# **rpn v2.3** - generation

For now rpn is proposed only for **GNU/Linux**

It can be generated following the steps below

## version identification

rpn is dynamically linked against
- GNU MP v6.1.2
- GNU MPFR v3.1.5

and embeds the source code of linenoise-ng v1.0.1

It is necessary to get MPFR and linenoise-ng to generate rpn.

## install GNU MPFR v3.1.5-p8 headers

- download **GNU MPFR v3.1.5-p8** from http://www.mpfr.org
- install it with usual autotools commands `./configure && make && make install`

## install linenoise-ng v1.0.1 source code

- download **linenoise-ng v1.0.1** from https://github.com/arangodb/linenoise-ng
- checkout the tag v1.0.1
- apply the following patch to the source code

```
--- ../../../linenoise-ng/src/linenoise.cpp	2017-06-10 18:13:31.752976287 +0200
+++ linenoise.cpp	2017-06-12 18:54:50.481794824 +0200
@@ -2587,12 +2587,15 @@
 
     // ctrl-I/tab, command completion, needs to be before switch statement
     if (c == ctrlChar('I') && completionCallback) {
+      // rpn #178: enable autocompletion on void entry
+      #if 0
       if (pos == 0)  // SERVER-4967 -- in earlier versions, you could paste
                      // previous output
         continue;    //  back into the shell ... this output may have leading
                      //  tabs.
       // This hack (i.e. what the old code did) prevents command completion
       //  on an empty line but lets users paste text with leading tabs.
+      #endif
 
       killRing.lastAction = KillRing::actionOther;
       historyRecallMostRecent = false;
```
- install linenoise-ng with cmake commands `mkdir build && cd build && cmake .. && make install`

## generate rpn

- clone [rpn project](https://github.com/louisrubet/rpn/) or download a zipped version from [the release directory](https://github.com/louisrubet/rpn/releases)
	```
	# git clone https://github.com/louisrubet/rpn.git
	```

- make
	
	CMake must be installed on the generation machine
    
	```
	# cd rpn/
	# mkdir build
	# cd build && cmake .. && make
	```

- install
	```
    # cd rpn/build
	# sudo make install
	```

- packages

    To build RPM package you should install CMake 2.6.0 or higher

	```
    # cd rpn/build
	# sudo make package
    [100%] Built target rpn
    Run CPack packaging tool...
    CPack: Create package using DEB
    (...)
    CPack: Create package using RPM
    (...)
    CPack: Create package using TGZ
    (...)
    ```