关于ld -r

mingjwan

-r
       --relocateable
           Generate  relocatable  output---i.e.,  generate an output file that
           can in turn serve as input to ld.  This  is  often  called  partial
           linking.   As  a side effect, in environments that support standard
           Unix magic numbers, this option also sets the output  file's  magic
           number  to  "OMAGIC".  If this option is not specified, an absolute
           file is produced.  When linking C++ programs, this option will  not
           resolve references to constructors; to do that, use -Ur.

上面是对-r的解释,可是看了还是不懂,有谁能给个例子吗?什么是relocatable?

win_hate

cc -c 1.c   ==>; 1.o
cc -c 2.c  ==>; 2.o

ld -r 1.o 2.o -o 3.o   ==>;  3.o


其中  3.o  = 1.o + 2.o

mingjwan

就等同于gcc  1.o 2.o -o 3.o吧?