[Libclc-dev] opencl-example: didn't compile (run) with latest LLVM git (for some days)

[Jan Vesely via Libclc-dev]

adding mesa-dev. This is not really related to libclc.

On Wed, 2017-09-20 at 12:50 +0200, Dieter Nützel via Libclc-dev wrote:
> Worked OK with older version (for me latest was #6c9f36933c5) but with 
> your 'clover: Fix build after LLVM r313390' reverted.
> 
> Now I get this during compilation tries:
> 
> /opt/opencl-example> make
> gcc -o hello_world hello_world.o cl_simple.o cl_util.o -L/usr/local/lib 
> -lOpenCL
> /usr/local/lib64/libOpenCL.so: undefined reference to 
> `llvm::LLVMContext::getDiagnosticHandler() const at LLVM_6.0'
> /usr/local/lib64/libOpenCL.so: undefined reference to 
> `llvm::isKnownNonNull(llvm::Value const*)@LLVM_6.0'
> /usr/local/lib64/libOpenCL.so: undefined reference to 
> `llvm::DIBuilder::createCompileUnit(unsigned int, llvm::DIFile*, 
> llvm::StringRef, bool, llvm::StringRef, unsigned int, llvm::StringRef, 
> llvm::DICompileUnit::DebugEmissionKind, unsigned long, bool, 
> bool)@LLVM_6.0'

This is odd, this function is pretty old.

> /usr/local/lib64/libOpenCL.so: undefined reference to 
> `llvm::LLVMContext::setDiagnosticHandler(void (*)(llvm::DiagnosticInfo 
> const&, void*), void*, bool)@LLVM_6.0'
> collect2: error: ld returned 1 exit status
> make: *** [Makefile:10: hello_world] Fehler 1
> 
> Greetings,
> Dieter
> 
> For reference (running '/opt/amdgpu-pro/bin/clinfo'):
> 
> /opt/opencl-example> /opt/amdgpu-pro/bin/clinfo
> /opt/amdgpu-pro/bin/clinfo: /usr/local/lib64/libOpenCL.so.1: no version 
> information available (required by /opt/amdgpu-pro/bin/clinfo)
> /opt/amdgpu-pro/bin/clinfo: /usr/local/lib64/libOpenCL.so.1: no version 
> information available (required by /opt/amdgpu-pro/bin/clinfo)
> ATTENTION: default value of option mesa_glthread overridden by 
> environment.
> ATTENTION: default value of option radeonsi_assume_no_z_fights 
> overridden by environment.
> ATTENTION: default value of option radeonsi_commutative_blend_add 
> overridden by environment.
> ATTENTION: default value of option mesa_glthread overridden by 
> environment.
> Number of platforms:                             1
>    Platform Profile:                              FULL_PROFILE
>    Platform Version:                              OpenCL 1.1 Mesa 
> 17.3.0-devel (git-94fef19509)
>    Platform Name:                                 Clover
>    Platform Vendor:                               Mesa
>    Platform Extensions:                           cl_khr_icd
> 
> 
>    Platform Name:                                 Clover
> Number of devices:                               1
>    Device Type:                                   CL_DEVICE_TYPE_GPU
>    Vendor ID:                                     1002h
>    Max compute units:                             36
>    Max work items dimensions:                     3
>      Max work items[0]:                           256
>      Max work items[1]:                           256
>      Max work items[2]:                           256
>    Max work group size:                           256
>    Preferred vector width char:                   16
>    Preferred vector width short:                  8
>    Preferred vector width int:                    4
>    Preferred vector width long:                   2
>    Preferred vector width float:                  4
>    Preferred vector width double:                 2
>    Native vector width char:                      16
>    Native vector width short:                     8
>    Native vector width int:                       4
>    Native vector width long:                      2
>    Native vector width float:                     4
>    Native vector width double:                    2
>    Max clock frequency:                           1411Mhz
>    Address bits:                                  64
>    Max memory allocation:                         6010904166
>    Image support:                                 No
>    Max size of kernel argument:                   1024
>    Alignment (bits) of base address:              1024
>    Minimum alignment (bytes) for any datatype:    128
>    Single precision floating point capability
>      Denorms:                                     No
>      Quiet NaNs:                                  Yes
>      Round to nearest even:                       Yes
>      Round to zero:                               No
>      Round to +ve and infinity:                   No
>      IEEE754-2008 fused multiply-add:             No
>    Cache type:                                    None
>    Cache line size:                               0
>    Cache size:                                    0
>    Global memory size:                            8587005952
>    Constant buffer size:                          2147483647
>    Max number of constant args:                   16
>    Local memory type:                             Scratchpad
>    Local memory size:                             32768
> /opt/amdgpu-pro/bin/clinfo: relocation error: 
> /usr/local/lib64/libOpenCL.so.1: symbol 
> _ZN4llvm11LLVMContext20setDiagnosticHandlerEPFvRKNS_14DiagnosticInfoEPvES4_b, 
> version LLVM_6.0 not defined in file libLLVM-6.0svn.so with link time 
> reference

this looks like libLLVM-6.0svn.so is an older version than what you
built clover against. Did you rebuild and reinstall llvm after r313390?

Jan

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