diff --git a/bldpkg b/bldpkg
old mode 100644
new mode 100755
index be29b21..cbe6c9c
--- a/bldpkg
+++ b/bldpkg
@@ -21,11 +21,6 @@
 # OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
 ############
 
-# TODO
-# -> Write code to log build output to a log file inside a particular directory
-# -> Email the user about the outcome of the build?
-# -> Increment warnings as they are issued during the build and show final warning total in the build summary
-
 set -e
 
 err() {
@@ -88,7 +83,7 @@ Usage:
              be compatible with standard SMLinux package build file format
 
   -g         Generate SHA512 checksums of all tarballs and patches in the current 
-             directory and insert them into the package build file
+             directory, insert them into the package build file and exit
 
   -h         Show this help message
 
@@ -102,13 +97,15 @@ Usage:
 
   -r         Resume the build by skipping all commands in prepbuilddir and execute 
              build() function. Presumes that the package was completely extracted
-	     in the build directory, and patches, if any, were applied and executes 
-	     stuff inside build().
+	         in the build directory, and patches, if any, were applied and executes 
+	         stuff inside build().
 
   -s         Display build summary. A summary is produced whenever a build is either
              interrupted, exits cleanly or aborts due to a build error
 
-  -v         Increase compiler verbosity
+  -t         Build inside tmpfs directory
+
+  -v         Enable verbose compile
 
   -x         Invoke bash shell command trace mode. This one isn't akin to running
              bash -x <script> but close enough, because the mode is inserted half-way
@@ -117,20 +114,6 @@ EOF
 exit 0
 }
 
-# Then source the configuration file holding all values
-if [[ -f $HOME/.bldpkg.conf ]] ; then
-  source "$HOME/.bldpkg.conf"
-elif [[ -f /etc/bldpkg.conf ]] ; then
-  source /etc/bldpkg.conf 
-else 
-  err "Bldpkg configuration file '/etc/bldpkg.conf' not found!"
-fi
-
-# Error out if globalccache and globalsccache are set in the /etc/bldpkg.conf
-if [[ $globalccache = 1 ]] && [[ $globalsccache = 1 ]] ; then
-  err "Please only enable either ccache or sccache in bldpkg.conf at the same time, not both."
-fi
-
 # Function to validate the build file.
 validatebldfile() {
   local buildfile
@@ -165,6 +148,7 @@ validatebldfile() {
     err "'build()' function does not exist in your build file."
   fi
 
+  # Validate the download variable separately because it's optional
   if grep -q '^download=' "$buildfile" ; then
     if ! grep -q '^download=[*p*://]*' "$buildfile" ; then
       err "Invalid URL in the 'download' variable in the build file."
@@ -172,39 +156,6 @@ validatebldfile() {
   fi
 }
 
-# Store the source directory path the build was initiated from 
-srcdir="$PWD"
-
-# Presume that the build file name will match the name of the parent directory
-# unless otherwise overridden using -f <buildfile>
-buildfile="${srcdir##*/}.SMBuild"
-
-# Run a for loop to find compile and build-related files
-for requiredfile in "${rqfiles[@]}"; do
-  if [[ ! -x $(type -p "$requiredfile") ]] ; then
-    err "Could not find required program '$requiredfile'!"
-  fi
-done
-
-# While loop for providing handy arguments to users. Some will override bldpkg.conf.
-while getopts ':def:ghj:o:rsvx' option; do
-  case "$option" in
-    d) debug=1 ;; # Produce a debug build with -g3
-    e) extractprompt=0; 
-       autoextract=1 ;; # Automatically extract the final pkg installer inside user's PWD
-    f) setbuildfile="$OPTARG" ;;
-    g) genchecksum=1 ;;
-    h) help ;;
-    j) customcputhreads="$OPTARG" ;;
-    o) origbuildfile="$OPTARG" ;;
-    r) resumepkgbuild=1 ;;
-    s) showsummary=1 ;; # Show build summary at the end of the build irrespective of the build status
-    v) getoptscompilerverbosity=1 ;;
-    x) set -xv ;; # Invoke bash's -x option for command tracing
-    *) help ;;
-  esac
-done
-
 # Function to error out the build in absence of a build file
 nopackagebuildfileerror() {
   err "No package build file to source from!
@@ -212,139 +163,13 @@ Was expecting '$buildfile' to be present inside this directory '$PWD'.
 Try -f <build_file> if your build file has a different name (Not recommended)"
 }
 
-# The getopts builtin sets the OPTIND environment variable whose value is set to 1 if no argument
-# is given. For every argument passed, the number is incremented by 1. In our case, if OPTIND equals
-# 1, no argument was passed. We therefore expect a package build file to be present which will be then sourced.
-if [[ $OPTIND = 1 ]] ; then
-  if [[ ! -f $buildfile ]] ; then
-    nopackagebuildfileerror
-  elif ! validatebldfile "$buildfile" ; then
-    err "'$buildfile' build file validation failed!"
-  else
-    source "$buildfile"
+validatemakeflags() {
+  local makeflags="$1"
+  if ! echo "$makeflags" | grep -E -q '^[0-9]+$' ; then
+    err "Invalid MAKEFLAGS '$makeflags'!"
   fi
-
-# If OPTIND is greater than 1, perform various checks and actions
-elif [[ $OPTIND -gt 1 ]] ; then
-
-  # Override cputhreads sourced from bldpkg.conf if customcputhreads is set. Need to append '-j' so that it gets
-  # passed on to MAKEFLAGS
-  if [[ -n $customcputhreads ]] ; then
-    # And validate whether the value is a number
-    if ! echo "$customcputhreads" | grep -E -q '^[0-9]+$' ; then
-      err "Invalid CPU job number '$customcputhreads'. Please provide a valid number."
-    fi
+}
     
-    # Reset $customcputhreads as $cputhreads
-    cputhreads="-j$customcputhreads"
-  fi
-
-  # If $origbuildfile is set and is a file, check if $setbuildfile and $origbuildfile are the same
-  if [[ -n $origbuildfile ]] ; then
-    if [[ ! -f $origbuildfile ]] ; then
-      err "Original build file '$origbuildfile' does not exist!"
-
-    elif [[ -n $setbuildfile ]] && [[ -f $setbuildfile ]] ; then
-      if [[ $origbuildfile = $setbuildfile ]] ; then
-        err "Original build file and alternate build file are the same!"
-      fi
-
-    elif ! validatebldfile "$origbuildfile" ; then
-      err "Alternative build file validation failed!"
-    fi
-  fi
-    
-  # If $setbuildfile is set and is a file, set buildfile to its value, source it and initialise the build
-  if [[ -n $setbuildfile ]] && [[ -f $setbuildfile ]] ; then
-    buildfile="$setbuildfile"
-    if ! validatebldfile "$buildfile" ; then
-      err "'$buildfile' validation failed!"
-    else
-      source "$buildfile"
-    fi
-
-  # If $setbuildfile is set but a file passed as an argument is not found, give an error
-  elif [[ -n $setbuildfile ]] && [[ ! -f $setbuildfile ]] ; then
-    err "Build file '$setbuildfile' not found!"
-
-  # If the above two conditions don't meet, get the presumed $buildfile value as a file and source it
-  elif [[ -f $buildfile ]] ; then
-    if ! validatebldfile "$buildfile" ; then
-      err "'$buildfile' validation failed!"
-    else
-      source "$buildfile"
-    fi
-
-  # If even that file is not found, throw an error and exit
-  else
-    nopackagebuildfileerror
-  fi
-fi
-
-# Unset OPTIND and OPTARG to avoid problems if getopts is used again in the future
-unset OPTIND OPTARG
-
-# Generate and insert sha512sums into the build file
-if [[ $genchecksum = 1 ]] ; then
-
-  # File types whose checksums will go into the new build file
-  info "Discarding any old sha512sums from '$buildfile'"
-  sed -E -i \
-    -e '/^sha512sums=".*"$/d' \
-    -e '/^sha512sums="/,/"$/d' \
-    -e "/^sha512sums='.*'\$/d" \
-    "$buildfile"
-
-  info "Adding new sha512sums in '$buildfile'"
-  printf 'sha512sums="\n' >> "$buildfile"
-
-  files=( *.tar.* *.zip *.t?z *.patch *.diff *.c *.h )
-
-  # For loop that searches for files matching the above extension and prints them to the bottom of the build file
-  for file in "${files[@]}" ; do
-    if [[ -f $file ]] ; then
-      sha512sum "$file" >> "$buildfile"
-    fi
-  done
-
-  printf '"' >> "$buildfile"
-
-  if [[ $(find . -type d -maxdepth 1 -print0 | wc -l) -ge 1 ]]; then
-    warn "SHA512 checksums not generated for files inside directories!"
-  fi
-
-  info "You may now run 'bldpkg' again"
-  exit 0
-fi
-
-# Display the package and its version we are building or resuming
-if [[ -z $resumepkgbuild ]] ; then
-  info "Building package '$app' version '$version' ..."
-sleep 0.5
-else
-  info "Resuming build of package '$app' version '$version' ..."
-fi
-
-# Check integrity of files defined in sha512sums variable which is expected 
-# in nearly every single package build file
-if [[ -z $sha512sums ]] ; then 
-  err "SHA512 checksums don't exist in '$buildfile'! Please run 'bldpkg -g' to add them"
-fi
-  
-eval sums=\"\$sha512sums\"
-
-info "Verifying SHA512 checksums against source files..."
-  
-IFS=$'\n'
-
-for src in $sums; do
-  if ! echo $src | sha512sum -c ; then
-    err "Checksums failed to match!"
-  fi
-done
-
-unset IFS
-
 # Function for applying patches to the build in a more efficient manner
 applypatch() {
   # Take patch file name as the first argument
@@ -366,27 +191,6 @@ applypatch() {
   fi
 }
 
-# Do a preliminary package dependency check if $checkdependencies is set to 1 in bldpkg.conf
-if [[ $checkdependencies = 1 ]] ; then
-  
-  info "Parsing $app 's dependency list..."
-  for packagedep in $requires; do
-    depcount=$(find /share/doc -type f -name "$packagedep.SMBuild" | wc -l)
-    # If count is 1, we are ok
-    if [[ $depcount = 1 ]] ; then
-      info "Found dependency '$packagedep'"
-    # If count is 0, we exit, because we are in trouble
-    elif [[ $depcount = 0 ]] ; then
-      err "Did not find dependency '$packagedep'"
-    # If count is greater than or equal to 2, we are in slightly less trouble
-    elif [[ $depcount -ge 2 ]] ; then
-      warn "Found multiple versions of '$packagedep' !"
-      sleep 0.5
-    fi
-  done
-
-fi
-
 # Function to specifically match arrays inside a value. This function will be used later on to perform
 # package and directory matches using certain conditions. Note: "${ARRAY[@]}" =~ "${VARIABLE}" isn't fool-proof.
 inarray() {
@@ -398,231 +202,18 @@ inarray() {
   return 1
 }
 
-# Check if $parenttmp is set and is a directory
-if [[ -z $parenttmp ]] ; then
-  err "parenttmp variable not set in bldpkg.conf."
-elif [[ ! -d $parenttmp ]] ; then
-  err "parenttmp variable set to '$parenttmp' in bldpkg.conf is not a directory."
-fi
+# Function to prevent a package from compiling on an unsupported architecture
+compileonlyfor() {
+  # usage: compileonlyfor <arch> 
+  # will cause compilation to exit with 0 if uname -m does not match <arch>
+  archname="$(uname -m)"
+  archargument="$1"
 
-# Attempt to write to the $parenttmp directory. This directory is used for everything related to the
-# build process outside the source directory $srcdir
-if ! touch "$parenttmp/.smlinuxwritetest" ; then
-  err "Parent temp directory '$parenttmp' is not writable!"
-else
-  # Discard the test file
-  rm "$parenttmp/.smlinuxwritetest"
-fi
-
-# If htmloutput is set to 1, echo $app, $version and $build as file names inside the parent build directory. 
-# This will output into an HTML file so that the basic status of the build process (whether started, stopped, 
-# interrupted or failed) can be viewed in the web browser. 
-if [[ $htmloutput = 1 ]] ; then
-
-  if [[ -n $autobuild ]] ; then
-    cat << EOF >> "$parenttmp/BUILDMONITOR"
-<b>$commencedate | Building package $currentpkgnumber / $totalpkgnumber: <i><a href="/smlinux/pkgresults?pkg=$app&amp;smver=1.0&amp;arch=all&amp;resultnum=25">$app $version</a></i></b>
-EOF
-  else 
-    cat << EOF >> "$parenttmp/BUILDMONITOR"
-<b>$commencedate | Building package <i><a href="/smlinux/pkgresults?pkg=$app&amp;smver=1.0&amp;arch=all&amp;resultnum=25">$app $version</a></i></b>
-EOF
+  if [[ $archname != $archargument ]]; then
+    info "'$app' not supported on '$archname' and hence not not being built. Exiting."
+    exit 0
   fi
-
-  touch "$parenttmp/BUILDING"
-fi
-  
-# Validate compressor and set extension
-validpkgextensions=( tgz tbz tlz txz )
-if ! inarray "${pkgext}" "${validpkgextensions[@]}" ; then
-  err "'$pkgext' is not a valid pkg extension for an SMLinux installer file"
-fi
-
-# Figure out the compression tool to be used based on the $pkgext variable set in bldpkg.conf. 
-case "$pkgext" in 
-  tgz) if [[ -x /bin/pigz ]] ; then
-         compressor=pigz
-       else
-         compressor=gzip 
-       fi
-       compressopts="$gzipopts" ;;
-
-  tbz) compressor=bzip2 
-       compressopts="$bzipopts" ;;
-
-  tlz) if [[ -x /bin/plzip ]] ; then
-         compressor=plzip
-       else 
-         compressor=lzip
-       fi
-       compressopts="$lzipopts" ;;
-
-  txz) compressor=xz 
-       compressopts="$xzopts" ;;
-esac
-
-# Borrowed from slackware's installpkg utility
-if ! "$compressor" --help > /dev/null 2>&1  ; then
-  err "'$compressor' Compressor validation failed."
-fi
-
-# Validate the TMPFS directory if usetmpfs is set to 1 and tmpfsdir variable is set. If it fails,
-# declare a variable for the build summary.
-if [[ $usetmpfs = 1 ]] && [[ -n $tmpfsdir ]]; then
-  if [[ ! -d $tmpfsdir ]] ||  ! touch "$tmpfsdir/.smlinuxtmpwritetest"  \
-    || [[ $(findmnt -no TARGET $tmpfsdir) != $tmpfsdir ]] \
-    || [[ $(findmnt -no FSTYPE $tmpfsdir) != tmpfs ]]; then
-      tmpfscheckfailed=1
-  fi
-
-  # Discard the file used to test the tmp directory
-  [[ -e "$tmpfsdir/.smlinuxtmpwritetest" ]] && rm "$tmpfsdir/.smlinuxtmpwritetest"
-
-  # Check the tmpfsdir for stale directories from previous builds. If found, issue a warning.
-  if [[ $(find "$tmpfsdir" -type d -maxdepth 1 -name "*.src" -o -name "package-*" | wc -l) -gt 0 ]]; then
-    if [[ ! -d $tmpfsdir/package-$app ]] || [[ ! -d $tmpfsdir/$app.src ]] ; then
-      warn "TMPFS directory '$tmpfsdir' has stale directories from previous builds!"
-    fi
-  fi
-fi
-  
-# Validate system swap if swapcheck is defined and set to 1
-if [[ $swapcheck = 1 ]]; then
-  if inarray "${app}" "${packagesrequiringswap[@]}" ; then    
-
-    # Here we determine available system swap size needed to compile exceptional packages that pull
-    # in a lot of RAM. Those packages are listed under the packagesrequiringswap array in bldpkg.conf. 
-    # Check whether swap is available on the system and if it is, determine its size. If its size
-    # is >= swapsize, we are all good. If it's less than swapsize, we exit with a status 1.
-
-    swapcheck=$(grep "SwapFree" /proc/meminfo | awk '{print $2}')
-    if [[ $swapcheck -lt $swapsize ]]; then
-      err "Insufficient swap to build '$app' which is listed in '$packagesrequiringswap'. 
-Kindly add/increase swap size on this system and try again."
-    fi
-  fi
-fi
-
-# Set the build and package staging directories. This is where package 
-# files that get "installed" go into, for example 'make install DESTDIR=$pkg' 
-# or 'DESTDIR="$pkg" ninja install'.
-
-# If usetmpfs is set to 1, tmpfsdir is defined and tmpfscheckfailed  variable is unset, determine 
-# if the $app is in the exception list and whether to build inside or outside the TMPFS directory.
-if [[ $usetmpfs = 1 ]] && [[ -n $tmpfsdir ]] && [[ -z $tmpfscheckfailed ]] ; then
-   
-  # If $app is in the TMPFS exception list inside bldpkg.conf, compile it *OUTSIDE* the TMPFS
-  # directory, i.e the non-TMPFS directory, else compile it *INSIDE* the TMPFS directory. This if/else
-  # is solely for deciding whether $app is in the exception list or not. 
-  if inarray "${app}" "${tmpfsexceptionlist[@]}" ; then
-
-    # We DO NOT compile inside tmpfsdir
-    tmpfsenabledforthispackage=0
-
-    # In the absence of tmpfs, we use the normal directory 
-    tmp="$nontmpfsdir/$app.src"
-    pkg="$nontmpfsdir/package-$app"
-  else
-    # We compile inside tmpfsdir. Set the tmpfsenabledforthispackage variable here to inform build
-    # summary function at the bottom
-    tmpfsenabledforthispackage=1
-
-    # Disable ccache
-    ccache=0
-
-    # Override preservebuilddir and preservepackagedir to remove both build and package staging directories
-    preservebuilddir=0
-    preservepackagedir=0
-
-    # Get the directory from the tmpfsdir variable for extracting the source and set it as our build
-    # and staging directory
-    tmp="$tmpfsdir/$app.src"
-    pkg="$tmpfsdir/package-$app"
-
-  fi
-else
-  # If usetmpfs is disabled, we compile in the non-TMPFS directory
-  tmp="$nontmpfsdir/$app.src"
-  pkg="$nontmpfsdir/package-$app"
-fi
-
-if inarray "${pkg}" "${protecteddirectories[@]}" ; then
-  echo "############ ATTENTION ############"
-  err "'pkg' VARIABLE IS SET TO '$pkg' WHICH IS A PROTECTED DIRECTORY! EXITING!"
-fi
-
-# Also check tmp directory in advance
-if inarray "${tmp}" "${protecteddirectories[@]}" ; then
-  echo "############ ATTENTION ############"
-  err "'tmp' VARIABLE IS SET TO '$tmp' WHICH IS A PROTECTED DIRECTORY! EXITING!"
-fi
-
-# Validate and export $cputhreads as MAKEFLAGS variable 
-if [[ -n $cputhreads ]]; then
-  # export the user-defined number
-  MAKEFLAGS="$cputhreads"
-  export MAKEFLAGS
-else
-  # Or fetch the number from nproc
-  MAKEFLAGS=$(nproc --all)
-  export MAKEFLAGS
-fi
-  
-# Apply CPU-specific compiler variables defined inside bldpkg.conf
-# https://github.com/sakaki-/gentoo-on-rpi-64bit/blob/master/reference/compile_run_benchmarks.sh
-# https://www.raspberrypi.org/forums/viewtopic.php?t=11629
-# noarch is set inside initfs, pkgtools, GTK themes and some other stuff.
-
-# If $arch has not been exported by autobuild or not set in the individual build files that have
-# arch=noarch, we set our own. $HOSTTYPE is only set in the bash shell.
-[[ -z $arch ]] && arch="$HOSTTYPE"
-
-# Validate declared compiler variables
-if [[ -z $CC ]] || [[ -z $CXX ]] ; then
-  err "CC / CXX variables not set in bldpkg.conf!"
-else
-  export CC CXX
-fi
-
-if [[ $arch = noarch ]]; then
-  CFLAGS=""
-  export CFLAGS
-
-elif [[ $arch = aarch64 ]]; then  
-  hostdist="$aarch64hostdist"
-  builddist="$aarch64builddist"
-
-  if [[ -n $debug ]]; then
-    CFLAGS="$gccdebug $aarch64cflags"
-  else
-    CFLAGS="$aarch64cflags"
-  fi
-
-  CXXFLAGS="$CFLAGS"
-  export hostdist builddist CFLAGS CXXFLAGS
-
-elif [[ $arch = x86_64 ]]; then
-  builddist="$x8664builddist"
-
-  if [[ -n $debug ]]; then
-    CFLAGS="$gccdebug $x8664cflags"
-  else
-    CFLAGS="$x8664cflags"
-  fi
-
-  CXXFLAGS="$CFLAGS"
-  export builddist CFLAGS CXXFLAGS
-
-else
-  err "Sorry! '$arch' CPU architecture not supported by SMLinux!"
-fi
-
-# Inside a function, validate the compilers that have been set as CC and CXX in bldpkg.conf
-# A small C/CXX program is being used to print a random number
-
-# Generate a random number using shuf. We'll output this same number inside the C/CXX program.
-# If the numbers match, the compiler looks sane, else error out.
-randomnum="$(shuf -i 100-9999 -n1)"
+}
 
 # Function to validate compilers.
 # Usage: compilertestfile "$CC" "$CFLAGS" cc-test.c cc-test
@@ -633,7 +224,7 @@ compilertestfile() {
   compilerfile="$3"
   compileroutput="$4"
 
-  printf "[INFO] Validating '$compiler'... "
+  printf "[INFO] Validating compiler '$compiler'... "
 
   cat << EOF > "$parenttmp/$compilerfile"
 #include <stdio.h>
@@ -652,138 +243,23 @@ EOF
   fi
 }
 
-# Quotes are important while passing C/CXXFLAGS
-compilertestfile "$CC" "$CFLAGS" cc-test.c cc-test
-compilertestfile "$CXX" "$CXXFLAGS" cxx-test.cpp cxx-test
-
-# Function to validate symlinks. 
-# Usage: checkcompilersymlink symlink symlink_target
-checkcompilersymlink() {
-  symlinkdir="$1"
-  symlinktgt="$2"
-
-  for compiler in gcc g++ cc c++ ; do 
-    if [[ -e $symlinkdir/$compiler ]] && [[ -L $symlinkdir/$compiler ]]; then
-      # We use "realpath" to follow the $ccachesympath/$f symlink and act on the exit code
-      if [[ $(realpath -e $symlinkdir/$compiler) != $symlinktgt ]] ; then
-        err "'$symlinkdir/$compiler' does not point to '$symlinktgt'. Kindly fix this!"
+# Function to start/stop sccache. 
+# Usage: sccache start/stop
+sccacheprocess() {
+  sccacheopt="$1"
+  if [[ $sccache = 1 ]]; then
+    if [[ $sccacheopt = "start" ]] ; then
+      # Check whether sccache is running on TCP port 4226 via nc
+      if ! nc -z -w 1 localhost 4226 > /dev/null 2>&1 ; then
+        info "Starting sccache"
+        $sccachebinpath --start-server
+      fi
+    elif [[ $sccacheopt = "stop" ]] ; then
+      if nc -z -w 1 localhost 4226 > /dev/null 2>&1 ; then
+        info "Stopping sccache"
+        $sccachebinpath --stop-server
       fi
-    else
-      err "Symlink '$compiler' either does not exist or is not a symlink inside '$symlinkdir'! Kindly fix this!"
     fi
-  done
-}
-
-# Validate everything related to ccache if globalccache is set
-if [[ $globalccache = 1 ]]; then
-  if [[ ! -x $ccachebinpath ]] ; then
-    err "Ccache binary was not found globalccache is enabled in bldpkg.conf!"
-  fi
-
-  checkcompilersymlink $ccachesymdirpath $ccachebinpath
-  
-  # Prepare $PATH and export it only if ccache is unset in the pkg build file
-  if [[ -z $ccache ]] ; then
-    PATH="$ccachesymdirpath:$PATH"
-    export PATH
-  fi
-fi
-
-# Validate everything related to sccache if globalccache is set
-if [[ $globalsccache = 1 ]]; then
-   
-  if [[ ! -x $sccachebinpath ]] ; then
-    err "Oops! sccache binary was not found but building with it was requested! 
-Either ensure sccache is in your '$PATH' or disable this option in bldpkg.conf."
-  fi
-
-  # We expect the rustc wrapper to be defined in $HOME/.cargo/config.toml
-  if ! grep -q 'rustc-wrapper\ \= "\/bin\/sccache"' $HOME/.cargo/config.toml ; then
-    err 'sccache is not defined as a rustc wrapper!
-Please add the following to your '"$HOME/"'.cargo/config.toml:
-[build]
-rustc-wrapper = "/bin/sccache"'
-  fi
-
-  # Useful for rust-specific builds. 
-  RUSTC_WRAPPER="$sccachebinpath"
-  export RUSTC_WRAPPER
-
-  # Check whether sccache is running on TCP port 4226 via nc
-  if ! nc -z -w 1 localhost 4226 > /dev/null 2>&1 ; then
-    /bin/sccache --start-server
-  fi
-fi
-
-# Validate everything related to distcc if globaldistcc is set
-if [[ $globaldistcc = 1 ]] ; then
-  # Check if distcc exists and is an executable
-  if [[ ! -x $distccbinpath ]]; then
-    err "Distcc binary was not found but globaldistcc is enabled in bldpkg.conf"
-  fi
-
-  checkcompilersymlink $distccsymdirpath $distccbinpath
-
-  # Prepare $PATH and export DISTCC_HOSTS and DISTCC_IO_TIMEOUT only if distcc is unset in the pkg build file
-  if [[ -z $distcc ]] ; then
-    # netcat hosts inside $DISTCC_HOSTS by checking for an open port
-    info "Validating distcc hosts..."
-    # Check if we have nc
-    if [[ ! -x /bin/nc ]] ; then
-      warn "nc does not exist! Ignoring this..."
-    else 
-      # Remove the common options along with the slash and the numbers after it
-      hosts=$(echo "$DISTCC_HOSTS" | sed -e 's@/[a-z0-9,]*@@g' -e 's@--randomize@@' -e 's@localhost@@')
-      for host in ${hosts[@]} ; do
-        # We only run distccd on TCP port 3632
-        if ! /bin/nc -z -w 1 "$host" 3632 > /dev/null 2>&1 ; then
-          warn "Distcc host '$host' is OFFLINE! Rewriting DISTCC_HOSTS"
-          DISTCC_HOSTS=$(echo "$DISTCC_HOSTS" | sed "s@$host/[a-z0-9,]*@@")
-        fi
-      done
-    fi
-    
-    PATH="$distccsymdirpath:$PATH"
-    export DISTCC_HOSTS DISTCC_IO_TIMEOUT PATH
-  fi
-fi
-
-# If compilerverbosity is set in bldpkg.conf or if verbosity is set to 1 from getopts, set V and
-# VERBOSE environment variables for make and cmake build systems to pick up.
-if [[ $compilerverbosity = 1 ]] || [[ $getoptscompilerverbosity = 1 ]] ; then
-  V=1 
-  VERBOSE=1
-  export V VERBOSE
-fi
-
-# If $noautoconfsite is unset in an individual package build file, export CONFIG_SITE variable into the build 
-# environment for a package's configure script to pickup. Most autoconf-compatible configure scripts will 
-# automatically pick up this variable from the environment and speed up the initial configure process. 
-if [[ -z $noautoconfsite ]] ; then
-  if [[ -n $configsite ]] && [[ -e $configsite ]]; then
-    CONFIG_SITE="$configsite"
-    export CONFIG_SITE
-  fi
-fi
-
-# Condition to reuse the autobuildtemp file if set from autobuild or make a new temporary file
-if [[ -n $autobuildtemp ]]; then
-  tempfile="$autobuildtemp"
-else
-  tempfile=$(mktemp "$parenttmp/SMBUILD.XXXXXX")
-fi
-
-# Function to prevent a package from compiling on an unsupported architecture
-compileonlyfor() {
-  # usage: compileonlyfor <arch> 
-  # will cause compilation to exit with 0 if uname -m does not match <arch>
-  archname="$(uname -m)"
-  archargument="$1"
-
-  if [[ $archname != $archargument ]]; then
-    echo ""
-    echo "[INFO]'$app' not supported on '$archname' and hence not not being built. Exiting."
-    exit 0
   fi
 }
 
@@ -854,18 +330,18 @@ preprunitservice() {
   cd "$pkg"
 
   # Create the service directories
-  mkdir -p "etc/service/$1" var/service 
+  mkdir -p "etc/service/$rsname" var/service 
 
   # Copy the service run file from the source directory into etc/service/$1
-  if [[ -f $srcdir/$1.run ]] ; then
-    cp "$srcdir/$1.run" "etc/service/$1/run"
+  if [[ -f $srcdir/$rsname.run ]] ; then
+    cp "$srcdir/$rsname.run" "etc/service/$rsname/run"
   else
-    err "Runit service file '$1.run' does not exist!"
+    err "Runit service file '$rsname.run' does not exist!"
   fi
 
   # If the second argument is "down", or if the second argument is "finish", create that file inside etc/service/$1/
   if [[ $2 = down ]]; then
-    touch "etc/service/$1/down"
+    touch "etc/service/$rsname/down"
   elif [[ $2 = finish ]]; then
     cp "$srcdir/$1.$2" "etc/service/$1/finish"
   fi
@@ -880,6 +356,104 @@ preprunitservice() {
   chmod 0755 "$pkg/etc/service/$1/run"
 }
 
+# Function to validate symlinks. 
+# Usage: checkcompilersymlink symlink symlink_target
+checkcompilersymlink() {
+  symlinkdir="$1"
+  symlinktgt="$2"
+
+  for compiler in gcc g++ cc c++ ; do 
+    if [[ -e $symlinkdir/$compiler ]] && [[ -L $symlinkdir/$compiler ]]; then
+      # We use "realpath" to follow the $ccachesympath/$f symlink and act on the exit code
+      if [[ $(realpath -e $symlinkdir/$compiler) != $symlinktgt ]] ; then
+        err "'$symlinkdir/$compiler' does not point to '$symlinktgt'. Kindly fix this!"
+      fi
+    else
+      err "Symlink '$compiler' either does not exist or is not a symlink inside '$symlinkdir'! Kindly fix this!"
+    fi
+  done
+}
+
+# Prepare a nice HTML file that can be used to view status of the build process from a web browser
+prephtmloutput() {
+  if [[ $htmloutput = 1 ]] ; then
+    if [[ $pkgstatus = 0 ]] ; then
+      cat << EOF >> "$parenttmp/BUILDMONITOR.html"
+<tr><td><b><i><a href="/smlinux/pkgresults?pkg=$app&amp;smver=1.0&amp;arch=all&amp;resultnum=25">$app $version</a></i></b></td><td>$commencedate</td><td>$finishdate</td><td>$totaltime</td><td><b style="color:#00cc00;">SUCCEEDED</b></td></tr>
+EOF
+    elif [[ $wasinterrupted = 1 ]]; then
+      cat << EOF >> "$parenttmp/BUILDMONITOR.html"
+<tr><td><b><i><a href="/smlinux/pkgresults?pkg=$app&amp;smver=1.0&amp;arch=all&amp;resultnum=25">$app $version</a></i></b></td><td>$commencedate</td><td>$finishdate</td><td>$totaltime</td><td><b>INTERRUPTED</b></td></tr>
+EOF
+    else 
+      cat << EOF >> "$parenttmp/BUILDMONITOR.html" 
+<tr><td><b><i><a href="/smlinux/pkgresults?pkg=$app&amp;smver=1.0&amp;arch=all&amp;resultnum=25">$app $version</a></i></b></td><td>$commencedate</td><td>$finishdate</td><td>$totaltime</td><td><b style="color:#ff1a1a;">FAILED</b></td></tr>
+EOF
+    fi
+  fi
+}
+
+extractinfo() {
+  info "Extracting package installer inside $srcdir/test..."
+  mkdir -p "$srcdir/test"
+  tar xvf "$newpkglocation" -C "$srcdir/test"
+  info "'$app' package installer file successfully extracted"
+}
+
+promptuser() {
+  # Extract package at the end of a build if autoextract is set to 1
+  if [[ $autoextract = 1 ]] && [[ -z $autobuild ]] && [[ -n $newpkglocation ]] ; then
+    extractinfo
+  fi
+
+  # Prompt the user at the end of a build whether to extract contents of a newly-built installer
+  # into a subdirectory called "test" inside the package source directory the build was manually initiated from.
+  # Has no effect on autobuilds since they are simply installed right away.
+  if [[ $extractprompt = 1 ]] && [[ -z $autobuild ]] && [[ -n $newpkglocation ]] ; then
+    read -r -p "[NOTIFY] Would you like the package installer of '$app-$version' to be extracted in your current directory '$srcdir' for examination? (y/N) " yn
+      case "$yn" in
+        Y|y) info "Wise Choice :-)" 
+             extractinfo ;;
+          *) info "Nope? Alright " ;;
+      esac
+  fi
+
+  # Prompt the user at the end of a successful build whether to install the newly created package. 
+  # Has no effect on autobuilds because packages there are installed automatically.
+  if [[ $installprompt = 1 ]] && [[ -z $autobuild ]] && [[ -n $newpkglocation ]] ; then
+      read -r -p "[NOTIFY] Would you like the package installer of '$app-$version' to be installed/upgraded onto your system? (y/N) " yn
+      case "$yn" in 
+        Y|y) info "Wise choice :-) " ;
+             upgradepkg --install-new "$newpkglocation" ;;
+          *) info "Nope? Alright." ;;
+      esac
+  fi
+
+  if [[ $pkgstatus = 0 ]]; then
+    exit 0
+  fi
+}  
+
+# This function will set the interrupt variable so prepbuildoutput can output the right build status 
+# on receiving ctrl-c from the user during a manual build.
+interruptoutput() {
+  echo
+  info "Caught Keyboard Interrupt"
+  wasinterrupted="1"
+
+  # Restore terminal colours
+  echo -e $colourd
+
+  # Terminate sccache
+  sccacheprocess stop
+
+  # If installprompt and extractprompt are set and the prompt is invoked after a successful build, hitting
+  # ctrl-C will only set the above sm variable repeatedly and won't return user to the shell because
+  # of the interrupt (SIGINT) trap set way below. Putting exit 0 is a decent way to get out of that prompt
+
+  exit 0
+}
+
 # Function to perform post-compile tasks.
 # To be invoked inside a package build file.
 mkfinalpkg() {
@@ -1015,19 +589,14 @@ EOF
 
   tar cvf - . --format gnu \
     --xform 'sx^\./\(.\)x\1x' \
-    --show-stored-names | "$compressor" "$compressopts" > "$newpkglocation"
+    --show-stored-names | "$compressor" "$compressoropts" > "$newpkglocation"
   pkgstatus=$?
 
   echo
   info "SMLinux package '$app-$version-$arch-$build.$pkgext' successfully generated in $pkgdest."
 
   # Terminate sccache
-  if [[ $globalsccache = 1  ]] ; then
-    if nc -z -w 1 localhost 4226 > /dev/null 2>&1 ; then
-      info "Terminating sccache"
-      $sccachebinpath --stop-server
-    fi
-  fi
+  sccacheprocess stop
 
   info "Leaving staging directory $pkg"
 
@@ -1053,7 +622,7 @@ EOF
     builddirsize=$(du -s "$tmp" | awk '{print $1}')
 
     # Calculate SSD write savings if TMPFS has been used
-    if [[ $usetmpfs = 1 ]] && [[ $tmpfsenabledforthispackage = 1 ]] ; then
+    if [[ $tmpfs = 1 ]] && [[ $tmpfsenabledforthispackage = 1 ]] ; then
 
       # Determine size of staging directory
       pkgdirsize=$(du -s "$pkg" | awk '{print $1}')
@@ -1138,38 +707,32 @@ prepbuildoutput() {
     fi
 
 
-    # Determine if distcc was used. If globaldistcc is enabled and  set to 1 and distcc is not declared in the
-    # package build file, then set dstats in the build summary 
-    if [[ $globaldistcc = 1 ]] && [[ -z $distcc ]]; then
+    # Determine if distcc was used. If $distcc set to 1, set distccstats in the build summary 
+    if [[ $distcc = 1 ]] ; then
       # If distcc was used, cut out --randomize and output rest of the DISTCC_HOSTS variable
       distccvar=$(echo "$DISTCC_HOSTS" | sed 's@--randomize@@')
-      dstats="Yes,$distccvar"
-    # Else if globaldistcc is enabled and set to 1 and distcc is set to 0 in the package build file, then set
-    # dstats in the build summary
-    elif [[ $globaldistcc = 1 ]] &&  [[ $distcc = 0 ]]; then
-      dstats="Nope, disabled but global variable set"
-    # Else If globaldistcc is unset, set dstats in the build summary
-    elif [[ -z $globaldistcc ]] || [[ $globaldistcc = 0 ]]; then
-      dstats="No, disabled globally"
+      distccstats="Yes, $distccvar"
+    # Else If distcc is unset, set distccstats in the build summary
+    elif [[ -z $distcc ]] || [[ $distcc = 0 ]]; then
+      distccstats="No, disabled"
     fi
 
 
-    # Determine if ccache was used. Ccache caches compiler objects to disk, which speeds up subsequent compiles.
-    # However, if we are compiling  inside tmpfs, we are not using ccache at all. So we set cstats accordingly
-    # in the build summary
-    if [[ $globalccache = 1 ]] && [[ $usetmpfs = 1 ]] && [[ $tmpfsenabledforthispackage = 1 ]] ; then
-      cstats="Enabled globally but disabled due to tmpfs"
+    # Determine if ccache was used. If we are compiling inside tmpfs, we are not using ccache at all, so set 
+    # ccachestats accordingly in the build summary
+    if [[ $ccache = 1 ]] && [[ $tmpfs = 1 ]] && [[ $tmpfsenabledforthispackage = 1 ]] ; then
+      ccachestats="Set to 1 but disabled due to tmpfs"
 
-    elif [[ $globalccache = 1 ]] && [[ $usetmpfs = 0 ]] && [[ -z $ccache ]] ; then
+    elif [[ $ccache = 1 ]] && [[ $tmpfs = 0 ]] ; then
       ccacheusedsize=$(ccache -s | grep "cache size" | head -n 1 | awk '{ $1=$2="" ; print $0}' | sed 's@ @@g')
       ccachetotalsize=$(ccache -s | grep "max cache size" | awk '{ $1=$2=$3="" ; print $0}' | sed 's@ @@g')
-      cstats="Yes, $ccacheusedsize / $ccachetotalsize Allocated"
+      ccachestats="Yes, $ccacheusedsize / $ccachetotalsize Allocated"
 
-    elif [[ $globalccache = 1 ]] && [[ -z $usetmpfs ]] ; then
-      cstats="Yes"
+    elif [[ $ccache = 1 ]] && [[ -z $tmpfs ]] ; then
+      ccachestats="Yes"
 
-    elif [[ -z $globalccache ]] || [[ $globalccache = 0 ]] ; then
-      cstats="No, disabled globally"
+    elif [[ -z $ccache ]] || [[ $ccache = 0 ]] ; then
+      ccachestats="No, disabled in bldpkg.conf"
     fi
 
 
@@ -1182,26 +745,20 @@ prepbuildoutput() {
 
 
     # Determine whether tmpfs was used
-    if [[ $usetmpfs = 1 ]] && [[ $tmpfsenabledforthispackage = 1 ]] ; then
+    if [[ $tmpfs = 1 ]] && [[ $tmpfsenabledforthispackage = 1 ]] ; then
       tmpfsstate="Yes"
 
-    elif [[ $usetmpfs = 1 ]] && [[ $tmpfsenabledforthispackage = 0 ]]; then
-      tmpfsstate="*Not for this package* but enabled globally"
+    elif [[ $tmpfs = 1 ]] && [[ $tmpfsenabledforthispackage = 0 ]]; then
+      tmpfsstate="*Not for this package* but enabled in bldpkg.conf"
 
-    elif [[ $usetmpfs = 1 ]] && [[ $tmpfscheckfailed = 1 ]]; then
-      tmpfsstate="*NOPE, TMPFS DIRECTORY CHECK FAILED* but enabled globally"
+    elif [[ $tmpfs = 1 ]] && [[ $tmpfscheckfailed = 1 ]]; then
+      tmpfsstate="*NOPE, TMPFS DIRECTORY CHECK FAILED* but enabled in bldpkg.conf"
 
     else
-      tmpfsstate="No, disabled globally"
+      tmpfsstate="No, disabled in bldpkg.conf"
     fi
 
 
-    if [[ -n $cputhreads ]]; then
-      makeflags="$MAKEFLAGS, manually set"
-    else
-      makeflags="$MAKEFLAGS, auto-detected"
-    fi
-    
     # Determine if the build was successful or not
     if [[ $pkgstatus = 0 ]] ; then
       # Determine the compressed size
@@ -1254,12 +811,12 @@ $colourc Build Section: $colourd $bsection
 $colourc Total Time:   $colourd  $ttime
 $colourc Started:  $colourd      $commencedate
 $colourc Stopped:  $colourd      $finishdate
-$colourc Ccache Used?   $colourd $cstats
-$colourc Distcc Used?  $colourd  $dstats
+$colourc Ccache Used?   $colourd $ccachestats
+$colourc Distcc Used?  $colourd  $distccstats
 $colourc TMPFS Used?  $colourd   $tmpfsstate $tmpfssavingsize
-$colourc CPU Threads:  $colourd  ${makeflags/-j/}
+$colourc MAKEFLAGS:  $colourd    $MAKEFLAGS
 $colourc CFLAGS Used:  $colourd  $CFLAGS
-$colourc Compressor:  $colourd   $compressor ($compressopts)
+$colourc Compressor:  $colourd   $compressor ($compressoropts)
 $colourc Build Type:  $colourd   $buildsys & $bldtype
 $colourc ------------------------------------------------------------------------------- $colourd
 EOF
@@ -1281,88 +838,488 @@ EOF
 
 }
 
-# Prepare a nice HTML file that can be used to view status of the build process from a web browser
-prephtmloutput() {
-  if [[ $htmloutput = 1 ]] ; then
-    if [[ $pkgstatus = 0 ]] ; then
-      cat << EOF >> "$parenttmp/BUILDMONITOR.html"
-<tr><td><b><i><a href="/smlinux/pkgresults?pkg=$app&amp;smver=1.0&amp;arch=all&amp;resultnum=25">$app $version</a></i></b></td><td>$commencedate</td><td>$finishdate</td><td>$totaltime</td><td><b style="color:#00cc00;">SUCCEEDED</b></td></tr>
-EOF
-    elif [[ $wasinterrupted = 1 ]]; then
-      cat << EOF >> "$parenttmp/BUILDMONITOR.html"
-<tr><td><b><i><a href="/smlinux/pkgresults?pkg=$app&amp;smver=1.0&amp;arch=all&amp;resultnum=25">$app $version</a></i></b></td><td>$commencedate</td><td>$finishdate</td><td>$totaltime</td><td><b>INTERRUPTED</b></td></tr>
-EOF
-    else 
-      cat << EOF >> "$parenttmp/BUILDMONITOR.html" 
-<tr><td><b><i><a href="/smlinux/pkgresults?pkg=$app&amp;smver=1.0&amp;arch=all&amp;resultnum=25">$app $version</a></i></b></td><td>$commencedate</td><td>$finishdate</td><td>$totaltime</td><td><b style="color:#ff1a1a;">FAILED</b></td></tr>
-EOF
+# Then source the configuration file holding all values
+if [[ -f $HOME/.bldpkg.conf ]] ; then
+  source "$HOME/.bldpkg.conf"
+elif [[ -f /etc/bldpkg.conf ]] ; then
+  source /etc/bldpkg.conf 
+else 
+  err "Bldpkg configuration file '/etc/bldpkg.conf' not found!"
+fi
+
+# Error out if ccache and sccache are set in the /etc/bldpkg.conf
+if [[ $ccache = 1 ]] && [[ $sccache = 1 ]] ; then
+  err "Please only enable either ccache or sccache in bldpkg.conf at the same time, not both."
+fi
+
+# Store the source directory path the build was initiated from 
+srcdir="$PWD"
+
+# Presume that the build file name will match the name of the parent directory
+# unless otherwise overridden using -f <buildfile>
+buildfile="${srcdir##*/}.SMBuild"
+
+# Run a for loop to find compile and build-related files
+for requiredfile in "${rqfiles[@]}"; do
+  if [[ ! -x $(type -p "$requiredfile") ]] ; then
+    err "Could not find required program '$requiredfile'!"
+  fi
+done
+
+# While loop for providing handy arguments to users. Some will override bldpkg.conf.
+while getopts ':def:ghj:o:rstvx' option; do
+  case "$option" in
+    d) debug=1 ;; # Produce a debug build with -g3
+    e) extractprompt=0; 
+       autoextract=1 ;; # Automatically extract the final pkg installer inside user's PWD
+    f) setbuildfile="$OPTARG" ;;
+    g) genchecksum=1 ;;
+    h) help ;;
+    j) custommakeflags="$OPTARG" ;;
+    o) origbuildfile="$OPTARG" ;;
+    r) resumepkgbuild=1 ;;
+    s) showsummary=1 ;; # Show build summary at the end of the build irrespective of the build status
+    t) tmpfs=1 ;;
+    v) getoptsverbosebuild=1 ;;
+    x) set -xv ;; # Invoke bash's -x option for command tracing
+    *) help ;;
+  esac
+done
+
+# The getopts builtin sets the OPTIND environment variable whose value is set to 1 if no argument
+# is given. For every argument passed, the number is incremented by 1. In our case, if OPTIND equals
+# 1, no argument was passed. We therefore expect a package build file to be present which will be then sourced.
+if [[ $OPTIND = 1 ]] ; then
+  if [[ ! -f $buildfile ]] ; then
+    nopackagebuildfileerror
+  elif ! validatebldfile "$buildfile" ; then
+    err "'$buildfile' build file validation failed!"
+  else
+    source "$buildfile"
+  fi
+
+# If OPTIND is greater than 1, perform various checks and actions
+elif [[ $OPTIND -gt 1 ]] ; then
+    
+  # If MAKEFLAGS and custommakeflags is set, let custommakeflags take precedence
+  if [[ -n $custommakeflags ]] ; then
+    validatemakeflags $custommakeflags 
+    MAKEFLAGS="-j$custommakeflags"
+
+  elif [[ -n $MAKEFLAGS ]] ; then
+    validatemakeflags $MAKEFLAGS
+
+  elif [[ -z $MAKEFLAGS ]] ; then
+    # Or fetch the number from nproc
+    MAKEFLAGS="-j$(nproc --all)"
+  fi
+  export MAKEFLAGS
+  
+
+  # If $origbuildfile is set and is a file, check if $setbuildfile and $origbuildfile are the same
+  if [[ -n $origbuildfile ]] ; then
+    if [[ ! -f $origbuildfile ]] ; then
+      err "Original build file '$origbuildfile' does not exist!"
+
+    elif [[ -n $setbuildfile ]] && [[ -f $setbuildfile ]] ; then
+      if [[ $origbuildfile = $setbuildfile ]] ; then
+        err "Original build file and alternate build file are the same!"
+      fi
+
+    elif ! validatebldfile "$origbuildfile" ; then
+      err "Alternative build file validation failed!"
     fi
   fi
-}
-
-promptuser() {
-  # Extract package at the end of a build if autoextract is set to 1
-  if [[ $autoextract = 1 ]] && [[ -z $autobuild ]] && [[ -n $newpkglocation ]] ; then
-    info "Extracting package installer inside $srcdir/test..."
-    mkdir -p "$srcdir/test"
-    tar xvf "$newpkglocation" -C "$srcdir/test"
-    info "'$app' package installer file successfully extracted"
-  fi
-
-  # Prompt the user at the end of a build whether to extract contents of a newly-built installer
-  # into a subdirectory called "test" inside the package source directory the build was manually initiated from.
-  # Has no effect on autobuilds since they are simply installed right away.
-  if [[ $extractprompt = 1 ]] && [[ -z $autobuild ]] && [[ -n $newpkglocation ]] ; then
-    read -r -p "[NOTIFY] Would you like the package installer of '$app-$version' to be extracted in your current directory '$srcdir' for examination? (y/N) " yn
-      case "$yn" in
-        Y|y) info "Wise Choice :-)" ;
-             mkdir -p "$srcdir/test" 
-             tar xvf "$newpkglocation" -C "$srcdir/test" ;
-             info "'"$app"' package installer file successfully extracted" ;;
-          *) info "Nope? Alright " ;;
-      esac
-  fi
-
-  # Prompt the user at the end of a successful build whether to install the newly created package. 
-  # Has no effect on autobuilds because packages there are installed automatically.
-  if [[ $installprompt = 1 ]] && [[ -z $autobuild ]] && [[ -n $newpkglocation ]] ; then
-      read -r -p "[NOTIFY] Would you like the package installer of '$app-$version' to be installed/upgraded onto your system? (y/N) " yn
-      case "$yn" in 
-        Y|y) info "Wise choice :-) " ;
-             upgradepkg --install-new "$newpkglocation" ;;
-          *) info "Nope? Alright." ;;
-      esac
-  fi
-
-  if [[ $pkgstatus = 0 ]]; then
-    exit 0
-  fi
-}  
-
-# This function will set the interrupt variable so prepbuildoutput can output the right build status 
-# on receiving ctrl-c from the user during a manual build.
-interruptoutput() {
-  echo
-  info "Caught Keyboard Interrupt"
-  wasinterrupted="1"
-
-  # Restore terminal colours
-  echo -e "$colourd"
-
-  # Terminate sccache
-  if [[ $globalsccache = 1 ]] ; then
-    if nc -z -w 1 localhost 4226 > /dev/null 2>&1 ; then
-      info "Terminating sccache"
-      $sccachebinpath --stop-server
+    
+  # If $setbuildfile is set and is a file, set buildfile to its value, source it and initialise the build
+  if [[ -n $setbuildfile ]] && [[ -f $setbuildfile ]] ; then
+    buildfile="$setbuildfile"
+    if ! validatebldfile "$buildfile" ; then
+      err "'$buildfile' validation failed!"
+    else
+      source "$buildfile"
     fi
+
+  # If $setbuildfile is set but a file passed as an argument is not found, give an error
+  elif [[ -n $setbuildfile ]] && [[ ! -f $setbuildfile ]] ; then
+    err "Build file '$setbuildfile' not found!"
+
+  # If the above two conditions don't meet, get the presumed $buildfile value as a file and source it
+  elif [[ -f $buildfile ]] ; then
+    if ! validatebldfile "$buildfile" ; then
+      err "'$buildfile' validation failed!"
+    else
+      source "$buildfile"
+    fi
+
+  # If even that file is not found, throw an error and exit
+  else
+    nopackagebuildfileerror
+  fi
+fi
+
+# Unset OPTIND and OPTARG to avoid problems if getopts is used again in the future
+unset OPTIND OPTARG
+
+# Generate and insert sha512sums into the build file
+if [[ $genchecksum = 1 ]] ; then
+
+  # File types whose checksums will go into the new build file
+  info "Discarding any old sha512sums from '$buildfile'"
+  sed -E -i \
+    -e '/^sha512sums=".*"$/d' \
+    -e '/^sha512sums="/,/"$/d' \
+    -e "/^sha512sums='.*'\$/d" \
+    "$buildfile"
+
+  info "Adding new sha512sums in '$buildfile'"
+  printf 'sha512sums="\n' >> "$buildfile"
+
+  files=( *.tar.* *.zip *.t?z *.patch *.diff *.c *.h )
+
+  # For loop that searches for files matching the above extension and prints them to the bottom of the build file
+  for file in "${files[@]}" ; do
+    if [[ -f $file ]] ; then
+      sha512sum "$file" >> "$buildfile"
+    fi
+  done
+
+  printf '"' >> "$buildfile"
+
+  if [[ $(find . -type d -maxdepth 1 -print0 | wc -l) -ge 1 ]]; then
+    warn "SHA512 checksums not generated for files inside directories!"
   fi
 
-  # If installprompt and extractprompt are set and the prompt is invoked after a successful build, hitting
-  # ctrl-C will only set the above sm variable repeatedly and won't return user to the shell because
-  # of the interrupt (SIGINT) trap set way below. Putting exit 0 is a decent way to get out of that prompt
-
+  info "You may now run 'bldpkg' again"
   exit 0
-}
+fi
+
+# Display the package and its version we are building or resuming
+if [[ -z $resumepkgbuild ]] ; then
+  info "Building package '$app' version '$version' ..."
+  sleep 0.5
+else
+  info "Resuming build of package '$app' version '$version' ..."
+fi
+
+# Check integrity of files defined in sha512sums variable which is expected 
+# in nearly every single package build file
+if [[ -z $sha512sums ]] ; then 
+  err "SHA512 checksums don't exist in '$buildfile'! Please run 'bldpkg -g' to add them"
+fi
+  
+eval sums=\"\$sha512sums\"
+
+info "Verifying SHA512 checksums against source files..."
+  
+IFS=$'\n'
+
+for src in $sums; do
+  if ! echo $src | sha512sum -c ; then
+    err "Checksums failed to match!"
+  fi
+done
+
+unset IFS
+
+# Do a preliminary package dependency check if $checkdependencies is set to 1 in bldpkg.conf
+if [[ $checkdependencies = 1 ]] ; then
+  
+  info "Parsing $app 's dependency list..."
+  for packagedep in $requires; do
+    depcount=$(find /share/doc -type f -name "$packagedep.SMBuild" | wc -l)
+    # If count is 1, we are ok
+    if [[ $depcount = 1 ]] ; then
+      info "Found dependency '$packagedep'"
+    # If count is 0, we exit, because we are in trouble
+    elif [[ $depcount = 0 ]] ; then
+      err "Did not find dependency '$packagedep'"
+    # If count is greater than or equal to 2, we are in slightly less trouble
+    elif [[ $depcount -ge 2 ]] ; then
+      warn "Found multiple versions of '$packagedep' !"
+      sleep 0.5
+    fi
+  done
+
+fi
+
+# Check if $parenttmp is set and is a directory
+if [[ -z $parenttmp ]] ; then
+  err "parenttmp variable not set in bldpkg.conf."
+elif [[ ! -d $parenttmp ]] ; then
+  err "parenttmp variable set to '$parenttmp' in bldpkg.conf is not a directory."
+fi
+
+# Attempt to write to the $parenttmp directory. This directory is used for everything related to the
+# build process outside the source directory $srcdir
+if ! touch "$parenttmp/.smlinuxwritetest" ; then
+  err "Parent temp directory '$parenttmp' is not writable!"
+else
+  # Discard the test file
+  rm "$parenttmp/.smlinuxwritetest"
+fi
+
+# If htmloutput is set to 1, echo $app, $version and $build as file names inside the parent build directory. 
+# This will output into an HTML file so that the basic status of the build process (whether started, stopped, 
+# interrupted or failed) can be viewed in the web browser. 
+if [[ $htmloutput = 1 ]] ; then
+
+  if [[ -n $autobuild ]] ; then
+    cat << EOF >> "$parenttmp/BUILDMONITOR"
+<b>$commencedate | Building package $currentpkgnumber / $totalpkgnumber: <i><a href="/smlinux/pkgresults?pkg=$app&amp;smver=1.0&amp;arch=all&amp;resultnum=25">$app $version</a></i></b>
+EOF
+  else 
+    cat << EOF >> "$parenttmp/BUILDMONITOR"
+<b>$commencedate | Building package <i><a href="/smlinux/pkgresults?pkg=$app&amp;smver=1.0&amp;arch=all&amp;resultnum=25">$app $version</a></i></b>
+EOF
+  fi
+
+  touch "$parenttmp/BUILDING"
+fi
+  
+printf "Validating '$compressor' and its options..."
+mkdir -p "$parenttmp/.tar.testdir"
+touch "$parenttmp/.tar.testdir/.tar.testfile"
+
+if ! tar -cf - -C "$parenttmp/.tar.testdir" . | "$compressor" "$compressoropts" > "$parenttmp/.tar.testdir.$pkgext" ; then
+  err "Failed to validate '$compressor' options! Please check your bldpkg.conf"
+fi
+
+printf " done\n"
+rm -r "$parenttmp/.tar.testdir"*
+
+# Validate the TMPFS directory if usetmpfs is set to 1 and tmpfsdir variable is set. If it fails,
+# declare a variable for the build summary.
+if [[ $tmpfs = 1 ]] && [[ -n $tmpfsdir ]]; then
+  if [[ ! -d $tmpfsdir ]] ||  ! touch "$tmpfsdir/.smlinuxtmpwritetest"  \
+    || [[ $(findmnt -no TARGET $tmpfsdir) != $tmpfsdir ]] \
+    || [[ $(findmnt -no FSTYPE $tmpfsdir) != tmpfs ]]; then
+      tmpfscheckfailed=1
+  fi
+
+  # Discard the file used to test the tmp directory
+  [[ -e "$tmpfsdir/.smlinuxtmpwritetest" ]] && rm "$tmpfsdir/.smlinuxtmpwritetest"
+
+  # Check the tmpfsdir for stale directories from previous builds. If found, issue a warning.
+  if [[ $(find "$tmpfsdir" -type d -maxdepth 1 -name "*.src" -o -name "package-*" | wc -l) -gt 0 ]]; then
+    if [[ ! -d $tmpfsdir/package-$app ]] || [[ ! -d $tmpfsdir/$app.src ]] ; then
+      warn "TMPFS directory '$tmpfsdir' has stale directories from previous builds!"
+    fi
+  fi
+fi
+  
+# Validate system swap if swapcheck is defined and set to 1
+if [[ $swapcheck = 1 ]]; then
+  if inarray "${app}" "${packagesrequiringswap[@]}" ; then    
+
+    # Here we determine available system swap size needed to compile exceptional packages that pull
+    # in a lot of RAM. Those packages are listed under the packagesrequiringswap array in bldpkg.conf. 
+    # Check whether swap is available on the system and if it is, determine its size. If its size
+    # is >= swapsize, we are all good. If it's less than swapsize, we exit with a status 1.
+
+    swapcheck=$(grep "SwapFree" /proc/meminfo | awk '{print $2}')
+    if [[ $swapcheck -lt $swapsize ]]; then
+      err "Insufficient swap to build '$app' which is listed in '$packagesrequiringswap'. 
+Kindly add/increase swap size on this system and try again."
+    fi
+  fi
+fi
+
+# Set the build and package staging directories. This is where package 
+# files that get "installed" go into, for example 'make install DESTDIR=$pkg' 
+# or 'DESTDIR="$pkg" ninja install'.
+
+# If tmpfs is set to 1 and tmpfscheckfailed  variable is unset, determine 
+# if the $app is in the exception list and whether to build inside or outside the TMPFS directory.
+if [[ $tmpfs = 1 ]] && [[ -z $tmpfscheckfailed ]] ; then
+   
+  # If $app is in the TMPFS exception list inside bldpkg.conf, compile it *OUTSIDE* the TMPFS
+  # directory, i.e the non-TMPFS directory, else compile it *INSIDE* the TMPFS directory. This if/else
+  # is solely for deciding whether $app is in the exception list or not. 
+  if inarray "${app}" "${tmpfsexceptionlist[@]}" ; then
+
+    # We DO NOT compile inside tmpfsdir
+    tmpfsenabledforthispackage=0
+
+    # In the absence of tmpfs, we use the normal directory 
+    tmp="$nontmpfsdir/$app.src"
+    pkg="$nontmpfsdir/package-$app"
+  else
+    # We compile inside tmpfsdir. Set the tmpfsenabledforthispackage variable here to inform build
+    # summary function at the bottom
+    tmpfsenabledforthispackage=1
+
+    # Disable ccache
+    ccache=0
+
+    # Override preservebuilddir and preservepackagedir to remove both build and package staging directories
+    preservebuilddir=0
+    preservepackagedir=0
+
+    # Get the directory from the tmpfsdir variable for extracting the source and set it as our build
+    # and staging directory
+    tmp="$tmpfsdir/$app.src"
+    pkg="$tmpfsdir/package-$app"
+
+  fi
+else
+  # If tmpfs is disabled, we compile in the non-TMPFS directory
+  tmp="$nontmpfsdir/$app.src"
+  pkg="$nontmpfsdir/package-$app"
+fi
+
+if inarray "${pkg}" "${protecteddirectories[@]}" ; then
+  echo "############ ATTENTION ############"
+  err "'pkg' VARIABLE IS SET TO '$pkg' WHICH IS A PROTECTED DIRECTORY! EXITING!"
+fi
+
+# Also check tmp directory in advance
+if inarray "${tmp}" "${protecteddirectories[@]}" ; then
+  echo "############ ATTENTION ############"
+  err "'tmp' VARIABLE IS SET TO '$tmp' WHICH IS A PROTECTED DIRECTORY! EXITING!"
+fi
+
+# Apply CPU-specific compiler variables defined inside bldpkg.conf
+# https://github.com/sakaki-/gentoo-on-rpi-64bit/blob/master/reference/compile_run_benchmarks.sh
+# https://www.raspberrypi.org/forums/viewtopic.php?t=11629
+# noarch is set inside initfs, pkgtools, GTK themes and some other stuff.
+
+# If $arch has not been exported by autobuild or not set in the individual build files that have
+# arch=noarch, we set our own. $HOSTTYPE is only set in the bash shell.
+[[ -z $arch ]] && arch="$HOSTTYPE"
+
+for compilervariable in CC CXX CFLAGS ; do
+  if [[ -z $compilervariable ]] ; then
+    err "$compilervariable not set in bldpkg.conf!"
+  fi
+done
+
+if [[ $arch = noarch ]]; then
+  CFLAGS=""
+
+elif [[ $arch = aarch64 ]]; then  
+  if [[ -n $debug ]]; then
+    CFLAGS="$gccdebug $CFLAGS"
+  fi
+
+elif [[ $arch = x86_64 ]]; then
+  if [[ -n $debug ]]; then
+    CFLAGS="$gccdebug $CFLAGS"
+  fi
+
+else
+  err "Sorry! '$arch' CPU architecture not supported by SMLinux!"
+fi
+
+CXXFLAGS="$CFLAGS"
+export hostdist builddist CC CXX CFLAGS CXXFLAGS
+
+# Inside a function, validate the compilers that have been set as CC and CXX in bldpkg.conf
+# A small C/CXX program is being used to print a random number
+
+# Generate a random number using shuf. We'll output this same number inside the C/CXX program.
+# If the numbers match, the compiler looks sane, else error out.
+randomnum="$(shuf -i 100-9999 -n1)"
+
+# Quotes are important while passing C/CXXFLAGS
+compilertestfile "$CC" "$CFLAGS" cc-test.c cc-test
+compilertestfile "$CXX" "$CXXFLAGS" cxx-test.cpp cxx-test
+
+# Validate everything related to ccache if ccache is set
+if [[ $ccache = 1 ]]; then
+  if [[ ! -x $ccachebinpath ]] ; then
+    err "Ccache binary was not found but ccache is enabled in bldpkg.conf!"
+  fi
+
+  checkcompilersymlink $ccachesymdirpath $ccachebinpath
+  
+  # Prepare $PATH and export it only if ccache is unset in the pkg build file
+  PATH="$ccachesymdirpath:$PATH"
+  export PATH
+fi
+
+# Validate everything related to sccache if ccache is set
+if [[ $sccache = 1 ]]; then
+   
+  if [[ ! -x $sccachebinpath ]] ; then
+    err "Oops! sccache binary was not found but building with it was requested! 
+Either ensure sccache is in your '$PATH' or disable this option in bldpkg.conf."
+  fi
+
+  # We expect the rustc wrapper to be defined in $HOME/.cargo/config.toml
+  if ! grep -q 'rustc-wrapper\ \= "\/bin\/sccache"' $HOME/.cargo/config.toml ; then
+    err 'sccache is not defined as a rustc wrapper!
+Please add the following to your '"$HOME/"'.cargo/config.toml:
+[build]
+rustc-wrapper = "/bin/sccache"'
+  fi
+
+  # Useful for rust-specific builds. 
+  RUSTC_WRAPPER="$sccachebinpath"
+  export RUSTC_WRAPPER
+
+  sccacheprocess start
+
+fi
+
+# Validate everything related to distcc if distcc is set
+if [[ $distcc = 1 ]] ; then
+  # Check if distcc exists and is an executable
+  if [[ ! -x $distccbinpath ]]; then
+    err "Distcc binary was not found but distcc is enabled in bldpkg.conf"
+  fi
+
+  checkcompilersymlink $distccsymdirpath $distccbinpath
+
+  # Prepare $PATH and export DISTCC_HOSTS and DISTCC_IO_TIMEOUT only if distcc is unset in the pkg build file
+  # netcat hosts inside $DISTCC_HOSTS by checking for an open port
+  info "Validating distcc hosts..."
+  # Check if we have nc
+  if [[ ! -x /bin/nc ]] ; then
+    warn "nc does not exist! Ignoring this..."
+  else 
+    # Remove the common options along with the slash and the numbers after it
+    hosts=$(echo "$DISTCC_HOSTS" | sed -e 's@/[a-z0-9,]*@@g' -e 's@--randomize@@' -e 's@localhost@@')
+    for host in ${hosts[@]} ; do
+      # We only run distccd on TCP port 3632
+      if ! /bin/nc -z -w 1 "$host" 3632 > /dev/null 2>&1 ; then
+        warn "Distcc host '$host' is OFFLINE! Rewriting DISTCC_HOSTS"
+        DISTCC_HOSTS=$(echo "$DISTCC_HOSTS" | sed "s@$host/[a-z0-9,]*@@")
+      fi
+    done
+  fi
+    
+  PATH="$distccsymdirpath:$PATH"
+  export DISTCC_HOSTS DISTCC_IO_TIMEOUT PATH
+fi
+
+# If verbosebuild is set in bldpkg.conf or if verbosity is set to 1 from getopts, set V and
+# VERBOSE environment variables for make and cmake build systems to pick up.
+if [[ $verbosebuild = 1 ]] || [[ $getoptsverbosebuild = 1 ]] ; then
+  V=1 
+  VERBOSE=1
+else
+  V=0
+  VERBOSE=0
+fi
+export V VERBOSE
+
+# If $noautoconfsite is unset in an individual package build file, export CONFIG_SITE variable into the build 
+# environment for a package's configure script to pickup. Most autoconf-compatible configure scripts will 
+# automatically pick up this variable from the environment and speed up the initial configure process. 
+if [[ -z $noautoconfsite ]] ; then
+  if [[ -n $configsite ]] && [[ -e $configsite ]]; then
+    CONFIG_SITE="$configsite"
+    export CONFIG_SITE
+  fi
+fi
+
+# Condition to reuse the autobuildtemp file if set from autobuild or make a new temporary file
+if [[ -n $autobuildtemp ]]; then
+  tempfile="$autobuildtemp"
+else
+  tempfile=$(mktemp "$parenttmp/SMBUILD.XXXXXX")
+fi
 
 # https://unix.stackexchange.com/questions/462392/bash-the-function-is-executed-twice
 # https://stackoverflow.com/questions/9256644/identifying-received-signal-name-in-bash/9256709