我试图用CMake在BeagleBone Black上编译OpenCV，但它找不到一些库，如gstream。我在BBB本地运行cmake，它显示了rootfs有gstream。我如何告诉CMake在正确的路径搜索?
我toolchane.cmake
set(CMAKE_SYSTEM_NAME Linux)
set(CMAKE_SYSTEM_VERSION 4.4.9-ti-r25)
set(CMAKE_SYSTEM_PROCESSOR armv7l)
set(GCC_COMPILER_VERSION "4.7" CACHE STRING "GCC Compiler version")
####### Architecture ################
set(FLOAT_ABI_SUFFIX "hf")
set(ENABLE_NEON TRUE)
###### Link Compile Path ##############
set(ARM_SYS_ROOT_PATH /mnt/BBB)
set(ARM_STD_USR_PATH ${ARM_SYS_ROOT_PATH}/usr )
set(ARM_STD_LIB_PATH ${ARM_SYS_ROOT_PATH}/usr/lib )
set(ARM_SYS_LIB_PATH ${ARM_SYS_ROOT_PATH}/lib )
set(ARM_STD_INC_PATH ${ARM_SYS_ROOT_PATH}/usr/include )
set(GCC_MACHINE_DUMP arm-linux-gnueabihf)
set(CMAKE_INSTALL_PREFIX ${ARM_SYS_ROOT_PATH}/usr/local/OpenCV ) ## install Path
set(CMAKE_SYSROOT ${ARM_LINUX_SYSROOT})
set(CMAKE_FIND_ROOT_PATH ${CMAKE_SYSROOT}) ##searchs in X/lib and X/usr/lib
set(CMAKE_INCLUDE_PATH ${ARM_STD_INC_PATH} ; ${ARM_STD_INC_PATH}/${GCC_MACHINE_DUMP} )
set(CMAKE_LIBRARY_PATH ${ARM_STD_LIB_PATH} ; ${ARM_STD_LIB_PATH}/${GCC_MACHINE_DUMP} ; ${ARM_SYS_LIB_PATH} ; ${ARM_SYS_LIB_PATH}/${GCC_MACHINE_DUMP})
set(CMAKE_PROGRAM_PATH ${ARM_SYS_ROOT_PATH}/usr/bin})
##### Install path ##############
set(CMAKE_INSTALL_PREFIX ${ARM_STD_USR_PATH})
##### Other ###########
set(CMAKE_COLOR_MAKEFILE ON)
set(PKG_CONFIG_EXECUTABLE /usr/bin/pkg-config)
################# Compiler ##########
set(CMAKE_C_COMPILER "/usr/gcc-linaro-arm-linux-gnueabihf-4.7/bin/arm-linux-gnueabihf-gcc")
set(CMAKE_CXX_COMPILER "/usr/gcc-linaro-arm-linux-gnueabihf-4.7/bin/arm-linux-gnueabihf-g++")
set(CMAKE_AR "/usr/gcc-linaro-arm-linux-gnueabihf-4.7/bin/arm-linux-gnueabihf-ar")
set(CMAKE_RANLIB "/usr/gcc-linaro-arm-linux-gnueabihf-4.7/bin/arm-linux-gnueabihf-ranlib")
set(CMAKE_LINKER "/usr/gcc-linaro-arm-linux-gnueabihf-4.7/bin/arm-linux-gnueabihf-ld")
### C and Cxx Flags ########################
set(DCMAKE_BUILD_TYPE Release)
set(CMAKE_CXX_FLAGS "-isystem /mnt/BBB/lib:/mnt/BBB/lib/arm-linux-gnueabihf:/mnt/BBB/usr/lib/arm-linux-gnueabihf" CACHE STRING "c++ flags")
set(CMAKE_C_FLAGS "-isystem /mnt/BBB/lib:/mnt/BBB/lib/arm-linux-gnueabihf:/mnt/BBB/usr/lib/arm-linux-gnueabihf" CACHE STRING "c flags")
set(CMAKE_SHARED_LINKER_FLAGS "-isystem /mnt/BBB/lib:/mnt/BBB/lib/arm-linux-gnueabihf:/mnt/BBB/usr/lib/arm-linux-gnueabihf" CACHE STRING "shared linker flags")
set(CMAKE_MODULE_LINKER_FLAGS "-isystem /mnt/BBB/lib:/mnt/BBB/lib/arm-linux-gnueabihf:/mnt/BBB/usr/lib/arm-linux-gnueabihf" CACHE STRING "module linker flags")
set(CMAKE_EXE_LINKER_FLAGS "-Wl,-z,-rpath-link" CACHE STRING "executable linker flags")
set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -mthumb -fdata-sections -Wa,--noexecstack -fsigned-char -Wno-psabi")
set(CMAKE_C_FLAGS "${CMAKE_C_FLAGS} -mthumb -fdata-sections -Wa,--noexecstack -fsigned-char -Wno-psabi")
set(CMAKE_SHARED_LINKER_FLAGS "-Wl,--fix-cortex-a8 -Wl,--no-undefined -Wl,--gc-sections -Wl,-z,noexecstack -Wl,-z,relro -Wl,-z,now ${CMAKE_SHARED_LINKER_FLAGS}")
set(CMAKE_MODULE_LINKER_FLAGS "-Wl,--fix-cortex-a8 -Wl,--no-undefined -Wl,--gc-sections -Wl,-z,noexecstack -Wl,-z,relro -Wl,-z,now ${CMAKE_MODULE_LINKER_FLAGS}")
set(CMAKE_EXE_LINKER_FLAGS "-Wl,--fix-cortex-a8 -Wl,--no-undefined -Wl,--gc-sections -Wl,-z,noexecstack -Wl,-z,relro -Wl,-z,now ${CMAKE_EXE_LINKER_FLAGS}")
########### Macro to Limit Find path in host and targert ###################
# search for programs in the build host directories
SET(CMAKE_FIND_ROOT_PATH_MODE_PROGRAM NEVER)
# for libraries and headers in the target directories
SET(CMAKE_FIND_ROOT_PATH_MODE_LIBRARY ONLY)
SET(CMAKE_FIND_ROOT_PATH_MODE_INCLUDE ONLY)
交叉编译结果CMake
General configuration for OpenCV 2.4.11 =====================================
Version control: unknown
Platform:
Host: Linux 3.16.0-38-generic x86_64
Target: Linux 4.4.9-ti-r25 armv7l
CMake: 2.8.12.2
CMake generator: Unix Makefiles
CMake build tool: /usr/bin/make
Configuration: Release
C/C++:
Built as dynamic libs?: YES
C++ Compiler: /usr/gcc-linaro-arm-linux-gnueabihf-4.7/bin/arm-linux-gnueabihf-g++ (ver 4.7.3)
C++ flags (Release): -isystem /mnt/BBB/lib:/mnt/BBB/lib/arm-linux-gnueabihf:/mnt/BBB/usr/lib/arm-linux-gnueabihf -mthumb -fdata-sections -Wa,--noexecstack -fsigned-char -Wno-psabi -O3 -DNDEBUG -DNDEBUG
C++ flags (Debug): -isystem /mnt/BBB/lib:/mnt/BBB/lib/arm-linux-gnueabihf:/mnt/BBB/usr/lib/arm-linux-gnueabihf -mthumb -fdata-sections -Wa,--noexecstack -fsigned-char -Wno-psabi -g -O0 -DDEBUG -D_DEBUG
C Compiler: /usr/gcc-linaro-arm-linux-gnueabihf-4.7/bin/arm-linux-gnueabihf-gcc
C flags (Release): -isystem /mnt/BBB/lib:/mnt/BBB/lib/arm-linux-gnueabihf:/mnt/BBB/usr/lib/arm-linux-gnueabihf -mthumb -fdata-sections -Wa,--noexecstack -fsigned-char -Wno-psabi -O3 -DNDEBUG -DNDEBUG
C flags (Debug): -isystem /mnt/BBB/lib:/mnt/BBB/lib/arm-linux-gnueabihf:/mnt/BBB/usr/lib/arm-linux-gnueabihf -mthumb -fdata-sections -Wa,--noexecstack -fsigned-char -Wno-psabi -g -O0 -DDEBUG -D_DEBUG
Linker flags (Release): -Wl,--fix-cortex-a8 -Wl,--no-undefined -Wl,--gc-sections -Wl,-z,noexecstack -Wl,-z,relro -Wl,-z,now -isystem /mnt/BBB/lib:/mnt/BBB/lib/arm-linux-gnueabihf:/mnt/BBB/usr/lib/arm-linux-gnueabihf
Linker flags (Debug): -Wl,--fix-cortex-a8 -Wl,--no-undefined -Wl,--gc-sections -Wl,-z,noexecstack -Wl,-z,relro -Wl,-z,now -isystem /mnt/BBB/lib:/mnt/BBB/lib/arm-linux-gnueabihf:/mnt/BBB/usr/lib/arm-linux-gnueabihf
Precompiled headers: YES
OpenCV modules:
To be built: core flann imgproc highgui features2d calib3d ml video legacy objdetect photo gpu ocl nonfree contrib stitching superres ts videostab
Disabled: world
Disabled by dependency: -
Unavailable: androidcamera dynamicuda java python viz
GUI:
QT: NO
GTK+ 2.x: YES (ver 2.24.23)
GThread : YES (ver 2.40.2)
GtkGlExt: NO
OpenGL support: NO
VTK support: NO
Media I/O:
ZLib: /mnt/BBB/usr/lib/arm-linux-gnueabihf/libz.so (ver 1.2.8)
JPEG: /mnt/BBB/usr/lib/arm-linux-gnueabihf/libjpeg.so (ver )
PNG: /mnt/BBB/usr/lib/arm-linux-gnueabihf/libpng.so (ver 1.2.50)
TIFF: /mnt/BBB/usr/lib/arm-linux-gnueabihf/libtiff.so (ver 42 - 4.0.3)
JPEG 2000: /mnt/BBB/usr/lib/arm-linux-gnueabihf/libjasper.so (ver 1.900.1)
OpenEXR: /mnt/BBB/usr/lib/arm-linux-gnueabihf/libImath.so /mnt/BBB/usr/lib/arm-linux-gnueabihf/libIlmImf.so /mnt/BBB/usr/lib/arm-linux-gnueabihf/libIex.so /mnt/BBB/usr/lib/arm-linux-gnueabihf/libHalf.so /mnt/BBB/usr/lib/arm-linux-gnueabihf/libIlmThread.so (ver 1.6.1)
Video I/O:
DC1394 1.x: NO
DC1394 2.x: NO
FFMPEG: YES
codec: YES (ver 54.35.0)
format: YES (ver 54.20.4)
util: YES (ver 52.3.0)
swscale: YES (ver 2.1.1)
gentoo-style: YES
GStreamer: NO
OpenNI: NO
OpenNI PrimeSensor Modules: NO
PvAPI: NO
GigEVisionSDK: NO
UniCap: NO
UniCap ucil: NO
V4L/V4L2: NO/YES
XIMEA: NO
Xine: NO
Other third-party libraries:
Use IPP: NO
Use Eigen: NO
Use TBB: NO
Use OpenMP: NO
Use GCD NO
Use Concurrency NO
Use C=: NO
Use Cuda: NO
Use OpenCL: YES
OpenCL:
Version: dynamic
Include path: /home/arash/Desktop/opencv-2.4.11/3rdparty/include/opencl/1.2
Use AMD FFT: NO
Use AMD BLAS: NO
Python:
Interpreter: /usr/bin/python2 (ver 2.7.6)
Java:
ant: NO
JNI: NO
Java tests: NO
Documentation:
Build Documentation: NO
Sphinx: NO
PdfLaTeX compiler: NO
Doxygen: NO
Tests and samples:
Tests: YES
Performance tests: YES
C/C++ Examples: NO
Install path: /mnt/BBB/usr
cvconfig.h is in: /home/arash/Desktop/opencv-2.4.11/buildBBBnew
本地CMake在BBB目标上的结果
-- General configuration for OpenCV 2.4.11 =====================================
-- Version control: unknown
--
-- Platform:
-- Host: Linux 4.4.9-ti-r25 armv7l
-- CMake: 3.4.1
-- CMake generator: Unix Makefiles
-- CMake build tool: /usr/bin/make
-- Configuration: Release
--
-- C/C++:
-- Built as dynamic libs?: YES
-- C++ Compiler: /usr/bin/c++ (ver 4.9.2)
-- C++ flags (Release): -fsigned-char -W -Wall -Werror=return-type -Werror=address -Werror=sequence-point -Wformat -Werror=format-security -Wmissing-declarations -Wundef -Winit-self -Wpointer-arith -Wshadow -Wsign-promo -Wno-narrowing -Wno-delete-non-virtual-dtor -fdiagnostics-show-option -pthread -fomit-frame-pointer -ffunction-sections -O3 -DNDEBUG -DNDEBUG
-- C++ flags (Debug): -fsigned-char -W -Wall -Werror=return-type -Werror=address -Werror=sequence-point -Wformat -Werror=format-security -Wmissing-declarations -Wundef -Winit-self -Wpointer-arith -Wshadow -Wsign-promo -Wno-narrowing -Wno-delete-non-virtual-dtor -fdiagnostics-show-option -pthread -fomit-frame-pointer -ffunction-sections -g -O0 -DDEBUG -D_DEBUG
-- C Compiler: /usr/bin/cc
-- C flags (Release): -fsigned-char -W -Wall -Werror=return-type -Werror=address -Werror=sequence-point -Wformat -Werror=format-security -Wmissing-declarations -Wmissing-prototypes -Wstrict-prototypes -Wundef -Winit-self -Wpointer-arith -Wshadow -Wno-narrowing -fdiagnostics-show-option -pthread -fomit-frame-pointer -ffunction-sections -O3 -DNDEBUG -DNDEBUG
-- C flags (Debug): -fsigned-char -W -Wall -Werror=return-type -Werror=address -Werror=sequence-point -Wformat -Werror=format-security -Wmissing-declarations -Wmissing-prototypes -Wstrict-prototypes -Wundef -Winit-self -Wpointer-arith -Wshadow -Wno-narrowing -fdiagnostics-show-option -pthread -fomit-frame-pointer -ffunction-sections -g -O0 -DDEBUG -D_DEBUG
-- Linker flags (Release):
-- Linker flags (Debug):
-- Precompiled headers: YES
--
-- OpenCV modules:
-- To be built: core flann imgproc highgui features2d calib3d ml video legacy objdetect photo gpu ocl nonfree contrib python stitching superres ts videostab
-- Disabled: world
-- Disabled by dependency: -
-- Unavailable: androidcamera dynamicuda java viz
--
-- GUI:
-- QT: NO
-- GTK+ 2.x: YES (ver 2.24.25)
-- GThread : YES (ver 2.42.1)
-- GtkGlExt: NO
-- OpenGL support: NO
-- VTK support: NO
--
-- Media I/O:
-- ZLib: /usr/lib/arm-linux-gnueabihf/libz.so (ver 1.2.8)
-- JPEG: /usr/lib/arm-linux-gnueabihf/libjpeg.so (ver )
-- PNG: /usr/lib/arm-linux-gnueabihf/libpng.so (ver 1.2.50)
-- TIFF: /usr/lib/arm-linux-gnueabihf/libtiff.so (ver 42 - 4.0.3)
-- JPEG 2000: /usr/lib/arm-linux-gnueabihf/libjasper.so (ver 1.900.1)
-- OpenEXR: /usr/lib/arm-linux-gnueabihf/libImath.so /usr/lib/arm-linux-gnueabihf/libIlmImf.so /usr/lib/arm-linux-gnueabihf/libIex.so /usr/lib/arm-linux-gnueabihf/libHalf.so /usr/lib/arm-linux-gnueabihf/libIlmThread.so (ver 1.6.1)
--
-- Video I/O:
-- DC1394 1.x: NO
-- DC1394 2.x: YES (ver 2.2.3)
-- FFMPEG: YES
-- codec: YES (ver 56.1.0)
-- format: YES (ver 56.1.0)
-- util: YES (ver 54.3.0)
-- swscale: YES (ver 3.0.0)
-- gentoo-style: YES
-- GStreamer:
-- base: YES (ver 1.4.4)
-- video: YES (ver 1.4.4)
-- app: YES (ver 1.4.4)
-- riff: YES (ver 1.4.4)
-- pbutils: YES (ver 1.4.4)
-- OpenNI: NO
-- OpenNI PrimeSensor Modules: NO
-- PvAPI: NO
-- GigEVisionSDK: NO
-- UniCap: NO
-- UniCap ucil: NO
-- V4L/V4L2: Using libv4l1 (ver 1.6.0) / libv4l2 (ver 1.6.0)
-- XIMEA: NO
-- Xine: NO
--
-- Other third-party libraries:
-- Use IPP: NO
-- Use Eigen: NO
-- Use TBB: NO
-- Use OpenMP: NO
-- Use GCD NO /mnt/BBB/usr/lib/mnt/BBB/usr/lib/arm-linux-gnueabihf/mnt/BBB/lib/mnt/BBB/lib/arm-linux-gnueabihf
-- Use Concurrency NO
-- Use C=: NO
-- Use Cuda: NO
-- Use OpenCL: YES
--
-- OpenCL:
-- Version: dynamic
-- Include path: /home/debian/Desktop/opencv-2.4.11/3rdparty/include/opencl/1.2
-- Use AMD FFT: NO
-- Use AMD BLAS: NO
--
-- Python:
-- Interpreter: /usr/bin/python2 (ver 2.7.9)
-- Libraries: /usr/lib/arm-linux-gnueabihf/libpython2.7.so (ver 2.7.9)
-- numpy: /usr/lib/python2.7/dist-packages/numpy/core/include (ver 1.8.2)
-- packages path: lib/python2.7/dist-packages
--
-- Java:
-- ant: NO
-- JNI: NO
-- Java tests: NO
--
-- Documentation:
-- Build Documentation: NO
-- Sphinx: NO
-- PdfLaTeX compiler: NO
-- Doxygen: NO
--
-- Tests and samples:
-- Tests: YES
-- Performance tests: YES
-- C/C++ Examples: NO
--
-- Install path: /usr/local
--
-- cvconfig.h is in: /home/debian/Desktop/opencv-2.4.11/build
-- -----------------------------------------------------------------
--
-- Configuring done
-- Generating done
-- Build files have been written to: /home/debian/Desktop/opencv-2.4.11/build
感谢@Tsyvarev，问题是pkg-config。在host中有:
myPC:~$ pkg-config --libs gstreamer-1.0
Package gstreamer-1.0 was not found in the pkg-config search path.
但在目标BeagleBone:
beaglebone:~# pkg-config --modversion gstreamer-1.0
1.4.4
和。pc文件在目标中的路径为:
beaglebone:~# pkg-config --variable pc_path pkg-config
/usr/local/lib/arm-linux-gnueabihf/pkgconfig:/usr/local/lib/pkgconfig:/usr/local/share/pkgconfig:/usr/lib/arm-linux-gnueabihf/pkgconfig:/usr/lib/pkgconfig:/usr/share/pkgconfig
[错了!]因此，我简单地将这些路径以/mnt/BBB(我的目标rootfs)的前缀添加到主机的pkg-config环境并运行cmake，一切都很好识别:
myPC:~$ export PKG_CONFIG_PATH=/mnt/BBB/usr/local/lib/arm-linux-gnueabihf/pkgconfig:/mnt/BBB/usr/local/lib/pkgconfig:/mnt/BBB/usr/local/share/pkgconfig:/mnt/BBB/usr/lib/arm-linux-gnueabihf/pkgconfig:/mnt/BBB/usr/lib/pkgconfig:/mnt/BBB/usr/share/pkgconfig
myPC:~$ cmake-gui
[编辑:正确方式]根据这个链接，我需要创建pkg-config包装器脚本。在我的工具链目录我有arm-linux-gnueabihf-pkg-config-real，然后我应该修改它的脚本如下:
#!/bin/sh
#
# Wrapper script that calls the real pkg-config with the relocated
# sysroot location
#
set -e
GCC="${0%%-pkg-config}-gcc"
MACHINE=`"$GCC" -dumpmachine`
SYSROOT=`"$GCC" -print-sysroot`
SYSROOT=/mnt/BBB #My modification
export PKG_CONFIG_DIR=
export PKG_CONFIG_LIBDIR="${SYSROOT}/usr/lib/${MACHINE}/pkgconfig":"${SYSROOT}/usr/lib/pkgconfig":"${SYSROOT}/usr/share/pkgconfig"
export PKG_CONFIG_SYSROOT_DIR="${SYSROOT}"
exec "$0-real" "$@"
然后在工具链中设置此脚本路径。cmake
set(PKG_CONFIG_EXECUTABLE /usr/gcc-linaro-arm-linux-gnueabihf-4.7/bin/arm-linux-gnueabihf-pkg-config)