Move the `rt` build directory under $target

Closes #2302

5 files changed, 45 insertions, 41 deletions

diff --git a/configure b/configure
index de6256057e0..fff961b734c 100755
--- a/configure
+++ b/configure
@@ -674,20 +674,19 @@ do
     make_dir $t/rustllvm
 done
 
-make_dir rt
 for t in $CFG_TARGET_TRIPLES
 do
-  make_dir rt/$t
+  make_dir $t/rt
   for s in 0 1 2 3
   do
-    make_dir rt/$t/stage$s
+    make_dir $t/rt/stage$s
     for i in                                          \
       isaac linenoise sync test \
       arch/i386 arch/x86_64 arch/arm arch/mips  \
       libuv libuv/src/ares libuv/src/eio libuv/src/ev \
       jemalloc
     do
-      make_dir rt/$t/stage$s/$i
+      make_dir $t/rt/stage$s/$i
     done
   done
 done
diff --git a/mk/clean.mk b/mk/clean.mk
index 5eefa5395b4..f38396cafff 100644
--- a/mk/clean.mk
+++ b/mk/clean.mk
@@ -33,7 +33,9 @@ clean: clean-misc $(CLEAN_STAGE_RULES)
 
 clean-misc:
 	@$(call E, cleaning)
-	$(Q)find $(CFG_BUILD_TRIPLE)/rustllvm rt $(CFG_BUILD_TRIPLE)/test \
+	$(Q)find $(CFG_BUILD_TRIPLE)/rustllvm \
+	         $(CFG_BUILD_TRIPLE)/rt \
+		 $(CFG_BUILD_TRIPLE)/test \
          -name '*.[odasS]' -o \
          -name '*.so' -o      \
          -name '*.dylib' -o   \
@@ -41,7 +43,7 @@ clean-misc:
          -name '*.def' -o     \
          -name '*.bc'         \
          | xargs rm -f
-	$(Q)find rustllvm rt $(CFG_BUILD_TRIPLE)\
+	$(Q)find $(CFG_BUILD_TRIPLE)\
          -name '*.dSYM'       \
          | xargs rm -Rf
 	$(Q)rm -f $(RUNTIME_OBJS) $(RUNTIME_DEF)
diff --git a/mk/rt.mk b/mk/rt.mk
index c260945cbc9..cfa26b8e97c 100644
--- a/mk/rt.mk
+++ b/mk/rt.mk
@@ -92,61 +92,64 @@ RUNTIME_S_$(1)_$(2) := rt/arch/$$(HOST_$(1))/_context.S \
 			rt/arch/$$(HOST_$(1))/ccall.S \
 			rt/arch/$$(HOST_$(1))/record_sp.S
 
+RT_OUTPUT_DIR_$(1) := $(1)/rt
+RT_BUILD_DIR_$(1)_$(2) := $$(RT_OUTPUT_DIR_$(1))/stage$(2)
+
 ifeq ($$(CFG_WINDOWSY_$(1)), 1)
   LIBUV_OSTYPE_$(1)_$(2) := win
-  LIBUV_LIB_$(1)_$(2) := rt/$(1)/stage$(2)/libuv/libuv.a
-  JEMALLOC_LIB_$(1)_$(2) := rt/$(1)/stage$(2)/jemalloc/lib/jemalloc.lib
+  LIBUV_LIB_$(1)_$(2) := $$(RT_BUILD_DIR_$(1)_$(2))/libuv/libuv.a
+  JEMALLOC_LIB_$(1)_$(2) := $$(RT_BUILD_DIR_$(1)_$(2))/jemalloc/lib/jemalloc.lib
 else ifeq ($(OSTYPE_$(1)), apple-darwin)
   LIBUV_OSTYPE_$(1)_$(2) := mac
-  LIBUV_LIB_$(1)_$(2) := rt/$(1)/stage$(2)/libuv/libuv.a
-  JEMALLOC_LIB_$(1)_$(2) := rt/$(1)/stage$(2)/jemalloc/lib/libjemalloc_pic.a
+  LIBUV_LIB_$(1)_$(2) := $$(RT_BUILD_DIR_$(1)_$(2))/libuv/libuv.a
+  JEMALLOC_LIB_$(1)_$(2) := $$(RT_BUILD_DIR_$(1)_$(2))/jemalloc/lib/libjemalloc_pic.a
 else ifeq ($(OSTYPE_$(1)), unknown-freebsd)
   LIBUV_OSTYPE_$(1)_$(2) := unix/freebsd
-  LIBUV_LIB_$(1)_$(2) := rt/$(1)/stage$(2)/libuv/libuv.a
-  JEMALLOC_LIB_$(1)_$(2) := rt/$(1)/stage$(2)/jemalloc/lib/libjemalloc_pic.a
+  LIBUV_LIB_$(1)_$(2) := $$(RT_BUILD_DIR_$(1)_$(2))/libuv/libuv.a
+  JEMALLOC_LIB_$(1)_$(2) := $$(RT_BUILD_DIR_$(1)_$(2))/jemalloc/lib/libjemalloc_pic.a
 else ifeq ($(OSTYPE_$(1)), linux-androideabi)
   LIBUV_OSTYPE_$(1)_$(2) := unix/android
-  LIBUV_LIB_$(1)_$(2) := rt/$(1)/stage$(2)/libuv/libuv.a
-  JEMALLOC_LIB_$(1)_$(2) := rt/$(1)/stage$(2)/jemalloc/lib/libjemalloc_pic.a
+  LIBUV_LIB_$(1)_$(2) := $$(RT_BUILD_DIR_$(1)_$(2))/libuv/libuv.a
+  JEMALLOC_LIB_$(1)_$(2) := $$(RT_BUILD_DIR_$(1)_$(2))/jemalloc/lib/libjemalloc_pic.a
 else
   LIBUV_OSTYPE_$(1)_$(2) := unix/linux
-  LIBUV_LIB_$(1)_$(2) := rt/$(1)/stage$(2)/libuv/libuv.a
-  JEMALLOC_LIB_$(1)_$(2) := rt/$(1)/stage$(2)/jemalloc/lib/libjemalloc_pic.a
+  LIBUV_LIB_$(1)_$(2) := $$(RT_BUILD_DIR_$(1)_$(2))/libuv/libuv.a
+  JEMALLOC_LIB_$(1)_$(2) := $$(RT_BUILD_DIR_$(1)_$(2))/jemalloc/lib/libjemalloc_pic.a
 endif
 
-RUNTIME_DEF_$(1)_$(2) := rt/rustrt$(CFG_DEF_SUFFIX_$(1))
+RUNTIME_DEF_$(1)_$(2) := $$(RT_OUTPUT_DIR_$(1))/rustrt$$(CFG_DEF_SUFFIX_$(1))
 RUNTIME_INCS_$(1)_$(2) := -I $$(S)src/rt -I $$(S)src/rt/isaac -I $$(S)src/rt/uthash \
                      -I $$(S)src/rt/arch/$$(HOST_$(1)) \
                      -I $$(S)src/rt/linenoise \
                      -I $$(S)src/libuv/include
-RUNTIME_OBJS_$(1)_$(2) := $$(RUNTIME_CXXS_$(1)_$(2):rt/%.cpp=rt/$(1)/stage$(2)/%.o) \
-                     $$(RUNTIME_CS_$(1)_$(2):rt/%.c=rt/$(1)/stage$(2)/%.o) \
-                     $$(RUNTIME_S_$(1)_$(2):rt/%.S=rt/$(1)/stage$(2)/%.o)
+RUNTIME_OBJS_$(1)_$(2) := $$(RUNTIME_CXXS_$(1)_$(2):rt/%.cpp=$$(RT_BUILD_DIR_$(1)_$(2))/%.o) \
+                     $$(RUNTIME_CS_$(1)_$(2):rt/%.c=$$(RT_BUILD_DIR_$(1)_$(2))/%.o) \
+                     $$(RUNTIME_S_$(1)_$(2):rt/%.S=$$(RT_BUILD_DIR_$(1)_$(2))/%.o)
 ALL_OBJ_FILES += $$(RUNTIME_OBJS_$(1)_$(2))
 
-MORESTACK_OBJ_$(1)_$(2) := rt/$(1)/stage$(2)/arch/$$(HOST_$(1))/morestack.o
+MORESTACK_OBJ_$(1)_$(2) := $$(RT_BUILD_DIR_$(1)_$(2))/arch/$$(HOST_$(1))/morestack.o
 ALL_OBJ_FILES += $$(MORESTACK_OBJS_$(1)_$(2))
 
-rt/$(1)/stage$(2)/%.o: rt/%.cpp $$(MKFILE_DEPS)
+$$(RT_BUILD_DIR_$(1)_$(2))/%.o: rt/%.cpp $$(MKFILE_DEPS)
 	@$$(call E, compile: $$@)
 	$$(Q)$$(call CFG_COMPILE_CXX_$(1), $$@, $$(RUNTIME_INCS_$(1)_$(2)) \
                  $$(SNAP_DEFINES) $$(RUNTIME_CXXFLAGS_$(1)_$(2))) $$<
 
-rt/$(1)/stage$(2)/%.o: rt/%.c $$(MKFILE_DEPS)
+$$(RT_BUILD_DIR_$(1)_$(2))/%.o: rt/%.c $$(MKFILE_DEPS)
 	@$$(call E, compile: $$@)
 	$$(Q)$$(call CFG_COMPILE_C_$(1), $$@, $$(RUNTIME_INCS_$(1)_$(2)) \
                  $$(SNAP_DEFINES) $$(RUNTIME_CFLAGS_$(1)_$(2))) $$<
 
-rt/$(1)/stage$(2)/%.o: rt/%.S  $$(MKFILE_DEPS) \
+$$(RT_BUILD_DIR_$(1)_$(2))/%.o: rt/%.S  $$(MKFILE_DEPS) \
                      $$(LLVM_CONFIG_$$(CFG_BUILD_TRIPLE))
 	@$$(call E, compile: $$@)
 	$$(Q)$$(call CFG_ASSEMBLE_$(1),$$@,$$<)
 
-rt/$(1)/stage$(2)/arch/$$(HOST_$(1))/libmorestack.a: $$(MORESTACK_OBJ_$(1)_$(2))
+$$(RT_BUILD_DIR_$(1)_$(2))/arch/$$(HOST_$(1))/libmorestack.a: $$(MORESTACK_OBJ_$(1)_$(2))
 	@$$(call E, link: $$@)
 	$$(Q)$(AR_$(1)) rcs $$@ $$<
 
-rt/$(1)/stage$(2)/$(CFG_RUNTIME_$(1)): $$(RUNTIME_OBJS_$(1)_$(2)) $$(MKFILE_DEPS) \
+$$(RT_BUILD_DIR_$(1)_$(2))/$(CFG_RUNTIME_$(1)): $$(RUNTIME_OBJS_$(1)_$(2)) $$(MKFILE_DEPS) \
                         $$(RUNTIME_DEF_$(1)_$(2)) $$(LIBUV_LIB_$(1)_$(2)) $$(JEMALLOC_LIB_$(1)_$(2))
 	@$$(call E, link: $$@)
 	$$(Q)$$(call CFG_LINK_CXX_$(1),$$@, $$(RUNTIME_OBJS_$(1)_$(2)) \
@@ -172,7 +175,7 @@ endif
 ifdef CFG_WINDOWSY_$(1)
 $$(LIBUV_LIB_$(1)_$(2)): $$(LIBUV_DEPS)
 	$$(Q)$$(MAKE) -C $$(S)src/libuv/ \
-		builddir_name="$$(CFG_BUILD_DIR)/rt/$(1)/stage$(2)/libuv" \
+		builddir_name="$$(CFG_BUILD_DIR)/$$(RT_BUILD_DIR_$(1)_$(2))/libuv" \
 		OS=mingw \
 		V=$$(VERBOSE)
 else ifeq ($(OSTYPE_$(1)), linux-androideabi)
@@ -186,7 +189,7 @@ $$(LIBUV_LIB_$(1)_$(2)): $$(LIBUV_DEPS)
 		AR="$$(AR_$(1))" \
 		PLATFORM=android \
 		BUILDTYPE=Release \
-		builddir_name="$$(CFG_BUILD_DIR)/rt/$(1)/stage$(2)/libuv" \
+		builddir_name="$$(CFG_BUILD_DIR)/$$(RT_BUILD_DIR_$(1)_$(2))/libuv" \
 		host=android OS=linux \
 		V=$$(VERBOSE)
 else
@@ -197,59 +200,59 @@ $$(LIBUV_LIB_$(1)_$(2)): $$(LIBUV_DEPS)
 		CC="$$(CC_$(1))" \
 		CXX="$$(CXX_$(1))" \
 		AR="$$(AR_$(1))" \
-		builddir_name="$$(CFG_BUILD_DIR)/rt/$(1)/stage$(2)/libuv" \
+		builddir_name="$$(CFG_BUILD_DIR)/$$(RT_BUILD_DIR_$(1)_$(2))/libuv" \
 		V=$$(VERBOSE)
 endif
 
 ifeq ($(OSTYPE_$(1)), linux-androideabi)
 $$(JEMALLOC_LIB_$(1)_$(2)):
-	cd $$(CFG_BUILD_DIR)/rt/$(1)/stage$(2)/jemalloc; $(S)src/rt/jemalloc/configure \
+	cd $$(RT_BUILD_DIR_$(1)_$(2))/jemalloc; $(S)src/rt/jemalloc/configure \
 		--disable-experimental --build=$(CFG_BUILD_TRIPLE) --host=$(1) --disable-tls \
 		EXTRA_CFLAGS="$$(CFG_GCCISH_CFLAGS) $$(LIBUV_FLAGS_$$(HOST_$(1))) $$(SNAP_DEFINES)" \
 		LDFLAGS="$$(CFG_GCCISH_LINK_FLAGS) $$(LIBUV_FLAGS_$$(HOST_$(1)))" \
 		CC="$$(CC_$(1))" \
 		CXX="$$(CXX_$(1))" \
 		AR="$$(AR_$(1))"
-	$$(Q)$$(MAKE) -C $$(CFG_BUILD_DIR)/rt/$(1)/stage$(2)/jemalloc
+	$$(Q)$$(MAKE) -C $$(RT_BUILD_DIR_$(1)_$(2))/jemalloc
 else
 $$(JEMALLOC_LIB_$(1)_$(2)):
-	cd $$(CFG_BUILD_DIR)/rt/$(1)/stage$(2)/jemalloc; $(S)src/rt/jemalloc/configure \
+	cd $$(RT_BUILD_DIR_$(1)_$(2))/jemalloc; $(S)src/rt/jemalloc/configure \
 		--disable-experimental --build=$(CFG_BUILD_TRIPLE) --host=$(1) \
 		EXTRA_CFLAGS="$$(CFG_GCCISH_CFLAGS) $$(LIBUV_FLAGS_$$(HOST_$(1))) $$(SNAP_DEFINES)" \
 		LDFLAGS="$$(CFG_GCCISH_LINK_FLAGS) $$(LIBUV_FLAGS_$$(HOST_$(1)))" \
 		CC="$$(CC_$(1))" \
 		CXX="$$(CXX_$(1))" \
 		AR="$$(AR_$(1))"
-	$$(Q)$$(MAKE) -C $$(CFG_BUILD_DIR)/rt/$(1)/stage$(2)/jemalloc
+	$$(Q)$$(MAKE) -C $$(RT_BUILD_DIR_$(1)_$(2))/jemalloc
 endif
 
 
 # These could go in rt.mk or rustllvm.mk, they're needed for both.
 
 # This regexp has a single $, escaped twice
-%.bsd.def:    %.def.in $$(MKFILE_DEPS)
+$(1)/%.bsd.def:    %.def.in $$(MKFILE_DEPS)
 	@$$(call E, def: $$@)
 	$$(Q)echo "{" > $$@
 	$$(Q)sed 's/.$$$$/&;/' $$< >> $$@
 	$$(Q)echo "};" >> $$@
 
-%.linux.def:    %.def.in $$(MKFILE_DEPS)
+$(1)/%.linux.def:    %.def.in $$(MKFILE_DEPS)
 	@$$(call E, def: $$@)
 	$$(Q)echo "{" > $$@
 	$$(Q)sed 's/.$$$$/&;/' $$< >> $$@
 	$$(Q)echo "};" >> $$@
 
-%.darwin.def:	%.def.in $$(MKFILE_DEPS)
+$(1)/%.darwin.def:	%.def.in $$(MKFILE_DEPS)
 	@$$(call E, def: $$@)
 	$$(Q)sed 's/^./_&/' $$< > $$@
 
-%.android.def:  %.def.in $$(MKFILE_DEPS)
+$(1)/%.android.def:  %.def.in $$(MKFILE_DEPS)
 	@$$(call E, def: $$@)
 	$$(Q)echo "{" > $$@
 	$$(Q)sed 's/.$$$$/&;/' $$< >> $$@
 	$$(Q)echo "};" >> $$@
 
-%.mingw32.def:	%.def.in $$(MKFILE_DEPS)
+$(1)/%.mingw32.def:	%.def.in $$(MKFILE_DEPS)
 	@$$(call E, def: $$@)
 	$$(Q)echo LIBRARY $$* > $$@
 	$$(Q)echo EXPORTS >> $$@
diff --git a/mk/rustllvm.mk b/mk/rustllvm.mk
index d2f993855af..8c3bf4e05b9 100644
--- a/mk/rustllvm.mk
+++ b/mk/rustllvm.mk
@@ -24,7 +24,7 @@ endif
 
 RUSTLLVM_OBJS_CS_$(1) := $$(addprefix rustllvm/, RustWrapper.cpp PassWrapper.cpp)
 
-RUSTLLVM_DEF_$(1) := rustllvm/rustllvm$(CFG_DEF_SUFFIX_$(1))
+RUSTLLVM_DEF_$(1) := $(1)/rustllvm/rustllvm$(CFG_DEF_SUFFIX_$(1))
 
 RUSTLLVM_INCS_$(1) = $$(LLVM_EXTRA_INCDIRS_$(1)) \
                      -iquote $$(LLVM_INCDIR_$(1)) \
diff --git a/mk/target.mk b/mk/target.mk
index 7cd442ccb4d..e540d856ecd 100644
--- a/mk/target.mk
+++ b/mk/target.mk
@@ -39,14 +39,14 @@ WFLAGS_ST2 = -D warnings
 define TARGET_STAGE_N
 
 $$(TLIB$(1)_T_$(2)_H_$(3))/libmorestack.a: \
-		rt/$(2)/stage$(1)/arch/$$(HOST_$(2))/libmorestack.a \
+		$(2)/rt/stage$(1)/arch/$$(HOST_$(2))/libmorestack.a \
 		| $$(TLIB$(1)_T_$(2)_H_$(3))/ \
 		  $(SNAPSHOT_RUSTC_POST_CLEANUP)
 	@$$(call E, cp: $$@)
 	$$(Q)cp $$< $$@
 
 $$(TLIB$(1)_T_$(2)_H_$(3))/$(CFG_RUNTIME_$(2)): \
-		rt/$(2)/stage$(1)/$(CFG_RUNTIME_$(2)) \
+		$(2)/rt/stage$(1)/$(CFG_RUNTIME_$(2)) \
 		| $$(TLIB$(1)_T_$(2)_H_$(3))/ \
 		  $(SNAPSHOT_RUSTC_POST_CLEANUP)
 	@$$(call E, cp: $$@)