LD (GNU Linker) - Keyword Options (Continued): More on Initialization, Interposition, Uniqueness, LAM, Reporting, Lazy Binding, Filters, Page Size, Multiple Definitions, and Copy Relocations

initialization will occur before the runtime initialization of any other objects brought into the process at the same time. Similarly the runtime finalization of the object will occur after the runtime finalization of any other objects. interpose Specify that the dynamic loader should modify its symbol search order so that symbols in this shared library interpose all other shared libraries not so marked. unique nounique When generating a shared library or other dynamically loadable ELF object mark it as one that should (by default) only ever be loaded once, and only in the main namespace (when using "dlmopen"). This is primarily used to mark fundamental libraries such as libc, libpthread et al which do not usually function correctly unless they are the sole instances of themselves. This behaviour can be overridden by the "dlmopen" caller and does not apply to certain loading mechanisms (such as audit libraries). lam-u48 Generate GNU_PROPERTY_X86_FEATURE_1_LAM_U48 in .note.gnu.property section to indicate compatibility with Intel LAM_U48. Supported for Linux/x86_64. lam-u57 Generate GNU_PROPERTY_X86_FEATURE_1_LAM_U57 in .note.gnu.property section to indicate compatibility with Intel LAM_U57. Supported for Linux/x86_64. lam-u48-report=none lam-u48-report=warning lam-u48-report=error Specify how to report the missing GNU_PROPERTY_X86_FEATURE_1_LAM_U48 property in input .note.gnu.property section. lam-u48-report=none, which is the default, will make the linker not report missing properties in input files. lam-u48-report=warning will make the linker issue a warning for missing properties in input files. lam-u48-report=error will make the linker issue an error for missing properties in input files. Supported for Linux/x86_64. lam-u57-report=none lam-u57-report=warning lam-u57-report=error Specify how to report the missing GNU_PROPERTY_X86_FEATURE_1_LAM_U57 property in input .note.gnu.property section. lam-u57-report=none, which is the default, will make the linker not report missing properties in input files. lam-u57-report=warning will make the linker issue a warning for missing properties in input files. lam-u57-report=error will make the linker issue an error for missing properties in input files. Supported for Linux/x86_64. lam-report=none lam-report=warning lam-report=error Specify how to report the missing GNU_PROPERTY_X86_FEATURE_1_LAM_U48 and GNU_PROPERTY_X86_FEATURE_1_LAM_U57 properties in input .note.gnu.property section. lam-report=none, which is the default, will make the linker not report missing properties in input files. lam-report=warning will make the linker issue a warning for missing properties in input files. lam-report=error will make the linker issue an error for missing properties in input files. Supported for Linux/x86_64. lazy When generating an executable or shared library, mark it to tell the dynamic linker to defer function call resolution to the point when the function is called (lazy binding), rather than at load time. Lazy binding is the default. loadfltr Specify that the object’s filters be processed immediately at runtime. max-page-size=value Set the maximum memory page size supported to value. muldefs Allow multiple definitions. nocopyreloc Disable linker generated .dynbss variables used in place of variables defined in shared libraries. May result in dynamic text relocations. nodefaultlib

This section details more linker options relating to the `-z` keyword: `initfirst` for object initialization order, `interpose` for modifying symbol search order, `unique` for single-load shared objects, `lam-u48` and `lam-u57` for Intel LAM compatibility, `lam-*-report` for reporting missing LAM properties, `lazy` for lazy binding, `loadfltr` for immediate filter processing, `max-page-size` for setting maximum page size, `muldefs` for allowing multiple definitions, and `nocopyreloc` for disabling copy relocations.