mk/target.mk

   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.
   4 #
   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.
  10
  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
  15
  16 # Used as defaults for the runtime ar and cc tools
  17 export CFG_DEFAULT_LINKER
  18 export CFG_DEFAULT_AR
  19
  20 # Macro that generates the full list of dependencies for a crate at a particular
  21 # stage/target/host tuple.
  22 #
  23 # $(1) - stage
  24 # $(2) - target
  25 # $(3) - host
  26 # $(4) crate
  27 define RUST_CRATE_FULLDEPS
  28 CRATE_FULLDEPS_$(1)_T_$(2)_H_$(3)_$(4) := \
  29                 $$(CRATEFILE_$(4)) \
  30                 $$(RSINPUTS_$(4)) \
  31                 $$(foreach dep,$$(RUST_DEPS_$(4)_T_$(2)), \
  32                   $$(TLIB$(1)_T_$(2)_H_$(3))/stamp.$$(dep)) \
  33                 $$(foreach dep,$$(NATIVE_DEPS_$(4)), \
  34                   $$(RT_OUTPUT_DIR_$(2))/$$(call CFG_STATIC_LIB_NAME_$(2),$$(dep))) \
  35                 $$(foreach dep,$$(NATIVE_DEPS_$(4)_T_$(2)), \
  36                   $$(RT_OUTPUT_DIR_$(2))/$$(dep))
  37 endef
  38
  39 $(foreach host,$(CFG_HOST), \
  40  $(foreach target,$(CFG_TARGET), \
  41   $(foreach stage,$(STAGES), \
  42    $(foreach crate,$(CRATES), \
  43     $(eval $(call RUST_CRATE_FULLDEPS,$(stage),$(target),$(host),$(crate)))))))
  44
  45 # RUST_TARGET_STAGE_N template: This defines how target artifacts are built
  46 # for all stage/target architecture combinations. This is one giant rule which
  47 # works as follows:
  48 #
  49 #   1. The immediate dependencies are the rust source files
  50 #   2. Each rust crate dependency is listed (based on their stamp files),
  51 #      as well as all native dependencies (listed in RT_OUTPUT_DIR)
  52 #   3. The stage (n-1) compiler is required through the TSREQ dependency
  53 #   4. When actually executing the rule, the first thing we do is to clean out
  54 #      old libs and rlibs via the REMOVE_ALL_OLD_GLOB_MATCHES macro
  55 #   5. Finally, we get around to building the actual crate. It's just one
  56 #      "small" invocation of the previous stage rustc. We use -L to
  57 #      RT_OUTPUT_DIR so all the native dependencies are picked up.
  58 #      Additionally, we pass in the llvm dir so rustc can link against it.
  59 #   6. Some cleanup is done (listing what was just built) if verbose is turned
  60 #      on.
  61 #
  62 # $(1) is the stage
  63 # $(2) is the target triple
  64 # $(3) is the host triple
  65 # $(4) is the crate name
  66 define RUST_TARGET_STAGE_N
  67
  68 $$(TLIB$(1)_T_$(2)_H_$(3))/stamp.$(4): CFG_COMPILER_HOST_TRIPLE = $(2)
  69 $$(TLIB$(1)_T_$(2)_H_$(3))/stamp.$(4): \
  70                 $$(CRATEFILE_$(4)) \
  71                 $$(CRATE_FULLDEPS_$(1)_T_$(2)_H_$(3)_$(4)) \
  72                 $$(LLVM_CONFIG_$(2)) \
  73                 $$(TSREQ$(1)_T_$(2)_H_$(3)) \
  74                 | $$(TLIB$(1)_T_$(2)_H_$(3))/
  75         @$$(call E, rustc: $$(@D)/lib$(4))
  76         @touch $$@.start_time
  77         $$(call REMOVE_ALL_OLD_GLOB_MATCHES, \
  78             $$(dir $$@)$$(call CFG_LIB_GLOB_$(2),$(4)))
  79         $$(call REMOVE_ALL_OLD_GLOB_MATCHES, \
  80             $$(dir $$@)$$(call CFG_RLIB_GLOB,$(4)))
  81         $(Q)CFG_LLVM_LINKAGE_FILE=$$(LLVM_LINKAGE_PATH_$(2)) \
  82             $$(subst @,,$$(STAGE$(1)_T_$(2)_H_$(3))) \
  83                 $$(RUST_LIB_FLAGS_ST$(1)) \
  84                 -L "$$(RT_OUTPUT_DIR_$(2))" \
  85                 $$(LLVM_LIBDIR_RUSTFLAGS_$(2)) \
  86                 $$(LLVM_STDCPP_RUSTFLAGS_$(2)) \
  87                 $$(RUSTFLAGS_$(4)) \
  88                 $$(RUSTFLAGS$(1)_$(4)) \
  89                 $$(RUSTFLAGS$(1)_$(4)_T_$(2)) \
  90                 --out-dir $$(@D) \
  91                 -C extra-filename=-$$(CFG_FILENAME_EXTRA) \
  92                 -C metadata=$$(CFG_FILENAME_EXTRA) \
  93                 $$<
  94         @touch -r $$@.start_time $$@ && rm $$@.start_time
  95         $$(call LIST_ALL_OLD_GLOB_MATCHES, \
  96             $$(dir $$@)$$(call CFG_LIB_GLOB_$(2),$(4)))
  97         $$(call LIST_ALL_OLD_GLOB_MATCHES, \
  98             $$(dir $$@)$$(call CFG_RLIB_GLOB,$(4)))
  99
 100 endef
 101
 102 # Macro for building any tool as part of the rust compilation process. Each
 103 # tool is defined in crates.mk with a list of library dependencies as well as
 104 # the source file for the tool. Building each tool will also be passed '--cfg
 105 # <tool>' for usage in driver.rs
 106 #
 107 # This build rule is similar to the one found above, just tweaked for
 108 # locations and things.
 109 #
 110 # $(1) - stage
 111 # $(2) - target triple
 112 # $(3) - host triple
 113 # $(4) - name of the tool being built
 114 define TARGET_TOOL
 115
 116 $$(TBIN$(1)_T_$(2)_H_$(3))/$(4)$$(X_$(2)): \
 117                 $$(TOOL_SOURCE_$(4)) \
 118                 $$(TOOL_INPUTS_$(4)) \
 119                 $$(foreach dep,$$(TOOL_DEPS_$(4)), \
 120                     $$(TLIB$(1)_T_$(2)_H_$(3))/stamp.$$(dep)) \
 121                 $$(TSREQ$(1)_T_$(2)_H_$(3)) \
 122                 | $$(TBIN$(1)_T_$(2)_H_$(3))/
 123         @$$(call E, rustc: $$@)
 124         $$(STAGE$(1)_T_$(2)_H_$(3)) \
 125                 $$(LLVM_LIBDIR_RUSTFLAGS_$(2)) \
 126                 -o $$@ $$< --cfg $(4)
 127
 128 endef
 129
 130 # Macro for building runtime startup/shutdown object files;
 131 # these are Rust's equivalent of crti.o, crtn.o
 132 #
 133 # $(1) - stage
 134 # $(2) - target triple
 135 # $(3) - host triple
 136 # $(4) - object basename
 137 define TARGET_RUSTRT_STARTUP_OBJ
 138
 139 $$(TLIB$(1)_T_$(2)_H_$(3))/$(4).o: \
 140                 $(S)src/rtstartup/$(4).rs \
 141                 $$(TLIB$(1)_T_$(2)_H_$(3))/stamp.core \
 142                 $$(HSREQ$(1)_T_$(2)_H_$(3)) \
 143                 | $$(TBIN$(1)_T_$(2)_H_$(3))/
 144         @$$(call E, rustc: $$@)
 145         $$(STAGE$(1)_T_$(2)_H_$(3)) --emit=obj -o $$@ $$<
 146
 147 ifeq ($$(CFG_RUSTRT_HAS_STARTUP_OBJS_$(2)), 1)
 148 # Add dependencies on Rust startup objects to all crates that depend on core.
 149 # This ensures that they are built after core (since they depend on it),
 150 # but before everything else (since they are needed for linking dylib crates).
 151 $$(foreach crate, $$(TARGET_CRATES_$(2)), \
 152         $$(if $$(findstring core,$$(DEPS_$$(crate))), \
 153                 $$(TLIB$(1)_T_$(2)_H_$(3))/stamp.$$(crate))) : $$(TLIB$(1)_T_$(2)_H_$(3))/$(4).o
 154 endif
 155
 156 endef
 157
 158 # Every recipe in RUST_TARGET_STAGE_N outputs to $$(TLIB$(1)_T_$(2)_H_$(3),
 159 # a directory that can be cleaned out during the middle of a run of
 160 # the get-snapshot.py script.  Therefore, every recipe needs to have
 161 # an order-only dependency either on $(SNAPSHOT_RUSTC_POST_CLEANUP) or
 162 # on $$(TSREQ$(1)_T_$(2)_H_$(3)), to ensure that no products will be
 163 # put into the target area until after the get-snapshot.py script has
 164 # had its chance to clean it out; otherwise the other products will be
 165 # inadvertently included in the clean out.
 166 SNAPSHOT_RUSTC_POST_CLEANUP=$(HBIN0_H_$(CFG_BUILD))/rustc$(X_$(CFG_BUILD))
 167
 168 define TARGET_HOST_RULES
 169
 170 $$(TLIB$(1)_T_$(2)_H_$(3))/:
 171         mkdir -p $$@
 172
 173 $$(TLIB$(1)_T_$(2)_H_$(3))/%: $$(RT_OUTPUT_DIR_$(2))/% \
 174             | $$(TLIB$(1)_T_$(2)_H_$(3))/ $$(SNAPSHOT_RUSTC_POST_CLEANUP)
 175         @$$(call E, cp: $$@)
 176         $$(Q)cp $$< $$@
 177 endef
 178
 179 $(foreach source,$(CFG_HOST), \
 180  $(foreach target,$(CFG_TARGET), \
 181   $(eval $(call TARGET_HOST_RULES,0,$(target),$(source))) \
 182   $(eval $(call TARGET_HOST_RULES,1,$(target),$(source))) \
 183   $(eval $(call TARGET_HOST_RULES,2,$(target),$(source))) \
 184   $(eval $(call TARGET_HOST_RULES,3,$(target),$(source)))))
 185
 186 # In principle, each host can build each target for both libs and tools
 187 $(foreach crate,$(CRATES), \
 188  $(foreach source,$(CFG_HOST), \
 189   $(foreach target,$(CFG_TARGET), \
 190    $(eval $(call RUST_TARGET_STAGE_N,0,$(target),$(source),$(crate))) \
 191    $(eval $(call RUST_TARGET_STAGE_N,1,$(target),$(source),$(crate))) \
 192    $(eval $(call RUST_TARGET_STAGE_N,2,$(target),$(source),$(crate))) \
 193    $(eval $(call RUST_TARGET_STAGE_N,3,$(target),$(source),$(crate))))))
 194
 195 $(foreach host,$(CFG_HOST), \
 196  $(foreach target,$(CFG_TARGET), \
 197   $(foreach stage,$(STAGES), \
 198    $(foreach tool,$(TOOLS), \
 199     $(eval $(call TARGET_TOOL,$(stage),$(target),$(host),$(tool)))))))
 200
 201 $(foreach host,$(CFG_HOST), \
 202  $(foreach target,$(CFG_TARGET), \
 203   $(foreach stage,$(STAGES), \
 204    $(foreach obj,rsbegin rsend, \
 205     $(eval $(call TARGET_RUSTRT_STARTUP_OBJ,$(stage),$(target),$(host),$(obj)))))))