rubyPackages.hpricot: fix build with clang 16

    buildInputs = lib.optionals stdenv.isDarwin [ CoreServices ];

  };

  hpricot = attrs: {

    dontBuild = false;

    patches = [

      # Fix incompatible function pointer conversion errors with clang 16

      ./hpricot-fix-incompatible-function-pointer-conversion.patch

    ];

  };

  iconv = attrs: {

    dontBuild = false;

    buildFlags = lib.optional stdenv.isDarwin "--with-iconv-dir=${libiconv}";

diff --git a/ext/fast_xs/fast_xs.c b/ext/fast_xs/fast_xs.c

index 11ef71f..d5eb8d8 100644

--- a/ext/fast_xs/fast_xs.c

+++ b/ext/fast_xs/fast_xs.c

@@ -144,7 +144,7 @@ static VALUE unpack_utf8(VALUE self)

 	return rb_funcall(self, unpack_id, 1, U_fmt);

 }

-static VALUE unpack_uchar(VALUE self)

+static VALUE unpack_uchar(VALUE self, VALUE _exn)

 {

 	return rb_funcall(self, unpack_id, 1, C_fmt);

 }

diff --git a/ext/hpricot_scan/hpricot_scan.c b/ext/hpricot_scan/hpricot_scan.c

index f11cbb5..161ebd4 100644

--- a/ext/hpricot_scan/hpricot_scan.c

+++ b/ext/hpricot_scan/hpricot_scan.c

@@ -22,7 +22,7 @@ struct hpricot_struct {

 #define RSTRING_PTR(str) RSTRING(str)->ptr

 #endif

-VALUE hpricot_css(VALUE, VALUE, VALUE, VALUE, VALUE);

+VALUE hpricot_css(VALUE, VALUE, VALUE, VALUE);

 #define NO_WAY_SERIOUSLY "*** This should not happen, please file a bug report with the HTML you're parsing at http://github.com/hpricot/hpricot/issues.  So sorry!"

diff --git a/ext/hpricot_scan/hpricot_scan.rl b/ext/hpricot_scan/hpricot_scan.rl

index 0f17f11..8b00a38 100644

--- a/ext/hpricot_scan/hpricot_scan.rl

+++ b/ext/hpricot_scan/hpricot_scan.rl

@@ -20,7 +20,7 @@ struct hpricot_struct {

 #define RSTRING_PTR(str) RSTRING(str)->ptr

 #endif

-VALUE hpricot_css(VALUE, VALUE, VALUE, VALUE, VALUE);

+VALUE hpricot_css(VALUE, VALUE, VALUE, VALUE);

 #define NO_WAY_SERIOUSLY "*** This should not happen, please file a bug report with the HTML you're parsing at http://github.com/hpricot/hpricot/issues.  So sorry!"

@@ -806,7 +806,7 @@ make_hpricot_struct(VALUE members, VALUE (*alloc)(VALUE klass))

   for (i = 0; i < len; i++) {

     ID id = SYM2ID(rb_ary_entry(members, i));

     const char* name = rb_id2name(id);

-    int len = strlen(name);

+    size_t len = strlen(name);

     memcpy(attr_set, name, strlen(name));

     attr_set[len] = '=';