How to page the compile messages of GCC?

Question

I am a beginner to Linux console and start write some code in C.

I try to compile code and hope to see messages using command

gcc foo.c -o foo -v | less

But the result text cannot be paged. Any wrong I do? Thanks.

Answer 1

The | pipe command just redirects stdout. To redirect stderr as well as stdout use |&:

gcc foo.c -o foo -v |& less

Answer 2

The error messages from gcc are going to stderr, and your pipe is only catching stdout.

Assuming that you're using bash, try this to capture stderr as well as stdout:

gcc foo.c -o foo -v 2>&1 | less

Answer 3

GCC's warnings are printed to stderr, not stdout. You'd have to redirect that too:

gcc foo.c -o foo -v |& less