Clifford Wolf:

misc/archive/fix_missing_cxx_incl.pl

@@ -0,0 +1,64 @@
+#!/usr/bin/perl -w
+#
+# Newer gcc versions come with c++ headers that do not include that many
+# standard c headers. So many packages need a lot of additional #include
+# statements to compile. This script helps automating the effort of fixing
+# such packages by detecting the most common cases and adding the missing
+# #include statements.
+#
+# Usage example:
+# find -name '*.cpp' -o -name '*.cc' | xargs perl fix_missing_cxx_incl.pl
+
+use strict;
+use English;
+
+foreach my $file (@ARGV)
+{
+	my @lines = ( );
+	my %inc_found = ( );
+	my %inc_needs = ( );
+
+	open(F, "<$file") || die $!;
+	while (<F>) {
+		push @lines, $_;
+		$inc_found{$1} = 1 if /^ *#\s*include\s*<(.*?)>/;
+		$inc_needs{"string.h"} = 1 if /str(len|n?cpy|n?(case)?cmp|sep|r?chr)/;
+		$inc_needs{"string.h"} = 1 if /mem(set|cpy|r?chr)/;
+		$inc_needs{"stdlib.h"} = 1 if /atoi/;
+	}
+	close(F);
+
+	my $found_missing_inc = 0;
+	foreach my $i (keys %inc_needs) {
+		next if exists $inc_found{$i};
+		$found_missing_inc = 1;
+	}
+
+	next unless $found_missing_inc;
+
+	if (! -f "$file.orig") {
+		open(F, ">$file.orig") || die $!;
+		foreach (@lines) {
+			print F $_;
+		}
+		close(F);
+	}
+
+	open(F, ">$file") || die $!;
+	my $did_inc_dump = 0;
+	my $in_comment = 0;
+	foreach (@lines) {
+		$in_comment = 1 if /^\s*\/\*/;
+		if (!$did_inc_dump && !$in_comment && /^\s*([^#\s]|#\s*if)/ && !/^\s*\/\//) {
+			foreach my $i (keys %inc_needs) {
+				next if exists $inc_found{$i};
+				print F "#include <$i>\n";
+			}
+			$did_inc_dump = 1;
+		}
+		$in_comment = 0 if /\*\//;
+		print F $_;
+	}
+	close(F);
+}
+