Update example_ctrsm.c

[LocutusOfBorg]

Fixup a failure due to

[ 16%] Building C object CMakeFiles/example_ctrsm.dir/example_ctrsm.c.o In file included from /usr/include/CL/cl.h:20,
from /usr/include/clBLAS.h:35,
from /tmp/example_ctrsm.c:25:
/usr/include/CL/cl_version.h:22:9: note: '#pragma message: cl_version.h: CL_TARGET_OPENCL_VERSION is not defined. Defaulting to 300 (OpenCL 3.0)'
22 | #pragma message("cl_version.h: CL_TARGET_OPENCL_VERSION is not defined. Defaulting to 300 (OpenCL 3.0)")
| ^~~~~~~
/tmp/example_ctrsm.c: In function 'main':
/tmp/example_ctrsm.c:95:48: error: passing argument 2 of 'clGetPlatformIDs' from incompatible pointer type [-Wincompatible-pointer-types]
95 | err = clGetPlatformIDs(sizeof( platform ), &platform, NULL);
| ^~~~~~~~~
| |
| struct _cl_platform_id ***
/usr/include/CL/cl.h:956:35: note: expected 'struct _cl_platform_id **' but argument is of type 'struct _cl_platform_id ***'
956 | cl_platform_id * platforms,
| ~~~~~~~~~~~~~~~~~^~~~~~~~~
/tmp/example_ctrsm.c:114:5: warning: 'clCreateCommandQueue' is deprecated [-Wdeprecated-declarations]
114 | queue = clCreateCommandQueue(ctx, device, 0, &err);
| ^~~~~
/usr/include/CL/cl.h:1914:1: note: declared here
1914 | clCreateCommandQueue(cl_context context,
| ^~~~~~~~~~~~~~~~~~~~

[anbe42]

That patch makes platform an undefined pointer that gets written to ...

Maybe this is the intended behavior:

...
cl_platform_id platform;
...
err = clGetPlatformIDs(1, &platform, NULL);
...
err = clGetDeviceIDs(platform, CL_DEVICE_TYPE_CPU, 1, &device, NULL);
...
props[1] = (cl_context_properties)platform;
...

(completely untested)

[LocutusOfBorg]

I don't honestly know, I just checked some examples and came out with something building. They are examples so I didn't care too much about sanity

[LocutusOfBorg]

http://codesearch.debian.net/search?q=clGetPlatformIDs&literal=1

[anbe42]

https://salsa.debian.org/science-team/clblas/-/blob/debian/master/debian/patches/fix-cl_platform_id-usage.patch?ref_type=heads

this brings cl_platform_id usage in example_ctrsm.c in line with the other clblas samples

[LocutusOfBorg]

ok pushed thanks!