Reference/LogSet
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LogSet
on|off
Sets whether install logging to install.log will happen. $INSTDIR must have a value before you call this function or it will not work. Note that the NSIS_CONFIG_LOG build setting must be set (scons NSIS_CONFIG_LOG=yes) on compile time (it is not by default) to support this.
See Building NSIS for more information about recompiling NSIS.
Command introduced with NSIS v1.98
