+
+ifneq "$(findstring 3.7, $(MAKE_VERSION))" ""
+ifeq "$(findstring 3.79.1, $(MAKE_VERSION))" ""
+$(error GNU make version 3.79.1 or later is required.)
+endif
+endif
+
+################################################################################
+#
+# Layout of the source tree
+#
+################################################################################
+
+# Here we provide defines for the various directories in the source tree,
+# so we can move things around more easily. A define $(GHC_FOO_DIR)
+# indicates a directory relative to the top of the source tree.
+
+GHC_UTILS_DIR = utils
+GHC_INCLUDE_DIR = includes
+GHC_COMPILER_DIR = compiler
+GHC_PROG_DIR = ghc
+GHC_RTS_DIR = rts
+GHC_DRIVER_DIR = driver
+GHC_COMPAT_DIR = compat
+
+GHC_MKDEPENDC_DIR = $(GHC_UTILS_DIR)/mkdependC
+GHC_LTX_DIR = $(GHC_UTILS_DIR)/ltx
+GHC_LNDIR_DIR = $(GHC_UTILS_DIR)/lndir
+GHC_MKDIRHIER_DIR = $(GHC_UTILS_DIR)/mkdirhier
+GHC_DOCBOOK_DIR = $(GHC_UTILS_DIR)/docbook
+GHC_UNLIT_DIR = $(GHC_UTILS_DIR)/unlit
+GHC_HP2PS_DIR = $(GHC_UTILS_DIR)/hp2ps
+GHC_GHCTAGS_DIR = $(GHC_UTILS_DIR)/ghctags
+GHC_HSC2HS_DIR = $(GHC_UTILS_DIR)/hsc2hs
+GHC_TOUCHY_DIR = $(GHC_UTILS_DIR)/touchy
+GHC_PKG_DIR = $(GHC_UTILS_DIR)/ghc-pkg
+GHC_GENPRIMOP_DIR = $(GHC_UTILS_DIR)/genprimopcode
+GHC_GENAPPLY_DIR = $(GHC_UTILS_DIR)/genapply
+GHC_CABAL_DIR = $(GHC_UTILS_DIR)/ghc-cabal
+GHC_MANGLER_DIR = $(GHC_DRIVER_DIR)/mangler
+GHC_SPLIT_DIR = $(GHC_DRIVER_DIR)/split
+GHC_SYSMAN_DIR = $(GHC_RTS_DIR)/parallel
+
+INPLACE = inplace
+INPLACE_BIN = $(INPLACE)/bin
+INPLACE_LIB = $(INPLACE)/lib
+INPLACE_MINGW = $(INPLACE)/mingw
+
+RM = rm -f
+