FindGnuplot

此模組會尋找 gnuplot

完成後,將會定義

GNUPLOT_FOUND - system has Gnuplot
GNUPLOT_EXECUTABLE - the Gnuplot executable
GNUPLOT_VERSION_STRING - the version of Gnuplot found (since CMake 2.8.8)

GNUPLOT_VERSION_STRING 對於像是 3.7.1 的舊版本將無法運作。