From fd0f8860ec667d091abb34f1e4dda4911e834dee Mon Sep 17 00:00:00 2001
From: Guillaume Le Vaillant <glv@posteo.net>
Date: Thu, 3 Oct 2019 11:01:11 +0200
Subject: [PATCH] gnu: ecl: Do not compile the deprecated MIT-RT.

Compiling the rt bundled with ECL prevents the ecl-rt package from compiling
properly, as ECL thinks it has already been compiled.

* gnu/packages/lisp.scm (ecl)[arguments]: Add '--without-rt' to
  'configure-flags'.
---
 gnu/packages/lisp.scm | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/gnu/packages/lisp.scm b/gnu/packages/lisp.scm
index 80ceb95271..3b810f4093 100644
--- a/gnu/packages/lisp.scm
+++ b/gnu/packages/lisp.scm
@@ -217,7 +217,8 @@ interface to the Tk widget system.")
               ("libgc" ,libgc)
               ("libffi" ,libffi)))
     (arguments
-     '(#:tests? #t
+     '(#:configure-flags '("--without-rt")
+       #:tests? #t
        #:parallel-tests? #f
        #:phases
        (modify-phases %standard-phases