How to Capture All of My Compiler's Output to a File

linux - How do I capture all of my compiler's output to a file as well as need to display output

You could use tee:

$ ./a.out | tee log.txt

linux - How do I capture all of my compiler's output to a file as well as need to display output

You could use tee:

$ ./a.out | tee log.txt

How to redirect the output of gcc compiler to a file?

gcc prints its error messages to stderr, so you have to redirect stderr:

gcc -o foo foo.c 2> foo.gccmessages

You give arguments on the command line always in the same way

./a.out argument1 argument2 argument3

Capture all compiler invocations and command line parameters during build

There are the following ways to gather information about the parameters of compilation in Linux:

1. Override environment CC/CXX variables. It is used in the utility scan-build from Clang Analyzer. This method works reliably only with simple projects for Make.

2. procfs - all the information on the processes is stored in /proc/PID/... . Reading from a disk is a slow process, you might not be able to receive information about all processes of a build.

3. strace utility (ptrace library). The output of this utility contains a lot of useful information, but it requires a complicated parsing, because information is written randomly. If you do not use many threads to build the project, it is a fairly reliable way to gather information about the processes. It’s used in PVS-Studio.

4. JSON Compilation Database in CMake. You can get all the compilation parameters using the definition -DCMAKE_EXPORT_COMPILE_COMMANDS=On. It is a reliable method if a project does not depend on non-standard environment variables. Also the project for CMake can be written with errors and issue incorrect Json, although this doesn’t affect the project build. It’s supported in PVS-Studio.

5. Bear utility (function substitution using LD_PRELOAD). You can get JSON Database Compilation for any project. But without environment variables it’ll be impossible to run the analyzer for some projects. Also, you cannot use it with projects, which already use LD_PRELOAD for a build. It’s supported in PVS-Studio.

Collecting information about compiling in Windows for PVS-Studio:

1. Visual Studio API to get the compilation parameters of standard projects;

2. MSBuild API to get the compilation parameters of standard projects;

3. Win API to get the information on any compilation processes as, for example, Windows Task Manager does it.

Capture compilation output from script taking arguments, with stderr into log file along with looking the compilation process

You can use |& to redirect both stdout and stderr:

myscript.sh arg1 arg2 |& tee output.log

how to copy java compiler errors to a file in windows

You can redirect command output into files with >

javac helloworld.java > file.txt 2>&1

2>&1 redirects stderr (2) to stdout (1) and both get redirected to file.txt.

Note that you can also use >> instead of > to append content if you do not want to overwrite the file for every run of the command.

Redirect the output of g++ compiler to a file?

For csh type of shells, do:

g++ test.cpp >& xx

How can I capture Java compiler errors into a file?

Try redirecting the stderr:

javac t1.java 2> error_file 

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