![]() Note To use the OpenCV library you have two options: Installation by Using the Pre-built Libraries or Installation by Making Your Own Libraries from the Source Files. If you encounter errors after following the steps described below, feel free to contact us via our OpenCV Q&A forum. Nevertheless, it should also work on any other relatively modern version of Windows OS. The description here was tested on Windows 7 SP1. Next Tutorial: How to build applications with OpenCV inside the "Microsoft Visual Studio" Set(CMAKE_C_COMPILER $ is useful if you have a bunch of precompiled libraries as you as you can use that to dynamically search for libs in your private lib dirs based on the target platform/arch.Prev Tutorial: Using OpenCV with Eclipse (plugin CDT) Remember to set the executable flags on this scripsĬreate also a symlink to the system ar binary in this form $ln /usr/bin/ar i686-linux-gnu-arĪt last create the toolchain-linux32.cmake file # the name of the target operating system Do the same for the g++ compiler #!/bin/sh usr/bin/gcc -m32 you see, it's just make a call to the system compiler adding the -m flag. Open your preferred editor and create this simple bash script for gcc compiler. Go where your CMakeLists.txt resides and create a bin directory. Install multilib support: $sudo apt-get install gcc-multilibįirst, we create a "fake" i686 compiler. It's uses a "fake" cmake toolchain so CMAKE somehow "believes" it's on 32bit system, so no additional modifications are needed inside your cmake project files, no special configurations, no special settings (well almost). This solution will allow you cross-compile your cmake project on a linu圆4 host targeting 32bits, on systems with multi-arch support. "On mixed 32/64 bit Linux installations cross compilation cannot be used to build for 32/64 bit only." Searching more, I found original design doesn't seem to be designed for anything more than windows-linux or linux-windows cross compiles."Ĭmake is NOT tested for linux amd64 to linux x86. I'll update this post with more details on what I achieved and how. What I need is a kind of tutorial, or at least some of the missing pieces. I am not sure: this is one of my missing pieces. Note: the dynamically linked libraries are already compiled and installed on the target computer, so maybe I don't need to worry about this step. How would I do about compiling those libraries for the target host (flags to use, etc.)? Does this mean that I need to compile each of those binaries for the target host as well? Some use cmake and some use. for testing and debugging), how do I tell cmake to make either one or both binaries?Īlso, you can see that I use some third party libraries, some of which I had to compile myself. Should I want to make only one executable (e.g. How do I introduce the flag -m32 to create a second executable? Target_link_libraries(./run.amd64 cppcms dbixx config++ ctemplate) Part of my CMakeLists.txt looks like this: add_definitions(-Wall -pthread)Īdd_executable (./run.amd64 user.cpp time.cpp init.cpp utils.cpp main.cpp) Ideally, when I do 'make' (with cmake), it should spit out both a amd64 binary and a x86 one. I did: sudo apt-get install g++-multilib missing pieces: Links to the following, although I am not too sure yet how to use it: I may have to pay attention to that within my code. That's one piece.Ĭross-platform: selecting data types to use 32/64 bit How to compile a 32-bit binary on a 64-bit linux machine with gcc/cmake Target: linux kubuntu x86 (32bit) (should be easy, no?) I have searched both SO and the web and found many pieces of information, but I don't always know how to put those pieces together because there are still some missing pieces. I am about to attempt my first cross-compilation. I'll appreciate individual pieces of the puzzle just as much. ![]() +1 for each piece of information that helps to complete the whole picture. ![]()
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