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 # The standard libraries should be held up to a higher standard than any old
  17 # code, make sure that these common warnings are denied by default. These can
  18 # be overridden during development temporarily. For stage0, we allow warnings
  19 # which may be bugs in stage0 (should be fixed in stage1+)
  20 RUST_LIB_FLAGS_ST0 += -W warnings
  21 RUST_LIB_FLAGS_ST1 += -D warnings
  22 RUST_LIB_FLAGS_ST2 += -D warnings
  23
  24 # Macro that generates the full list of dependencies for a crate at a particular
  25 # stage/target/host tuple.
  26 #
  27 # $(1) - stage
  28 # $(2) - target
  29 # $(3) - host
  30 # $(4) crate
  31 define RUST_CRATE_FULLDEPS
  32 CRATE_FULLDEPS_$(1)_T_$(2)_H_$(3)_$(4) := \
  33                 $$(CRATEFILE_$(4)) \
  34                 $$(RSINPUTS_$(4)) \
  35                 $$(foreach dep,$$(RUST_DEPS_$(4)), \
  36                   $$(TLIB$(1)_T_$(2)_H_$(3))/stamp.$$(dep)) \
  37                 $$(foreach dep,$$(NATIVE_DEPS_$(4)), \
  38                   $$(RT_OUTPUT_DIR_$(2))/$$(call CFG_STATIC_LIB_NAME_$(2),$$(dep))) \
  39                 $$(foreach dep,$$(NATIVE_DEPS_$(4)_T_$(2)), \
  40                   $$(RT_OUTPUT_DIR_$(2))/$$(dep)) \
  41                 $$(foreach dep,$$(NATIVE_TOOL_DEPS_$(4)_T_$(2)), \
  42                   $$(TBIN$(1)_T_$(3)_H_$(3))/$$(dep)) \
  43                 $$(CUSTOM_DEPS_$(4)_T_$(2))
  44 endef
  45
  46 $(foreach host,$(CFG_HOST), \
  47  $(foreach target,$(CFG_TARGET), \
  48   $(foreach stage,$(STAGES), \
  49    $(foreach crate,$(CRATES), \
  50     $(eval $(call RUST_CRATE_FULLDEPS,$(stage),$(target),$(host),$(crate)))))))
  51
  52 # RUST_TARGET_STAGE_N template: This defines how target artifacts are built
  53 # for all stage/target architecture combinations. This is one giant rule which
  54 # works as follows:
  55 #
  56 #   1. The immediate dependencies are the rust source files
  57 #   2. Each rust crate dependency is listed (based on their stamp files),
  58 #      as well as all native dependencies (listed in RT_OUTPUT_DIR)
  59 #   3. The stage (n-1) compiler is required through the TSREQ dependency, along
  60 #      with the morestack library
  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
  68 #      on.
  69 #
  70 # $(1) is the stage
  71 # $(2) is the target triple
  72 # $(3) is the host triple
  73 # $(4) is the crate name
  74 define RUST_TARGET_STAGE_N
  75
  76 $$(TLIB$(1)_T_$(2)_H_$(3))/stamp.$(4): CFG_COMPILER_HOST_TRIPLE = $(2)
  77 $$(TLIB$(1)_T_$(2)_H_$(3))/stamp.$(4): \
  78                 $$(CRATEFILE_$(4)) \
  79                 $$(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: $$(@D)/lib$(4))
  84         @touch $$@.start_time
  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                 $$(LLVM_STDCPP_RUSTFLAGS_$(2)) \
  95                 $$(RUSTFLAGS_$(4)) \
  96                 $$(RUSTFLAGS_$(4)_T_$(2)) \
  97                 --out-dir $$(@D) \
  98                 -C extra-filename=-$$(CFG_FILENAME_EXTRA) \
  99                 $$<
 100         @touch -r $$@.start_time $$@ && rm $$@.start_time
 101         $$(call LIST_ALL_OLD_GLOB_MATCHES, \
 102             $$(dir $$@)$$(call CFG_LIB_GLOB_$(2),$(4)))
 103         $$(call LIST_ALL_OLD_GLOB_MATCHES, \
 104             $$(dir $$@)$$(call CFG_RLIB_GLOB,$(4)))
 105
 106 endef
 107
 108 # Macro for building any tool as part of the rust compilation process. Each
 109 # tool is defined in crates.mk with a list of library dependencies as well as
 110 # the source file for the tool. Building each tool will also be passed '--cfg
 111 # <tool>' for usage in driver.rs
 112 #
 113 # This build rule is similar to the one found above, just tweaked for
 114 # locations and things.
 115 #
 116 # $(1) - stage
 117 # $(2) - target triple
 118 # $(3) - host triple
 119 # $(4) - name of the tool being built
 120 define TARGET_TOOL
 121
 122 $$(TBIN$(1)_T_$(2)_H_$(3))/$(4)$$(X_$(2)): \
 123                 $$(TOOL_SOURCE_$(4)) \
 124                 $$(TOOL_INPUTS_$(4)) \
 125                 $$(foreach dep,$$(TOOL_DEPS_$(4)), \
 126                     $$(TLIB$(1)_T_$(2)_H_$(3))/stamp.$$(dep)) \
 127                 $$(TSREQ$(1)_T_$(2)_H_$(3)) \
 128                 | $$(TBIN$(1)_T_$(2)_H_$(3))/
 129         @$$(call E, rustc: $$@)
 130         $$(STAGE$(1)_T_$(2)_H_$(3)) -o $$@ $$< --cfg $(4)
 131
 132 endef
 133
 134 # Every recipe in RUST_TARGET_STAGE_N outputs to $$(TLIB$(1)_T_$(2)_H_$(3),
 135 # a directory that can be cleaned out during the middle of a run of
 136 # the get-snapshot.py script.  Therefore, every recipe needs to have
 137 # an order-only dependency either on $(SNAPSHOT_RUSTC_POST_CLEANUP) or
 138 # on $$(TSREQ$(1)_T_$(2)_H_$(3)), to ensure that no products will be
 139 # put into the target area until after the get-snapshot.py script has
 140 # had its chance to clean it out; otherwise the other products will be
 141 # inadvertently included in the clean out.
 142 SNAPSHOT_RUSTC_POST_CLEANUP=$(HBIN0_H_$(CFG_BUILD))/rustc$(X_$(CFG_BUILD))
 143
 144 define TARGET_HOST_RULES
 145
 146 $$(TBIN$(1)_T_$(2)_H_$(3))/:
 147         mkdir -p $$@
 148
 149 $$(TLIB$(1)_T_$(2)_H_$(3))/:
 150         mkdir -p $$@
 151
 152 $$(TLIB$(1)_T_$(2)_H_$(3))/%: $$(RT_OUTPUT_DIR_$(2))/% \
 153             | $$(TLIB$(1)_T_$(2)_H_$(3))/ $$(SNAPSHOT_RUSTC_POST_CLEANUP)
 154         @$$(call E, cp: $$@)
 155         $$(Q)cp $$< $$@
 156
 157 $$(TBIN$(1)_T_$(2)_H_$(3))/%: $$(CFG_LLVM_INST_DIR_$(2))/bin/% \
 158             | $$(TBIN$(1)_T_$(2)_H_$(3))/ $$(SNAPSHOT_RUSTC_POST_CLEANUP)
 159         @$$(call E, cp: $$@)
 160         $$(Q)cp $$< $$@
 161 endef
 162
 163 $(foreach source,$(CFG_HOST), \
 164  $(foreach target,$(CFG_TARGET), \
 165   $(eval $(call TARGET_HOST_RULES,0,$(target),$(source))) \
 166   $(eval $(call TARGET_HOST_RULES,1,$(target),$(source))) \
 167   $(eval $(call TARGET_HOST_RULES,2,$(target),$(source))) \
 168   $(eval $(call TARGET_HOST_RULES,3,$(target),$(source)))))
 169
 170 # In principle, each host can build each target for both libs and tools
 171 $(foreach crate,$(CRATES), \
 172  $(foreach source,$(CFG_HOST), \
 173   $(foreach target,$(CFG_TARGET), \
 174    $(eval $(call RUST_TARGET_STAGE_N,0,$(target),$(source),$(crate))) \
 175    $(eval $(call RUST_TARGET_STAGE_N,1,$(target),$(source),$(crate))) \
 176    $(eval $(call RUST_TARGET_STAGE_N,2,$(target),$(source),$(crate))) \
 177    $(eval $(call RUST_TARGET_STAGE_N,3,$(target),$(source),$(crate))))))
 178
 179 $(foreach host,$(CFG_HOST), \
 180  $(foreach target,$(CFG_TARGET), \
 181   $(foreach stage,$(STAGES), \
 182    $(foreach tool,$(TOOLS), \
 183     $(eval $(call TARGET_TOOL,$(stage),$(target),$(host),$(tool)))))))
 184
 185 # We have some triples which are bootstrapped from other triples, and this means
 186 # that we need to fixup some of the native tools that a triple depends on.
 187 #
 188 # For example, MSVC requires the llvm-ar.exe executable to manage archives, but
 189 # it bootstraps from the GNU Windows triple. This means that the compiler will
 190 # add this directory to PATH when executing new processes:
 191 #
 192 #       $SYSROOT/rustlib/x86_64-pc-windows-gnu/bin
 193 #
 194 # Unfortunately, however, the GNU triple is not known about in stage0, so the
 195 # tools are actually located in:
 196 #
 197 #       $SYSROOT/rustlib/x86_64-pc-windows-msvc/bin
 198 #
 199 # To remedy this problem, the rules below copy all native tool dependencies into
 200 # the bootstrap triple's location in stage 0 so the bootstrap compiler can find
 201 # the right sets of tools. Later stages (1+) will have the right host triple for
 202 # the compiler, so there's no need to worry there.
 203 #
 204 # $(1) - stage
 205 # $(2) - triple that's being used as host/target
 206 # $(3) - triple snapshot is built for
 207 # $(4) - crate
 208 # $(5) - tool
 209 define MOVE_TOOLS_TO_SNAPSHOT_HOST_DIR
 210 ifneq (,$(3))
 211 $$(TLIB$(1)_T_$(2)_H_$(2))/stamp.$(4): $$(HLIB$(1)_H_$(2))/rustlib/$(3)/bin/$(5)
 212
 213 $$(HLIB$(1)_H_$(2))/rustlib/$(3)/bin/$(5): $$(TBIN$(1)_T_$(2)_H_$(2))/$(5)
 214         mkdir -p $$(@D)
 215         cp $$< $$@
 216 endif
 217 endef
 218
 219 $(foreach target,$(CFG_TARGET), \
 220  $(foreach crate,$(CRATES), \
 221   $(foreach tool,$(NATIVE_TOOL_DEPS_$(crate)_T_$(target)), \
 222    $(eval $(call MOVE_TOOLS_TO_SNAPSHOT_HOST_DIR,0,$(target),$(BOOTSTRAP_FROM_$(target)),$(crate),$(tool))))))