Returning back to some extension coding. I seem to have hit a strange snag...
I want to set up and test a GL_OES_mapbuffer extension, something I had issues with in the past...
Im doing the normal methods..
PFNGLMAPBUFFEROESPROC glMapBuffer = NULL;
glMapBuffer = (PFNGLMAPBUFFEROESPROC)eglGetProcAddress("GL_OES_mapbuffer");
But.. I'm getting an odd linker error.
1>/usr/bin/ld: /opt/vc/lib/libEGL_static.a(egl_khr_image_client.c.o)(0): error : undefined reference to symbol 'dlsym@@GLIBC_2.4'
1>//lib/arm-linux-gnueabihf/libdl.so.2: error adding symbols: DSO missing from command line
Anyone know what this is? My linker options are the same ones I always use
-Wl,-gc-sections
Have I missed something obvious?
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Brian Beuken
- Posts: 221
- Joined: Fri Jan 29, 2016 12:51 pm
linking errors with eglGetProcAddress
Very old computer game programmer, now teaching very young computer game programmers, some very bad habits.
Wrote some book about coding Pi's and SBC's, it's out now...go get it!
http://www.scratchpadgames.net/
Wrote some book about coding Pi's and SBC's, it's out now...go get it!
http://www.scratchpadgames.net/
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Brian Beuken
- Posts: 221
- Joined: Fri Jan 29, 2016 12:51 pm
Re: linking errors with eglGetProcAddress
ah...
seems you need to include the libdl library
obvious when you see it....confusing as hell when you don't.
seems you need to include the libdl library
obvious when you see it....confusing as hell when you don't.
Very old computer game programmer, now teaching very young computer game programmers, some very bad habits.
Wrote some book about coding Pi's and SBC's, it's out now...go get it!
http://www.scratchpadgames.net/
Wrote some book about coding Pi's and SBC's, it's out now...go get it!
http://www.scratchpadgames.net/
Re: linking errors with eglGetProcAddress
Thanks for sharing!
I can also recommend anyone building stuff that should work outside X11 to link directly with -lbrcmEGL and -lbrcmGLESv2 instead of plain libEGL and libGLESv2. This is also needed when getting older stuff such as ioquake3 to work in the newer Rasbian releases.
I can also recommend anyone building stuff that should work outside X11 to link directly with -lbrcmEGL and -lbrcmGLESv2 instead of plain libEGL and libGLESv2. This is also needed when getting older stuff such as ioquake3 to work in the newer Rasbian releases.