libgl: undefined reference errors when trying to compile on Linux Mint 20.1

[mrgw454]

Hello,

I'm able to successfully compile xgs on my "Buster" based Raspberry Pi, but unable to get it compile on my Linux Mint 20.1 system.

Scanning dependencies of target xgs
[ 97%] Building CXX object CMakeFiles/xgs.dir/emulator/main.cc.o
[100%] Linking CXX executable xgs
/usr/bin/ld: gl/libgl.a(gl.c.o): in function `_impl_glIsVertexArray':
gl.c:(.text+0x17): undefined reference to `glXGetProcAddressARB'
/usr/bin/ld: gl/libgl.a(gl.c.o): in function `_impl_glBindVertexArray':
gl.c:(.text+0x49): undefined reference to `glXGetProcAddressARB'
/usr/bin/ld: gl/libgl.a(gl.c.o): in function `_impl_glFlushMappedBufferRange':
gl.c:(.text+0x84): undefined reference to `glXGetProcAddressARB'
/usr/bin/ld: gl/libgl.a(gl.c.o): in function `_impl_glRenderbufferStorageMultisample':
gl.c:(.text+0xd0): undefined reference to `glXGetProcAddressARB'
/usr/bin/ld: gl/libgl.a(gl.c.o): in function `_impl_glGenerateMipmap':
gl.c:(.text+0x113): undefined reference to `glXGetProcAddressARB'
/usr/bin/ld: gl/libgl.a(gl.c.o):gl.c:(.text+0x157): more undefined references to `glXGetProcAddressARB' follow
collect2: error: ld returned 1 exit status
make[2]: *** [CMakeFiles/xgs.dir/build.make:100: xgs] Error 1
make[1]: *** [CMakeFiles/Makefile2:316: CMakeFiles/xgs.dir/all] Error 2
make: *** [Makefile:84: all] Error 2

Not sure if this is because of an incompatible GL library. Thanks for any assistance you can provide!

[jmthompson]

Hello! Sorry for the delay, been massively busy at work lately. My guess is that the file gl/gl.c that's included in the repo right now may not be quite correct for your system. On line 92 in that file is the call to this function; try changing it to just use "glXGetProcAddress" (iow remove the "ARB") and see if rebuilding from there helps. BTW I'm a bit surprised someone is still trying to use XGS :)

…

On Sun, Oct 8, 2023 at 12:22 PM mrgw454 ***@***.***> wrote: Hello, I'm able to successfully compile xgs on my "Buster" based Raspberry Pi, but unable to get it compile on my Linux Mint 20.1 system. Scanning dependencies of target xgs [ 97%] Building CXX object CMakeFiles/xgs.dir/emulator/main.cc.o [100%] Linking CXX executable xgs /usr/bin/ld: gl/libgl.a(gl.c.o): in function `_impl_glIsVertexArray': gl.c:(.text+0x17): undefined reference to `glXGetProcAddressARB' /usr/bin/ld: gl/libgl.a(gl.c.o): in function `_impl_glBindVertexArray': gl.c:(.text+0x49): undefined reference to `glXGetProcAddressARB' /usr/bin/ld: gl/libgl.a(gl.c.o): in function `_impl_glFlushMappedBufferRange': gl.c:(.text+0x84): undefined reference to `glXGetProcAddressARB' /usr/bin/ld: gl/libgl.a(gl.c.o): in function `_impl_glRenderbufferStorageMultisample': gl.c:(.text+0xd0): undefined reference to `glXGetProcAddressARB' /usr/bin/ld: gl/libgl.a(gl.c.o): in function `_impl_glGenerateMipmap': gl.c:(.text+0x113): undefined reference to `glXGetProcAddressARB' /usr/bin/ld: gl/libgl.a(gl.c.o):gl.c:(.text+0x157): more undefined references to `glXGetProcAddressARB' follow collect2: error: ld returned 1 exit status make[2]: *** [CMakeFiles/xgs.dir/build.make:100: xgs] Error 1 make[1]: *** [CMakeFiles/Makefile2:316: CMakeFiles/xgs.dir/all] Error 2 make: *** [Makefile:84: all] Error 2 Not sure if this is because of an incompatible GL library. Thanks for any assistance you can provide! — Reply to this email directly, view it on GitHub <#3>, or unsubscribe <https://github.com/notifications/unsubscribe-auth/ABDSQQPNZ2RLN24BDIGX5VLX6LHKTAVCNFSM6AAAAAA5XZETU2VHI2DSMVQWIX3LMV43ASLTON2WKOZRHEZTCOBZGA3TSNY> . You are receiving this because you are subscribed to this thread.Message ID: ***@***.***>

[mrgw454]

Hi Joshua - no problem on the delay, sir. This is just hobby stuff. :)

I did look for line 92 in the file you specify, but I see this:

ron@x570:~/source/xgs/gl$ ls -l
total 340
-rw-rw-r-- 1 ron ron    160 Oct  7 17:46 CMakeLists.txt
-rw-rw-r-- 1 ron ron 183086 Oct 12 08:52 gl.c
-rw-rw-r-- 1 ron ron 156102 Oct  7 17:46 gl.h
ron@x570:~/source/xgs/gl$ sed '92!d' gl.c
  _glptr_glGenerateMipmap = (PFN_glGenerateMipmap)GalogenGetProcAddress("glGenerateMipmap");

In the source I pulled from git, it looks like this would be on line 62:

#define GalogenGetProcAddress(name) (*glXGetProcAddressARB)((const GLubyte*)name)

If I remove the "ARB" part and try to compile, I get this:

[ 97%] Building CXX object CMakeFiles/xgs.dir/emulator/main.cc.o
[100%] Linking CXX executable xgs
/usr/bin/ld: gl/libgl.a(gl.c.o): in function `_impl_glIsVertexArray':
gl.c:(.text+0x17): undefined reference to `glXGetProcAddress'
/usr/bin/ld: gl/libgl.a(gl.c.o): in function `_impl_glBindVertexArray':
gl.c:(.text+0x49): undefined reference to `glXGetProcAddress'
/usr/bin/ld: gl/libgl.a(gl.c.o): in function `_impl_glFlushMappedBufferRange':
gl.c:(.text+0x84): undefined reference to `glXGetProcAddress'
/usr/bin/ld: gl/libgl.a(gl.c.o): in function `_impl_glRenderbufferStorageMultisample':
gl.c:(.text+0xd0): undefined reference to `glXGetProcAddress'
/usr/bin/ld: gl/libgl.a(gl.c.o): in function `_impl_glGenerateMipmap':
gl.c:(.text+0x113): undefined reference to `glXGetProcAddress'
/usr/bin/ld: gl/libgl.a(gl.c.o):gl.c:(.text+0x157): more undefined references to `glXGetProcAddress' follow
collect2: error: ld returned 1 exit status
make[2]: *** [CMakeFiles/xgs.dir/build.make:100: xgs] Error 1
make[1]: *** [CMakeFiles/Makefile2:316: CMakeFiles/xgs.dir/all] Error 2
make: *** [Makefile:84: all] Error 2

As for wanting to try xgs, I thought it was an interesting project and noticed you had it working for the Raspberry Pi (which is what I was looking for) but thought it would be nice to have it running on my main Linux workstation as well.

Thanks again for all your help!

-Ron