Update to Julia v0.7

[ranocha]

Locally on Kubuntu 18.04 with an Nvidia GPU, all tests pass for me. There is still one deprecation warning in line 140 of context.jl (https://github.com/JuliaGPU/OpenCL.jl/compare/master...ranocha:update_v07?expand=1#diff-6cc00ffb6d6452cf5b665d33b6f45a90R140). However, if I replace cfunction with @cfunction (and the argument type tuple accordingly to get f_ptr = @cfunction($payload, Nothing, (Ptr{Cchar}, Ptr{Cvoid}, Csize_t))), I get some errors:

OpenCL.Context constructor: Error During Test at /home/hendrik/.julia/dev/OpenCL/test/test_context.jl:24
  Got exception ErrorException("pointer_from_objref cannot be used on immutable objects") outside of a @test
  pointer_from_objref cannot be used on immutable objects
  Stacktrace:
   [1] error(::String) at ./error.jl:33
   [2] pointer_from_objref at ./pointer.jl:142 [inlined]
   [3] unsafe_convert(::Type{Ptr{OpenCL.cl.api.CL_user_data_tag}}, ::Base.RefValue{Base.CFunction}) at /home/hendrik/.julia/dev/OpenCL/src/api.jl:35
   [4] clCreateContext(::Ptr{Nothing}, ::Int64, ::Array{Ptr{Nothing},1}, ::Ptr{Nothing}, ::Base.CFunction, ::Base.RefValue{Int32}) at /home/hendrik/.julia/dev/OpenCL/src/api.jl:17
   [5] #Context#44(::Nothing, ::Nothing, ::Type, ::Array{OpenCL.cl.Device,1}) at /home/hendrik/.julia/dev/OpenCL/src/context.jl:141
   [6] (::getfield(Core, Symbol("#kw#Type")))(::NamedTuple{(:properties, :callback),Tuple{Nothing,Nothing}}, ::Type{OpenCL.cl.Context}, ::Array{OpenCL.cl.Device,1}) at ./none:0
   [7] #Context#45(::Nothing, ::Nothing, ::Type, ::OpenCL.cl.Device) at /home/hendrik/.julia/dev/OpenCL/src/context.jl:152
   [8] OpenCL.cl.Context(::OpenCL.cl.Device) at /home/hendrik/.julia/dev/OpenCL/src/context.jl:152
   [9] macro expansion at /home/hendrik/.julia/dev/OpenCL/test/test_context.jl:28 [inlined]
   [10] macro expansion at /home/hendrik/Downloads/julia07/usr/share/julia/stdlib/v0.7/Test/src/Test.jl:1079 [inlined]
   [11] macro expansion at /home/hendrik/.julia/dev/OpenCL/test/test_context.jl:25 [inlined]
   [12] macro expansion at /home/hendrik/Downloads/julia07/usr/share/julia/stdlib/v0.7/Test/src/Test.jl:1079 [inlined]
   [13] top-level scope at /home/hendrik/.julia/dev/OpenCL/test/test_context.jl:24
   [14] include at ./boot.jl:317 [inlined]
   [15] include_relative(::Module, ::String) at ./loading.jl:1038
   [16] include at ./sysimg.jl:29 [inlined]
   [17] include(::String) at /home/hendrik/.julia/dev/OpenCL/test/runtests.jl:1
   [18] top-level scope at none:0
   [19] include at ./boot.jl:317 [inlined]
   [20] include_relative(::Module, ::String) at ./loading.jl:1038
   [21] include(::Module, ::String) at ./sysimg.jl:29
   [22] include(::String) at ./client.jl:398
   [23] top-level scope at none:0
   [24] eval(::Module, ::Any) at ./boot.jl:319
   [25] exec_options(::Base.JLOptions) at ./logging.jl:317
   [26] _start() at ./client.jl:432
OpenCL.Context create_some_context: Error During Test at /home/hendrik/.julia/dev/OpenCL/test/test_context.jl:106
  Test threw exception OpenCL Error: Unable to create any OpenCL.Context, no devices worked
  Expression: cl.create_some_context() != nothing
  OpenCL Error: Unable to create any OpenCL.Context, no devices worked
  Stacktrace:
   [1] create_some_context() at /home/hendrik/.julia/dev/OpenCL/src/context.jl:311
   [2] macro expansion at /home/hendrik/.julia/dev/OpenCL/test/test_context.jl:29 [inlined]
   [3] macro expansion at /home/hendrik/Downloads/julia07/usr/share/julia/stdlib/v0.7/Test/src/Test.jl:1079 [inlined]
   [4] macro expansion at /home/hendrik/.julia/dev/OpenCL/test/test_context.jl:25 [inlined]
   [5] macro expansion at /home/hendrik/Downloads/julia07/usr/share/julia/stdlib/v0.7/Test/src/Test.jl:1079 [inlined]
   [6] top-level scope at /home/hendrik/.julia/dev/OpenCL/test/test_context.jl:24
OpenCL.Context create_some_context: Error During Test at /home/hendrik/.julia/dev/OpenCL/test/test_context.jl:107
  Test threw exception OpenCL Error: Unable to create any OpenCL.Context, no devices worked
  Expression: typeof(cl.create_some_context()) == cl.Context
  OpenCL Error: Unable to create any OpenCL.Context, no devices worked
  Stacktrace:
   [1] create_some_context() at /home/hendrik/.julia/dev/OpenCL/src/context.jl:311
   [2] macro expansion at /home/hendrik/.julia/dev/OpenCL/test/test_context.jl:30 [inlined]
   [3] macro expansion at /home/hendrik/Downloads/julia07/usr/share/julia/stdlib/v0.7/Test/src/Test.jl:1079 [inlined]
   [4] macro expansion at /home/hendrik/.julia/dev/OpenCL/test/test_context.jl:25 [inlined]
   [5] macro expansion at /home/hendrik/Downloads/julia07/usr/share/julia/stdlib/v0.7/Test/src/Test.jl:1079 [inlined]
   [6] top-level scope at /home/hendrik/.julia/dev/OpenCL/test/test_context.jl:24
Test Summary:                        | Pass  Error  Total
OpenCL.Context                       |   16      3     19
  OpenCL.Context constructor         |    1      1      2
  OpenCL.Context platform properties |   11            11
  OpenCL.Context create_some_context |           2      2
  OpenCL.Context parsing             |    4             4
ERROR: LoadError: LoadError: Some tests did not pass: 16 passed, 0 failed, 3 errored, 0 broken.
in expression starting at /home/hendrik/.julia/dev/OpenCL/test/test_context.jl:23
in expression starting at /home/hendrik/.julia/dev/OpenCL/test/runtests.jl:26
ERROR: Package OpenCL errored during testing

Thus, I've not changed this part and there is still a deprecation warning.

During the first using OpenCL, there are some deprecation warnings such as

┌ Warning: Deprecated syntax `implicit assignment to global variable `info``.
│ Use `global info` instead.
└ @ none:0
┌ Warning: Deprecated syntax `implicit assignment to global variable `info``.
│ Use `global info` instead.
└ @ none:0
┌ Warning: Deprecated syntax `implicit assignment to global variable `info``.
│ Use `global info` instead.
└ @ none:0
┌ Warning: Deprecated syntax `implicit assignment to global variable `info``.
│ Use `global info` instead.
└ @ none:0
┌ Warning: Deprecated syntax `implicit assignment to global variable `properties``.
│ Use `global properties` instead.
└ @ none:0
┌ Warning: Deprecated syntax `implicit assignment to global variable `properties``.
│ Use `global properties` instead.
└ @ none:0
┌ Warning: Deprecated syntax `implicit assignment to global variable `info``.
│ Use `global info` instead.
└ @ none:0
┌ Warning: Deprecated syntax `implicit assignment to global variable `info``.
│ Use `global info` instead.
└ @ none:0
┌ Warning: Deprecated syntax `implicit assignment to global variable `context``.
│ Use `global context` instead.
└ @ none:0
┌ Warning: Deprecated syntax `implicit assignment to global variable `context``.
│ Use `global context` instead.
└ @ none:0
┌ Warning: Deprecated syntax `implicit assignment to global variable `info``.
│ Use `global info` instead.
└ @ none:0
┌ Warning: Deprecated syntax `implicit assignment to global variable `info``.
│ Use `global info` instead.
└ @ none:0
┌ Warning: Deprecated syntax `implicit assignment to global variable `info``.
│ Use `global info` instead.
└ @ none:0
┌ Warning: Deprecated syntax `implicit assignment to global variable `info``.
│ Use `global info` instead.
└ @ none:0
┌ Warning: Deprecated syntax `implicit assignment to global variable `num_devices``.
│ Use `global num_devices` instead.
└ @ none:0
┌ Warning: Deprecated syntax `implicit assignment to global variable `num_devices``.
│ Use `global num_devices` instead.
└ @ none:0
┌ Warning: Deprecated syntax `implicit assignment to global variable `devices``.
│ Use `global devices` instead.
└ @ none:0
┌ Warning: Deprecated syntax `implicit assignment to global variable `devices``.
│ Use `global devices` instead.
└ @ none:0
┌ Warning: Deprecated syntax `implicit assignment to global variable `context``.
│ Use `global context` instead.
└ @ none:0
┌ Warning: Deprecated syntax `implicit assignment to global variable `context``.
│ Use `global context` instead.
└ @ none:0
┌ Warning: Deprecated syntax `implicit assignment to global variable `info``.
│ Use `global info` instead.
└ @ none:0
┌ Warning: Deprecated syntax `implicit assignment to global variable `info``.
│ Use `global info` instead.
└ @ none:0
┌ Warning: Deprecated syntax `implicit assignment to global variable `info``.
│ Use `global info` instead.
└ @ none:0
┌ Warning: Deprecated syntax `implicit assignment to global variable `info``.
│ Use `global info` instead.
└ @ none:0

[ranocha]

As in #159, Travis does not seem to respond...

[SimonDanisch]

I'll try to activate our gitlab ci today!

[ranocha]

There is an OutOfMemoryError on Travis (https://travis-ci.org/JuliaGPU/OpenCL.jl/jobs/413939671#L351) which I can't reproduce on my computer.

[ranocha]

This seems to be superseded by #169.