From: Tim D. Smith <git@tim-smith.us>
Date: Tue, 24 Mar 2015 06:09:57 +0000 (-0700)
Subject: Don't explicitly link Python on OS X
X-Git-Tag: accepted/tizen/6.0/unified/20201030.111113~1314^2~240^2
X-Git-Url: http://review.tizen.org/git/?a=commitdiff_plain;h=d057828ee399e749d745c959eb70227bdfc7bf00;p=platform%2Fupstream%2Fopencv.git

Don't explicitly link Python on OS X

Explicitly linking to a Python framework on OS X prevents modules from
being built against one python (i.e. system python) and imported from
another (i.e. Homebrew python); the interpreter segfaults if there's a
linkage to a foreign python. Building the module with `-undefined
dynamic_lookup` instead of an explicit link allows the symbols to be
resolved at load time from a compatible python.
---

diff --git a/modules/python/CMakeLists.txt b/modules/python/CMakeLists.txt
index 3c0f2fd..354c786 100644
--- a/modules/python/CMakeLists.txt
+++ b/modules/python/CMakeLists.txt
@@ -64,7 +64,11 @@ add_library(${the_module} SHARED src2/cv2.cpp ${CMAKE_CURRENT_BINARY_DIR}/genera
 if(PYTHON_DEBUG_LIBRARIES AND NOT PYTHON_LIBRARIES MATCHES "optimized.*debug")
   target_link_libraries(${the_module} debug ${PYTHON_DEBUG_LIBRARIES} optimized ${PYTHON_LIBRARIES})
 else()
-  target_link_libraries(${the_module} ${PYTHON_LIBRARIES})
+  if(APPLE)
+    set_target_properties(${the_module} PROPERTIES LINK_FLAGS "-undefined dynamic_lookup")
+  else()
+    target_link_libraries(${the_module} ${PYTHON_LIBRARIES})
+  endif()
 endif()
 target_link_libraries(${the_module} ${OPENCV_MODULE_${the_module}_DEPS})