9.54.5.2 longcalls .................. The 'longcalls' directive enables or disables function call relaxation. Function Call Relaxation Xtensa Call Relaxation. .begin [no-]longcalls .end [no-]longcalls Call relaxation is disabled by default unless the '--longcalls' command-line option is specified. The 'longcalls' directive overrides the default determined by the command-line options.