** Description changed:
+ [ Impact ]
+
+ * User can't use clang++-18 to build C++ code with -flto option.
+
+ [ Test Plan ]
+
+ * Install clang-18 from proposed updates.
+ * Try to build a C++ program with LTO (for example following the steps in
original description.
+
+ [ Where problems could occur ]
+
+ * The missing LLVMgold.so is caused by switching to use mold in package
+ building. Using mold is introduced in llvm 18. The fix is just to revert
+ the change, and uses the same linker (gold) as old llvm versions. So the
+ change looks safe.
+
+ [ Other Info ]
+
+ * No
+
+
+ [Original Description]
+
+
Unlike all other llvm-*-linker-tools packages, this one does not install
`/usr/lib/llvm-18/lib/LLVMgold.so`. It does however install a broken symlink to
it at `/usr/lib/bfd-plugins/LLVMgold-18.so`
This results in compilation failures with clang++ when used with the `-flto`
flag for link time optimization.
To reproduce:
main.cpp:
```c++
int main() { return 0; }
```
```bash
clang++ -flto main.cpp -o main
```
Results in:
```
/usr/bin/ld: /usr/lib/llvm-18/bin/../lib/LLVMgold.so: error loading plugin:
/usr/lib/llvm-18/bin/../lib/LLVMgold.so: cannot open shared object file: No
such file or directory
clang++: error: linker command failed with exit code 1 (use -v to see
invocation)
```
Package version is
llvm-18-linker-tools/noble,now 1:18.1.3-1 amd64
llvm-18-linker-tools:
- Installed: 1:18.1.3-1
- Candidate: 1:18.1.3-1
- Version table:
- *** 1:18.1.3-1 500
- 500 http://de.archive.ubuntu.com/ubuntu noble/universe amd64 Packages
- 100 /var/lib/dpkg/status
+ Installed: 1:18.1.3-1
+ Candidate: 1:18.1.3-1
+ Version table:
+ *** 1:18.1.3-1 500
+ 500 http://de.archive.ubuntu.com/ubuntu noble/universe amd64 Packages
+ 100 /var/lib/dpkg/status
** Merge proposal linked:
https://code.launchpad.net/~zhsj/ubuntu/+source/llvm-toolchain-18/+git/llvm-toolchain-18/+merge/466494
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Bugs, which is subscribed to Ubuntu.
https://bugs.launchpad.net/bugs/2064187
Title:
llvm-18-linker-tools does not include LLVMgold.so
To manage notifications about this bug go to:
https://bugs.launchpad.net/ubuntu/+source/llvm-toolchain-18/+bug/2064187/+subscriptions
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