From 120102de658ae6ef5267132e62b4335a0854db54 Mon Sep 17 00:00:00 2001
From: Vincent Laporte <Vincent.Laporte@gmail.com>
Date: Sat, 23 Nov 2019 07:19:47 +0000
Subject: [PATCH] OCaml: optionally enable AFL support

---
 pkgs/development/compilers/ocaml/generic.nix | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

diff --git a/pkgs/development/compilers/ocaml/generic.nix b/pkgs/development/compilers/ocaml/generic.nix
index 4b68094647a7..d39c0d86fd57 100644
--- a/pkgs/development/compilers/ocaml/generic.nix
+++ b/pkgs/development/compilers/ocaml/generic.nix
@@ -12,16 +12,18 @@ in
 
 { stdenv, fetchurl, ncurses, buildEnv
 , libX11, xorgproto, useX11 ? safeX11 stdenv
+, aflSupport ? false
 , flambdaSupport ? false
 }:
 
 assert useX11 -> !stdenv.isAarch32 && !stdenv.isMips;
+assert aflSupport -> stdenv.lib.versionAtLeast version "4.05";
 assert flambdaSupport -> stdenv.lib.versionAtLeast version "4.03";
 
 let
    useNativeCompilers = !stdenv.isMips;
    inherit (stdenv.lib) optional optionals optionalString;
-   name = "ocaml${optionalString flambdaSupport "+flambda"}-${version}";
+   name = "ocaml${optionalString aflSupport "+afl"}${optionalString flambdaSupport "+flambda"}-${version}";
 in
 
 let
@@ -49,6 +51,7 @@ stdenv.mkDerivation (args // {
     optionals useX11 (flags
       [ "--x-libraries=${x11lib}" "--x-includes=${x11inc}"]
       [ "-x11lib" x11lib "-x11include" x11inc ])
+  ++ optional aflSupport (flags "--with-afl" "-afl-instrument")
   ++ optional flambdaSupport (flags "--enable-flambda" "-flambda")
   ;