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Statically link genai samples to OpenCV #4092

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Link samples statically to OpenCV
olpipi Jul 6, 2026
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olpipi Jul 7, 2026
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20 changes: 4 additions & 16 deletions samples/cpp/fetch_opencv.cmake
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Original file line number Diff line number Diff line change
Expand Up @@ -7,6 +7,7 @@ function(ov_genai_link_opencv target_name)
set(required_components core imgproc videoio imgcodecs)
endif()

set(OpenCV_STATIC ON)

@Wovchena Wovchena Jul 7, 2026

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Is there a significant change to compiled samples size?

@olpipi olpipi Jul 7, 2026 •
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yes. text2video on Linux:
~3Mb -> ~70Mb for Debug
~130Kb -> 28Mb for Release

find_package(OpenCV QUIET COMPONENTS ${required_components})

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if(NOT OpenCV_FOUND)
Expand All @@ -16,7 +17,9 @@ function(ov_genai_link_opencv target_name)
cmake_policy(SET CMP0135 NEW)
endif()

set(BUILD_SHARED_LIBS ON)
set(BUILD_SHARED_LIBS OFF CACHE BOOL "" FORCE)
set(CMAKE_POSITION_INDEPENDENT_CODE ON)
set(OPENCV_ENABLE_PLUGINS OFF CACHE BOOL "" FORCE)
set(WITH_FFMPEG ON)
set(WITH_PROTOBUF OFF CACHE BOOL "" FORCE)
set(WITH_GSTREAMER OFF CACHE BOOL "" FORCE)
Expand Down Expand Up @@ -67,21 +70,6 @@ function(ov_genai_link_opencv target_name)
target_include_directories(${target_name} PRIVATE
${OPENCV_MODULE_opencv_${component}_LOCATION}/include)
endforeach()

if(LINUX)
set_target_properties(${target_name} ${opencv_targets} PROPERTIES
INSTALL_RPATH "$ORIGIN/../lib"
INSTALL_RPATH_USE_LINK_PATH ON)
elseif(APPLE)
set_target_properties(${target_name} ${opencv_targets} PROPERTIES
INSTALL_RPATH "@loader_path/../lib"
INSTALL_RPATH_USE_LINK_PATH ON)
endif()

# Signal to callers that OpenCV was built from source via FetchContent,
# so target-scoped CMake can emit any runtime deployment rules it needs
# (e.g., installing the fetched DLLs next to a Windows sample EXE).
set_property(GLOBAL PROPERTY OV_GENAI_FETCHED_OPENCV TRUE)
else()
set(opencv_targets ${OpenCV_LIBS})
if(OpenCV_INCLUDE_DIRS)
Expand Down
16 changes: 0 additions & 16 deletions samples/cpp/image_generation/CMakeLists.txt
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Original file line number Diff line number Diff line change
Expand Up @@ -54,22 +54,6 @@ set_target_properties(denoising_process PROPERTIES
# Ensure out of box LC_RPATH on macOS with SIP
INSTALL_RPATH_USE_LINK_PATH ON)

# Windows: when OpenCV was built from source via FetchContent, deploy the
# component DLLs next to denoising_process.exe in samples_bin/. The Windows
# loader has no rpath, and install/samples_bin/ is not on PATH at runtime
# unless the user puts it there. Skipped when find_package found a system
# OpenCV, since those installs ship their own runtime path.
get_property(_ov_genai_opencv_fetched GLOBAL PROPERTY OV_GENAI_FETCHED_OPENCV)
if(WIN32 AND _ov_genai_opencv_fetched)
install(FILES "$<TARGET_FILE:opencv_core>"
"$<TARGET_FILE:opencv_imgproc>"
"$<TARGET_FILE:opencv_imgcodecs>"
"$<TARGET_FILE:opencv_videoio>"
DESTINATION samples_bin/
COMPONENT samples_bin
EXCLUDE_FROM_ALL)
endif()

install(TARGETS denoising_process
RUNTIME DESTINATION samples_bin/
COMPONENT samples_bin
Expand Down
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