DEFAULT_TMPDIR = /C/TEMP
endif
-# FPTOOLS_TOP: the top of the fptools hierarchy, absolute path.
+# FPTOOLS_TOP_ABS: the top of the fptools hierarchy, absolute path.
# On Windows this is a c:/foo/bar style path.
FPTOOLS_TOP_ABS = @hardtop@
HC = @WithHc@
MKDEPENDHS = $(GHC)
-BOOTSTRAPPING_PACKAGE_CONF_HC_OPTS = -package-conf $(BOOTSTRAPPING_CONF)
-BOOTSTRAPPING_PACKAGE_CONF_MKDEPENDHS_OPTS = -package-conf $(BOOTSTRAPPING_CONF)
GhcVersion = @GhcVersion@
GhcPatchLevel = @GhcPatchLevel@
GhcMajVersion = @GhcMajVersion@
GhcMinVersion = @GhcMinVersion@
+# We build a few packages using the installed GHC as part of the
+# bootstrapping process. These are installed into a local
+# package.conf file, $(BOOTSTRAPPING_CONF). When we invoke the
+# installed GHC we need to pass it -package-conf $(BOOTSTRAPPING_CONF).
+# So the following variables expand to -package-conf $(BOOTSTRAPPING_CONF)
+# when $(HC) does *not* point to one of the GHC binaries built in
+# the local tree.
+#
+BOOTSTRAPPING_PACKAGE_CONF_HC_OPTS =$(if $(findstring $(GHC_COMPILER_DIR_ABS), $(HC)),,-package-conf $(BOOTSTRAPPING_CONF))
+BOOTSTRAPPING_PACKAGE_CONF_MKDEPENDHS_OPTS =$(if $(findstring $(GHC_COMPILER_DIR_ABS), $(MKDEPENDHS)),,-package-conf $(BOOTSTRAPPING_CONF))
+
# Some useful GHC version predicates:
ghc_ge_605 = @ghc_ge_605@
ghc_ge_607 = @ghc_ge_607@