I need an opengl loader, extension or core. I know I am suppose to use gl code inside after gl context has been called. My problem is actually setting up this opengl development environment.
I tried glew, and failed horribly.
Next one on my list is gl load generator. It generates specific opengl core, so all i have to do is include them to use those core functions.
However, I can not get this to install and feel like giving up and moving onto gl3w soon...
This is the error I am recieving when I try to make a simple file:
C:\MinGW64\glLoadGen_2_0_2>lua LoadGen.lua -style=pointer_c -spec=gl -version=3.
3 -profile=core core_3_3
lua: ./modules/Styles.lua:37: attempt to index local 'lfs' (a boolean value)
stack traceback:
./modules/Styles.lua:37: in main chunk
[C]: in function 'require'
./modules/GetOptions.lua:28: in main chunk
[C]: in function 'require'
LoadGen.lua:17: in main chunk
[C]: ?
C:\MinGW64\glLoadGen_2_0_2>cd C:\MinGW64\glLoadGen_2_0_2
Environment:
Windows 7 64 bit, running cmd as adminstrator, luafilesystem 1.5.0-1
There's a little syntax mistake. However, if you did some researches on this you would have found this Ticket
You have to replace
local lfs = pcall(require, "lfs")
if(lfs and lfs.attributes("modules/UserStyles.lua", "mode") == "file") then
with
local status, lfs = pcall(require, "lfs")
if(status and lfs.attributes("modules/UserStyles.lua", "mode") == "file") then
This fixes the errors.
Cheers
I get the exact same error message on Ubuntu 14.04 with default lua with glLoadGen_2_0_2. The only way I have been able to use glLoadGen is to download the glLoadGen_1_9 distribution and run the exact same lua command. It generates the gl .h and .c files fine. I'm assuming something is badly broken in the glLoadGen_2_0_2 distribution to get identical errors in such very different environments.
Seems it is trying to use mingw compiler suite to do the build. You either need to install mingw, or you need to tell luarocks (or whatever command you're using for the installation) how to find it, or you need to tell that command to use MSVC (or whatever build tool chain you want to use).
Related
I am trying to use ocamldebug with my project, to understand why a 3rd party lib I'm using is not behaving the way I expected.
https://ocaml.org/manual/debugger.html
The OCaml debugger is invoked by running the program ocamldebug with the name of the bytecode executable file as first argument
I have added (modes byte exe) to my dune file.
When I run dune build I can see the bytecode file output, alongside the exe, as _build/default/bin/cli.bc
When I pass this to ocamldebug I get the following error:
ocamldebug _build/default/bin/cli.bc
OCaml Debugger version 4.12.0
(ocd) r
Loading program... done.
Fatal error: debugger does not support channel locks
Lost connection with process 33035 (active process)
between time 170000 and time 180000
Restart from time 170000 and try to get closer of the problem ? (y or n)
If I choose y the console seems to hang indefinitely.
I found the source of the error here:
https://github.com/ocaml/ocaml/blob/f68acd1a618ac54790a8347fad466084f15a9a9e/runtime/debugger.c#L144
/* The code in this file does not bracket channel I/O operations with
Lock and Unlock, so fail if those are not no-ops. */
if (caml_channel_mutex_lock != NULL ||
caml_channel_mutex_unlock != NULL ||
caml_channel_mutex_unlock_exn != NULL)
caml_fatal_error("debugger does not support channel locks");
...but I don't know what might be triggering it.
My project is using cmdliner and lwt ...I think at this early point of execution it hasn't hit any lwt code though.
Is ocamldebug incompatible with cmdliner?
If that's the case then I will need to make a new entrypoint just for debugging I guess. (currently the bin/cli is the only executable artefact in my project, the code I need to debug is all under lib/s)
It looks like that the OCaml debugger is broken for your version of macOS. Please, report the issue to the OCaml issue tracker including the detailed information on your system. I can't reproduce it on my machine, but I am using a pretty old version of macOS (10.11.6) and I have the 4.12 debugger working flawlessly.
As a workaround, try using an older version of OCaml, as this channel lock test was introduced very recently you can install any version prior to 4.12,
opam switch create 4.11.0
eval $(opam env)
Then, do not forget to rebuild your project (previously installing the required dependencies),
opam install lwt cmdliner
dune build
and then you can use the debugger to your taste.
I have an OCaml program that worked fine on Ubuntu 16 but when recompiled and run on Ubuntu 20 I get the following error:-
$ ocamldebug ./linearizer
OCaml Debugger version 4.08.1
(ocd) r
Loading program... done.
Time: 89534
Program end.
Uncaught exception: Sys_error "Illegal seek"
(ocd) b
Time: 89533 - pc: 624888 - module Netaccel_link
No source file for Netaccel_link.
I thought this was due to missing dev libraries but:-
$ sudo apt install libocamlnet-ocaml-dev
Reading package lists... Done
Building dependency tree
Reading state information... Done
libocamlnet-ocaml-dev is already the newest version (4.1.6-1build6).
0 upgraded, 0 newly installed, 0 to remove and 20 not upgraded.
What setup step am I missing on Ubuntu 20?
This looks like a regression bug in libocamlnet and you should report an issue there or, I am a bit pessimistic that you will get any response, you can try to debug the issue yourself.
The problem that you are facing has nothing to do with missing libraries (they will be reported during installation or, if the package is broken, end up in linker errors). It may result, however, from some misconfiguration of the system. If that is true, then you're lucky as you can fix it yourself.
I will give you some advice that might help you in debugging this issue. For more, please try using discuss.ocaml.org as a more suitable media (SO doesn't favor this kind of a discussion and we might get deleted by admins).
The illegal seek exception is thrown when the seek operation is applied on a non-regular file, aka ESPIPE Unix error. So check your inputs. It could be that what was previously regarded as a file in Ubuntu is now a pipe or a socket.
Try to use ltrace or strace to pinpoint the culprit e.g.,
ltrace ./linearizer
or, if it overwhelms you, try strace
strace ./linearizer
Instead of using ocamldebug you can use plain gdb. You can use gdb's interfaces to provide the path to the source code (though most likely it won't work since ocamlnet is not compiled with debug information). I believe that it will give you a more meaningful backtrace.
Instead of using the system installation try using opam. Install your dependencies with opam and try older versions as well as newer versions of the OCaml compiler. Also, try different versions of ocamlnet. Ideally, try to reproduce the environment that used to work for you.
When nothing else works, you can use objdump -d and look at the disassembly of your binary. OCaml is using a pretty readable and intuitive name mangling scheme (<module_name>__<function_name>_<uid>), so you can easily find the source code (search for <module_name>.ml file and look for the <function_name> there)
Finally, just use docker or any other container to run your application. Consider switching from ocamlnet to something more modern and supported.
I am getting an error:
"Error occurred during initialization of VM
Unable to load native library: Can't find dependent libraries"
The error arises when I try to execute my exe file.
I have created exe file through pyinstaller on a django application. Application uses pylucine library. I think it may be the issue of error.
How to fix the error?
Since I can't be certain given you've provided very few details here is a shot in the dark to help solve your problem:
First, try removing the jvm.dll file that gets packaged with the pyinstaller -D youmodule.py command (for now work with the directory command rather than -F option). The reason why is here.
With that jvm.dll file gone, you should start seeing the actual error code - and with that the java class or dependency that isn't being loaded.
If it's a java class that isn't being properly loaded then you know instantly it must not be correcly represented in the classpath environment variable and you should do everything in your power to make sure it is:
e.g.: os.environ['CLASSPATH'] += 'the/path/to/the/jar'
Otherwise, consider bulking up your question with more details, especially if you can get a more meaningful error output.
I had the same error trying to run a .exe built with PyInstaller through wine.
My problem went away by adding C:\Program Files\Java\ [your jdk version here] \jre\bin\server to the PATH environment variable in wine - I suppose it might be the same in Windows.
It also reappeared if I tried to build with C:\Program Files\Java\ [your jdk version here] \jre\bin\server in my PATH, so I had to build without it and then append it before running it (I have no explanation as to why this happens).
My goal is to create a package in R with C++ code: So my questions is how?
I am following the tutorial http://www.stat.columbia.edu/~gelman/stuff_for_blog/AlanRPackageTutorial.pdf on creating an R package containing C++ code. The specific code Im trying to compile and package is exactly as described in the tutorial.
R CMD SHLIB seems to be working creating .dll file.
I can load in R using dyn.load() and test it on simulated data (as described in tutorial)
R CMD INSTALL is where the problem begins. I have done two things encountering two different errors supposedly related:
1) The tutorial says the NAMESPACE file is supposed to contain the code:
useDynLib(XDemo)
export(XDemoAutoC)
When it does R CMD INSTALL fail resulting in error:
Error in inDL(x,as.logical(local), as.logical(now),...): unable to
load shared object 'C:/.../libs/i386/XDemo.dll': Loadlibrary failure:
1% is not a valid Win32-program
2) Removing the above mentioned lines in NAMESPACE file will result in installation of package. I can succesfully load it in R but when I try to use the R function that makes a .C() call to the C++ written function I another error:
library(newpackage)
ls(package:newpackage)
[[1]] "XDemoAutoC"
Warning message:
In ls(package:newpackage) :
‘package:newpackage’ converted to character string
XDemoAutoC(c(1,2,3,4))
Error in .C("DemoAutoCor", OutVec = as.double(vector("numeric", OutLength)), :
C symbol name "DemoAutoCor" not in load table
Im running version R2.15.2 on windows 64-bit and using R64 bit.
I read the following post with a similar problem:
http://r.789695.n4.nabble.com/Include-C-DLL-error-in-C-symbol-name-not-in-load-table-td3464021.html
Except they mention nothing about the NAMESPACE-matter.
Also I read this post:
Problem with loading compiled c code in R x64 using dyn.load
So I am thinking: that based on the fact that I am able to use dyn.load() in Rx64 means that I have succesfully created x64 .dll. Assuming that the NAMESPACE file is supposed to be left as in the tutorial - hopefully fixing the >>not in load table<< error - this would mean I should focus on fixing problem one. This problem seems to be caused by something related to 32-bit. I have used Dependency Walker on the .dll file but I am not sure how to interpret the results
I really don't have any ideas on how to fix this problem so any suggestion on what to do would be welcome?
I think you are doing it wrong. Two quick suggestions:
Read the Writing R Extensions manual written to explain just this: writing R extensions including those with compiled code
Have a look at Rcpp which makes R and C++ extensions, including package building so much easier. Or so we think. Writing a package is as easy as calling Rcpp.package.skeleton(). The documentation in 1) still help.
That said, if R CMD INSTALL fails you may have some mixup in your $PATH. Never ever mix MinGW and Cygwin. Make sure no Cygwin DLLs are found when you build or call R. Path order matters greatly. See the manual for details.
I'm trying to profile a C++ application, that I did not write, to get a sense for where the major computation points are. I'm not a C++ expert and even less so C++ debugging/profiling expert. I believe I am running into a (common?) problem with dynamic libraries.
I compile link to Google CPU Profiler using (OS X, G++):
env LIBS=-lprofiler ./configure
make
make install
I then run profile the installed application (jags) with:
env CPUPROFILE=./jags.prof /usr/local/bin/jags regression.cmd
pprof /usr/local/bin/jags jags.prof
Unfortunately, I get the error:
pprof /usr/local/bin/jags jags.prof Can't exec "objdump":
No such file or directory at /usr/local/bin/pprof line 2833.
objdump /System/Library/Frameworks/Accelerate.framework/Versions/A/
Frameworks/vecLib.framework/Versions/A/libLAPACK.dylib: No such file or directory
The program dynamically links to libLAPACK.dylib. So prof does not seem to understand it (?). I thought about trying to statically link, but the documents associated with the program say that it is impossible to statically link in LAPACK or BLAS (two required libraries).
Is there a way to have the profiler ignore libLAPACK? I'm okay if it doesn't sample within libLAPACK. Or how might I get profiling to work?
This error was caused by jags being a shell script, that subsequently called profilable code.
pprof /usr/local/bin/REAL_EXEC jags.prof
fixes the problem.
I don't see a clean way to do it, but maybe there's a hacky workaround -- what happens if you hack the pprof perl script (or better a copy thereof;-), line 2834, so that instead of calling error it emits the message and then does return undef;?
If you're profiling on OSX, the Shark tool is really great as well. It's very simple to use, and has worked out of the box for me when I've tried it.