https://sourceforge.net/p/htmlcxx/patches/8/

diff --color -Naur a/html/CharsetConverter.cc b/html/CharsetConverter.cc
--- a/html/CharsetConverter.cc	2018-12-29 03:13:56.000000000 +0000
+++ b/html/CharsetConverter.cc	2021-05-31 23:03:10.705334580 +0100
@@ -7,7 +7,7 @@
 using namespace std;
 using namespace htmlcxx;
 
-CharsetConverter::CharsetConverter(const string &from, const string &to) throw (Exception)
+CharsetConverter::CharsetConverter(const string &from, const string &to)
 {
 	mIconvDescriptor = iconv_open(to.c_str(), from.c_str());
 	if (mIconvDescriptor == (iconv_t)(-1))
diff --color -Naur a/html/CharsetConverter.h b/html/CharsetConverter.h
--- a/html/CharsetConverter.h	2018-12-29 03:13:56.000000000 +0000
+++ b/html/CharsetConverter.h	2021-05-31 23:03:19.042574598 +0100
@@ -17,7 +17,7 @@
 						: std::runtime_error(arg) {}
 			};
 			
-			CharsetConverter(const std::string &from, const std::string &to) throw (Exception);
+			CharsetConverter(const std::string &from, const std::string &to);
 			~CharsetConverter();
 			
 			std::string convert(const std::string &input);