1 files changed, 55 insertions, 0 deletions

diff --git a/Makefile b/Makefile
new file mode 100644
index 0000000..ac8dba0
--- /dev/null
+++ b/Makefile
@@ -0,0 +1,55 @@
+# Default target
+all: Makefile.coq
+        +@$(MAKE) -f Makefile.coq all
+.PHONY: all
+
+# Permit local customization
+-include Makefile.local
+
+# Forward most targets to Coq makefile (with some trick to make this phony)
+%: Makefile.coq phony
+        @#echo "Forwarding $@"
+        +@$(MAKE) -f Makefile.coq $@
+phony: ;
+.PHONY: phony
+
+clean: Makefile.coq
+        +@$(MAKE) -f Makefile.coq clean
+        @# Make sure not to enter the `_opam` folder.
+        find [a-z]*/ \( -name "*.d" -o -name "*.vo" -o -name "*.vo[sk]" -o -name "*.aux" -o -name "*.cache" -o -name "*.glob" -o -name "*.vio" \) -print -delete || true
+        rm -f Makefile.coq .lia.cache builddep/*
+.PHONY: clean
+
+# Create Coq Makefile.
+Makefile.coq: _CoqProject Makefile
+        "$(COQBIN)coq_makefile" -f _CoqProject -o Makefile.coq $(EXTRA_COQFILES)
+
+# Install build-dependencies
+OPAMFILES=$(wildcard *.opam)
+BUILDDEPFILES=$(addsuffix -builddep.opam, $(addprefix builddep/,$(basename $(OPAMFILES))))
+
+builddep/%-builddep.opam: %.opam Makefile
+        @echo "# Creating builddep package for $<."
+        @mkdir -p builddep
+        @sed <$< -E 's/^(build|install|remove):.*/\1: []/; s/"(.*)"(.*= *version.*)$$/"\1-builddep"\2/;' >$@
+
+builddep-opamfiles: $(BUILDDEPFILES)
+.PHONY: builddep-opamfiles
+
+builddep: builddep-opamfiles
+        @# We want opam to not just install the build-deps now, but to also keep satisfying these
+        @# constraints.  Otherwise, `opam upgrade` may well update some packages to versions
+        @# that are incompatible with our build requirements.
+        @# To achieve this, we create a fake opam package that has our build-dependencies as
+        @# dependencies, but does not actually install anything itself.
+        @echo "# Installing builddep packages."
+        @opam install $(OPAMFLAGS) $(BUILDDEPFILES)
+.PHONY: builddep
+
+# Backwards compatibility target
+build-dep: builddep
+.PHONY: build-dep
+
+# Some files that do *not* need to be forwarded to Makefile.coq.
+# ("::" lets Makefile.local overwrite this.)
+Makefile Makefile.local _CoqProject $(OPAMFILES):: ;