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@bhaskarvk
bhaskarvk / Setup GCC and CLANG Toolchains.md
Last active July 4, 2024 09:47
Proper GCC (vers. 5/6/7) & LLVM/CLANG (vers. 4/5) Toolchain Setup on Ubuntu/Linux Mint

This approach uses update-alternatives to manage GCC and LLVM/CLANG C/C++ compiler toolchains. Although tested on Linux Mint 18.3, this approach should work on any Debian based distro or for that matter any Linux distro with update-alternatives support, provided the packages are installed correctly.

There are 3 files

  • gcc-alternatives.sh installs GCC versions 5/6/7 and sets up alternatives for gcc/g++/cpp/gfortran.
  • llvm-clang-alternatives.sh installs LLVM and CLANG versions 4/5 and sets up alternatives for various LLVM and CLANG programs including clang and clang++.
  • cc-alternatives.sh sets up alternatives for the cc, cxx, and the ld commands. This script can be used to change systemwide default compiler/linker combination to either GCC or CLANG.

Once these scripts are run you can change the system GCC/CLANG versions by running sudo update-alternatives --config gcc|clang. To change the default compiler/linker combo used by t

@jc00ke
jc00ke / llvm-update-alternatives
Created November 4, 2014 02:19
LLVM & clang alternatives
#!/usr/bin/env sh
sudo update-alternatives --install \
/usr/bin/llvm-config llvm-config /usr/bin/llvm-config-3.4 200 \
--slave /usr/bin/llvm-ar llvm-ar /usr/bin/llvm-ar-3.4 \
--slave /usr/bin/llvm-as llvm-as /usr/bin/llvm-as-3.4 \
--slave /usr/bin/llvm-bcanalyzer llvm-bcanalyzer /usr/bin/llvm-bcanalyzer-3.4 \
--slave /usr/bin/llvm-cov llvm-cov /usr/bin/llvm-cov-3.4 \
--slave /usr/bin/llvm-diff llvm-diff /usr/bin/llvm-diff-3.4 \
--slave /usr/bin/llvm-dis llvm-dis /usr/bin/llvm-dis-3.4 \
@felipecsl
felipecsl / restart coreaudio daemon
Last active October 10, 2025 23:26
Restart Mac OS X coreaudio daemon. Useful if you cannot change the audio output device to Airplay.
sudo kill `ps -ax | grep 'coreaudiod' | grep 'sbin' |awk '{print $1}'`
# or...
sudo killall coreaudiod
@bgreenlee
bgreenlee / logging_subprocess.py
Created November 29, 2011 00:58
Variant of subprocess.call that accepts a logger instead of stdout/stderr #python
import subprocess
import select
from logging import DEBUG, ERROR
def call(popenargs, logger, stdout_log_level=DEBUG, stderr_log_level=ERROR, **kwargs):
"""
Variant of subprocess.call that accepts a logger instead of stdout/stderr,
and logs stdout messages via logger.debug and stderr messages via
logger.error.
@twerth
twerth / colors
Created July 22, 2011 15:47
List colors in shell
#!/bin/bash
echo -e "\033[0mCOLOR_NC (No color)"
echo -e "\033[1;37mCOLOR_WHITE\t\033[0;30mCOLOR_BLACK"
echo -e "\033[0;34mCOLOR_BLUE\t\033[1;34mCOLOR_LIGHT_BLUE"
echo -e "\033[0;32mCOLOR_GREEN\t\033[1;32mCOLOR_LIGHT_GREEN"
echo -e "\033[0;36mCOLOR_CYAN\t\033[1;36mCOLOR_LIGHT_CYAN"
echo -e "\033[0;31mCOLOR_RED\t\033[1;31mCOLOR_LIGHT_RED"
echo -e "\033[0;35mCOLOR_PURPLE\t\033[1;35mCOLOR_LIGHT_PURPLE"
echo -e "\033[0;33mCOLOR_YELLOW\t\033[1;33mCOLOR_LIGHT_YELLOW"