From b1ccf66f234f4540d966732eb8e11e6ca26aa940 Mon Sep 17 00:00:00 2001
From: rahulp13
Date: Tue, 21 Jan 2020 17:33:52 +0530
Subject: update readme and xenial, bionic installers

---
 Debian/Ubuntu 14.04/install-nghdl.sh  |   6 +
 Debian/Ubuntu 16.04+/ghdl-0.36.tar.xz | Bin 9220896 -> 0 bytes
 Debian/Ubuntu 16.04+/install-nghdl.sh | 264 --------------------------------
 Debian/Ubuntu 16.04/ghdl-0.36.tar.xz  | Bin 0 -> 9220896 bytes
 Debian/Ubuntu 16.04/install-nghdl.sh  | 270 +++++++++++++++++++++++++++++++++
 Debian/Ubuntu 18.04/ghdl-0.36.tar.xz  | Bin 0 -> 3866028 bytes
 Debian/Ubuntu 18.04/install-nghdl.sh  | 278 ++++++++++++++++++++++++++++++++++
 Debian/readme.md                      |  59 +++++---
 readme.md                             |   2 +-
 9 files changed, 596 insertions(+), 283 deletions(-)
 delete mode 100644 Debian/Ubuntu 16.04+/ghdl-0.36.tar.xz
 delete mode 100755 Debian/Ubuntu 16.04+/install-nghdl.sh
 create mode 100644 Debian/Ubuntu 16.04/ghdl-0.36.tar.xz
 create mode 100755 Debian/Ubuntu 16.04/install-nghdl.sh
 create mode 100644 Debian/Ubuntu 18.04/ghdl-0.36.tar.xz
 create mode 100755 Debian/Ubuntu 18.04/install-nghdl.sh

diff --git a/Debian/Ubuntu 14.04/install-nghdl.sh b/Debian/Ubuntu 14.04/install-nghdl.sh
index 560b4df..905897f 100755
--- a/Debian/Ubuntu 14.04/install-nghdl.sh	
+++ b/Debian/Ubuntu 14.04/install-nghdl.sh	
@@ -81,6 +81,8 @@ function installDependency
             cd ghdl-0.36/
             #Copy compiled ghdl to system path
             sudo cp bin/* /usr/local/bin/
+            #Make it executable
+    		sudo chmod 755 /usr/local/bin/ghdl*
             if [ $? -ne 0 ]; then
                 echo "Unable to install ghdl-0.36 LLVM (@bin)"
                 echo "Exiting installation..."
@@ -158,6 +160,8 @@ function installNgspice
                     echo "Remove earlier installations at /usr/bin/ngspice and try again..."
                     exit 1
                 else
+                	#Make it executable
+    				sudo chmod 755 /usr/bin/ngspice
                     echo "Added softlink for Ngspice"
                 fi
 
@@ -213,6 +217,8 @@ function createSoftLink
             echo "Remove earlier installations at /usr/local/bin/nghdl and try again..."
             exit 1
         else
+        	#Make it executable
+    		sudo chmod 755 nghdl
             echo "Added softlink for NGHDL..............................."
         fi
     fi
diff --git a/Debian/Ubuntu 16.04+/ghdl-0.36.tar.xz b/Debian/Ubuntu 16.04+/ghdl-0.36.tar.xz
deleted file mode 100644
index 30cd636..0000000
Binary files a/Debian/Ubuntu 16.04+/ghdl-0.36.tar.xz and /dev/null differ
diff --git a/Debian/Ubuntu 16.04+/install-nghdl.sh b/Debian/Ubuntu 16.04+/install-nghdl.sh
deleted file mode 100755
index 221487c..0000000
--- a/Debian/Ubuntu 16.04+/install-nghdl.sh	
+++ /dev/null
@@ -1,264 +0,0 @@
-#!/bin/bash 
-#===============================================================================
-#          FILE: install-nghdl.sh
-# 
-#         USAGE: ./install-nghdl.sh --install
-#                 or
-#                ./install-nghdl.sh --uninstall
-# 
-#   DESCRIPTION: It is installation script for ngspice and ghdl work (nghdl). 
-# 
-#       OPTIONS: ---
-#  REQUIREMENTS: ---
-#          BUGS: ---
-#         NOTES: ---
-#        AUTHOR: Fahim Khan, Rahul Paknikar
-#  ORGANIZATION: eSim, FOSSEE group at IIT Bombay
-#       CREATED: Monday 20 January 2020 16:30
-#      REVISION:  ---
-#===============================================================================
-
-ngspice="ngspice-nghdl"
-ghdl="ghdl-0.36"
-config_dir="$HOME/.nghdl"
-config_file="config.ini"
-src_dir=`pwd`
-
-#Will be used to take backup of any file
-sysdate="$(date)"
-timestamp=`echo $sysdate|awk '{print $3"_"$2"_"$6"_"$4 }'`
-
-
-#All functions goes here
-function installDependency
-{
-
-    echo "Installing Make..........................................."
-    sudo apt install -y make
-    if [ $? -ne 0 ]; then
-        echo -e "\n\n\"Make\" dependency couldn't be installed.\nKindly resolve above errors and try again."
-        exit 1
-    fi
-    
-    echo "Installing GNAT-5........................................."
-    sudo apt install -y gnat-5
-    if [ $? -ne 0 ]; then
-        echo -e "\n\n\"GNAT\" dependency couldn't be installed.\nKindly resolve above errors and try again."
-        exit 1
-    fi
-
-    echo "Installing Zlib1g-dev....................................."
-    sudo apt install -y zlib1g-dev
-    if [ $? -ne 0 ]; then
-        echo -e "\n\n\"Zlib1g-dev\" dependency couldn't be installed.\nKindly resolve above errors and try again."
-        exit 1
-    fi
-  
-    # Specific dependency for nvidia graphic cards
-    echo "Installing graphics dependency for ngspice souce build"
-    echo "Installing libxaw7........................................"
-    sudo apt install -y libxaw7
-    if [ $? -ne 0 ]; then
-        echo -e "\n\n\"libxaw7\" dependency couldn't be installed.\nKindly resolve above errors and try again."
-        exit 1
-    fi
-
-    echo "Installing libxaw7-dev...................................."
-    sudo apt install -y libxaw7-dev
-    if [ $? -ne 0 ]; then
-        echo -e "\n\n\"libxaw7-dev\" dependency couldn't be installed.\nKindly resolve above \"apt-get\" errors and try again."
-        exit 1
-    fi
-
-
-    echo "Installing GHDL-0.36 LLVM................................."
-    grep -h "ghdl" /usr/local/bin/ghdl > /dev/null
-    if [ $? -ne 0 ]; then
-        tar -xJf ghdl-0.36.tar.xz
-        if [ "$?" == 0 ]; then
-            echo "ghdl-0.36 successfully extracted.................."
-            echo "Changing directory to ghdl-0.36 installation......"
-            cd ghdl-0.36/
-            #Copy compiled ghdl to system path
-            sudo cp bin/* /usr/local/bin/
-            if [ $? -ne 0 ]; then
-                echo "Unable to install ghdl-0.36 LLVM (@bin)"
-                echo "Exiting installation..."
-                exit 1
-            fi
-            sudo cp include/* /usr/local/include/
-            if [ $? -ne 0 ]; then
-                echo "Unable to install ghdl-0.36 LLVM (@include)"
-                echo "Exiting installation..."
-                exit 1
-            fi
-            sudo cp -r lib/* /usr/local/lib/
-            if [ $? -ne 0 ]; then
-                echo "Unable to install ghdl-0.36 LLVM (@lib)"
-                echo "Exiting installation..."
-                exit 1
-            fi
-            echo "Removing unused part of ghdl-0.36 LLVM..."
-    		rm -rf ../ghdl-0.36
-            echo "GHDL installed successfully......................."
-        else
-            echo "Unable to extract ghdl-0.36 LLVM"
-            echo "Exiting installation"
-            exit 1
-        fi
-    else
-        echo "GHDL already exists..."
-        echo "Leaving ghdl-0.36 LLVM installation"
-    fi
-    
-}
-
-
-function installNgspice
-{
-
-    echo "Installing Ngspice........................................"
-    #Checking if ngspice-nghdl directory is already present in Home directory
-    if [ -d $HOME/$ngspice ];then
-        echo "$ngspice directory already exists at $HOME"
-        echo "Leaving Ngspice installation..."
-    else
-        #Extracting Ngspice to Home Directory
-        cd $src_dir
-        tar -xJf $ngspice.tar.xz -C $HOME 
-        if [ "$?" == 0 ];then 
-            echo "Ngspice extracted sucessfuly to $HOME"
-            #change to ngspice-nghdl directory
-            cd $HOME/$ngspice
-            #Make local install directory
-            mkdir -p install_dir
-            #Make release directory for build
-            mkdir -p release
-            #Change to release directory
-            cd release
-            echo "Configuring Ngspice..."
-            sleep 2
-            ../configure --enable-xspice --disable-debug  --prefix=$HOME/$ngspice/install_dir/ --exec-prefix=$HOME/$ngspice/install_dir/
-            
-            #dirty fix for adding patch to ngspice base code
-            cp $src_dir/src/outitf.c $HOME/$ngspice/src/frontend
-
-            make
-            make install
-            if [ "$?" == 0 ];then
-                echo "Removing previously installed Ngspice (if any)..."
-                sudo apt-get purge -y ngspice
-
-                echo "Ngspice installed sucessfully................."
-                echo "Adding softlink for the installed Ngspice....."
-
-                sudo ln -s $HOME/$ngspice/install_dir/bin/ngspice /usr/bin/ngspice
-                if [ $? -ne 0 ];then
-                    echo "Failed to add Ngspice softlink"
-                    echo "Remove earlier installations at /usr/bin/ngspice and try again..."
-                    exit 1
-                else
-                    echo "Added softlink for Ngspice"
-                fi
-
-            else 
-                echo "There was some error while installing Ngspice"
-            fi
-
-        else 
-            echo "Unable to extract Ngspice tar file"
-            exit 1;
-        fi
-    fi
-
-}
-
-
-function createConfigFile
-{
-    
-    #Creating config.ini file and adding configuration information
-    #Check if config file is present
-    if [ -d $config_dir ];then
-        rm $config_dir/$config_file && touch $config_dir/$config_file
-    else
-        mkdir $config_dir && touch $config_dir/$config_file
-    fi
-    
-    echo "[NGSPICE]" >> $config_dir/$config_file
-    echo "NGSPICE_HOME = $HOME/$ngspice" >> $config_dir/$config_file
-    echo "DIGITAL_MODEL = %(NGSPICE_HOME)s/src/xspice/icm/ghdl" >> $config_dir/$config_file
-    echo "RELEASE = %(NGSPICE_HOME)s/release" >> $config_dir/$config_file
-    echo "[SRC]" >> $config_dir/$config_file
-    echo "SRC_HOME = $src_dir" >> $config_dir/$config_file
-    echo "LICENSE = %(SRC_HOME)s/LICENSE" >> $config_dir/$config_file
-
-}
-
-
-function createSoftLink
-{
-    
-    ## Creating softlink 
-    cd /usr/local/bin
-    if [[ -L nghdl ]];then
-        echo "Symlink was already present"
-        sudo unlink nghdl
-        sudo ln -sf $src_dir/src/ngspice_ghdl.py nghdl
-    else
-        echo "Creating symlink"
-        sudo ln -sf $src_dir/src/ngspice_ghdl.py nghdl
-        if [ $? -ne 0 ];then
-            echo "Failed to add NGHDL softlink"
-            echo "Remove earlier installations at /usr/local/bin/nghdl and try again..."
-            exit 1
-        else
-            echo "Added softlink for NGHDL..............................."
-        fi
-    fi
-    cd $pwd
-
-}
-
-
-#####################################################################
-#       Script start from here                                     #
-#####################################################################
-
-###Checking if file is passsed as argument to script
-
-if [ "$#" -eq 1 ];then
-    option=$1
-else
-    echo "USAGE : "
-    echo "./install-nghdl.sh --install"
-    exit 1;
-fi
-
-##Checking flags
-if [ $option == "--install" ];then
-    
-    #Calling functions
-    installDependency
-    if [ $? -ne 0 ];then
-        echo -e "\n\n\nERROR: Unable to install required packages. Please check your internet connection.\n\n"
-        exit 0
-    fi
-    installNgspice
-    createConfigFile
-    createSoftLink
-
-elif [ $option == "--uninstall" ];then
-    echo "Removing NGHDL....................."
-    sudo rm -rf $HOME/ngspice-nghdl $HOME/.nghdl /usr/share/kicad/library/eSim_Nghdl.lib /usr/local/bin/nghdl /usr/bin/ngspice
-    echo "Removing libxaw7-dev..............."
-    sudo apt purge -y libxaw7-dev
-    echo "Removing GHDL............."
-    sudo rm -rf /usr/local/bin/ghdl /usr/local/bin/ghdl1-llvm /usr/local/lib/ghdl /usr/local/lib/libghdlvpi.so /usr/local/include/vpi_user.h
-    echo "Removing GNAT-5...................."
-    sudo apt purge -y gnat-5
-else 
-    echo "Please select the proper operation."
-    echo "--install"
-    echo "--uninstall"
-fi
diff --git a/Debian/Ubuntu 16.04/ghdl-0.36.tar.xz b/Debian/Ubuntu 16.04/ghdl-0.36.tar.xz
new file mode 100644
index 0000000..30cd636
Binary files /dev/null and b/Debian/Ubuntu 16.04/ghdl-0.36.tar.xz differ
diff --git a/Debian/Ubuntu 16.04/install-nghdl.sh b/Debian/Ubuntu 16.04/install-nghdl.sh
new file mode 100755
index 0000000..6080018
--- /dev/null
+++ b/Debian/Ubuntu 16.04/install-nghdl.sh	
@@ -0,0 +1,270 @@
+#!/bin/bash 
+#===============================================================================
+#          FILE: install-nghdl.sh
+# 
+#         USAGE: ./install-nghdl.sh --install
+#                 or
+#                ./install-nghdl.sh --uninstall
+# 
+#   DESCRIPTION: It is installation script for ngspice and ghdl work (nghdl). 
+# 
+#       OPTIONS: ---
+#  REQUIREMENTS: ---
+#          BUGS: ---
+#         NOTES: ---
+#        AUTHOR: Fahim Khan, Rahul Paknikar
+#  ORGANIZATION: eSim, FOSSEE group at IIT Bombay
+#       CREATED: Monday 20 January 2020 16:30
+#      REVISION:  ---
+#===============================================================================
+
+ngspice="ngspice-nghdl"
+ghdl="ghdl-0.36"
+config_dir="$HOME/.nghdl"
+config_file="config.ini"
+src_dir=`pwd`
+
+#Will be used to take backup of any file
+sysdate="$(date)"
+timestamp=`echo $sysdate|awk '{print $3"_"$2"_"$6"_"$4 }'`
+
+
+#All functions goes here
+function installDependency
+{
+
+    echo "Installing Make..........................................."
+    sudo apt install -y make
+    if [ $? -ne 0 ]; then
+        echo -e "\n\n\"Make\" dependency couldn't be installed.\nKindly resolve above errors and try again."
+        exit 1
+    fi
+    
+    echo "Installing GNAT-5........................................."
+    sudo apt install -y gnat-5
+    if [ $? -ne 0 ]; then
+        echo -e "\n\n\"GNAT\" dependency couldn't be installed.\nKindly resolve above errors and try again."
+        exit 1
+    fi
+
+    echo "Installing Zlib1g-dev....................................."
+    sudo apt install -y zlib1g-dev
+    if [ $? -ne 0 ]; then
+        echo -e "\n\n\"Zlib1g-dev\" dependency couldn't be installed.\nKindly resolve above errors and try again."
+        exit 1
+    fi
+  
+    # Specific dependency for nvidia graphic cards
+    echo "Installing graphics dependency for ngspice souce build"
+    echo "Installing libxaw7........................................"
+    sudo apt install -y libxaw7
+    if [ $? -ne 0 ]; then
+        echo -e "\n\n\"libxaw7\" dependency couldn't be installed.\nKindly resolve above errors and try again."
+        exit 1
+    fi
+
+    echo "Installing libxaw7-dev...................................."
+    sudo apt install -y libxaw7-dev
+    if [ $? -ne 0 ]; then
+        echo -e "\n\n\"libxaw7-dev\" dependency couldn't be installed.\nKindly resolve above \"apt-get\" errors and try again."
+        exit 1
+    fi
+
+
+    echo "Installing GHDL-0.36 LLVM................................."
+    grep -h "ghdl" /usr/local/bin/ghdl > /dev/null
+    if [ $? -ne 0 ]; then
+        tar -xJf ghdl-0.36.tar.xz
+        if [ "$?" == 0 ]; then
+            echo "ghdl-0.36 successfully extracted.................."
+            echo "Changing directory to ghdl-0.36 installation......"
+            cd ghdl-0.36/
+            #Copy compiled ghdl to system path
+            sudo cp bin/* /usr/local/bin/
+            #Make it executable
+    		sudo chmod 755 /usr/local/bin/ghdl*
+            if [ $? -ne 0 ]; then
+                echo "Unable to install ghdl-0.36 LLVM (@bin)"
+                echo "Exiting installation..."
+                exit 1
+            fi
+            sudo cp include/* /usr/local/include/
+            if [ $? -ne 0 ]; then
+                echo "Unable to install ghdl-0.36 LLVM (@include)"
+                echo "Exiting installation..."
+                exit 1
+            fi
+            sudo cp -r lib/* /usr/local/lib/
+            if [ $? -ne 0 ]; then
+                echo "Unable to install ghdl-0.36 LLVM (@lib)"
+                echo "Exiting installation..."
+                exit 1
+            fi
+            echo "Removing unused part of ghdl-0.36 LLVM..."
+    		rm -rf ../ghdl-0.36
+            echo "GHDL installed successfully......................."
+        else
+            echo "Unable to extract ghdl-0.36 LLVM"
+            echo "Exiting installation"
+            exit 1
+        fi
+    else
+        echo "GHDL already exists..."
+        echo "Leaving ghdl-0.36 LLVM installation"
+    fi
+    
+}
+
+
+function installNgspice
+{
+
+    echo "Installing Ngspice........................................"
+    #Checking if ngspice-nghdl directory is already present in Home directory
+    if [ -d $HOME/$ngspice ];then
+        echo "$ngspice directory already exists at $HOME"
+        echo "Leaving Ngspice installation..."
+    else
+        #Extracting Ngspice to Home Directory
+        cd $src_dir
+        tar -xJf $ngspice.tar.xz -C $HOME 
+        if [ "$?" == 0 ];then 
+            echo "Ngspice extracted sucessfuly to $HOME"
+            #change to ngspice-nghdl directory
+            cd $HOME/$ngspice
+            #Make local install directory
+            mkdir -p install_dir
+            #Make release directory for build
+            mkdir -p release
+            #Change to release directory
+            cd release
+            echo "Configuring Ngspice..."
+            sleep 2
+            ../configure --enable-xspice --disable-debug  --prefix=$HOME/$ngspice/install_dir/ --exec-prefix=$HOME/$ngspice/install_dir/
+            
+            #dirty fix for adding patch to ngspice base code
+            cp $src_dir/src/outitf.c $HOME/$ngspice/src/frontend
+
+            make
+            make install
+            if [ "$?" == 0 ];then
+                echo "Removing previously installed Ngspice (if any)..."
+                sudo apt-get purge -y ngspice
+
+                echo "Ngspice installed sucessfully................."
+                echo "Adding softlink for the installed Ngspice....."
+
+                sudo ln -s $HOME/$ngspice/install_dir/bin/ngspice /usr/bin/ngspice
+                if [ $? -ne 0 ];then
+                    echo "Failed to add Ngspice softlink"
+                    echo "Remove earlier installations at /usr/bin/ngspice and try again..."
+                    exit 1
+                else
+                	#Make it executable
+    				sudo chmod 755 /usr/bin/ngspice
+                    echo "Added softlink for Ngspice"
+                fi
+
+            else 
+                echo "There was some error while installing Ngspice"
+            fi
+
+        else 
+            echo "Unable to extract Ngspice tar file"
+            exit 1;
+        fi
+    fi
+
+}
+
+
+function createConfigFile
+{
+    
+    #Creating config.ini file and adding configuration information
+    #Check if config file is present
+    if [ -d $config_dir ];then
+        rm $config_dir/$config_file && touch $config_dir/$config_file
+    else
+        mkdir $config_dir && touch $config_dir/$config_file
+    fi
+    
+    echo "[NGSPICE]" >> $config_dir/$config_file
+    echo "NGSPICE_HOME = $HOME/$ngspice" >> $config_dir/$config_file
+    echo "DIGITAL_MODEL = %(NGSPICE_HOME)s/src/xspice/icm/ghdl" >> $config_dir/$config_file
+    echo "RELEASE = %(NGSPICE_HOME)s/release" >> $config_dir/$config_file
+    echo "[SRC]" >> $config_dir/$config_file
+    echo "SRC_HOME = $src_dir" >> $config_dir/$config_file
+    echo "LICENSE = %(SRC_HOME)s/LICENSE" >> $config_dir/$config_file
+
+}
+
+
+function createSoftLink
+{
+    
+    ## Creating softlink 
+    cd /usr/local/bin
+    if [[ -L nghdl ]];then
+        echo "Symlink was already present"
+        sudo unlink nghdl
+        sudo ln -sf $src_dir/src/ngspice_ghdl.py nghdl
+    else
+        echo "Creating symlink"
+        sudo ln -sf $src_dir/src/ngspice_ghdl.py nghdl
+        if [ $? -ne 0 ];then
+            echo "Failed to add NGHDL softlink"
+            echo "Remove earlier installations at /usr/local/bin/nghdl and try again..."
+            exit 1
+        else
+        	#Make it executable
+    		sudo chmod 755 nghdl
+            echo "Added softlink for NGHDL..............................."
+        fi
+    fi
+    cd $pwd
+
+}
+
+
+#####################################################################
+#       Script start from here                                     #
+#####################################################################
+
+###Checking if file is passsed as argument to script
+
+if [ "$#" -eq 1 ];then
+    option=$1
+else
+    echo "USAGE : "
+    echo "./install-nghdl.sh --install"
+    exit 1;
+fi
+
+##Checking flags
+if [ $option == "--install" ];then
+    
+    #Calling functions
+    installDependency
+    if [ $? -ne 0 ];then
+        echo -e "\n\n\nERROR: Unable to install required packages. Please check your internet connection.\n\n"
+        exit 0
+    fi
+    installNgspice
+    createConfigFile
+    createSoftLink
+
+elif [ $option == "--uninstall" ];then
+    echo "Removing NGHDL....................."
+    sudo rm -rf $HOME/ngspice-nghdl $HOME/.nghdl /usr/share/kicad/library/eSim_Nghdl.lib /usr/local/bin/nghdl /usr/bin/ngspice
+    echo "Removing libxaw7-dev..............."
+    sudo apt purge -y libxaw7-dev
+    echo "Removing GHDL............."
+    sudo rm -rf /usr/local/bin/ghdl /usr/local/bin/ghdl1-llvm /usr/local/lib/ghdl /usr/local/lib/libghdlvpi.so /usr/local/include/vpi_user.h
+    echo "Removing GNAT-5...................."
+    sudo apt purge -y gnat-5
+else 
+    echo "Please select the proper operation."
+    echo "--install"
+    echo "--uninstall"
+fi
diff --git a/Debian/Ubuntu 18.04/ghdl-0.36.tar.xz b/Debian/Ubuntu 18.04/ghdl-0.36.tar.xz
new file mode 100644
index 0000000..a4a161f
Binary files /dev/null and b/Debian/Ubuntu 18.04/ghdl-0.36.tar.xz differ
diff --git a/Debian/Ubuntu 18.04/install-nghdl.sh b/Debian/Ubuntu 18.04/install-nghdl.sh
new file mode 100755
index 0000000..b3439ca
--- /dev/null
+++ b/Debian/Ubuntu 18.04/install-nghdl.sh	
@@ -0,0 +1,278 @@
+#!/bin/bash 
+#===============================================================================
+#          FILE: install-nghdl.sh
+# 
+#         USAGE: ./install-nghdl.sh --install
+#                 or
+#                ./install-nghdl.sh --uninstall
+# 
+#   DESCRIPTION: It is installation script for ngspice and ghdl work (nghdl). 
+# 
+#       OPTIONS: ---
+#  REQUIREMENTS: ---
+#          BUGS: ---
+#         NOTES: ---
+#        AUTHOR: Fahim Khan, Rahul Paknikar
+#  ORGANIZATION: eSim, FOSSEE group at IIT Bombay
+#       CREATED: Monday 20 January 2020 16:30
+#      REVISION:  ---
+#===============================================================================
+
+ngspice="ngspice-nghdl"
+ghdl="ghdl-0.36"
+config_dir="$HOME/.nghdl"
+config_file="config.ini"
+src_dir=`pwd`
+
+#Will be used to take backup of any file
+sysdate="$(date)"
+timestamp=`echo $sysdate|awk '{print $3"_"$2"_"$6"_"$4 }'`
+
+
+#All functions goes here
+function installDependency
+{
+
+    echo "Installing Make..........................................."
+    sudo apt install -y make
+    if [ $? -ne 0 ]; then
+        echo -e "\n\n\"Make\" dependency couldn't be installed.\nKindly resolve above errors and try again."
+        exit 1
+    fi
+    
+    echo "Installing GNAT-5........................................."
+    sudo apt install -y gnat-5
+    if [ $? -ne 0 ]; then
+        echo -e "\n\n\"GNAT\" dependency couldn't be installed.\nKindly resolve above errors and try again."
+        exit 1
+    fi
+
+    echo "Installing Zlib1g-dev....................................."
+    sudo apt install -y zlib1g-dev
+    if [ $? -ne 0 ]; then
+        echo -e "\n\n\"Zlib1g-dev\" dependency couldn't be installed.\nKindly resolve above errors and try again."
+        exit 1
+    fi
+  
+    # Specific dependency for canberra-gtk modules
+    echo "Installing Gtk Canberra modules..........................."
+    sudo apt install -y libcanberra-gtk-module libcanberra-gtk3-module
+    if [ $? -ne 0 ]; then
+        echo -e "\n\n\"canberra-gtk-module\" dependency couldn't be installed.\nKindly resolve above errors and try again."
+        exit 1
+    fi  
+
+    # Specific dependency for nvidia graphic cards
+    echo "Installing graphics dependency for ngspice souce build"
+    echo "Installing libxaw7........................................"
+    sudo apt install -y libxaw7
+    if [ $? -ne 0 ]; then
+        echo -e "\n\n\"libxaw7\" dependency couldn't be installed.\nKindly resolve above errors and try again."
+        exit 1
+    fi
+
+    echo "Installing libxaw7-dev...................................."
+    sudo apt install -y libxaw7-dev
+    if [ $? -ne 0 ]; then
+        echo -e "\n\n\"libxaw7-dev\" dependency couldn't be installed.\nKindly resolve above \"apt-get\" errors and try again."
+        exit 1
+    fi
+
+
+    echo "Installing GHDL-0.36 LLVM................................."
+    grep -h "ghdl" /usr/local/bin/ghdl > /dev/null
+    if [ $? -ne 0 ]; then
+        tar -xJf ghdl-0.36.tar.xz
+        if [ "$?" == 0 ]; then
+            echo "ghdl-0.36 successfully extracted.................."
+            echo "Changing directory to ghdl-0.36 installation......"
+            cd ghdl-0.36/
+            #Copy compiled ghdl to system path
+            sudo cp bin/* /usr/local/bin/
+            #Make it executable
+    		sudo chmod 755 /usr/local/bin/ghdl*
+            if [ $? -ne 0 ]; then
+                echo "Unable to install ghdl-0.36 LLVM (@bin)"
+                echo "Exiting installation..."
+                exit 1
+            fi
+            sudo cp include/* /usr/local/include/
+            if [ $? -ne 0 ]; then
+                echo "Unable to install ghdl-0.36 LLVM (@include)"
+                echo "Exiting installation..."
+                exit 1
+            fi
+            sudo cp -r lib/* /usr/local/lib/
+            if [ $? -ne 0 ]; then
+                echo "Unable to install ghdl-0.36 LLVM (@lib)"
+                echo "Exiting installation..."
+                exit 1
+            fi
+            echo "Removing unused part of ghdl-0.36 LLVM..."
+    		rm -rf ../ghdl-0.36
+            echo "GHDL installed successfully......................."
+        else
+            echo "Unable to extract ghdl-0.36 LLVM"
+            echo "Exiting installation"
+            exit 1
+        fi
+    else
+        echo "GHDL already exists..."
+        echo "Leaving ghdl-0.36 LLVM installation"
+    fi
+    
+}
+
+
+function installNgspice
+{
+
+    echo "Installing Ngspice........................................"
+    #Checking if ngspice-nghdl directory is already present in Home directory
+    if [ -d $HOME/$ngspice ];then
+        echo "$ngspice directory already exists at $HOME"
+        echo "Leaving Ngspice installation..."
+    else
+        #Extracting Ngspice to Home Directory
+        cd $src_dir
+        tar -xJf $ngspice.tar.xz -C $HOME 
+        if [ "$?" == 0 ];then 
+            echo "Ngspice extracted sucessfuly to $HOME"
+            #change to ngspice-nghdl directory
+            cd $HOME/$ngspice
+            #Make local install directory
+            mkdir -p install_dir
+            #Make release directory for build
+            mkdir -p release
+            #Change to release directory
+            cd release
+            echo "Configuring Ngspice..."
+            sleep 2
+            ../configure --enable-xspice --disable-debug  --prefix=$HOME/$ngspice/install_dir/ --exec-prefix=$HOME/$ngspice/install_dir/
+            
+            #dirty fix for adding patch to ngspice base code
+            cp $src_dir/src/outitf.c $HOME/$ngspice/src/frontend
+
+            make
+            make install
+            if [ "$?" == 0 ];then
+                echo "Removing previously installed Ngspice (if any)..."
+                sudo apt-get purge -y ngspice
+
+                echo "Ngspice installed sucessfully................."
+                echo "Adding softlink for the installed Ngspice....."
+
+                sudo ln -s $HOME/$ngspice/install_dir/bin/ngspice /usr/bin/ngspice
+                if [ $? -ne 0 ];then
+                    echo "Failed to add Ngspice softlink"
+                    echo "Remove earlier installations at /usr/bin/ngspice and try again..."
+                    exit 1
+                else
+                	#Make it executable
+    				sudo chmod 755 /usr/bin/ngspice
+                    echo "Added softlink for Ngspice"
+                fi
+
+            else 
+                echo "There was some error while installing Ngspice"
+            fi
+
+        else 
+            echo "Unable to extract Ngspice tar file"
+            exit 1;
+        fi
+    fi
+
+}
+
+
+function createConfigFile
+{
+    
+    #Creating config.ini file and adding configuration information
+    #Check if config file is present
+    if [ -d $config_dir ];then
+        rm $config_dir/$config_file && touch $config_dir/$config_file
+    else
+        mkdir $config_dir && touch $config_dir/$config_file
+    fi
+    
+    echo "[NGSPICE]" >> $config_dir/$config_file
+    echo "NGSPICE_HOME = $HOME/$ngspice" >> $config_dir/$config_file
+    echo "DIGITAL_MODEL = %(NGSPICE_HOME)s/src/xspice/icm/ghdl" >> $config_dir/$config_file
+    echo "RELEASE = %(NGSPICE_HOME)s/release" >> $config_dir/$config_file
+    echo "[SRC]" >> $config_dir/$config_file
+    echo "SRC_HOME = $src_dir" >> $config_dir/$config_file
+    echo "LICENSE = %(SRC_HOME)s/LICENSE" >> $config_dir/$config_file
+
+}
+
+
+function createSoftLink
+{
+    
+    ## Creating softlink 
+    cd /usr/local/bin
+    if [[ -L nghdl ]];then
+        echo "Symlink was already present"
+        sudo unlink nghdl
+        sudo ln -sf $src_dir/src/ngspice_ghdl.py nghdl
+    else
+        echo "Creating symlink"
+        sudo ln -sf $src_dir/src/ngspice_ghdl.py nghdl
+        if [ $? -ne 0 ];then
+            echo "Failed to add NGHDL softlink"
+            echo "Remove earlier installations at /usr/local/bin/nghdl and try again..."
+            exit 1
+        else
+        	#Make it executable
+    		sudo chmod 755 /usr/bin/nghdl
+            echo "Added softlink for NGHDL..............................."
+        fi
+    fi
+    cd $pwd
+
+}
+
+
+#####################################################################
+#       Script start from here                                     #
+#####################################################################
+
+###Checking if file is passsed as argument to script
+
+if [ "$#" -eq 1 ];then
+    option=$1
+else
+    echo "USAGE : "
+    echo "./install-nghdl.sh --install"
+    exit 1;
+fi
+
+##Checking flags
+if [ $option == "--install" ];then
+    
+    #Calling functions
+    installDependency
+    if [ $? -ne 0 ];then
+        echo -e "\n\n\nERROR: Unable to install required packages. Please check your internet connection.\n\n"
+        exit 0
+    fi
+    installNgspice
+    createConfigFile
+    createSoftLink
+
+elif [ $option == "--uninstall" ];then
+    echo "Removing NGHDL....................."
+    sudo rm -rf $HOME/ngspice-nghdl $HOME/.nghdl /usr/share/kicad/library/eSim_Nghdl.lib /usr/local/bin/nghdl /usr/bin/ngspice
+    echo "Removing libxaw7-dev..............."
+    sudo apt purge -y libxaw7-dev
+    echo "Removing GHDL............."
+    sudo rm -rf /usr/local/bin/ghdl /usr/local/bin/ghdl1-llvm /usr/local/lib/ghdl /usr/local/lib/libghdlvpi.so /usr/local/include/vpi_user.h
+    echo "Removing GNAT-5...................."
+    sudo apt purge -y gnat-5
+else 
+    echo "Please select the proper operation."
+    echo "--install"
+    echo "--uninstall"
+fi
diff --git a/Debian/readme.md b/Debian/readme.md
index 8bd5e21..08f1411 100644
--- a/Debian/readme.md
+++ b/Debian/readme.md
@@ -5,22 +5,26 @@ Debian Installer Documentation
 It contains all the documenation for installers on Debian (Ubuntu 14.04 and above).
 
 
-## Separation of Ubuntu 14.04 and Ubuntu 16.04+ installers:
-1. Dependency of gnat : 
-	a. Ubuntu 14.04 : gnat (v4.6)
-	b. Ubuntu 16.04+: gnat-5 (v5.4)
-2. Dependency of llvm :
+## Differences in Ubuntu 14.04, Ubuntu 16.04 and Ubuntu 18.04 installers:
+1. Dependency on gnat :
+	- Ubuntu 14.04 : gnat (v4.6)
+	- Ubuntu 16.04+: gnat-5 (v5.4)
+2. Dependency on llvm :
 	- Available version on Ubuntu 14.04 : llvm (v3.4)
-	- Available version on Ubuntu 16.04+ : llvm (v3.4)
+	- Available version on Ubuntu 16.04 : llvm (v3.5)
+	- Available version on Ubuntu 18.04 : llvm (v6.0)
 	- Requires llvm version between 3.5 and 3.9 for compilation of GHDL with llvm config
+3. Dependency on gcc : 
+	- Ubuntu 14.04 and 16.04 : gcc (v5.4.0) is available without pie (i.e. position-independent executable)
+	- Ubuntu 18.04 : gcc (v7.4.0) is available with pie enabled as default option.
+	- Refer [this](https://github.com/ghdl/ghdl/issues/213) Github issue for dependency on gcc GHDL on Ubuntu 18.04 and above.
 
 
-##GHDL Compilation:
-1. Following steps are OS specific and GHDL executables should be generated on that system for distribution on 
-same OS configuration.
-2. For distribution of GHDL on Ubuntu 14.04, directly use the llvm code provided on GHDL's github page.
-3. For distribution of GHDL on Ubuntu 16.04 and above, follow the steps:
-	a. Download source code from GHDL's github page.
+## GHDL Compilation:
+1. Compilation of GHDL is OS specific and GHDL executables should be generated on that system for distribution on same OS configuration.
+2. For distribution of GHDL (v0.36) on Ubuntu 14.04, directly use the llvm executable provided on GHDL's Github page.
+3. For distribution of GHDL (v0.36) on Ubuntu 16.04 and above, follow the steps:
+	a. Download source code (v0.36) from GHDL's Github page.
 	b. Extract the tar file, open a terminal and change directory one-level inside.
 	c. First install gnat dependency as:
 	
@@ -28,21 +32,40 @@ same OS configuration.
 
 	d. Install llvm dependency and verify that version of llvm is between 3.5 and 3.9
 
-		$ sudo apt install llvm
+		- For Ubuntu 16.04 :
 
-	e. To compile GHDL, type following commands:
+			$ sudo apt install llvm
+
+		- For Ubuntu 18.04 :
+
+			$ sudo apt install llvm-3.9
+
+	e. Install clang dependency:
+
+		$ sudo apt install clang
+
+
+	f. To compile GHDL, type following commands:
 
 		$ mkdir -p install_dir
 		$ mkdir -p release
 		$ cd release/
-		$ ../configure --with-llvm-config --prefix=<absolute_path_to_install_dir>
+
+		- For Ubuntu 16.04 :
+
+			$ ../configure --with-llvm-config --prefix=<absolute_path_to_install_dir>
+
+		- For Ubuntu 18.04 :
+
+			$ ../configure --with-llvm-config=/usr/bin/llvm-config-3.9 --prefix=<absolute_path_to_install_dir>
+
 		$ make
 		$ make install
 
 	f. GHDL executables will be made in install_dir folder which can be used for distribution.
-	g. Note that target machine should have the same version of gnat as that of the source machine on which 
-	   GHDL was compiled.
+	g. Note that target machine should have the same version of gnat and OS as that of the source machine on which GHDL was compiled.
+
 
-##How to package GHDL executable with NGHDL?
+## How to package GHDL executable with NGHDL?
 1. Rename `install_dir` directory to the `ghdl-<version>` and compress it to `.tar.xz` format.
 2. Place this compressed file along with the installer file (`install-nghdl.sh`) in the `nghdl` folder.
diff --git a/readme.md b/readme.md
index 17860e3..20f4553 100644
--- a/readme.md
+++ b/readme.md
@@ -4,7 +4,7 @@ NGHDL Installers
 It contains all the documenation for making installations on various platforms.
 
 
-##How to package NGHDL with eSim?
+## How to package NGHDL with eSim?
 1. Add GHDL executable and the corresponding installer for the target OS in the `nghdl` folder.
 
 > Note : Instructions on how to generate GHDL executable and distribute it are provided under 
-- 
cgit