opencv: fix build

Author: T-Dynamos

pythonforandroid/recipes/opencv/__init__.py

@@ -15,7 +15,7 @@ class OpenCVRecipe(NDKRecipe):
         build of most of the libraries of the opencv's package, so we can
         process images, videos, objects, photos...
     '''
-    version = '4.5.1'
+    version = '4.12.0'
     url = 'https://github.com/opencv/opencv/archive/{version}.zip'
     depends = ['numpy']
     patches = ['patches/p4a_build.patch']
@@ -68,8 +68,9 @@ def build_arch(self, arch):
             python_link_version = self.ctx.python_recipe.link_version
             python_library = join(python_link_root,
                                   'libpython{}.so'.format(python_link_version))
-            python_include_numpy = join(python_site_packages,
-                                        'numpy', 'core', 'include')
+            python_include_numpy = join(
+                self.ctx.get_python_install_dir(arch.arch), "numpy/_core/include",
+            )
 
             shprint(sh.cmake,
                     '-DP4A=ON',
@@ -136,7 +137,19 @@ def build_arch(self, arch):
 
                     self.get_build_dir(arch.arch),
                     _env=env)
-            shprint(sh.make, '-j' + str(cpu_count()), 'opencv_python' + python_major)
+
+            try:
+                shprint(sh.make, '-j' + str(cpu_count()), 'VERBOSE=1', 'opencv_python' + python_major)
+            except Exception:
+                # Patch link.txt and retry
+                link_txt = 'modules/python3/CMakeFiles/opencv_python3.dir/link.txt'
+                with open(link_txt, 'r+') as f:
+                    content = f.read().replace('-version', '--version')
+                    f.seek(0)
+                    f.write(content)
+                    f.truncate()
+                shprint(sh.make, '-j' + str(cpu_count()), 'opencv_python' + python_major)
+
             # Install python bindings (cv2.so)
             shprint(sh.cmake, '-DCOMPONENT=python', '-P', './cmake_install.cmake')
             # Copy third party shared libs that we need in our final apk

pythonforandroid/recipes/opencv/patches/p4a_build.patch

@@ -1,31 +1,22 @@
-This patch allow that the opencv's build command correctly detects our version
-of python, so we can successfully build the python bindings (cv2.so)
---- opencv-4.0.1/cmake/OpenCVDetectPython.cmake.orig	2018-12-22 08:03:30.000000000 +0100
-+++ opencv-4.0.1/cmake/OpenCVDetectPython.cmake	2019-01-31 11:33:10.896502978 +0100
-@@ -175,7 +175,7 @@ if(NOT ${found})
+diff '--color=auto' -uNr opencv-4.12.0/cmake/OpenCVDetectPython.cmake opencv-4.12.0.mod/cmake/OpenCVDetectPython.cmake
+--- opencv-4.12.0/cmake/OpenCVDetectPython.cmake	2025-07-02 13:24:13.000000000 +0530
++++ opencv-4.12.0.mod/cmake/OpenCVDetectPython.cmake	2025-09-20 22:22:14.961944470 +0530
+@@ -175,7 +175,7 @@
        endif()
      endif()
-
--    if(NOT ANDROID AND NOT IOS)
-+    if(P4A OR NOT ANDROID AND NOT IOS)
+ 
+-    if(NOT ANDROID AND NOT IOS AND NOT XROS)
++    if(P4A OR NOT ANDROID AND NOT IOS AND NOT XROS)
        if(CMAKE_HOST_UNIX)
-         execute_process(COMMAND ${_executable} -c "from distutils.sysconfig import *; print(get_python_lib())"
+         execute_process(COMMAND ${_executable} -c "from sysconfig import *; print(get_path('purelib'))"
                          RESULT_VARIABLE _cvpy_process
-@@ -244,7 +244,7 @@ if(NOT ${found})
-                           OUTPUT_STRIP_TRAILING_WHITESPACE)
-         endif()
-       endif()
--    endif(NOT ANDROID AND NOT IOS)
-+    endif(P4A OR NOT ANDROID AND NOT IOS)
-   endif()
-
-   # Export return values
---- opencv-4.0.1/modules/python/CMakeLists.txt.orig	2018-12-22 08:03:30.000000000 +0100
-+++ opencv-4.0.1/modules/python/CMakeLists.txt	2019-01-31 11:47:17.100494908 +0100
+diff '--color=auto' -uNr opencv-4.12.0/modules/python/CMakeLists.txt opencv-4.12.0.mod/modules/python/CMakeLists.txt
+--- opencv-4.12.0/modules/python/CMakeLists.txt	2025-07-02 13:24:13.000000000 +0530
++++ opencv-4.12.0.mod/modules/python/CMakeLists.txt	2025-09-20 22:23:15.124356524 +0530
 @@ -3,7 +3,7 @@
  # ----------------------------------------------------------------------------
  if(DEFINED OPENCV_INITIAL_PASS)  # OpenCV build
-
+ 
 -if(ANDROID OR APPLE_FRAMEWORK OR WINRT)
 +if(ANDROID AND NOT P4A OR APPLE_FRAMEWORK OR WINRT)
    ocv_module_disable_(python2)