How do we save logs while building the code?

Question

I am building code in C using make , how would I save build logs ?

Answer 1

In addition to redirection proposed by another answers, consider the script utility which writes the complete log of your interaction with a shell and its children or with another program: both input and output.

Sometimes you have to intervene during make, fix something in place when it fails, restart again. When a thing like that is done in a hurry, it's beneficial to have a protocol of what you've done without having to think of logging or recording when you do it.

Answer 2

make 2>&1 > output.log

This will help you

Answer 3

If you use standard make, I assume you do it through a terminal, so you would only have to do : make >> mylogfile.log.
For more tricks about I/O redirection, take a look here.

Answer 4

If you want to save the output of make then use:

make 1>std.out 2> err.out

The 1 means the standardoutput and 2 the erroroutput

Answer 5

Shell output redirection will help you here.

make 2>&1 > output.log

See: make output redirection

Answer 6

If you both want to save the log and see it on the console, you could use the tee command:

make 2>&1 | tee build.log

The 2>&1 part is telling the shell to redirect stderr to stdout.

Answer 7

Typically the most interesting output (compiler warnings and errors) goes to stderr. In bash:

$ make 2> out

Then inspect the file nameed out. The 2> is a Bash output redirection operator.