CODEWITHSUNDEEP
gccassemblymakefile
OliverJL
OliverJL

Reputation: 23

gcc / make - creating make files for creating assembly and linking

To perform an experiment I want to modify the assembly code of the OpenWRT Project (by inserting NOPs between the regular, meaningful code). Thous I need to create the assembly files (.s files) by compiling with gcc's -S flag in the first run, execute a shell script modifying the assembly files and call the linker in the third step to create the executable binaries. Beside step 2, is there a way to accomplish steps 1 & 3 by an appropriate make file modification/configuration, i.e. create one make file for compiling (creating .s files) and another to conduct linking?

Thanks for enlightenment & Happy a new year! :)

Upvotes: 2

Views: 1590

Answers (1)

Sajad Banooie
Sajad Banooie

Reputation: 360

use this syntax:

target [target...] : [dependent ....]
     [ command ...]

example:

 %.S: %.c
      $(CC) -S $@ -c $<
 %.o: %.S
      $(CC) -o $@ -c $<

which means to build the target foo.o make should build foo.S and for foo.S build foo.c $@ means target name $< means targets first dependency

Upvotes: 1

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