From 8996f6a2bca508f1d31dd6f7ceaa17f68ccd6f68 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Sebasti=C3=A1n=20Mancilla?= <smancill@smancill.dev>
Date: Sun, 21 Nov 2021 13:49:58 -0300
Subject: [PATCH] ctl: fix build on darwin

Patch the target_link_libraries CMake command for the IlmCtlMath library
to fix undefined symbols.

No need to make the patch darwin only.
---
 pkgs/development/libraries/ctl/default.nix | 10 ++++++++++
 1 file changed, 10 insertions(+)

diff --git a/pkgs/development/libraries/ctl/default.nix b/pkgs/development/libraries/ctl/default.nix
index be643e3a52c6..0a9f50a6aaa6 100644
--- a/pkgs/development/libraries/ctl/default.nix
+++ b/pkgs/development/libraries/ctl/default.nix
@@ -19,6 +19,16 @@ stdenv.mkDerivation rec {
     })
   ];
 
+  postPatch = ''
+    # Fix include guard name
+    substituteInPlace lib/dpx/dpx_raw.hh \
+        --replace CRL_DPX_RAW_INTERNAL_INCLUDE CTL_DPX_RAW_INTERNAL_INCLUDE
+
+    # Fix undefined symbols (link with Imath)
+    substituteInPlace lib/IlmCtlMath/CMakeLists.txt \
+        --replace "( IlmCtlMath IlmCtl )" "( IlmCtlMath IlmCtl Imath)"
+  '';
+
   nativeBuildInputs = [ cmake pkg-config ];
   buildInputs = [ libtiff ilmbase openexr ];