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cmake: relax CUDA version check to major.minor in OpenCVConfig (#26965)

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The first-class-language OpenCV CMake config (OpenCVConfig-CUDALanguage.cmake.in)
pinned the consumer's CUDA Toolkit to the exact patch version OpenCV was built
with (e.g. 12.3.107), via find_package(CUDAToolkit ... EXACT) and a full
VERSION_EQUAL check. Patch versions change frequently while the CUDA runtime API
is stable within a minor release, so this forced needless rebuilds and could
FATAL_ERROR even for a matching toolkit.

Per the core team's direction on #26966, the change lives in the installed
config template rather than the build scripts, and is controlled by a
consumer-set variable:

- Default: match major.minor only (fixes the reported patch-pinning bug).
- OPENCV_STRONG_CUDA_VERSION_CHECK: restore the exact full-version match.

The build-time detection (OpenCVDetectCUDALanguage.cmake) is left untouched, so
OpenCV_CUDA_VERSION still records the full version for diagnostics.

Fixes #26965
This commit is contained in:
WalkingDevFlag
2026-01-19 15:28:15 +05:30
committed by WalkingDevFlag
parent 2e80d30df4
commit 13eba3d842
1 changed files with 29 additions and 8 deletions
Download Patch File Download Diff File Expand all files Collapse all files
cmake/templates/OpenCVConfig-CUDALanguage.cmake.in
+28 -7
View File
@@ -10,6 +10,14 @@ set(OpenCV_CUDNN_VERSION "@CUDNN_VERSION@")
set(OpenCV_USE_CUDNN "@HAVE_CUDNN@")
set(ENABLE_CUDA_FIRST_CLASS_LANGUAGE ON)
# By default OpenCV only requires the consumer's CUDA Toolkit to match the
# major.minor version it was built with. The CUDA runtime API is stable within
# a minor release and patch versions change frequently, so pinning the patch
# component forces needless rebuilds (issue #26965). Set
# OPENCV_STRONG_CUDA_VERSION_CHECK before find_package(OpenCV) to require an
# exact match including the patch component.
string(REGEX MATCH "^[0-9]+\\.[0-9]+" OpenCV_CUDA_VERSION_MAJOR_MINOR "${OpenCV_CUDA_VERSION}")
if(NOT CUDAToolkit_FOUND)
if(NOT CMAKE_VERSION VERSION_LESS 3.18)
if(UNIX AND NOT CMAKE_CUDA_COMPILER AND NOT CUDAToolkit_ROOT)
@@ -17,15 +25,28 @@ if(NOT CUDAToolkit_FOUND)
set(CUDA_PATH "/usr/local/cuda" CACHE INTERNAL "")
set(ENV{CUDA_PATH} ${CUDA_PATH})
endif()
if(OPENCV_STRONG_CUDA_VERSION_CHECK)
find_package(CUDAToolkit ${OpenCV_CUDA_VERSION} EXACT REQUIRED)
else()
find_package(CUDAToolkit ${OpenCV_CUDA_VERSION_MAJOR_MINOR} REQUIRED)
endif()
else()
message(FATAL_ERROR "Using OpenCV compiled with CUDA as first class language requires CMake \>= 3.18.")
endif()
else()
if(CUDAToolkit_FOUND)
set(CUDA_VERSION_STRING ${CUDAToolkit_VERSION})
endif()
if(NOT CUDA_VERSION_STRING VERSION_EQUAL OpenCV_CUDA_VERSION)
message(FATAL_ERROR "OpenCV library was compiled with CUDA ${OpenCV_CUDA_VERSION} support. Please, use the same version or rebuild OpenCV with CUDA ${CUDA_VERSION_STRING}")
endif()
endif()
if(CUDAToolkit_FOUND)
set(CUDA_VERSION_STRING ${CUDAToolkit_VERSION})
endif()
string(REGEX MATCH "^[0-9]+\\.[0-9]+" CUDA_VERSION_STRING_MAJOR_MINOR "${CUDA_VERSION_STRING}")
if(OPENCV_STRONG_CUDA_VERSION_CHECK)
set(__ocv_cuda_found "${CUDA_VERSION_STRING}")
set(__ocv_cuda_built "${OpenCV_CUDA_VERSION}")
else()
set(__ocv_cuda_found "${CUDA_VERSION_STRING_MAJOR_MINOR}")
set(__ocv_cuda_built "${OpenCV_CUDA_VERSION_MAJOR_MINOR}")
endif()
if(NOT __ocv_cuda_found VERSION_EQUAL __ocv_cuda_built)
message(FATAL_ERROR "OpenCV library was compiled with CUDA ${OpenCV_CUDA_VERSION} support. Please, use the same version or rebuild OpenCV with CUDA ${CUDA_VERSION_STRING}")
endif()