Libraries are often created using a library manager such as llvm-ar for Linux or llvm-lib for Windows. Given a list of objects, the library manager will insert the objects into a named library to be used in subsequent link steps.
Use llvm-ar to create a library from a list of objects. For example the following command creates a library named user.a containing the a.o and b.o objects:
llvm-ar cru user.a a.o b.o
Use llvm-lib to create libraries of IPO mock object files and link them on the command line.
For example:icx /c /Qipo a.cpp b.cpp c.cpp
llvm-lib -out:main.lib b.obj c.obj
icx -fuse-ld=lld a.obj main.lib -o result.exe