Wherever possible, Modelica.Utilities routines are used to
handle file / system commands. The current exception is the use of
'gcc' to compile the libgsl_integration_MI.so /
libgsl_integration_MI.dll library. This is standard on any Linux
system and is available for any Windows system via 'mingw'.
Alternatively, one could edit integrand.c directly and then
compile "by hand" in a command window:
gcc -fPIC -c integrand.c integration_mi.c
gcc -shared integration.o integration_mi.o -o
libgsl_integration_MI.so [.dll for windows]