如何使用 execl() 编译包含 math.h 库的程序

Question

execl("/usr/bin/cc","cc","myprog.c",NULL)

I use the this line for compiler to myprog.c in myMainProg. But myprog.c have #include "math.h" . So I have to add -lm. How can I do that?

Answer 1

Command (from shell) to link your program should be:

cc myprog.c -o myprog -lm

So if you want to use execl to compile it from another program you should use:

execl("/usr/bin/cc","cc","myprog.c", "-o", "myprog", "-lm", (char *) NULL);

Edit: I almost forgot when using execl() the ending NULL argument must be cast to char *