I'm having problems to load share libraries after cross-compiling my C++ code using Docker Buildx, having a Raspberry Pi Zero W as the target.
After I perform the build, I copy the generated binary to a Raspberry Pi Zero already running and with OpenCV4 installed.
When I run the executable, the following error message is shown:
pi@raspberrypi:/mnt/system/$ ./software.run ./software.run: error while loading shared libraries: libopencv_freetype.so.4.2: cannot open shared object file: No such file or directory
Despite OpenCV4 being already installed, this particular lib wasn't in the /usr/lib. So, I copied it, run sudo ldconfig but, even after this procedure, my software still cannot find the lib.
I even added the /usr/lib to the path of the system, but, it didn't work.
pi@raspberrypi:/usr/lib $ sudo ldconfig -v | grep libopencv_free
ldconfig: Can't stat /usr/local/lib/arm-linux-gnueabihf: No such file or directory
ldconfig: Path `/lib/arm-linux-gnueabihf' given more than once
ldconfig: Path `/usr/lib/arm-linux-gnueabihf' given more than once
ldconfig: /lib/arm-linux-gnueabihf/ld-2.28.so is the dynamic linker, ignoring
ldconfig: /lib/ld-linux.so.3 is the dynamic linker, ignoring
libopencv_freetype.so.4.2 -> libopencv_freetype.so.4.2.0
pi@raspberrypi:/mnt/system/ $ file software.run
software.run: ELF 32-bit LSB pie executable, ARM, EABI5 version 1 (GNU/Linux), dynamically linked, interpreter /lib/ld-linux.so.3, for GNU/Linux 3.2.0, BuildID[sha1]=409a24c10761e2b9fd7a310cddfb09c86fb3a207, not stripped
pi@raspberrypi:/mnt/system $ echo $LD_LIBRARY_PATH
/usr/lib
Makefile:
CC = g++
STD = --std=c++14
SOFTWARE_SRC = $(wildcard src/software/*.cpp)
SOFTWARE_BIN = software.run
CV_LIBS = $(shell pkg-config --cflags --libs opencv4)
SOFTWARE_INC = -Iinclude -I/usr/include -I/usr/local/include
SOFTWARE_LDFLAGS = -lraspicam_cv -L/opt/vc/lib -lmmal -lmmal_core -lmmal_util -lwiringPi
all: software-out
software-out:
$(CC) $(STD) $(SOFTWARE_SRC) -o $(SOFTWARE_BIN) $(CV_LIBS) $(SOFTWARE_INC) $(SOFTWARE_LDFLAGS)
Other software that also uses OpenCV is working properly.
I also build a "Hello World" software just to validate my cross-compiling environment and it is working.
Thank you all in advance
