gnu: libusb-compat: Add libusb to RUNPATH.

This avoids the error:

  teensy_loader_cli: error while loading libusb-1.0.so.0 from libusb-0.1.so.4:
  libusb-1.0.so.0: cannot open shared object file: No such file or directory

e.g. when running teensy_loader_cli, which uses libusb-compat.

* gnu/packages/libusb.scm (libusb-compat)
[arguments] <configure-flags>: New LDFLAGS variable.

1 files changed, 5 insertions, 1 deletions

diff --git a/gnu/packages/libusb.scm b/gnu/packages/libusb.scm
index 5ebae9fe1c7..1d514c11b72 100644
--- a/gnu/packages/libusb.scm
+++ b/gnu/packages/libusb.scm
@@ -102,7 +102,11 @@ devices on various operating systems.")
     (build-system gnu-build-system)
     (arguments
      (list #:configure-flags
-           #~(list "--disable-static")))
+           #~(list "--disable-static"
+                   ;; Extending the RUNPATH is necessary, otherwise loading
+                   ;; the libusb-1.0.so.0 library fails.
+                   (string-append "LDFLAGS=-Wl,-rpath="
+                                  #$(this-package-input "libusb") "/lib"))))
     (native-inputs
      (list autoconf automake libtool pkg-config))
     (inputs