nixpkgs/pkgs/development/ocaml-modules/mirage-xen/makefile-no-opam.patch

diff --git a/lib/bindings/Makefile b/lib/bindings/Makefile
index 4e413c0..67c7bdc 100644
--- a/lib/bindings/Makefile
+++ b/lib/bindings/Makefile
@@ -1,4 +1,6 @@
-PKG_CONFIG_PATH := $(shell opam config var prefix)/lib/pkgconfig
+ifneq (, $(shell command -v opam))
+	PKG_CONFIG_PATH ?= $(shell opam config var prefix)/lib/pkgconfig
+endif
 
 CC ?= cc
 FREESTANDING_CFLAGS := $(shell PKG_CONFIG_PATH=$(PKG_CONFIG_PATH) pkg-config --cflags ocaml-freestanding)
ocamlPackages.mirage-xen: init at 6.0.0 Unfortunately this requires a bit of trickery with pkg-config to get to work. The root issue is that the mirage-xen assumes that we use the default libdir of dune ($out/lib) whereas we install to an OCaml version-specific site-lib directory. Thus the manually created pkg-config file makes wrong assumptions (which warrants a patch) and the .pc file is installed to the wrong location (which is fixed with a mv invocation). 2021-03-29 19:03:38 +00:00			`diff --git a/lib/bindings/Makefile b/lib/bindings/Makefile`
			`index 4e413c0..67c7bdc 100644`
			`--- a/lib/bindings/Makefile`
			`+++ b/lib/bindings/Makefile`
			`@@ -1,4 +1,6 @@`
			`-PKG_CONFIG_PATH := $(shell opam config var prefix)/lib/pkgconfig`
			`+ifneq (, $(shell command -v opam))`
			`+ PKG_CONFIG_PATH ?= $(shell opam config var prefix)/lib/pkgconfig`
			`+endif`

			`CC ?= cc`
			`FREESTANDING_CFLAGS := $(shell PKG_CONFIG_PATH=$(PKG_CONFIG_PATH) pkg-config --cflags ocaml-freestanding)`