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Simulator Variables
Environment Variables
argument of 0 (zero) the tool will not release the licenses after being suspended. You can
change the default length of time (number of seconds) by setting this environment variable to an
integer greater than 0 (zero).
MTI_USELIB_DIR
The MTI_USELIB_DIR environment variable specifies the directory into which object libraries
are compiled when using the -compile_uselibs argument to the vlog command
MTI_VOPT_FLOW
The environment variable MTI_VOPT_FLOW determines whether vopt is used as part of the
vsim command. This variable is overriden by vsim switches -vopt and -novopt, but it overrides
the VoptFlow setting in modelsim.ini.
Setting MTI_VOPT_FLOW to 0 means do not use vopt (-novopt). Setting it to any other value
means use vopt (-vopt).
NOMMAP
When set to 1, the NOMMAP environment variable disables memory mapping in the toolset.
You should only use this variable when running on Linux 7.1 because it will decrease the speed
with which the tool reads files.
PLIOBJS
The toolset uses the PLIOBJS environment variable to search for PLI object files for loading.
The argument consists of a space-separated list of file or path names
STDOUT
The argument to the STDOUT environment variable specifies a filename to which the simulator
saves the VSOUT temp file information. Typically this information is deleted when the
simulator exits. The location for this file is set with the TMPDIR variable, which allows you to
find and delete the file in the event of a crash, because an unnamed VSOUT file is not deleted
after a crash.
TMP
(Windows environments) The TMP environment variable specifies the path to a tempnam()
generated file (VSOUT) containing all stdout from the simulation kernel.
TMPDIR
(UNIX environments) The TMPDIR environment variable specifies the path to a tempnam()
generated file (VSOUT) containing all stdout from the simulation kernel.
ModelSim User’s Manual, v6.3g
May 2008
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