how the operating system compiles c programs at the time of booting.

anandg111 · 05-01-2012, 10:18 AM

unix and linux does not makes executable files for all the programs.

it compiles it and executes it whenever required.

at the time of booting the system, how kernel compiles those c programs without "gcc".

suicidaleggroll · 05-01-2012, 10:22 AM

What programs are you referring to?

anandg111 · 05-01-2012, 10:27 AM

i don't know but i came to know that kernel compiles some programs at the time of booting.so my que. is without gcc how the kernel compiles those files ?

pan64 · 05-01-2012, 10:41 AM

during the boot nothing will be compiled (as far as I know). The already compiled kernel code will be used. Maybe it is another kind of compilation, but would be much better if you can tell us the sources of your information.

chrism01 · 05-02-2012, 12:10 AM

As above, you seem to have misunderstood something you read. Linux does not compile stuff at boot time. Please give us the link where you think you read this.

schneidz · 05-02-2012, 10:56 AM

i think on some distros the initrd.img is unzipped/cpio'd into ram at boot time. maybe that is what they are referring to ?

resetreset · 05-03-2012, 12:48 AM

what's "cpio"?

pan64 · 05-03-2012, 12:58 AM

cpio is a tool, see: man cpio