How to build a dynamically loaded library from this source ---------------------------------------------------------- Source files are included here for two plugin libraries. demo_plugin.c provides three toy functions just for the purpose of running the unit test / demo "plugin.dem". uigamma_plugin.c provides an implementation of the regularized upper incomplete gamma function Q(a,x) [NIST DLMF eq. 8.2.4]. This code is already built in to gnuplot version 5.5 and later, but may be useful to provide this function as a plugin for earlier gnuplot versions. If you are configuring and building gnuplot from the top level of the source tree then autoconf/automake will create a Makefile for you and "make" should be sufficient to build the demo plugin. If you are building _only_ this plugin demo, under linux a minimal build command is gcc -shared -lm -o demo_plugin.so demo_plugin.c Under Windows + mingw it is gcc -shared -lm -o newprogram.dll newprogram.c An equivalent build command should work for the uigamma plugin or one you have created yourself. gcc -shared -lm -o uigamma_plugin.so uigamma_plugin.c Type "help import" in a gnuplot session for examples of how to load a function from a plugin library. The suggested sequence of commands for uigamma is gnuplot> import Q(a,x) from "uigamma_plugin" gnuplot> uigamma(a,x) = ((x<1 || x<a) ? 1.0-igamma(a,x) : Q(a,x)) - Ethan
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