1 # Copyright 2012 The Rust Project Developers. See the COPYRIGHT
2 # file at the top-level directory of this distribution and at
3 # http://rust-lang.org/COPYRIGHT.
5 # Licensed under the Apache License, Version 2.0 <LICENSE-APACHE or
6 # http://www.apache.org/licenses/LICENSE-2.0> or the MIT license
7 # <LICENSE-MIT or http://opensource.org/licenses/MIT>, at your
8 # option. This file may not be copied, modified, or distributed
9 # except according to those terms.
11 # This is the compile-time target-triple for the compiler. For the compiler at
12 # runtime, this should be considered the host-triple. More explanation for why
13 # this exists can be found on issue #2400
14 export CFG_COMPILER_HOST_TRIPLE
16 # Used as defaults for the runtime ar and cc tools
17 export CFG_DEFAULT_LINKER
20 # The standard libraries should be held up to a higher standard than any old
21 # code, make sure that these common warnings are denied by default. These can
22 # be overridden during development temporarily. For stage0, we allow warnings
23 # which may be bugs in stage0 (should be fixed in stage1+)
24 RUST_LIB_FLAGS_ST0 += -W warnings
25 RUST_LIB_FLAGS_ST1 += -D warnings
26 RUST_LIB_FLAGS_ST2 += -D warnings
28 # Macro that generates the full list of dependencies for a crate at a particular
29 # stage/target/host tuple.
35 define RUST_CRATE_FULLDEPS
36 CRATE_FULLDEPS_$(1)_T_$(2)_H_$(3)_$(4) := \
39 $$(foreach dep,$$(RUST_DEPS_$(4)), \
40 $$(TLIB$(1)_T_$(2)_H_$(3))/stamp.$$(dep)) \
41 $$(foreach dep,$$(NATIVE_DEPS_$(4)), \
42 $$(RT_OUTPUT_DIR_$(2))/$$(call CFG_STATIC_LIB_NAME_$(2),$$(dep))) \
43 $$(foreach dep,$$(NATIVE_DEPS_$(4)_T_$(2)), \
44 $$(RT_OUTPUT_DIR_$(2))/$$(dep))
47 $(foreach host,$(CFG_HOST), \
48 $(foreach target,$(CFG_TARGET), \
49 $(foreach stage,$(STAGES), \
50 $(foreach crate,$(CRATES), \
51 $(eval $(call RUST_CRATE_FULLDEPS,$(stage),$(target),$(host),$(crate)))))))
53 # RUST_TARGET_STAGE_N template: This defines how target artifacts are built
54 # for all stage/target architecture combinations. This is one giant rule which
57 # 1. The immediate dependencies are the rust source files
58 # 2. Each rust crate dependency is listed (based on their stamp files),
59 # as well as all native dependencies (listed in RT_OUTPUT_DIR)
60 # 3. The stage (n-1) compiler is required through the TSREQ dependency
61 # 4. When actually executing the rule, the first thing we do is to clean out
62 # old libs and rlibs via the REMOVE_ALL_OLD_GLOB_MATCHES macro
63 # 5. Finally, we get around to building the actual crate. It's just one
64 # "small" invocation of the previous stage rustc. We use -L to
65 # RT_OUTPUT_DIR so all the native dependencies are picked up.
66 # Additionally, we pass in the llvm dir so rustc can link against it.
67 # 6. Some cleanup is done (listing what was just built) if verbose is turned
71 # $(2) is the target triple
72 # $(3) is the host triple
73 # $(4) is the crate name
74 define RUST_TARGET_STAGE_N
76 $$(TLIB$(1)_T_$(2)_H_$(3))/stamp.$(4): CFG_COMPILER_HOST_TRIPLE = $(2)
77 $$(TLIB$(1)_T_$(2)_H_$(3))/stamp.$(4): \
79 $$(CRATE_FULLDEPS_$(1)_T_$(2)_H_$(3)_$(4)) \
80 $$(LLVM_CONFIG_$(2)) \
81 $$(TSREQ$(1)_T_$(2)_H_$(3)) \
82 | $$(TLIB$(1)_T_$(2)_H_$(3))/
83 @$$(call E, rustc: $$(@D)/lib$(4))
85 $$(call REMOVE_ALL_OLD_GLOB_MATCHES, \
86 $$(dir $$@)$$(call CFG_LIB_GLOB_$(2),$(4)))
87 $$(call REMOVE_ALL_OLD_GLOB_MATCHES, \
88 $$(dir $$@)$$(call CFG_RLIB_GLOB,$(4)))
89 $(Q)CFG_LLVM_LINKAGE_FILE=$$(LLVM_LINKAGE_PATH_$(2)) \
90 $$(subst @,,$$(STAGE$(1)_T_$(2)_H_$(3))) \
91 $$(RUST_LIB_FLAGS_ST$(1)) \
92 -L "$$(RT_OUTPUT_DIR_$(2))" \
93 $$(LLVM_LIBDIR_RUSTFLAGS_$(2)) \
94 $$(LLVM_STDCPP_RUSTFLAGS_$(2)) \
96 $$(RUSTFLAGS$(1)_$(4)) \
97 $$(RUSTFLAGS$(1)_$(4)_T_$(2)) \
99 -C extra-filename=-$$(CFG_FILENAME_EXTRA) \
101 @touch -r $$@.start_time $$@ && rm $$@.start_time
102 $$(call LIST_ALL_OLD_GLOB_MATCHES, \
103 $$(dir $$@)$$(call CFG_LIB_GLOB_$(2),$(4)))
104 $$(call LIST_ALL_OLD_GLOB_MATCHES, \
105 $$(dir $$@)$$(call CFG_RLIB_GLOB,$(4)))
109 # Macro for building any tool as part of the rust compilation process. Each
110 # tool is defined in crates.mk with a list of library dependencies as well as
111 # the source file for the tool. Building each tool will also be passed '--cfg
112 # <tool>' for usage in driver.rs
114 # This build rule is similar to the one found above, just tweaked for
115 # locations and things.
118 # $(2) - target triple
120 # $(4) - name of the tool being built
123 $$(TBIN$(1)_T_$(2)_H_$(3))/$(4)$$(X_$(2)): \
124 $$(TOOL_SOURCE_$(4)) \
125 $$(TOOL_INPUTS_$(4)) \
126 $$(foreach dep,$$(TOOL_DEPS_$(4)), \
127 $$(TLIB$(1)_T_$(2)_H_$(3))/stamp.$$(dep)) \
128 $$(TSREQ$(1)_T_$(2)_H_$(3)) \
129 | $$(TBIN$(1)_T_$(2)_H_$(3))/
130 @$$(call E, rustc: $$@)
131 $$(STAGE$(1)_T_$(2)_H_$(3)) -o $$@ $$< --cfg $(4)
135 # Macro for building runtime startup objects
136 # Of those we have two kinds:
137 # - Rust runtime-specific: these are Rust's equivalents of GCC's crti.o/crtn.o,
138 # - LibC-specific: these we don't build ourselves, but copy them from the system lib directory.
141 # $(2) - target triple
143 define TARGET_RT_STARTUP
145 # Expand build rules for rsbegin.o and rsend.o
146 $$(foreach obj,rsbegin rsend, \
147 $$(eval $$(call TARGET_RUSTRT_STARTUP_OBJ,$(1),$(2),$(3),$$(obj))) )
149 # Expand build rules for libc startup objects
150 $$(foreach obj,$$(CFG_LIBC_STARTUP_OBJECTS_$(2)), \
151 $$(eval $$(call TARGET_LIBC_STARTUP_OBJ,$(1),$(2),$(3),$$(obj))) )
155 # Macro for building runtime startup/shutdown object files;
156 # these are Rust's equivalent of crti.o, crtn.o
159 # $(2) - target triple
161 # $(4) - object basename
162 define TARGET_RUSTRT_STARTUP_OBJ
164 $$(TLIB$(1)_T_$(2)_H_$(3))/$(4).o: \
165 $(S)src/rtstartup/$(4).rs \
166 $$(TLIB$(1)_T_$(2)_H_$(3))/stamp.core \
167 $$(HSREQ$(1)_T_$(2)_H_$(3)) \
168 | $$(TBIN$(1)_T_$(2)_H_$(3))/
169 @$$(call E, rustc: $$@)
170 $$(STAGE$(1)_T_$(2)_H_$(3)) --emit=obj -o $$@ $$<
172 # Add dependencies on Rust startup objects to all crates that depend on core.
173 # This ensures that they are built after core (since they depend on it),
174 # but before everything else (since they are needed for linking dylib crates).
175 $$(foreach crate, $$(TARGET_CRATES), \
176 $$(if $$(findstring core,$$(DEPS_$$(crate))), \
177 $$(TLIB$(1)_T_$(2)_H_$(3))/stamp.$$(crate))) : $$(TLIB$(1)_T_$(2)_H_$(3))/$(4).o
181 # Macro for copying libc startup objects into the target's lib directory.
184 # $(2) - target triple
187 define TARGET_LIBC_STARTUP_OBJ
189 # Ask gcc where the startup object is located
190 $$(TLIB$(1)_T_$(2)_H_$(3))/$(4) : $$(shell $$(CC_$(2)) -print-file-name=$(4))
194 # Make sure this is done before libcore has finished building
195 # (libcore itself does not depend on these objects, but other crates do,
196 # so might as well do it here)
197 $$(TLIB$(1)_T_$(2)_H_$(3))/stamp.core : $$(TLIB$(1)_T_$(2)_H_$(3))/$(4)
202 # Every recipe in RUST_TARGET_STAGE_N outputs to $$(TLIB$(1)_T_$(2)_H_$(3),
203 # a directory that can be cleaned out during the middle of a run of
204 # the get-snapshot.py script. Therefore, every recipe needs to have
205 # an order-only dependency either on $(SNAPSHOT_RUSTC_POST_CLEANUP) or
206 # on $$(TSREQ$(1)_T_$(2)_H_$(3)), to ensure that no products will be
207 # put into the target area until after the get-snapshot.py script has
208 # had its chance to clean it out; otherwise the other products will be
209 # inadvertently included in the clean out.
210 SNAPSHOT_RUSTC_POST_CLEANUP=$(HBIN0_H_$(CFG_BUILD))/rustc$(X_$(CFG_BUILD))
212 define TARGET_HOST_RULES
214 $$(TLIB$(1)_T_$(2)_H_$(3))/:
217 $$(TLIB$(1)_T_$(2)_H_$(3))/%: $$(RT_OUTPUT_DIR_$(2))/% \
218 | $$(TLIB$(1)_T_$(2)_H_$(3))/ $$(SNAPSHOT_RUSTC_POST_CLEANUP)
223 $(foreach source,$(CFG_HOST), \
224 $(foreach target,$(CFG_TARGET), \
225 $(eval $(call TARGET_HOST_RULES,0,$(target),$(source))) \
226 $(eval $(call TARGET_HOST_RULES,1,$(target),$(source))) \
227 $(eval $(call TARGET_HOST_RULES,2,$(target),$(source))) \
228 $(eval $(call TARGET_HOST_RULES,3,$(target),$(source)))))
230 # In principle, each host can build each target for both libs and tools
231 $(foreach crate,$(CRATES), \
232 $(foreach source,$(CFG_HOST), \
233 $(foreach target,$(CFG_TARGET), \
234 $(eval $(call RUST_TARGET_STAGE_N,0,$(target),$(source),$(crate))) \
235 $(eval $(call RUST_TARGET_STAGE_N,1,$(target),$(source),$(crate))) \
236 $(eval $(call RUST_TARGET_STAGE_N,2,$(target),$(source),$(crate))) \
237 $(eval $(call RUST_TARGET_STAGE_N,3,$(target),$(source),$(crate))))))
239 $(foreach host,$(CFG_HOST), \
240 $(foreach target,$(CFG_TARGET), \
241 $(foreach stage,$(STAGES), \
242 $(foreach tool,$(TOOLS), \
243 $(eval $(call TARGET_TOOL,$(stage),$(target),$(host),$(tool)))))))
245 $(foreach host,$(CFG_HOST), \
246 $(foreach target,$(CFG_TARGET), \
247 $(foreach stage,$(STAGES), \
248 $(eval $(call TARGET_RT_STARTUP,$(stage),$(target),$(host))))))