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Old 10-04-2007, 10:41 AM   #1
olin
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Registered: Sep 2007
Distribution: Debian Lenny
Posts: 26

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How to print 'make' error message to a file


I tried to compile beaver-0.3.0 but got many error messages while using 'make' command. I tried to diagnose the problem but I cannot scroll up the screen further enougth (even using rxvt) to see the first error. I tried to use make >> filename, or make -d >> filename. The former one only printed a few make info, and the latter one printed debug info other than error info. Could someone give me an idea? Thank you!
 
Old 10-04-2007, 10:51 AM   #2
matthewg42
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Registered: Oct 2003
Location: UK
Distribution: Kubuntu 12.10 (using awesome wm though)
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Programs which run the terminal have two output file handles - standard output and standard error, which have identifier numbers 1 and 2 respectively. "Normal" output customarily goes to standard output, and error messages and warnings typically go to standard error.

When you re-direct output using > or >>, this re-directs only standard output (the former truncating the target file first, the latter appending to the file).

In Borne style shells (including bash, which is a very common interactive shell on Linux systems), you can re-direct standard error using 2> and 2>>. For your purposes, you probably want to re-direct them both to the same file. You can do this by saying "2>&1", which means "take output on standard error and send it wherever standard output goes". This is how:
Code:
make > make_output 2>&1
 
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