From GridLAB-D Wiki
use_msvc - Global flag to force the use of VS2005 instead of mingw
Synopsis
host% gridlabd -D use_msvc=TRUE #set use_msvc=TRUE
Description
Normally, GridLAB-D uses mingw to compile runtime code in the GLM files. However, when debugging modules using VS2005, it can be helpful to debugging if GridLAB-D uses the runtime compiler instead.