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

[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
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

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