compile minix3 failed on centos8.5

[Leo Chen]

I have cross compiled minix3 source code for x86 on CentOS 8.5(on virtual machine)，but it failed. I checked and build dependencies were all installed.

Looking at the logs I see that it might have something to do with a failed directory creation in llvm, but I don't know anything about llvm.

If anyone has any leads, please let me know, I would greatly appreciate it.  

minix version : 3.4.0

git commit: 4db99f401

changes: after git clone to the local, nothing changes.

kernel: 4.18.0-348.7.1.el8_5.x86_64

gcc version: 8.5.0 20210514 (Red Hat 8.5.0-4) (GCC)

clang version: 12.0.1 (Red Hat 12.0.1-4.module_el8.5.0+1025+93159d6c)

full log was attached.

[Justin Handville]

The error is further up. It appears to be a problem with evaluating whether a unique pointer is populated in LLVM. The compiler you are using is more strict about implicit conversions to boolean.

dist/llvm/include/llvm/IR/ValueMap.h: In member function 'bool llvm::ValueMap<KeyT, ValueT, Config>::hasMD() const': dist/llvm/include/llvm/IR/ValueMap.h:104:31: error: cannot convert 'const std::unique_ptr<llvm::DenseMap<const llvm::Metadata*, llvm::TrackingMDRef> >' to 'bool' in return bool hasMD() const { return MDMap; } ^~~~~
Try patching this line as follows:

bool hasMD() const { return bool(MDMap); }
That is in line with a later patch. This has been fixed in the upstream version of LLVM.

[Justin Handville]

Sorry... my last line response was garbled by Google Groups formatting. I'll try again.

The error is further up. It appears to be a problem with evaluating whether a unique pointer is populated in LLVM. The compiler you are using is more strict about implicit conversions to boolean.

dist/llvm/include/llvm/IR/ValueMap.h: In member function 'bool llvm::ValueMap<KeyT, ValueT, Config>::hasMD() const': 

dist/llvm/include/llvm/IR/ValueMap.h:104:31: error: cannot convert 'const std::unique_ptr<llvm::DenseMap<const llvm::Metadata*, llvm::TrackingMDRef> >' to 'bool' in 

return bool hasMD() const { return MDMap; }

Try patching this line as follows:

bool hasMD() const { return bool(MDMap); }

That is in line with a later patch. This has been fixed in the upstream version of LLVM.