Move to openexr2 compat package.

bcd.spec

@@ -4,7 +4,7 @@
 
 Name:           bcd
 Version:        1.1
-Release:        5.%{?date0}git%{?shortcommit0}%{?dist}
+Release:        6.%{?date0}git%{?shortcommit0}%{?dist}
 Summary:        Bayesian Collaborative Denoiser for Monte-Carlo Rendering
 # BSD: main program
 # AGPLv3+: src/io/exr
@@ -35,7 +35,17 @@ BuildRequires:  cmake
 BuildRequires:  make
 BuildRequires:  gcc-c++
 
+# As of OpenEXR 3 upstream has significantly reorganized the libraries
+# including splitting out imath as a standalone library (which this project may
+# or may not need). Please see
+# https://github.com/AcademySoftwareFoundation/Imath/blob/master/docs/PortingGuide2-3.md
+# for porting details and encourage upstream to support it. For now a 2.x
+# compat package is provided.
+%if 0%{?fedora} > 33
+BuildRequires:  cmake(OpenEXR) < 3
+%else
 BuildRequires:  OpenEXR-devel
+%endif
 BuildRequires:  eigen3-devel
 BuildRequires:  json-devel
 BuildRequires:  zlib-devel
@@ -130,6 +140,9 @@ cp -pr include/* %{buildroot}%{_includedir}
 
 
 %changelog
+* Sun Aug 01 2021 Richard Shaw <hobbes1069@gmail.com> - 1.1-6.20180610gitd94c9fa
+- Move to openexr2 compat package.
+
 * Wed Jul 21 2021 Fedora Release Engineering <releng@fedoraproject.org> - 1.1-5.20180610gitd94c9fa
 - Rebuilt for https://fedoraproject.org/wiki/Fedora_35_Mass_Rebuild