[Bf-cycles] OSL status

[David]

Hm, I believe I must be doing something wrong, but I can't figure
out what.  testshade seems to work, here is the result
of OSL make test:

"""
75% tests passed, 16 tests failed out of 63

Total Test time (real) =  18.74 sec

The following tests FAILED:
	  6 - cellnoise (Failed)
	 15 - geomath (Failed)
	 31 - noise (Failed)
	 32 - pnoise (Failed)
	 33 - oslc-err-paramdefault (Failed)
	 36 - spline (Failed)
	 41 - struct-err (Failed)
	 46 - texture-alpha (Failed)
	 47 - texture-blur (Failed)
	 48 - texture-field3d (Failed)
	 49 - texture-firstchannel (Failed)
	 50 - texture-interp (Failed)
	 51 - texture-simple (Failed)
	 52 - texture-width (Failed)
	 53 - texture-withderivs (Failed)
	 54 - texture-wrap (Failed)
"""

These failures seem to be caused by something else though,
the test framework doesn't seem to find oiio.  Running them
by hand with OPENIMAGEIOHOME=/usr/local I get no errors.

I have now tried building OSL with clang and llvm-gcc-4.2
with the same result.  With llvm-gcc-4.5 it does not build
at all (but this is of course unrelated to cycles):

"""
Generating llvm_ops.bc.cpp
/usr/bin/llvm-as: /home/david/src/OpenShadingLanguage/build/linux64/liboslexec/llvm_ops.s:1:2: error: expected top-level entity
	.file	"llvm_ops.cpp"
	^
make[3]: *** [liboslexec/llvm_ops.bc.cpp] Error 1
"""

I think I might be giving up for now, as I am really happy already
with cycles without OSL :)


On May 14, 2011, at 2:43 PM, Brecht Van Lommel wrote:

> Hi David,
> 
> Thanks for the patch, committed.
> 
> OSL works here on Mac, and I've had it working on Linux as well. Does
> the error you have also show up when running the OSL testshade
> application? It seems related to GCC / LLVM, I'm using GCC 4.2 & 4.4
> with LLVM 2.8. Somehow LLVM has to find the symbol, in the library
> compiled by GCC, not sure why that goes wrong here.
> 
> Brecht.
> 
> On Sat, May 14, 2011 at 3:53 AM, erwin94 <erwin94 at gmx.net> wrote:
>> Hi,
>> 
>> I just wanted to ask what the status of the OSL shading system is.
>> 
>> While trying it, I encountered some build errors (fixes in the
>> attached patch), and, when trying to render I get the following
>> error:
>> 
>> LLVM ERROR: Program used external function 'osl_allocate_closure_component' which could not be resolved!
>> 
>> I tried to understand why that fails, but couldn't find any reason,
>> so I wanted to ask before investigating further.
>> 
>> (the function seems to exist:
>> $ nm /usr/local/lib/liboslexec.so | grep allocate_closure
>> 00000000000d2700 T osl_allocate_closure_component
>> )
>> 
>> till then, David.
>> 
>> 
>> P.S:
>> System: Ubuntu 10.10 x86_64
>> OSL from git (18f5ab52), built against ubuntu llvm
>> 
>> --
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>> 
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