opencv: fix CMake error if a directory contains ++

fix #1091

src/opencv-5-fix-in-bad-dir.patch

@@ -0,0 +1,66 @@
+This file is part of MXE.
+See index.html for further information.
+
+Contains ad hoc patches for cross building.
+
+From 0000000000000000000000000000000000000000 Mon Sep 17 00:00:00 2001
+From: Boris Nagaev <bnagaev@gmail.com>
+Date: Sun, 20 Dec 2015 18:14:56 +0300
+Subject: [PATCH] fix CMake error if a directory contains ++
+
+See https://github.com/mxe/mxe/issues/1091
+
+diff --git a/cmake/OpenCVModule.cmake b/cmake/OpenCVModule.cmake
+index 1111111..2222222 100644
+--- a/cmake/OpenCVModule.cmake
++++ b/cmake/OpenCVModule.cmake
+@@ -364,12 +364,16 @@ function(__ocv_resolve_dependencies)
+   # process private deps
+   foreach(m ${OPENCV_MODULES_BUILD})
+     foreach(d ${OPENCV_MODULE_${m}_PRIVATE_REQ_DEPS})
+-      if(NOT (";${deps_${m}};" MATCHES ";${d};"))
++      # can't use MATCH because file paths can include regexp special chars
++      string(FIND ";${deps_${m}};" ";${d};" d_offset)
++      if(${d_offset} EQUAL -1)
+         list(APPEND deps_${m} ${d})
+       endif()
+     endforeach()
+     foreach(d ${OPENCV_MODULE_${m}_PRIVATE_OPT_DEPS})
+-      if(NOT (";${deps_${m}};" MATCHES ";${d};"))
++      # can't use MATCH because file paths can include regexp special chars
++      string(FIND ";${deps_${m}};" ";${d};" d_offset)
++      if(${d_offset} EQUAL -1)
+         if(HAVE_${d} OR TARGET ${d})
+           list(APPEND deps_${m} ${d})
+         endif()
+diff --git a/cmake/OpenCVPCHSupport.cmake b/cmake/OpenCVPCHSupport.cmake
+index 1111111..2222222 100644
+--- a/cmake/OpenCVPCHSupport.cmake
++++ b/cmake/OpenCVPCHSupport.cmake
+@@ -54,7 +54,9 @@ MACRO(_PCH_GET_COMPILE_FLAGS _out_compile_flags)
+ 
+     GET_DIRECTORY_PROPERTY(DIRINC INCLUDE_DIRECTORIES )
+     FOREACH(item ${DIRINC})
+-        if(item MATCHES "^${OpenCV_SOURCE_DIR}/modules/")
++        # can't use MATCH because file paths can include regexp special chars
++        string(FIND "${item}" "${OpenCV_SOURCE_DIR}/modules/" modules_offset)
++        if(${modules_offset} EQUAL 0)
+           LIST(APPEND ${_out_compile_flags} "${_PCH_include_prefix}\"${item}\"")
+         else()
+           LIST(APPEND ${_out_compile_flags} "${_PCH_isystem_prefix}\"${item}\"")
+diff --git a/cmake/OpenCVUtils.cmake b/cmake/OpenCVUtils.cmake
+index 1111111..2222222 100644
+--- a/cmake/OpenCVUtils.cmake
++++ b/cmake/OpenCVUtils.cmake
+@@ -39,7 +39,10 @@ function(ocv_include_directories)
+   set(__add_before "")
+   foreach(dir ${ARGN})
+     get_filename_component(__abs_dir "${dir}" ABSOLUTE)
+-    if("${__abs_dir}" MATCHES "^${OpenCV_SOURCE_DIR}" OR "${__abs_dir}" MATCHES "^${OpenCV_BINARY_DIR}")
++    # can't use MATCH because file paths can include regexp special chars
++    string(FIND "${__abs_dir}" "${OpenCV_SOURCE_DIR}" OpenCV_SOURCE_DIR_offset)
++    string(FIND "${__abs_dir}" "${OpenCV_BINARY_DIR}" OpenCV_BINARY_DIR_offset)
++    if($OpenCV_BINARY_DIR_offset} EQUAL 0 OR ${OpenCV_BINARY_DIR_offset} EQUAL 0)
+       list(APPEND __add_before "${dir}")
+     else()
+       include_directories(AFTER SYSTEM "${dir}")