Shell Programming and Scripting

OS   := $(shell uname -s)
ARCH := $(shell uname -m)
KERN := $(shell uname -r | cut -d. -f 1,2)
BDIR := $(OS)_$(KERN).$(ARCH)

# create build directory if it doesn't exist
archdir: ${BDIR}
${BDIR}:
    @mkdir -p ${BDIR}

$ ls
Makefile
$ cat Makefile
OS   := $(shell uname -s)
ARCH := $(shell uname -m)
KERN := $(shell uname -r | cut -d. -f 1,2)
BDIR := $(OS)_$(KERN).$(ARCH)
 
archdir: ${BDIR}
${BDIR}:
        @mkdir -p ${BDIR}
$ make --version
GNU Make 3.81
Copyright (C) 2006  Free Software Foundation, Inc.
This is free software; see the source for copying conditions.
There is NO warranty; not even for MERCHANTABILITY or FITNESS FOR A
PARTICULAR PURPOSE.
This program built for i686-pc-cygwin
$ make
$ ls
CYGWIN_NT-5.1_1.7.i686  Makefile

#!/bin/sh
# Detects which OS and if it is Linux then it will detect which Linux Distribution.
OS=`uname -s`
REV=`uname -r| cut -d. -f 1,2`
MACH=`uname -m`
 
if [ "${OS}" = "SunOS" ] ; then
        OS=Solaris
        ARCH=`uname -p`
        OSSTR="${OS} ${REV}(${ARCH} `uname -v`)"
elif [ "${OS}" = "AIX" ] ; then
        OSSTR="${OS} `oslevel` (`oslevel -r`)"
elif [ "${OS}" = "Linux" ] ; then
        KERNEL=`uname -r`
        if [ -f /etc/redhat-release ] ; then
                DIST='RedHat'
                PSUEDONAME=`cat /etc/redhat-release | sed s/.*\(// | sed s/\)//`
                REV=`cat /etc/redhat-release | sed s/.*release\ // | sed s/\ .*//`
        elif [ -f /etc/SUSE-release ] ; then
                DIST=`cat /etc/SUSE-release | tr "\n" ' '| sed s/VERSION.*//`
                REV=`cat /etc/SUSE-release | tr "\n" ' ' | sed s/.*=\ //`
        elif [ -f /etc/mandrake-release ] ; then
                DIST='Mandrake'
                PSUEDONAME=`cat /etc/mandrake-release | sed s/.*\(// | sed s/\)//`
                REV=`cat /etc/mandrake-release | sed s/.*release\ // | sed s/\ .*//`
        elif [ -f /etc/debian_version ] ; then
                DIST="Debian `cat /etc/debian_version`"
                REV=""
        fi
        if [ -f /etc/UnitedLinux-release ] ; then
                DIST="${DIST}[`cat /etc/UnitedLinux-release | tr "\n" ' ' | sed s/VERSION.*//`]"
        fi
        OSSTR="${OS} ${DIST} ${REV}(${PSUEDONAME} ${KERNEL} ${MACH})"
else
    OSSTR="${OS} ${REV} ${ARCH}"
fi
 
echo ${OSSTR} | tr ' ' '_'