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

Question

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  gt  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

User · Answer

Assume you want to hilight warning and error from build ouput   make   amp  grep -E  warning error

User · Answer

Try make 2 gt  file   Compiler warnings come out on the standard error stream  not the standard output stream   If my suggestion doesn t work  check your shell manual for how to divert standard error

User · Answer

Based on an earlier reply by  dmckee  make   tee makelog txt   This gives you real-time scrolling output while compiling  and simultaneously write to the makelog txt file

User · Answer

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  amp  gt  results txt   The  amp  means  redirect stdout and stderr to this location   Other shells often have similar constructs

User · Answer

In C shell - The ampersand is after the greater-than symbol  make  gt  amp  filename

User · Answer

Lots of good answers so far  Here s a frill     make 2 gt  amp 1   tee filetokeepitin txt    will let you watch the output scroll past

User · Answer

In a bourne shell      make   my log 2  amp 1   I e    redirects stdout  2  amp 1 redirects stderr to the same place as stdout

User · Answer

The output went to stderr  Use 2 gt  to capture that    make 2 gt  file

User · Answer

From http   www oreillynet com linux cmd cmd csp path g gcc     The   character does not redirect the   standard error  It s useful when you   want to save legitimate output without   mucking up a file with error messages    But what if the error messages are   what you want to save  This is quite   common during troubleshooting  The   solution is to use a greater-than sign   followed by an ampersand   This   construct works in almost every modern   UNIX shell   It redirects both the   standard output and the standard   error  For instance     gcc invinitjig c  gt  amp  error-msg    Have a look there  if this helps  another forum

User · Answer

It is typically not what you want to do  You want to run your compilation in an editor that has support for reading the output of the compiler and going to the file line char that has the problems  It works in all editors worth considering  Here is the emacs setup    https   www gnu org software emacs manual html node emacs Compilation html

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

Examples related to linux

Examples related to shell

Examples related to g++

Examples related to makefile

Examples related to io-redirection