This file is part of MXE. See LICENSE.md for licensing information.

Contains ad hoc patches for cross building.

From 0000000000000000000000000000000000000000 Mon Sep 17 00:00:00 2001
From: Jonas Kvinge <jonas@jkvinge.net>
Date: Tue, 11 Oct 2022 01:26:11 +0200
Subject: [PATCH 1/1] MinGW build fixes


diff --git a/cmake/OpenCVCompilerOptions.cmake b/cmake/OpenCVCompilerOptions.cmake
index 1111111..2222222 100644
--- a/cmake/OpenCVCompilerOptions.cmake
+++ b/cmake/OpenCVCompilerOptions.cmake
@@ -126,8 +126,6 @@ if(CV_GCC OR CV_CLANG)
   add_extra_compiler_option(-Wformat)
   add_extra_compiler_option(-Wformat-security -Wformat)
   add_extra_compiler_option(-Wmissing-declarations)
-  add_extra_compiler_option(-Wmissing-prototypes)
-  add_extra_compiler_option(-Wstrict-prototypes)
   add_extra_compiler_option(-Wundef)
   add_extra_compiler_option(-Winit-self)
   add_extra_compiler_option(-Wpointer-arith)
diff --git a/cmake/OpenCVFindLibsGrfmt.cmake b/cmake/OpenCVFindLibsGrfmt.cmake
index 1111111..2222222 100644
--- a/cmake/OpenCVFindLibsGrfmt.cmake
+++ b/cmake/OpenCVFindLibsGrfmt.cmake
@@ -2,6 +2,11 @@
 #  Detect 3rd-party image IO libraries
 # ----------------------------------------------------------------------------
 
+# --- lzma (required by apps, examples, perf, tests) ---
+if(BUILD_opencv_apps OR BUILD_EXAMPLES OR BUILD_PERF_TESTS OR BUILD_TESTS)
+  include(cmake/OpenCVFindLZMA.cmake)
+endif()
+
 # --- zlib (required) ---
 if(BUILD_ZLIB)
   ocv_clear_vars(ZLIB_FOUND)
diff --git a/cmake/OpenCVFindLibsVideo.cmake b/cmake/OpenCVFindLibsVideo.cmake
index 1111111..2222222 100644
--- a/cmake/OpenCVFindLibsVideo.cmake
+++ b/cmake/OpenCVFindLibsVideo.cmake
@@ -1,6 +1,6 @@
 # --- Extra HighGUI and VideoIO libs on Windows ---
 if(WIN32)
-  list(APPEND HIGHGUI_LIBRARIES comctl32 gdi32 ole32 setupapi ws2_32)
+  list(APPEND HIGHGUI_LIBRARIES -lcomctl32 -lcomdlg32 -lgdi32 -lole32 -lsetupapi -lws2_32 -lvfw32 -lstrmiids -loleaut32 -luuid)
 endif(WIN32)
 
 if(WITH_VA)
diff --git a/cmake/OpenCVModule.cmake b/cmake/OpenCVModule.cmake
index 1111111..2222222 100644
--- a/cmake/OpenCVModule.cmake
+++ b/cmake/OpenCVModule.cmake
@@ -602,12 +602,16 @@ 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/modules/core/src/lapack.cpp b/modules/core/src/lapack.cpp
index 1111111..2222222 100644
--- a/modules/core/src/lapack.cpp
+++ b/modules/core/src/lapack.cpp
@@ -628,7 +628,7 @@ void hal::SVD32f(float* At, size_t astep, float* W, float* U, size_t ustep, floa
 void hal::SVD64f(double* At, size_t astep, double* W, double* U, size_t ustep, double* Vt, size_t vstep, int m, int n, int n1)
 {
     CALL_HAL(SVD64f, cv_hal_SVD64f, At, astep, W, U, ustep, Vt, vstep, m, n, decodeSVDParameters(U, Vt, m, n, n1))
-    JacobiSVDImpl_(At, astep, W, Vt, vstep, m, n, !Vt ? 0 : n1 < 0 ? n : n1, DBL_MIN, DBL_EPSILON*10);
+    JacobiSVDImpl_(At, astep, W, Vt, vstep, m, n, !Vt ? 0 : n1 < 0 ? n : n1, DBL_MIN, DBL_EPSILON*10L);
 }
 
 /* y[0:m,0:n] += diag(a[0:1,0:m]) * x[0:m,0:n] */
diff --git a/modules/core/src/precomp.hpp b/modules/core/src/precomp.hpp
index 1111111..2222222 100644
--- a/modules/core/src/precomp.hpp
+++ b/modules/core/src/precomp.hpp
@@ -63,7 +63,7 @@
 #endif
 
 #include <ctype.h>
-#include <float.h>
+#include <cfloat>
 #include <limits.h>
 #include <math.h>
 #include <stdarg.h>
diff --git a/modules/dnn/CMakeLists.txt b/modules/dnn/CMakeLists.txt
index 1111111..2222222 100644
--- a/modules/dnn/CMakeLists.txt
+++ b/modules/dnn/CMakeLists.txt
@@ -67,7 +67,7 @@ if(MSVC)
     ocv_warnings_disable(CMAKE_CXX_FLAGS /wd4592)  # symbol will be dynamically initialized (implementation limitation)
   endif()
 else()
-  ocv_warnings_disable(CMAKE_CXX_FLAGS -Wno-deprecated -Wmissing-prototypes -Wmissing-declarations -Wshadow
+  ocv_warnings_disable(CMAKE_CXX_FLAGS -Wno-deprecated -Wmissing-declarations -Wshadow
                                        -Wunused-parameter -Wsign-compare
   )
 endif()