Merge pull request #253947 from reckenrode/plotutils-fix

diff -ur a/pic2plot/gram.cc b/pic2plot/gram.cc

--- a/pic2plot/gram.cc	2000-06-28 00:23:21.000000000 -0400

+++ b/pic2plot/gram.cc	2023-09-07 22:59:47.004460065 -0400

@@ -1229,9 +1229,9 @@

      char *from;

      unsigned int count;

 {

-  register char *f = from;

-  register char *t = to;

-  register int i = count;

+  char *f = from;

+  char *t = to;

+  int i = count;

   while (i-- > 0)

     *t++ = *f++;

@@ -1244,9 +1244,9 @@

 static void

 __yy_memcpy (char *to, char *from, unsigned int count)

 {

-  register char *t = to;

-  register char *f = from;

-  register int i = count;

+  char *t = to;

+  char *f = from;

+  int i = count;

   while (i-- > 0)

     *t++ = *f++;

@@ -1289,10 +1289,10 @@

 yyparse(YYPARSE_PARAM_ARG)

      YYPARSE_PARAM_DECL

 {

-  register int yystate;

-  register int yyn;

-  register short *yyssp;

-  register YYSTYPE *yyvsp;

+  int yystate;

+  int yyn;

+  short *yyssp;

+  YYSTYPE *yyvsp;

   int yyerrstatus;	/*  number of tokens to shift before error messages enabled */

   int yychar1 = 0;		/*  lookahead token as an internal (translated) token number */

  nativeBuildInputs = [ autoreconfHook ];

  buildInputs = [ libpng ];

  patches = map fetchurl (import ./debian-patches.nix);

  patches = map fetchurl (import ./debian-patches.nix)

    # `pic2plot/gram.cc` uses the register storage class specifier, which is not supported in C++17.

    # This prevents clang 16 from building plotutils because it defaults to C++17.

    ++ [ ./c++17-register-usage-fix.patch ];

  preBuild = ''

    # Fix parallel building.