sci-libs/libgeodecomp: Fix build with OpenCV enabled

Closes: https://bugs.gentoo.org/762196
Package-Manager: Portage-3.0.9, Repoman-3.0.2
Signed-off-by: Kurt Kanzenbach <kurt@kmk-computers.de>
Closes: https://github.com/gentoo/gentoo/pull/18850
Signed-off-by: Sam James <sam@gentoo.org>

2 files changed, 190 insertions, 1 deletions

diff --git a/sci-libs/libgeodecomp/files/libgeodecomp-0.5.0_pre20201009-opencv.patch b/sci-libs/libgeodecomp/files/libgeodecomp-0.5.0_pre20201009-opencv.patch
new file mode 100644
index 000000000000..0a0632812493
--- /dev/null
+++ b/sci-libs/libgeodecomp/files/libgeodecomp-0.5.0_pre20201009-opencv.patch
@@ -0,0 +1,186 @@
+From 3a20ca303ccc8d9d7cfd9787b392f1436d266243 Mon Sep 17 00:00:00 2001
+From: Kurt Kanzenbach <kurt@kmk-computers.de>
+Date: Mon, 28 Dec 2020 15:03:16 +0100
+Subject: [PATCH] cmake: Fix build with OpenCV
+
+The FindOpenCV module assumes that OpenCV in installed into a separate
+directory which makes sense for cluster machines etc.
+
+However, on Gentoo OpenCV is installed by portage and the corresponding Cmake
+module can be used directly.
+
+Signed-off-by: Kurt Kanzenbach <kurt@kmk-computers.de>
+---
+ CMakeModules/FindOpenCV.cmake | 160 ----------------------------------
+ 1 file changed, 160 deletions(-)
+ delete mode 100644 CMakeModules/FindOpenCV.cmake
+
+diff --git a/CMakeModules/FindOpenCV.cmake b/CMakeModules/FindOpenCV.cmake
+deleted file mode 100644
+index 68d629da5a4d..000000000000
+--- a/CMakeModules/FindOpenCV.cmake
++++ /dev/null
+@@ -1,160 +0,0 @@
+-###########################################################
+-#                  Find OpenCV Library
+-# See http://sourceforge.net/projects/opencvlibrary/
+-#----------------------------------------------------------
+-#
+-## 1: Setup:
+-# The following variables are optionally searched for defaults
+-#  OpenCV_DIR:            Base directory of OpenCv tree to use.
+-#
+-## 2: Variable
+-# The following are set after configuration is done: 
+-#  
+-#  OpenCV_FOUND
+-#  OpenCV_LIBS
+-#  OpenCV_INCLUDE_DIR
+-#  OpenCV_VERSION (OpenCV_VERSION_MAJOR, OpenCV_VERSION_MINOR, OpenCV_VERSION_PATCH)
+-#
+-#
+-# Deprecated variable are used to maintain backward compatibility with
+-# the script of Jan Woetzel (2006/09): www.mip.informatik.uni-kiel.de/~jw
+-#  OpenCV_INCLUDE_DIRS
+-#  OpenCV_LIBRARIES
+-#  OpenCV_LINK_DIRECTORIES
+-# 
+-## 3: Version
+-#
+-# 2010/04/07 Benoit Rat, Correct a bug when OpenCVConfig.cmake is not found.
+-# 2010/03/24 Benoit Rat, Add compatibility for when OpenCVConfig.cmake is not found.
+-# 2010/03/22 Benoit Rat, Creation of the script.
+-#
+-#
+-# tested with:
+-# - OpenCV 2.1:  MinGW, MSVC2008
+-# - OpenCV 2.0:  MinGW, MSVC2008, GCC4
+-#
+-#
+-## 4: Licence:
+-#
+-# LGPL 2.1 : GNU Lesser General Public License Usage
+-# Alternatively, this file may be used under the terms of the GNU Lesser
+-
+-# General Public License version 2.1 as published by the Free Software
+-# Foundation and appearing in the file LICENSE.LGPL included in the
+-# packaging of this file.  Please review the following information to
+-# ensure the GNU Lesser General Public License version 2.1 requirements
+-# will be met: http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html.
+-# 
+-#----------------------------------------------------------
+-
+-
+-find_path(OpenCV_DIR "OpenCVConfig.cmake" /usr/share/OpenCV DOC "Root directory of OpenCV")
+-
+-##====================================================
+-## Find OpenCV libraries
+-##----------------------------------------------------
+-if(EXISTS "${OpenCV_DIR}")
+-
+-        #When its possible to use the Config script use it.
+-        if(EXISTS "${OpenCV_DIR}/OpenCVConfig.cmake")
+-
+-                ## Include the standard CMake script
+-                include("${OpenCV_DIR}/OpenCVConfig.cmake")
+-
+-                ## Search for a specific version
+-                set(CVLIB_SUFFIX "${OpenCV_VERSION_MAJOR}${OpenCV_VERSION_MINOR}${OpenCV_VERSION_PATCH}")
+-
+-        #Otherwise it try to guess it.
+-        else(EXISTS "${OpenCV_DIR}/OpenCVConfig.cmake")
+-
+-                set(OPENCV_LIB_COMPONENTS cxcore cv ml highgui cvaux)
+-                find_path(OpenCV_INCLUDE_DIR "cv.h" PATHS "${OpenCV_DIR}" PATH_SUFFIXES "include" "include/opencv" DOC "")
+-                if(EXISTS  ${OpenCV_INCLUDE_DIR})
+-                        include_directories(${OpenCV_INCLUDE_DIR})
+-                endif(EXISTS  ${OpenCV_INCLUDE_DIR})
+-
+-                #Find OpenCV version by looking at cvver.h
+-                file(STRINGS ${OpenCV_INCLUDE_DIR}/cvver.h OpenCV_VERSIONS_TMP REGEX "^#define CV_[A-Z]+_VERSION[ \t]+[0-9]+$")
+-                string(REGEX REPLACE ".*#define CV_MAJOR_VERSION[ \t]+([0-9]+).*" "\\1" OpenCV_VERSION_MAJOR ${OpenCV_VERSIONS_TMP})
+-                string(REGEX REPLACE ".*#define CV_MINOR_VERSION[ \t]+([0-9]+).*" "\\1" OpenCV_VERSION_MINOR ${OpenCV_VERSIONS_TMP})
+-                string(REGEX REPLACE ".*#define CV_SUBMINOR_VERSION[ \t]+([0-9]+).*" "\\1" OpenCV_VERSION_PATCH ${OpenCV_VERSIONS_TMP})
+-                set(OpenCV_VERSION ${OpenCV_VERSION_MAJOR}.${OpenCV_VERSION_MINOR}.${OpenCV_VERSION_PATCH} CACHE STRING "" FORCE)
+-                set(CVLIB_SUFFIX "${OpenCV_VERSION_MAJOR}${OpenCV_VERSION_MINOR}${OpenCV_VERSION_PATCH}")
+-
+-        endif(EXISTS "${OpenCV_DIR}/OpenCVConfig.cmake")
+-
+-
+-
+-
+-        ## Initiate the variable before the loop
+-        set(GLOBAL OpenCV_LIBS "")
+-        set(OpenCV_FOUND_TMP true)
+-
+-        ## Loop over each components
+-        foreach(__CVLIB ${OPENCV_LIB_COMPONENTS})
+-                
+-                find_library(OpenCV_${__CVLIB}_LIBRARY_DEBUG NAMES "${__CVLIB}${CVLIB_SUFFIX}d" "lib${__CVLIB}${CVLIB_SUFFIX}d" PATHS "${OpenCV_DIR}/lib" NO_DEFAULT_PATH)
+-                find_library(OpenCV_${__CVLIB}_LIBRARY_RELEASE NAMES "${__CVLIB}${CVLIB_SUFFIX}" "lib${__CVLIB}${CVLIB_SUFFIX}" PATHS "${OpenCV_DIR}/lib" NO_DEFAULT_PATH)
+-                
+-                #Remove the cache value
+-                set(OpenCV_${__CVLIB}_LIBRARY "" CACHE STRING "" FORCE)
+-                
+-                #both debug/release
+-                if(OpenCV_${__CVLIB}_LIBRARY_DEBUG AND OpenCV_${__CVLIB}_LIBRARY_RELEASE)
+-                        set(OpenCV_${__CVLIB}_LIBRARY debug ${OpenCV_${__CVLIB}_LIBRARY_DEBUG} optimized ${OpenCV_${__CVLIB}_LIBRARY_RELEASE}  CACHE STRING "" FORCE)
+-                #only debug
+-                elseif(OpenCV_${__CVLIB}_LIBRARY_DEBUG)
+-                        set(OpenCV_${__CVLIB}_LIBRARY ${OpenCV_${__CVLIB}_LIBRARY_DEBUG}  CACHE STRING "" FORCE)
+-                #only release
+-                elseif(OpenCV_${__CVLIB}_LIBRARY_RELEASE)
+-                        set(OpenCV_${__CVLIB}_LIBRARY ${OpenCV_${__CVLIB}_LIBRARY_RELEASE}  CACHE STRING "" FORCE)
+-                #no library found
+-                else()
+-                        set(OpenCV_FOUND_TMP false)
+-                endif()
+-                
+-                #Add to the general list
+-                if(OpenCV_${__CVLIB}_LIBRARY)
+-                        set(OpenCV_LIBS ${OpenCV_LIBS} ${OpenCV_${__CVLIB}_LIBRARY})
+-                endif(OpenCV_${__CVLIB}_LIBRARY)
+-                
+-        endforeach(__CVLIB)
+-
+-
+-        set(OpenCV_FOUND ${OpenCV_FOUND_TMP} CACHE BOOL "" FORCE)
+-
+-
+-else(EXISTS "${OpenCV_DIR}")
+-        set(ERR_MSG "Please specify OpenCV directory using OpenCV_DIR env. variable")
+-endif(EXISTS "${OpenCV_DIR}")
+-##====================================================
+-
+-
+-##====================================================
+-## Print message
+-##----------------------------------------------------
+-if(NOT OpenCV_FOUND)
+-        # make FIND_PACKAGE friendly
+-        if(NOT OpenCV_FIND_QUIETLY)
+-                if(OpenCV_FIND_REQUIRED)
+-                        message(FATAL_ERROR "OpenCV required but some headers or libs not found. ${ERR_MSG}")
+-                else(OpenCV_FIND_REQUIRED)
+-                        message(STATUS "WARNING: OpenCV was not found. ${ERR_MSG}")
+-                endif(OpenCV_FIND_REQUIRED)
+-        endif(NOT OpenCV_FIND_QUIETLY)
+-endif(NOT OpenCV_FOUND)
+-##====================================================
+-
+-
+-##====================================================
+-## Backward compatibility
+-##----------------------------------------------------
+-if(OpenCV_FOUND)
+-        option(OpenCV_BACKWARD_COMPA "Add some variable to make this script compatible with the other version of FindOpenCV.cmake" false)
+-        if(OpenCV_BACKWARD_COMPA)
+-                find_path(OpenCV_INCLUDE_DIRS "cv.h" PATHS "${OpenCV_DIR}" PATH_SUFFIXES "include" "include/opencv" DOC "Include directory") 
+-                find_path(OpenCV_INCLUDE_DIR "cv.h" PATHS "${OpenCV_DIR}" PATH_SUFFIXES "include" "include/opencv" DOC "Include directory")
+-                set(OpenCV_LIBRARIES "${OpenCV_LIBS}" CACHE STRING "" FORCE)
+-        endif(OpenCV_BACKWARD_COMPA)
+-endif(OpenCV_FOUND)
+-##====================================================
+-- 
+2.26.2
+
diff --git a/sci-libs/libgeodecomp/libgeodecomp-0.5.0_pre20201009.ebuild b/sci-libs/libgeodecomp/libgeodecomp-0.5.0_pre20201009.ebuild
index 70aa22852709..3b63da935131 100644
--- a/sci-libs/libgeodecomp/libgeodecomp-0.5.0_pre20201009.ebuild
+++ b/sci-libs/libgeodecomp/libgeodecomp-0.5.0_pre20201009.ebuild
@@ -42,7 +42,10 @@ DEPEND="${RDEPEND}
 
 S="${WORKDIR}/libgeodecomp-${MY_COMMIT}"
 
-PATCHES=( "${FILESDIR}/${P}-mpi.patch" )
+PATCHES=(
+	"${FILESDIR}/${P}-mpi.patch"
+	"${FILESDIR}/${P}-opencv.patch"
+)
 
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