-xF

Enables performance analysis of the executable using the Analyzer. (See the analyzer(1) man pages.) Produces code that can be reordered at the function level. Each function in the file is placed in a separate section; for example, functions foo() and bar() are placed in the sections .text%foo and .text%bar, respectively. Function ordering in the executable can be controlled by using -xF in conjunction with the -M option to ld (see ld(1)). This option also causes the assembler to generate some debugging information in the object file, necessary for data collection.