[Mesa-dev] Build fail since configure.ac: rework llvm libs handling for 3.9+

[Emil Velikov]

On 16 October 2017 at 23:32, Dieter Nützel <Dieter at nuetzel-hh.de> wrote:
> Am 16.10.2017 20:13, schrieb Andy Furniss:
>>
>> Emil Velikov wrote:
>>>
>>> On 16 October 2017 at 03:22, Jan Vesely <jan.vesely at rutgers.edu> wrote:
>>>>
>>>> On Sun, 2017-10-15 at 00:00 +0100, Andy Furniss wrote:
>>>>>
>>>>> Andy Furniss wrote:
>>>>>>
>>>>>> Since
>>>>>>
>>>>>> commit 13a53c4f5cdd664fd155c9e78fb46a4387af006c
>>>>>> Author: Emil Velikov <emil.velikov at collabora.com>
>>>>>> Date:   Thu Oct 5 11:19:05 2017 +0100
>>>>>>
>>>>>>       configure.ac: rework llvm libs handling for 3.9+
>>>>>>
>>>>>> I am getting 00s of
>>>>>>
>>>>>> .... /mesa/src/amd/common/..... undefined reference to LLVM......
>>>>>>
>>>>>> Using git llvm have tried with -DLLVM_APPEND_VC_REV=OFF
>>>>>>
>>>>>> My llvm config =
>>>>>>
>>>>>> cmake -DCMAKE_INSTALL_PREFIX=/usr -DCMAKE_BUILD_TYPE=Release
>>>>>> -DLLVM_TARGETS_TO_BUILD="host;AMDGPU" -DLLVM_ENABLE_ASSERTIONS=ON
>>>>>> -DLLVM_BUILD_LLVM_DYLIB=ON
>>>>>
>>>>>
>>>>> Build is OK with llvm built with -DLLVM_LINK_LLVM_DYLIB=ON
>>>>
>>>>
>>>> THis is weird. that option should only set whether llvm executables are
>>>> dynamically linked. is the llvm-config output different when you toggle
>>>> this setting?
>>>>
>>> Precisely what I was wondering as well.
>>>
>>> Andy can you please share the output of the following commands across
>>> your build combinations:
>>> llvm-config --link-shared --libs bitwriter
>>> llvm-config --link-static --libs bitwriter
>>> llvm-config --link-static --system-libs
>>
>>
>> On a "bad" build (-DLLVM_BUILD_LLVM_DYLIB=ON) I get
>>
>> andy [~]$ llvm-config --link-shared --libs bitwriter
>> llvm-config: error: missing: /usr/lib/libLLVMDemangle.so
>> llvm-config: error: missing: /usr/lib/libLLVMSupport.so
>> llvm-config: error: missing: /usr/lib/libLLVMBinaryFormat.so
>> llvm-config: error: missing: /usr/lib/libLLVMCore.so
>> llvm-config: error: missing: /usr/lib/libLLVMBitReader.so
>> llvm-config: error: missing: /usr/lib/libLLVMMC.so
>> llvm-config: error: missing: /usr/lib/libLLVMMCParser.so
>> llvm-config: error: missing: /usr/lib/libLLVMObject.so
>> llvm-config: error: missing: /usr/lib/libLLVMProfileData.so
>> llvm-config: error: missing: /usr/lib/libLLVMAnalysis.so
>> llvm-config: error: missing: /usr/lib/libLLVMBitWriter.so

These here indicate that something in LLVM broke. Please report it
ASAP so that we don't get a LLVM release with this bug.

>> andy [~]$
>> andy [~]$ llvm-config --link-static --libs bitwriter
>> -lLLVMBitWriter -lLLVMAnalysis -lLLVMProfileData -lLLVMObject
>> -lLLVMMCParser -lLLVMMC -lLLVMBitReader -lLLVMCore -lLLVMBinaryFormat
>> -lLLVMSupport -lLLVMDemangle
>> andy [~]$
>> andy [~]$ llvm-config --link-static --system-libs
>> -lrt -ldl -lcurses -lpthread -lz -lm
>>
>> On a "good" (-DLLVM_LINK_LLVM_DYLIB=ON) I get
>
>
> With both:
> -DLLVM_BUILD_LLVM_DYLIB=ON and -DLLVM_LINK_LLVM_DYLIB=ON
>
Something's a bit strange:



>> andy [~]$ llvm-config --link-shared --libs bitwriter
>> -lLLVM-6.0svn
>> andy [~]$ llvm-config --link-static --libs bitwriter
>> -lLLVMBitWriter -lLLVMAnalysis -lLLVMProfileData -lLLVMObject
>> -lLLVMMCParser -lLLVMMC -lLLVMBitReader -lLLVMCore -lLLVMBinaryFormat
>> -lLLVMSupport -lLLVMDemangle
>> andy [~]$ llvm-config --link-static --system-libs
>> -lrt -ldl -lcurses -lpthread -lz -lm
>
>
> I get mostly the same:
>
> Radeon/Mesa> llvm-config --link-shared --libs bitwriter
> -lLLVM-6.0svn
> Radeon/Mesa> llvm-config --link-static --libs bitwriter
> -lLLVMBitWriter -lLLVMAnalysis -lLLVMProfileData -lLLVMObject -lLLVMMCParser
> -lLLVMMC -lLLVMBitReader -lLLVMCore -lLLVMBinaryFormat -lLLVMSupport
> -lLLVMDemangle
> Radeon/Mesa> llvm-config --link-static --system-libs
> -lrt -ldl -ltinfo -lpthread -lz -lm
>           ^^^^^^^^
>
> Dieter