How do I capture all of my compiler's output to a file?

I'm building an opensource project from source (CPP) in Linux. This is the order:

$CFLAGS="-g Wall" CXXFLAGS="-g Wall" ../trunk/configure --prefix=/somepath/ --host=i386-pc --target=i386-pc
$make

While compiling I'm getting lot of compiler warnings. I want to start fixing them. My question is how to capture all the compiler output in a file?

$make > file is not doing the job. It's just saving the compiler command like g++ -someoptions /asdf/xyz.cpp I want the output of these command executions.

Solution 1:

The compiler warnings happen on stderr, not stdout, which is why you don't see them when you just redirect make somewhere else. Instead, try this if you're using Bash:

$ make &> results.txt

The & means "redirect stdout and stderr to this location". Other shells often have similar constructs.

Solution 2:

In a bourne shell:

make > my.log 2>&1

I.e. > redirects stdout, 2>&1 redirects stderr to the same place as stdout

Solution 3:

Lots of good answers so far. Here's a frill:

$ make 2>&1 | tee filetokeepitin.txt 

will let you watch the output scroll past.

Solution 4:

The output went to stderr. Use 2> to capture that.

$make 2> file

Solution 5:

Assume you want to hilight warning and error from build ouput:

make |& grep -E "warning|error"