Based on Christian Lindig's work.

Initially this will be used to build unit tests, and to make development
easier.

Dune supports proper incremental builds and editor integration with
merlin/LSP.

For now the Makefile based build system is retained too: this is not a
hard dependency on Dune.

Using version 2.1 of Dune build language here, because that is the one
available in Ubuntu Focal (part of the CI here).

No functional change.

Signed-off-by: Edwin Török <[email protected]>
---
 tools/.gitignore               |  7 +++++
 tools/dune                     |  5 ++++
 tools/dune-project             |  1 +
 tools/ocaml/dune-project       | 27 ++++++++++++++++++
 tools/ocaml/libs/eventchn/dune | 11 ++++++++
 tools/ocaml/libs/mmap/dune     |  9 ++++++
 tools/ocaml/libs/xb/dune       | 10 +++++++
 tools/ocaml/libs/xc/dune       | 16 +++++++++++
 tools/ocaml/libs/xs/dune       | 15 ++++++++++
 tools/ocaml/xenstored/dune     | 51 ++++++++++++++++++++++++++++++++++
 10 files changed, 152 insertions(+)
 create mode 100644 tools/.gitignore
 create mode 100644 tools/dune
 create mode 100644 tools/dune-project
 create mode 100644 tools/ocaml/dune-project
 create mode 100644 tools/ocaml/libs/eventchn/dune
 create mode 100644 tools/ocaml/libs/mmap/dune
 create mode 100644 tools/ocaml/libs/xb/dune
 create mode 100644 tools/ocaml/libs/xc/dune
 create mode 100644 tools/ocaml/libs/xs/dune
 create mode 100644 tools/ocaml/xenstored/dune

diff --git a/tools/.gitignore b/tools/.gitignore
new file mode 100644
index 0000000000..c211749a3b
--- /dev/null
+++ b/tools/.gitignore
@@ -0,0 +1,7 @@
+dune-workspace*
+_build/
+.merlin
+*.h.gch
+*.opam
+ocaml/*.install
+include/_xentoolcore_list.h
diff --git a/tools/dune b/tools/dune
new file mode 100644
index 0000000000..febbd078f0
--- /dev/null
+++ b/tools/dune
@@ -0,0 +1,5 @@
+; only look inside ocaml and include subdirectory, speeds up the build
+; since dune doesn't need to copy/hash/monitor all the other files
+(dirs ocaml)
+
+(data_only_dirs include libs)
diff --git a/tools/dune-project b/tools/dune-project
new file mode 100644
index 0000000000..cd8d4e3d86
--- /dev/null
+++ b/tools/dune-project
@@ -0,0 +1 @@
+(lang dune 2.1)
diff --git a/tools/ocaml/dune-project b/tools/ocaml/dune-project
new file mode 100644
index 0000000000..1dae7b0acb
--- /dev/null
+++ b/tools/ocaml/dune-project
@@ -0,0 +1,27 @@
+(lang dune 2.1)
+
+(name xen)
+
+(formatting (enabled_for dune))
+(generate_opam_files true)
+
+(maintainers [email protected])
+(license LGPL)
+
+(package
+ (name xen)
+ (synopsis "Xen interfaces")
+ (depends
+  base-unix
+  (dune (>= 2.1))
+ )
+)
+
+(package
+ (name xenstored)
+ (synopsis "In-memory key-value store for the Xen hypervisor")
+ (depends
+  base-unix
+  (dune (>= 2.1))
+ )
+)
diff --git a/tools/ocaml/libs/eventchn/dune b/tools/ocaml/libs/eventchn/dune
new file mode 100644
index 0000000000..4468f2e769
--- /dev/null
+++ b/tools/ocaml/libs/eventchn/dune
@@ -0,0 +1,11 @@
+(library
+ (foreign_stubs
+  (language c)
+  (names xeneventchn_stubs)
+  (extra_deps ../../../include/xen/xen.h ../../../libs/evtchn/libxenevtchn.so)
+  (include_dirs ../../../include))
+ (name xeneventchn)
+ (public_name xen.eventchn)
+ (libraries unix)
+ (no_dynlink)
+ (c_library_flags -lxenevtchn))
diff --git a/tools/ocaml/libs/mmap/dune b/tools/ocaml/libs/mmap/dune
new file mode 100644
index 0000000000..57a8ab5b9b
--- /dev/null
+++ b/tools/ocaml/libs/mmap/dune
@@ -0,0 +1,9 @@
+(library
+ (foreign_stubs
+  (language c)
+  (names xenmmap_stubs))
+ (name xenmmap)
+ (public_name xen.mmap)
+ (libraries unix)
+ (no_dynlink)
+ (install_c_headers mmap_stubs))
diff --git a/tools/ocaml/libs/xb/dune b/tools/ocaml/libs/xb/dune
new file mode 100644
index 0000000000..13a507ea87
--- /dev/null
+++ b/tools/ocaml/libs/xb/dune
@@ -0,0 +1,10 @@
+(library
+ (foreign_stubs
+  (language c)
+  (extra_deps ../../../include/xen/xen.h)
+  (include_dirs ../../../include)
+  (names xenbus_stubs xs_ring_stubs))
+ (name xenbus)
+ (public_name xen.bus)
+ (no_dynlink)
+ (libraries unix xenmmap))
diff --git a/tools/ocaml/libs/xc/dune b/tools/ocaml/libs/xc/dune
new file mode 100644
index 0000000000..6f9450cd27
--- /dev/null
+++ b/tools/ocaml/libs/xc/dune
@@ -0,0 +1,16 @@
+(rule
+ (with-stdout-to
+  xenctrl_abi_check.h
+  (run perl -w %{dep:abi-check} %{dep:xenctrl_stubs.c} %{dep:xenctrl.ml})))
+
+(library
+ (foreign_stubs
+  (language c)
+  (names xenctrl_stubs)
+  (extra_deps ../../../include/xen/xen.h ../../../libs/ctrl/libxenctrl.so)
+  (include_dirs ../../../include))
+ (name xenctrl)
+ (public_name xen.ctrl)
+ (libraries unix xenmmap)
+ (no_dynlink)
+ (c_library_flags -lxenctrl -lxenguest))
diff --git a/tools/ocaml/libs/xs/dune b/tools/ocaml/libs/xs/dune
new file mode 100644
index 0000000000..086259f51d
--- /dev/null
+++ b/tools/ocaml/libs/xs/dune
@@ -0,0 +1,15 @@
+; fallback mode: the files may have been generated by configure already
+
+(rule
+ (targets paths.ml)
+ (deps paths.ml.in)
+ (mode fallback)
+ (action
+  (run ../../../config.status --file=paths.ml)))
+
+(library
+ ; avoid conflict with mirage lib: name it differently
+ (name xenstore_xen)
+ (public_name xen.store)
+ (no_dynlink)
+ (libraries unix xenbus))
diff --git a/tools/ocaml/xenstored/dune b/tools/ocaml/xenstored/dune
new file mode 100644
index 0000000000..d71decebcf
--- /dev/null
+++ b/tools/ocaml/xenstored/dune
@@ -0,0 +1,51 @@
+; fallback mode: the files may have been generated by configure already
+; also for fallback mode either all files must be present or none
+; hence the 2 separate rules here
+
+(rule
+ (targets oxenstored.conf)
+ (deps oxenstored.conf.in)
+ (mode fallback)
+ (action
+  (run ../../config.status --file=oxenstored.conf)))
+
+(rule
+ (targets paths.ml)
+ (deps paths.ml.in)
+ (mode fallback)
+ (action
+  (run ../../config.status --file=paths.ml)))
+
+(executable
+ (modes native)
+ (name xenstored)
+ (modules
+  (:standard \ syslog systemd))
+ (flags
+  (:standard -w -52))
+ (libraries unix xen.bus xen.mmap xen.ctrl xen.eventchn xenstubs))
+
+(install
+ (package xenstored)
+ (section sbin)
+ (files
+  (xenstored.exe as oxenstored)))
+
+(install
+ (package xen)
+ (section etc)
+ (files oxenstored.conf))
+
+(library
+ (foreign_stubs
+  (language c)
+  (names syslog_stubs systemd_stubs select_stubs)
+  (extra_deps ../../dune-workspace)
+  (flags
+   (:standard -DHAVE_SYSTEMD)))
+ (modules syslog systemd)
+ (name xenstubs)
+ (wrapped false)
+ (libraries unix)
+ (no_dynlink)
+ (c_library_flags -lsystemd))
-- 
2.34.1


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