Add support for building with a static libstd for testing static crate support.

Makefile.in

@@ -49,6 +49,12 @@ CFG_RUSTLLVM :=$(call CFG_LIB_NAME,rustllvm)
 CFG_STDLIB :=$(call CFG_LIB_NAME,std)
 CFG_LIBRUSTC :=$(call CFG_LIB_NAME,rustc)
 
+ifdef CFG_DISABLE_SHAREDSTD
+  CFG_STDLIB_DEFAULT := lib/libstd.rlib
+else
+  CFG_STDLIB_DEFAULT := $(CFG_STDLIB)
+endif
+
 # version-string calculation
 CFG_GIT_DIR := $(CFG_SRC_DIR).git
 CFG_VERSION = prerelease
@@ -156,15 +162,26 @@ LLC := $(CFG_LLVM_BINDIR)/llc$(X)
 ######################################################################
 
 define SREQ
+ifdef CFG_DISABLE_SHAREDSTD
+SREQ$(1) = stage$(1)/rustc$(X)          \
+           stage$(1)/$$(CFG_RUNTIME)     \
+           stage$(1)/$$(CFG_STDLIB_DEFAULT)  \
+           stage$(1)/$$(CFG_RUSTLLVM)    \
+           stage$(1)/lib/glue.o          \
+           stage$(1)/lib/main.o          \
+           stage$(1)/lib/$$(CFG_RUNTIME) \
+           $$(MKFILES)
+else
 SREQ$(1) = stage$(1)/rustc$(X)          \
            stage$(1)/$$(CFG_RUNTIME)     \
-           stage$(1)/$$(CFG_STDLIB)      \
+           stage$(1)/$$(CFG_STDLIB_DEFAULT)  \
            stage$(1)/$$(CFG_RUSTLLVM)    \
            stage$(1)/lib/glue.o          \
            stage$(1)/lib/main.o          \
            stage$(1)/lib/$$(CFG_RUNTIME) \
            stage$(1)/lib/$$(CFG_STDLIB)  \
            $$(MKFILES)
+endif
 
 STAGE$(1) := $$(Q)$$(call CFG_RUN_TARG,stage$(1),stage$(1), \
                 $$(CFG_VALGRIND_COMPILE) stage$(1)/rustc$$(X) \

configure

@@ -162,6 +162,7 @@ else
     step_msg "processing $CFG_SELF args"
 fi
 
+opt sharedstd 1 "build libstd as a shared library"
 opt valgrind 1 "run tests with valgrind"
 opt docs     1 "build documentation"
 opt optimize 1 "build optimized rust code"

mk/stage0.mk

@@ -33,3 +33,6 @@ stage0/lib/$(CFG_RUNTIME): stage0/rustc$(X)
 
 stage0/lib/$(CFG_STDLIB): stage0/rustc$(X)
 	$(Q)touch $@
+
+stage0/lib/libstd.rlib: stage0/rustc$(X)
+	$(Q)touch $@

mk/stageN.mk

@@ -23,7 +23,7 @@ stage$(2)/%.o: stage$(2)/%.s
 
 stage$(2)/rustc$$(X): $$(COMPILER_CRATE) $$(COMPILER_INPUTS) \
                       stage$(2)/$$(CFG_RUNTIME)              \
-                      stage$(2)/$$(CFG_STDLIB)               \
+                      stage$(1)/$$(CFG_STDLIB_DEFAULT)       \
                       stage$(2)/$$(CFG_RUSTLLVM)             \
                       $$(SREQ$(1))
 	@$$(call E, compile_and_link: $$@)