annotation Link

A lib can be marked with @[Link(lib : String, *, ldflags : String, framework : String, pkg_config : String)] to declare the library that should be linked when compiling the program.

At least one of the lib, ldflags, framework arguments needs to be specified.

@[Link(ldflags: "-lpcre")] will pass -lpcre straight to the linker.

@[Link("pcre")] will lookup for a shared library. 1. will lookup pcre using pkg-config, if not found 2. will pass -lpcre to the linker.

@[Link("pcre", pkg_config: "libpcre")] will lookup for a shared library. 1. will lookup libpcre using pkg-config, if not found 2. will lookup pcre using pkg-config, if not found 3. will pass -lpcre to the linker.

@[Link(framework: "Cocoa")] will pass -framework Cocoa to the linker.

When an -l option is passed to the linker, it will lookup the libraries in paths passed with the -L option. Any paths in CRYSTAL_LIBRARY_PATH are added by default. Custom paths can be passed using ldflags: @[Link(ldflags: "-Lvendor/bin")].