Linux下的彙編語言編程

The link command is the following:

ld -m elf_i386 -static /usr/lib/crt1.o /usr/lib/crti.o -lc average.o /usr/lib/crtn.o

"-m elf_i386" instructs the linker to use the ELF file format. "-static" cause static rather than dynamic linking to occur. And "-lc" links in the standard c libraries (libc.a). It might be necessary to include "-I/libdirectory" in the invocation for ld to find the c library.

The object file (average.o) can then be linked to the Linux wrapper code in order to create an executable. These files are crt1.o, crti.o and crtn.o. crt1.o and crti.o provide initialization code and crtn.o does cleanup. These should all be located in "/usr/lib" be may be elsewere on some systems. They, and their source, might be located by executing the following find command:

find / -name "crt*" -print