linux g++ compiler redirect stderr and stdout creates empty file

Question

I am redirecting the g++ compiler output(both stderr and stdout) to a file on linux. But it is creating an empty file.

I read in some other post that stdout is not flushed after every line. Thats ok, but what about stderr. In my case there are compilation errors running several screens. So, I am interested in stderr output. There is no stdout output created.

 g++ -c -I ~/cplusplus/boost_1_37_0/boost_1_37_0/ -I 
~/cplusplus/niVxWorksDeliver/TEES/ Algorithms.cpp 2> output

The above command creates an empty file named "output". The following command reports invalid null command.

 g++ -c -I ~/cplusplus/boost_1_37_0/boost_1_37_0/ -I    
~/cplusplus/niVxWorksDeliver/TEES/ Algorithms.cpp &> output
Invalid null command.

Answer 1

Here.

Answer 2

"No news is good news" -- does your command even produce any output? When there are no errors, g++ won't print out anything!

Answer 3

You might try this:

sh/bash/zsh version:

g++ -c -I ~/cplusplus/boost_1_37_0/boost_1_37_0/ \
       -I ~/cplusplus/niVxWorksDeliver/TEES/ \
       Algorithms.cpp > output 2>&1

csh or tcsh version:

g++ -c -I ~/cplusplus/boost_1_37_0/boost_1_37_0/ \
       -I ~/cplusplus/niVxWorksDeliver/TEES/ \
       Algorithms.cpp >& output