The file msvcrt.lib is a core component of MSVC. Whenever it cannot be found, that means that you did not run the vcvars32.cmd (or vcvars32.bat) command. If you open a new command prompt, likely it is enough to type "%VCToolsInstallDir%\vcvars32" (including the quotes) to start it. If that is not sufficient, you need to locate the file vcvars32 by searching for it, either using the Windows Explorer or by using Perl:

perl -MFile::Find -le "File::Find::find(sub{print $File::Find::name if
+ /vcvars32/i},@ARGV)" C:/
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If you have installed MSVC into any other drive than C:, you need to put it on the command line instead of C:.