From 83f6beddab6999712d93f4f865055be4f0d0c63f Mon Sep 17 00:00:00 2001
From: Sergei Trofimovich <slyich@gmail.com>
Date: Sun, 18 Dec 2022 19:43:30 +0000
Subject: [PATCH] clisp: pin to readline6 to fix the build

On readline8 clisp fails to find the variables and fails to build:
https://hydra.nixos.org/log/rbykd92038rp80a71diyxqmbiz4m8f60-clisp-2.49.drv

    *** - FFI::FIND-FOREIGN-VARIABLE: foreign variable
      #<FOREIGN-VARIABLE "rl_readline_state" #x00007FFFF7FBC640> does not have
      the required size or alignment

The pin back fixes build for me.

Noticed by Athas on libera/#nixos.
---
 pkgs/top-level/all-packages.nix | 8 +++++++-
 1 file changed, 7 insertions(+), 1 deletion(-)

diff --git a/pkgs/top-level/all-packages.nix b/pkgs/top-level/all-packages.nix
index 780477ad777b..b57d68294731 100644
--- a/pkgs/top-level/all-packages.nix
+++ b/pkgs/top-level/all-packages.nix
@@ -15809,7 +15809,13 @@ with pkgs;
     openssl = openssl_1_1;
   };
 
-  clisp = callPackage ../development/interpreters/clisp { };
+  clisp = callPackage ../development/interpreters/clisp {
+    # On newer readline8 fails as:
+    #  #<FOREIGN-VARIABLE "rl_readline_state" #x...>
+    #   does not have the required size or alignment
+    readline = readline6;
+  };
+
   clisp-tip = callPackage ../development/interpreters/clisp/hg.nix { };
 
   clojupyter = callPackage ../applications/editors/jupyter-kernels/clojupyter {