Migration of ngspice [ Pending on (1. git learning & 2.ngspice manual) ]

Trouble shooting: 

1. configure step 

     1.1 error  "Couldn't find Xaw library"  

            xaw library is a basic library for x window system, only libXaw is not enough for compiling, a develop-version is needed : libXaw-devel.  

      1.2 bison is needed fo XSPICE 

             bison is a general purpose parser of GNU project, this is needed for XSPICE, install the bison from GNU normally. 

       1.3 configure: error: Flex is required for building XSPICE. 

             solution: install flex. 

       1.4 If you want Verilog-A models you should install admsXml

              adms is a code generator that converts electrical compact device models specified in high-level description language into ready-to-compile c code

              for the API of spice simulators. Based on transformations specified in xml language adms transforms Verilog-AMS code into other target languages.

        1.5 Couldn't find GNU readline headers

               A useful link is found here: http://www.linuxquestions.org/questions/debian-26/the-question-of-ngspice-i-confused-815874/

               Solution: install the develop-verion of readline library.