+# i386, powerpc
+# AIX is not supported
+ArchSupportsNCG=$(strip $(patsubst $(HostArch_CPP), YES, $(findstring $(HostArch_CPP), i386 x86_64 powerpc sparc)))
+OsSupportsNCG=$(strip $(patsubst $(HostOS_CPP), YES, $(patsubst aix,,$(HostOS_CPP))))
+
+# lazy test, because $(GhcUnregisterised) might be set in build.mk later.
+GhcWithNativeCodeGen=$(strip\
+ $(if $(filter YESYESNO,\
+ $(OsSupportsNCG)$(ArchSupportsNCG)$(GhcUnregisterised)),YES,NO))
+
+HaveLibDL = @HaveLibDL@
+
+# ArchSupportsSMP should be set iff there is support for that arch in
+# includes/stg/SMP.h
+ArchSupportsSMP=$(strip $(patsubst $(HostArch_CPP), YES, $(findstring $(HostArch_CPP), i386 x86_64 sparc powerpc)))
+
+# lazy test, because $(GhcUnregisterised) might be set in build.mk later.
+GhcWithSMP=$(strip $(if $(filter YESNO, $(ArchSupportsSMP)$(GhcUnregisterised)),YES,NO))
+
+# Whether to include GHCi in the compiler. Depends on whether the RTS linker
+# has support for this OS/ARCH combination.
+
+OsSupportsGHCi=$(strip $(patsubst $(HostOS_CPP), YES, $(findstring $(HostOS_CPP), mingw32 cygwin32 linux solaris2 freebsd dragonfly netbsd openbsd darwin)))
+ArchSupportsGHCi=$(strip $(patsubst $(HostArch_CPP), YES, $(findstring $(HostArch_CPP), i386 x86_64 powerpc sparc sparc64)))
+
+ifeq "$(OsSupportsGHCi)$(ArchSupportsGHCi)" "YESYES"
+GhcWithInterpreter=YES
+else
+GhcWithInterpreter=NO
+endif
+
+# GhcEnableTablesNextToCode tells us whether the target architecture
+# supports placing info tables directly before the entry code
+# (see TABLES_NEXT_TO_CODE in the RTS). Whether we actually compile for
+# TABLES_NEXT_TO_CODE depends on whether we're building unregisterised
+# code or not, which may be decided by options to the compiler later.
+ifneq "$(findstring $(TargetArch_CPP)X, ia64X powerpc64X)" ""
+GhcEnableTablesNextToCode=NO
+else
+GhcEnableTablesNextToCode=YES
+endif
+
+# Whether to use libffi for adjustors (foreign import "wrapper") or
+# not. If we have built-in support (rts/Adjustor.c) then we use that,
+# otherwise we fall back on libffi, which is slightly slower.
+ArchHasAdjustorSupport=$(strip $(if $(findstring $(HostArch_CPP),i386 x86_64 alpha powerpc ia64,),YES,NO))
+ifeq "$(ArchHasAdjustorSupport)" "YES"
+UseLibFFIForAdjustors=NO
+else
+UseLibFFIForAdjustors=YES
+endif
+
+# On Windows we normally want to make a relocatable bindist, to we
+# ignore flags like libdir
+ifeq "$(Windows)" "YES"
+RelocatableBuild = YES
+else
+RelocatableBuild = NO
+endif
+
+# needs to be after $(RelocatableBuild) is set above
+include $(TOP)/mk/install.mk
+
+# When building bindists we set this to yes so that the binaries are as
+# portable as possible.
+BeConservative = NO