Does the linker remove unused functions?

Does the linker remove unused functions?

-ffunction-sections puts every function in its own ELF section. The linker only sees sections as a black box. –gc-sections tells the linker to track calls into sections and remove unused ones.

How do you organize symbols in sketch?

To group Symbols together in the Components View and Insert menu, name them using the format: Group-name/Symbol-name . For example, two Symbols named Button/Normal and Button/Pressed will become part of a group named Button .

How do you remove binary symbols?

To remove debugging symbols from a binary (which must be an a. out or ELF binary), run strip –strip-debug filename. Wildcards can be used to treat multiple files (use something like strip –strip-debug $LFS/tools/bin/*).

Are unused functions compiled?

8 Answers. It depends on the compiler. Visual C++ 9 can do that – unused static functions are removed at compilation phase (there’s even a C4505 warning for that), unused functions with external linkage can be removed at link phase depending on linker settings.

How do I get rid of the debug symbol?

How do debug symbols work?

Debug symbols typically include not only the name of a function or global variable, but also the name of the source code file in which the symbol occurs, as well as the line number at which it is defined. Thus, binaries with debug symbols can become quite large, often several times the stripped file size.

What is the flag in GCC?

Recommended compiler and linker flags for GCC

What is — GC sections?

–gc-sections decides which input sections are used by examining symbols and relocations. The section containing the entry symbol and all sections containing symbols undefined on the command-line will be kept, as will sections containing symbols referenced by dynamic objects.