llvm-ld - LLVM linker

llvm-ld <options> <files>

The llvm-ld command is similar to the common Unix utility, CWld. It links together bytecode modules to produce an executable program.

-o filename

This overrides the default output file and specifies the name of the file that should be generated by the linker. By default, llvm-ld generates a file named a.out for compatibility with ld. The output will be written to filename.

-lname

This option specifies the name of a library to search when resolving symbols for the program. Only the base name should be specified as name, without a lib prefix or any suffix.

-LPath

This option tells llvm-ld to look in Path to find any library subsequently specified with the -l option. The paths will be searched in the order in which they are specified on the command line. If the library is still not found, a small set of system specific directories will also be searched. Note that libraries specified with the -l option that occur before any -L options will not search the paths given by the -L options following it.

-link-as-library

Link the bytecode files together as a library, not an executable. In this mode, undefined symbols will be permitted.

-r

An alias for -link-as-library. Specifies the kind of machine for which code or assembly should be generated.

-native

Generate a native binary instead of a shell script that runs the JIT from bytecode.

-native-cbe

Generate a native binary with the C back end and compilation with GCC.

-disable-compression

Do not compress bytecode files.

-O0

An alias for the -O1 option.

-O1

Optimize for linking speed, not execution speed. The optimizer will attempt to reduce the size of the linked program to reduce I/O but will not otherwise perform any link-time optimizations.

-O2

Perform only the minimal or required set of scalar optimizations.

-03

An alias for the -O2 option.

-04

Perform the standard link time inter-procedural optimizations. This will attempt to optimize the program taking the entire program into consideration.

-O5

Perform aggressive link time optimizations. This is the same as -O4 but works more aggressively to optimize the program.

-disable-inlining

Do not run the inlining pass. Functions will not be inlined into other functions.

-disable-opt

Completely disable optimization. The various -On options will be ignored and no link time optimization passes will be run.

-disable-internalize

Do not mark all symbols as internal.

-verify

Run the verification pass after each of the passes to verify intermediate results.

-s

Strip symbol info from the executable to make it smaller.

-export-dynamic

An alias for -disable-internalize

-load module

Load an optimization module, module, which is expected to be a dynamic library that provides the function name CWRunOptimizations. This function will be passed the PassManager, and the optimization level (values 0-5 based on the -On option). This function may add passes to the PassManager that should be run. This feature allows the optimization passes of llvm-ld to be extended.

-v

Specifies verbose mode. In this mode the linker will print additional information about the actions it takes, programs it executes, etc.

If llvm-ld succeeds, it will exit with 0 return code. If an error occurs, it will exit with a non-zero return code.

The CWLLVM_LIB_SEARCH_PATH environment variable is used to find bytecode libraries. Any paths specified in this variable will be searched after the CW-L options.

llvm-ar

Maintained by the LLVM Team (<http://llvm.cs.uiuc.edu>).