It seems to be a bug in Module::ScanDeps (pp depends on it), as it doesn't recognize the unorthodox use POSIX":sys_wait_h"; (it does recognize use POSIX ":sys_wait_h"; or use POSIX(":sys_wait_h"); 
scandeps -B program.pl

pp -o program.exe program.pl 

pp -MPOSIX -MModule::Name ... -o program.exe program.pl

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In reply to Re: Problem with POSIX.pm module using pp by Anonymous Monk
in thread Problem with POSIX.pm module using pp by athanasia

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