I'm not able to see source code in lldb, despite trying to the advice of LLDB not showing source code
I've boiled this down to a simple C++17 program that is compiled with the following command. I'm running on OSX with clang 7.0.1 that I've compiled myself from source, but my lldb is the XCode-installed one (this may be a problem?).
Here's my compile command:
clang++ -std=c++17 -march=native -Wall -g -O0 main.cpp -o main
Note that main/main.dSYM/Contents/Resources/DWARF is created when I compile and that seems fine.
One clear issue, though, is that debug info is not in the binary and the object file can't be found at all:
$ dsymutil main
warning: (x86_64) /var/folders/c1/vxvr6h9x10b8dbsxhh6nx05h0000gn/T/main-43ca25.o unable to open object file: No such file or directory
warning: no debug symbols in executable (-arch x86_64)
I was under the impression that I can just compile with debug info (via -g) and have everything "just work" but that's clearly not the case.
How can I get debug symbols to work so I can use lldb?
I was able to solve this problem by removing the -flto linker flag that I didn't realize I had on. Apparently, when LTO is enabled, debugging symbols do not work.