1 files changed, 55 insertions, 0 deletions
diff --git a/nixpkgs/pkgs/development/libraries/opencv/cmake-don-t-use-OpenCVFindOpenEXR.patch b/nixpkgs/pkgs/development/libraries/opencv/cmake-don-t-use-OpenCVFindOpenEXR.patch
new file mode 100644
index 00000000000..dc80b09b646
--- /dev/null
+++ b/nixpkgs/pkgs/development/libraries/opencv/cmake-don-t-use-OpenCVFindOpenEXR.patch
@@ -0,0 +1,55 @@
+From 6d988c08e852379a163ecd20df8639196d84d014 Mon Sep 17 00:00:00 2001
+From: Bernardo Meurer <meurerbernardo@gmail.com>
+Date: Sun, 26 Apr 2020 14:50:25 -0700
+Subject: [PATCH] cmake: don't use OpenCVFindOpenEXR
+
+Use find_package for this.
+---
+ CMakeLists.txt                  |  2 ++
+ cmake/OpenCVFindLibsGrfmt.cmake | 15 +++------------
+ 2 files changed, 5 insertions(+), 12 deletions(-)
+
+diff --git a/CMakeLists.txt b/CMakeLists.txt
+index 4c0b3880fc..0360469350 100644
+--- a/CMakeLists.txt
++++ b/CMakeLists.txt
+@@ -14,6 +14,8 @@ FATAL: In-source builds are not allowed.
+ ")
+ endif()
+ 
++# the future!
++include(FindPkgConfig)
+ 
+ include(cmake/OpenCVMinDepVersions.cmake)
+ 
+diff --git a/cmake/OpenCVFindLibsGrfmt.cmake b/cmake/OpenCVFindLibsGrfmt.cmake
+index 0beaf19317..4c5e46e615 100644
+--- a/cmake/OpenCVFindLibsGrfmt.cmake
++++ b/cmake/OpenCVFindLibsGrfmt.cmake
+@@ -227,20 +227,11 @@ endif()
+ # --- OpenEXR (optional) ---
+ if(WITH_OPENEXR)
+   ocv_clear_vars(HAVE_OPENEXR)
+-  if(NOT BUILD_OPENEXR)
+-    include("${OpenCV_SOURCE_DIR}/cmake/OpenCVFindOpenEXR.cmake")
+-  endif()
+-
++  pkg_check_modules(OPENEXR OpenEXR)
+   if(OPENEXR_FOUND)
+     set(HAVE_OPENEXR YES)
+-  else()
+-    ocv_clear_vars(OPENEXR_INCLUDE_PATHS OPENEXR_LIBRARIES OPENEXR_ILMIMF_LIBRARY OPENEXR_VERSION)
+-
+-    set(OPENEXR_LIBRARIES IlmImf)
+-    add_subdirectory("${OpenCV_SOURCE_DIR}/3rdparty/openexr")
+-    if(OPENEXR_VERSION)  # check via TARGET doesn't work
+-      set(HAVE_OPENEXR YES)
+-    endif()
++    set(OPENEXR_INCLUDE_PATHS ${OPENEXR_INCLUDE_DIRS})
++    set(OPENEXR_LIBRARIES ${OPENEXR_LIBRARIES})
+   endif()
+ endif()
+ 
+-- 
+2.26.1
+