Add blackbox test for cross compilation

test/blackbox-tests/jbuild

@@ -162,3 +162,10 @@
   (action
    (chdir test-cases/c-stubs
     (setenv JBUILDER ${bin:jbuilder} (run ${exe:cram.exe} run.t))))))
+
+(alias
+ ((name runtest)
+  (deps ((files_recursively_in test-cases/cross-compilation)))
+  (action
+   (chdir test-cases/cross-compilation
+    (setenv JBUILDER ${bin:jbuilder} (run ${exe:cram.exe} run.t))))))

test/blackbox-tests/test-cases/cross-compilation/bin/blah.ml

@@ -0,0 +1 @@
+let () = Printf.printf "%d\n" P.x

test/blackbox-tests/test-cases/cross-compilation/bin/jbuild

@@ -0,0 +1,6 @@
+(jbuild_version 1)
+
+(executable
+ ((name blah)
+  (public_name blah)
+  (libraries (p))))

test/blackbox-tests/test-cases/cross-compilation/jbuild

@@ -0,0 +1,3 @@
+(jbuild_version 1)
+
+(rule (with-stdout-to file (run ./bin/blah.exe)))

test/blackbox-tests/test-cases/cross-compilation/lib/jbuild

@@ -0,0 +1,5 @@
+(jbuild_version 1)
+
+(library
+ ((name p)
+  (public_name p)))

test/blackbox-tests/test-cases/cross-compilation/lib/p.ml

@@ -0,0 +1 @@
+let x = 42

test/blackbox-tests/test-cases/cross-compilation/run.t

@@ -0,0 +1,41 @@
+  $ env OCAMLFIND_CONF=$PWD/etc/findlib.conf $JBUILDER build --root . -j1 -x foo file @install
+      ocamldep bin/blah.depends.ocamldep-output [default.foo]
+      ocamldep lib/p.depends.ocamldep-output [default.foo]
+      ocamldep bin/blah.depends.ocamldep-output
+        ocamlc lib/p.{cmi,cmo,cmt} [default.foo]
+      ocamldep lib/p.depends.ocamldep-output
+      ocamlopt lib/p.{cmx,o} [default.foo]
+        ocamlc bin/blah.{cmi,cmo,cmt} [default.foo]
+        ocamlc lib/p.cma [default.foo]
+        ocamlc lib/p.{cmi,cmo,cmt}
+      ocamlopt lib/p.{a,cmxa} [default.foo]
+      ocamlopt bin/blah.{cmx,o} [default.foo]
+        ocamlc bin/blah.{cmi,cmo,cmt}
+      ocamlopt lib/p.{cmx,o}
+      ocamlopt lib/p.cmxs [default.foo]
+      ocamlopt bin/blah.exe [default.foo]
+      ocamlopt bin/blah.{cmx,o}
+      ocamlopt lib/p.{a,cmxa}
+      ocamlopt bin/blah.exe
+          blah file [default.foo]
+          blah file
+  $ cat _build/default.foo/file
+  42
+  $ ls *.install
+  p-foo.install
+  $ cat p-foo.install
+  lib: [
+    "_build/install/default.foo/lib/p/META" {"../../foo-sysroot/lib/p/META"}
+    "_build/install/default.foo/lib/p/opam" {"../../foo-sysroot/lib/p/opam"}
+    "_build/install/default.foo/lib/p/p.cmi" {"../../foo-sysroot/lib/p/p.cmi"}
+    "_build/install/default.foo/lib/p/p.cmx" {"../../foo-sysroot/lib/p/p.cmx"}
+    "_build/install/default.foo/lib/p/p.cmt" {"../../foo-sysroot/lib/p/p.cmt"}
+    "_build/install/default.foo/lib/p/p.ml" {"../../foo-sysroot/lib/p/p.ml"}
+    "_build/install/default.foo/lib/p/p.cma" {"../../foo-sysroot/lib/p/p.cma"}
+    "_build/install/default.foo/lib/p/p.cmxa" {"../../foo-sysroot/lib/p/p.cmxa"}
+    "_build/install/default.foo/lib/p/p.a" {"../../foo-sysroot/lib/p/p.a"}
+    "_build/install/default.foo/lib/p/p.cmxs" {"../../foo-sysroot/lib/p/p.cmxs"}
+  ]
+  bin: [
+    "_build/install/default.foo/bin/blah" {"../foo-sysroot/bin/blah"}
+  ]