Refactor how dependencies are included; fixes #5109

[ghc-hetmet.git] / rules / dependencies.mk

diff --git a/rules/dependencies.mk b/rules/dependencies.mk
new file mode 100644 (file)
index 0000000..42605a5
--- /dev/null
+++ b/rules/dependencies.mk
@@ -0,0 +1,38 @@
+# -----------------------------------------------------------------------------
+#
+# (c) 2009 The University of Glasgow
+#
+# This file is part of the GHC build system.
+#
+# To understand how the build system works and how to modify it, see
+#      http://hackage.haskell.org/trac/ghc/wiki/Building/Architecture
+#      http://hackage.haskell.org/trac/ghc/wiki/Building/Modifying
+#
+# -----------------------------------------------------------------------------
+
+define dependencies
+$(call trace, dependencies($1,$2,$3))
+$(call profStart, dependencies($1,$2,$3))
+# $1 = dir
+# $2 = distdir
+# $3 = GHC stage to use (0 == bootstrapping compiler)
+
+# We always have the dependency rules available, as we need to know
+# how to build hsc2hs's dependency file in phase 0
+$(call build-dependencies,$1,$2,$3)
+
+ifneq "$(phase)" "0"
+# From phase 1 we actually include the dependency files for the
+# bootstrapping stuff
+ifeq "$3" "0"
+$(call include-dependencies,$1,$2,$3)
+else ifeq "$(phase)" "final"
+# In the final phase, we also include the dependency files for
+# everything else
+$(call include-dependencies,$1,$2,$3)
+endif
+endif
+
+$(call profEnd, dependencies($1,$2,$3))
+endef
+