Use the substitution operator s///g like this:
1:30 >perl -wE "my $found = 'ENV{\"VCINSTALLDIR\"}\ATLMFC\LIB\amd64;E
+NV{\"LIBPATH\"}'; $found =~ s/ENV{\"(.*?)\"}/\$ENV(\"$1\")/g; say $fo
+und;"
$ENV("VCINSTALLDIR")\ATLMFC\LIB\amd64;$ENV("LIBPATH")
1:30 >
Within the substitution, the parentheses capture the “value” text which is used in the replacement as $1. The /g modifier tells the regex engine to keep searching and substituting until the string is exhausted.
See perlretut and perlre.
Hope that helps,
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