A very basic example showing that Perl can theoretically do this quite easily. I don't know what other comment styles you want removed, however, so I imagine this will need some tweaking.
$_ = join '', <DATA>;
# Remove comments that don't start the line
s/^.+\/\*.*?\*\//-/mg;
# Remove comments spanning multiple lines
s/\/\*(.*?)\*\/.*?\/\*\1\*\///sg;
# Remove ignored characters
s/[{} ]+//g;
map { $c++ if $_; } split /\n/, $_;
print "$c lines of code.";
__DATA__
/* LM-2006-01 */
multi-line
comment
/* LM-2006-01 */
for (i = 0; i < 10; i++) {
int my var; /* LM-2006-01 */
}
/* LM-2006-01 */
another multi-line
comment
/* LM-2006-01 */
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