JonPsson1 wrote:

Patch updated to handle weak symbols as well, by passing the VarDecl to 
getMinGlobalAlign() so that the SystemZ implementation of it can inspect the VD.

Clang builds fine and it seems to be working, but I however find that the tests 
don't build anymore and not sure exactly what is the best way forward here. I 
get:

```
ninja check-clang
[2/201] Linking CXX executable tools/clang/unittests/Basic/BasicTests
FAILED: tools/clang/unittests/Basic/BasicTests 
: && /home/ijonpan/gcc-latest/bin/g++ -fPIC -fno-semantic-interposition 
-fvisibility-inlines-hidden -Werror=date-time -fno-lifetime-dse -Wall -Wextra 
-Wno-unused-parameter -Wwrite-strings -Wcast-qual 
-Wno-missing-field-initializers -pedantic -Wno-long-long -Wimplicit-fallthrough 
-Wno-maybe-uninitialized -Wno-nonnull -Wno-class-memaccess -Wno-redundant-move 
-Wno-pessimizing-move -Wno-noexcept-type -Wdelete-non-virtual-dtor 
-Wsuggest-override -Wno-comment -Wno-misleading-indentation 
-Wctad-maybe-unsupported -fdiagnostics-color -ffunction-sections 
-fdata-sections -fno-common -Woverloaded-virtual -fno-strict-aliasing -O3 
-DNDEBUG -Wl,--gc-sections 
tools/clang/unittests/Basic/CMakeFiles/BasicTests.dir/CharInfoTest.cpp.o 
tools/clang/unittests/Basic/CMakeFiles/BasicTests.dir/DarwinSDKInfoTest.cpp.o 
tools/clang/unittests/Basic/CMakeFiles/BasicTests.dir/DiagnosticTest.cpp.o 
tools/clang/unittests/Basic/CMakeFiles/BasicTests.dir/FileEntryTest.cpp.o 
tools/clang/unittests/Basic/CMakeFiles/BasicTests.dir/FileManagerTest.cpp.o 
tools/clang/unittests/Basic/CMakeFiles/BasicTests.dir/LineOffsetMappingTest.cpp.o
 tools/clang/unittests/Basic/CMakeFiles/BasicTests.dir/SanitizersTest.cpp.o 
tools/clang/unittests/Basic/CMakeFiles/BasicTests.dir/SarifTest.cpp.o 
tools/clang/unittests/Basic/CMakeFiles/BasicTests.dir/SourceManagerTest.cpp.o 
-o tools/clang/unittests/Basic/BasicTests  lib/libLLVMSupport.a  
lib/libLLVMSupport.a  lib/libllvm_gtest_main.a  lib/libllvm_gtest.a  
lib/libclangBasic.a  lib/libclangLex.a  lib/libLLVMTestingSupport.a  
lib/libclangBasic.a  lib/libLLVMFrontendOpenMP.a  lib/libLLVMScalarOpts.a  
lib/libLLVMAggressiveInstCombine.a  lib/libLLVMInstCombine.a  
lib/libLLVMFrontendOffloading.a  lib/libLLVMTransformUtils.a  
lib/libLLVMAnalysis.a  lib/libLLVMProfileData.a  lib/libLLVMSymbolize.a  
lib/libLLVMDebugInfoPDB.a  lib/libLLVMDebugInfoMSF.a  lib/libLLVMDebugInfoBTF.a 
 lib/libLLVMDebugInfoDWARF.a  lib/libLLVMObject.a  lib/libLLVMIRReader.a  
lib/libLLVMBitReader.a  lib/libLLVMAsmParser.a  lib/libLLVMCore.a  
lib/libLLVMRemarks.a  lib/libLLVMBitstreamReader.a  lib/libLLVMMCParser.a  
lib/libLLVMMC.a  lib/libLLVMDebugInfoCodeView.a  lib/libLLVMTextAPI.a  
lib/libLLVMBinaryFormat.a  lib/libLLVMTargetParser.a  lib/libllvm_gtest.a  
lib/libLLVMSupport.a  -lrt  -ldl  -lm  /usr/lib64/libz.so  
/usr/lib64/libzstd.so  /usr/lib64/libtinfo.so  lib/libLLVMDemangle.a  -lpthread 
&& :
/usr/bin/ld: lib/libclangBasic.a(SystemZ.cpp.o): in function 
`clang::targets::SystemZTargetInfo::getMinGlobalAlign(unsigned long, 
clang::VarDecl const*) const':
SystemZ.cpp:(.text._ZNK5clang7targets17SystemZTargetInfo17getMinGlobalAlignEmPKNS_7VarDeclE+0x28):
 undefined reference to `clang::Decl::getASTContext() const'
/usr/bin/ld: 
SystemZ.cpp:(.text._ZNK5clang7targets17SystemZTargetInfo17getMinGlobalAlignEmPKNS_7VarDeclE+0x36):
 undefined reference to `clang::VarDecl::hasDefinition(clang::ASTContext&) 
const'
/usr/bin/ld: 
SystemZ.cpp:(.text._ZNK5clang7targets17SystemZTargetInfo17getMinGlobalAlignEmPKNS_7VarDeclE+0x5e):
 undefined reference to `clang::ValueDecl::isWeak() const'
collect2: error: ld returned 1 exit status
```


https://github.com/llvm/llvm-project/pull/73511
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