275 $(obj).$(TOOLSET)/%.o: $(srcdir)/%.S FORCE_DO_CMD
277 $(obj).$(TOOLSET)/%.o: $(srcdir)/%.s FORCE_DO_CMD
280 # Try building from generated source, too.
281 $(obj).$(TOOLSET)/%.o: $(obj).$(TOOLSET)/%.c FORCE_DO_CMD
283 $(obj).$(TOOLSET)/%.o: $(obj).$(TOOLSET)/%.cc FORCE_DO_CMD
284 @$(call do_cmd,cxx,1)
285 $(obj).$(TOOLSET)/%.o: $(obj).$(TOOLSET)/%.cpp FORCE_DO_CMD
286 @$(call do_cmd,cxx,1)
287 $(obj).$(TOOLSET)/%.o: $(obj).$(TOOLSET)/%.cxx FORCE_DO_CMD
288 @$(call do_cmd,cxx,1)
289 $(obj).$(TOOLSET)/%.o: $(obj).$(TOOLSET)/%.S FORCE_DO_CMD
291 $(obj).$(TOOLSET)/%.o: $(obj).$(TOOLSET)/%.s FORCE_DO_CMD
294 $(obj).$(TOOLSET)/%.o: $(obj)/%.c FORCE_DO_CMD
296 $(obj).$(TOOLSET)/%.o: $(obj)/%.cc FORCE_DO_CMD
297 @$(call do_cmd,cxx,1)
298 $(obj).$(TOOLSET)/%.o: $(obj)/%.cpp FORCE_DO_CMD
299 @$(call do_cmd,cxx,1)
300 $(obj).$(TOOLSET)/%.o: $(obj)/%.cxx FORCE_DO_CMD
301 @$(call do_cmd,cxx,1)
302 $(obj).$(TOOLSET)/%.o: $(obj)/%.S FORCE_DO_CMD
304 $(obj).$(TOOLSET)/%.o: $(obj)/%.s FORCE_DO_CMD
308 ifeq ($(strip $(foreach prefix,$(NO_LOAD),\
309 $(findstring $(join ^,$(prefix)),\
310 $(join ^,src/libuv/run-benchmarks.target.mk)))),)
311 include src/libuv/run-benchmarks.target.mk
313 ifeq ($(strip $(foreach prefix,$(NO_LOAD),\
314 $(findstring $(join ^,$(prefix)),\
315 $(join ^,src/libuv/run-tests.target.mk)))),)
316 include src/libuv/run-tests.target.mk
318 ifeq ($(strip $(foreach prefix,$(NO_LOAD),\
319 $(findstring $(join ^,$(prefix)),\
320 $(join ^,src/libuv/uv.target.mk)))),)
321 include src/libuv/uv.target.mk
324 quiet_cmd_regen_makefile = ACTION Regenerating $@
325 cmd_regen_makefile = ./src/libuv/build/gyp/gyp -fmake --ignore-environment "--toplevel-dir=." "--depth=." "--generator-output=mk/libuv/x86_64/win" "-Dlibrary=static_library" "-Dtarget_arch=x86_64" "-DOS=win" src/libuv/uv.gyp
326 Makefile: $(srcdir)/src/libuv/uv.gyp
327 # $(call do_cmd,regen_makefile)
329 # "all" is a concatenation of the "all" targets from all the included
330 # sub-makefiles. This is just here to clarify.
333 # Add in dependency-tracking rules. $(all_deps) is the list of every single
334 # target in our tree. Only consider the ones with .d (dependency) info:
335 d_files := $(wildcard $(foreach f,$(all_deps),$(depsdir)/$(f).d))
337 # Rather than include each individual .d file, concatenate them into a
338 # single file which make is able to load faster. We split this into
339 # commands that take 1000 files at a time to avoid overflowing the
341 $(shell cat $(wordlist 1,1000,$(d_files)) > $(depsdir)/all.deps)
343 ifneq ($(word 1001,$(d_files)),)
344 $(error Found unprocessed dependency files (gyp didn't generate enough rules!))
347 # make looks for ways to re-generate included makefiles, but in our case, we
348 # don't have a direct way. Explicitly telling make that it has nothing to do
349 # for them makes it go faster.
350 $(depsdir)/all.deps: ;
352 include $(depsdir)/all.deps