auto merge of #10731 : chris-morgan/rust/fix-double-slashing, r=metajack

CFG_BUILD_DIR, CFG_LLVM_SRC_DIR and CFG_SRC_DIR all have trailing
slashes, by definition, so this is correct.

(This is purely cosmetic; the doubled slash is ignored by all the tools we're using.)

Author: bors

configure

@@ -607,7 +607,7 @@ CFG_PREFIX=${CFG_PREFIX%/}
 CFG_MANDIR=${CFG_MANDIR%/}
 CFG_HOST="$(echo $CFG_HOST | tr ',' ' ')"
 CFG_TARGET="$(echo $CFG_TARGET | tr ',' ' ')"
-CFG_SUPPORTED_TARGET="$(grep ^CC_*=* $CFG_SRC_DIR/mk/platform.mk | sed -e 's/^CC_//' -e 's/\([^=]*\).*/\1/' | xargs)"
+CFG_SUPPORTED_TARGET="$(grep ^CC_*=* ${CFG_SRC_DIR}mk/platform.mk | sed -e 's/^CC_//' -e 's/\([^=]*\).*/\1/' | xargs)"
 
 # copy host-triples to target-triples so that hosts are a subset of targets
 V_TEMP=""

mk/llvm.mk

@@ -14,8 +14,8 @@ LLVM_DEPS := $(S)/.gitmodules
 else
 
 # This is just a rough approximation of LLVM deps
-LLVM_DEPS_SRC=$(call rwildcard,$(CFG_LLVM_SRC_DIR)/lib,*cpp *hpp)
-LLVM_DEPS_INC=$(call rwildcard,$(CFG_LLVM_SRC_DIR)/include,*cpp *hpp)
+LLVM_DEPS_SRC=$(call rwildcard,$(CFG_LLVM_SRC_DIR)lib,*cpp *hpp)
+LLVM_DEPS_INC=$(call rwildcard,$(CFG_LLVM_SRC_DIR)include,*cpp *hpp)
 LLVM_DEPS=$(LLVM_DEPS_SRC) $(LLVM_DEPS_INC)
 endif
 

mk/tests.mk

@@ -98,7 +98,7 @@ ifdef CFG_UNIXY_$(1)
 endif
 
 ifdef CFG_WINDOWSY_$(1)
-  CFG_TESTLIB_$(1)=$$(CFG_BUILD_DIR)/$$(2)/$$(strip \
+  CFG_TESTLIB_$(1)=$$(CFG_BUILD_DIR)$$(2)/$$(strip \
    $$(if $$(findstring stage0,$$(1)), \
        stage0/$$(CFG_LIBDIR), \
       $$(if $$(findstring stage1,$$(1)), \