ploticus: fix zlib file handle type

pkgs/by-name/pl/ploticus/fix-zlib-file-type.patch

···
+Index: src/svg.c
+===================================================================
+--- a/src/svg.c
++++ b/src/svg.c
+@@ -676,9 +676,9 @@
+ double x1, y1, x2, y2;
+ {
+ char *buf;
+ #ifdef WZ
+-  FILE *outfp;
++  gzFile outfp;
+ #endif
+ 
+ if (svg_style_in_prog) fprintf( svg_fp, "</g>");
+ fprintf( svg_fp, "</g>\n" );   /* close default style */
+@@ -731,10 +731,10 @@
+ 	svg_fp = fopen( svg_tmpfilename, "r" );
+ 	if( svg_fp == NULL ) return( Eerr( 2487, "cannot reopen temp file", svg_tmpfilename ) );
+ #ifdef WZ
+ 	if( svg_compress ) {
+-		if( svg_stdout ) outfp = (FILE *) gzdopen( 1, svg_compressmode );  /* stdout = 1 */
+-		else outfp = (FILE *) gzopen( svg_filename, svg_compressmode );
++		if( svg_stdout ) outfp = gzdopen( 1, svg_compressmode );  /* stdout = 1 */
++		else outfp = gzopen( svg_filename, svg_compressmode );
+ 		if( outfp == NULL ) return( Eerr( 2488, "cannot open output file", svg_filename ) );
+ 		} 
+ #endif
+ 	buf = svg_style; /* reuse */

pkgs/by-name/pl/ploticus/package.nix

···
     url = "mirror://sourceforge/ploticus/ploticus/${finalAttrs.version}/ploticus${
       lib.replaceStrings [ "." ] [ "" ] finalAttrs.version
     }_src.tar.gz";
-    sha256 = "PynkufQFIDqT7+yQDlgW2eG0OBghiB4kHAjKt91m4LA=";
+    hash = "sha256-PynkufQFIDqT7+yQDlgW2eG0OBghiB4kHAjKt91m4LA=";
   };
 
   patches = [
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     # This is required for non-ASCII fonts to work:
     # https://ploticus.sourceforge.net/doc/fonts.html
     ./use-gd-package.patch
+
+    # svg.c:752:26: error: passing argument 1 of 'gzclose' from incompatible pointer type []
+    #  752 |                 gzclose( outfp );
+    # note: expected 'gzFile' {aka 'struct gzFile_s *'} but argument is of type 'FILE *'
+    ./fix-zlib-file-type.patch
   ];
 
   buildInputs = [
···
   '';
 
   makeFlags = [ "CC:=$(CC)" ];
+
+  enableParallelBuilding = true;
 
   preInstall = ''
     mkdir -p "$out/bin"
···
         '';
   };
 
-  meta = with lib; {
+  meta = {
     description = "Non-interactive software package for producing plots and charts";
     longDescription = ''
       Ploticus is a free, GPL'd, non-interactive
···
       statistical capabilities.  It allows significant user control
       over colors, styles, options and details.
     '';
-    license = licenses.gpl2Plus;
-    maintainers = with maintainers; [ pSub ];
+    license = lib.licenses.gpl2Plus;
+    maintainers = with lib.maintainers; [ pSub ];
     homepage = "https://ploticus.sourceforge.net/";
-    platforms = with platforms; linux ++ darwin;
+    platforms = with lib.platforms; linux ++ darwin;
   };
 })