libclc/amdgcn: prepare-builtins.cpp.o: undefined reference to symbol '_ZN4llvm7parseIRENS_15MemoryBufferRefERNS_12SMDiagnosticERNS_11LLVMContextENS_15ParserCallbacksE'

[illwieckz]

I'm trying to build libclc from llvmorg-18.1.5 tag and I get this linkage error:

BUILDING amdgcn-mesa-mesa3d
	DEVICE: tahiti ( pitcairn;verde;oland;hainan;bonaire;kabini;kaveri;hawaii;mullins;tonga;tongapro;iceland;carrizo;fiji;stoney;polaris10;polaris11;gfx602;gfx705;gfx805;gfx900;gfx902;gfx904;gfx906;gfx908;gfx909;gfx90a;gfx90c;gfx940;gfx941;gfx942;gfx1010;gfx1011;gfx1012;gfx1013;gfx1030;gfx1031;gfx1032;gfx1033;gfx1034;gfx1035;gfx1036;gfx1100;gfx1101;gfx1102;gfx1103;gfx1150;gfx1151;gfx1200;gfx1201 )
BUILDING r600--
	DEVICE: cedar ( palm;sumo;sumo2;redwood;juniper )
	DEVICE: cypress ( hemlock )
	DEVICE: barts ( turks;caicos )
	DEVICE: cayman ( aruba )
BUILDING spirv-mesa3d-
	DEVICE: none (  )
BUILDING spirv64-mesa3d-
	DEVICE: none (  )
-- Configuring done (0.2s)
-- Generating done (0.0s)
-- Build files have been written to: llvm-project/libclc/build
[1/65] Linking CXX executable prepare_builtins
FAILED: prepare_builtins 
: && /usr/bin/c++ -fno-lto -O3 -DNDEBUG -fno-lto     -Wl,--gc-sections CMakeFiles/prepare_builtins.dir/utils/prepare-builtins.cpp.o -o prepare_builtins  -Wl,-rpath,"\$ORIGIN/../lib"  install/lib/libLLVMBitWriter.so.18.1  install/lib/libLLVMBitReader.so.18.1  install/lib/libLLVMCore.so.18.1  install/lib/libLLVMSupport.so.18.1 && :
/usr/bin/ld: CMakeFiles/prepare_builtins.dir/utils/prepare-builtins.cpp.o: undefined reference to symbol '_ZN4llvm7parseIRENS_15MemoryBufferRefERNS_12SMDiagnosticERNS_11LLVMContextENS_15ParserCallbacksE'
/usr/bin/ld: install/lib/../lib/../lib/libLLVMIRReader.so.18.1: error adding symbols: DSO missing from command line

The error is very similar to #62018:

• libclc/amdgcn: prepare-builtins.cpp.o: undefined reference to symbol '_ZN4llvm2cl6Option11addArgumentEv' #62018

I'm working on a patch.

[illwieckz]

It looks like a variant of the patch has been merged in main very recently:

• 61efea7

diff --git a/libclc/CMakeLists.txt b/libclc/CMakeLists.txt
index 9236f09d3667..2d000cf5cad8 100644
--- a/libclc/CMakeLists.txt
+++ b/libclc/CMakeLists.txt
@@ -113,9 +119,10 @@ set(LLVM_LINK_COMPONENTS
   BitReader
   BitWriter
   Core
+  IRReader
   Support
 )

It would be good to backport this to then LLVM 18 version.

On my end only this part (adding IRReader to LLVM_LINK_COMPONENTS) is enough to fix the libclc build.

[illwieckz]

Fixed by #91553:

• release/18.x: [libclc] Fix linking against libIRReader #91553