These days, XFree86 has been rejected in favor of XOrg due to the change in the license of XFree86, so many developers left Xfree86 and joined the XOrg group. In addition the Direct Rendering Infrastructure (DRI) is a driver framework that allows drivers to be written and interoperate within a standard framework to easily support hardware acceleration, the DRI is included in of XFree86 4.0 but may need a card specific driver to be configured after installation. There is a standard Application Binary Interface defined for OpenGL on Linux that gives application compatibility for OpenGL for a range of drivers. Supporting OpenGL on Linux involves using GLX extensions to the X Server. Graphics on Linux is almost exclusively implemented using the X Window system. If your system does not contain a GPU, or the GPU vendor delivers graphics drivers providing OpenGL support that's so old as to be useless to you, you might want to consider installing the Mesa3D OpenGL library on your system. None of these options are particularly fast, so installing drivers is always a good idea. Without drivers, you will default to a software version of OpenGL 1.1 (on Win98, ME, and 2000), a Direct3D wrapper that supports OpenGL 1.1 (WinXP), or a Direct3D wrapper that supports OpenGL 1.1 (Windows Vista and Windows 7). Some sites also distribute beta versions of graphics drivers, which may give you access to bug fixes or new functionality before an official driver release from the manufacturer: However, you will need to ensure that you have downloaded and installed a recent driver for your graphics hardware. In all three major desktop platforms (Linux, macOS, and Windows), OpenGL more or less comes with the system. Nowadays this is extra works since compiling 32bits from an x86_64 Linux OS is pretty much trivial, but this solution will work for other more exotic setup.This Wiki maintains a FAQ page for OpenGL. Having a toolchain file allows one to specify a different one on a par compiler basis, and you should be able to tweak the option when compiling in 32bits from a windows environement. Indeed your compiler may not be smart enough to know where to search for an x86 Qt library on an x86_64 system. The important part here is that one is now able to specify a root dir path ( CMAKE_FIND_ROOT_PATH) which should be used to search for third party lib. Then usage is simply: $ cmake -DCMAKE_TOOLCHAIN_FILE=toolchain.cmake /path/to/source Set(CMAKE_FIND_ROOT_PATH_MODE_INCLUDE ONLY) Set(CMAKE_FIND_ROOT_PATH_MODE_LIBRARY ONLY) Set(CMAKE_FIND_ROOT_PATH_MODE_PROGRAM NEVER) # search headers and libraries in the target environment, search # adjust the default behaviour of the FIND_XXX() commands: Set(CMAKE_FIND_ROOT_PATH /usr/i486-linux-gnu ) Something like: # the name of the target operating system I think this is because the -m32 made gcc generate 32-bit binaries, but ld is still trying for 64-bit output? Further Googling for this problem didn't give any success, so if anyone could verify that I am right and give the correct way of doing this, I would be very grateful!Įven if this seems like extra works, I believe a proper solution is to use toolchain file in this case. This does change things - I now get several errors like: /usr/bin/ld: i386 architecture of input file `*project-output-lib*' is incompatible with i386:x86-64 outputĪND still get the same errors for the external library too. I diagnosed this based on error messages such as: /usr/bin/ld: i386 architecture of input file `*external-32bit-lib*' is incompatible with i386:x86-64 outputįrom what I gather, I should therefore use: set (CMAKE_CXX_FLAGS "-m32") I need to force my project to build 32-bit binaries because I have to link with a library which is only available as 32-bit. Sorry that there are many similar questions, but I do find that Googling for CMake queries always yields similar-but-not-the-same scenarios, conflicting CMake commands and so on!
0 Comments
Leave a Reply. |
AuthorWrite something about yourself. No need to be fancy, just an overview. ArchivesCategories |