https://bugs.gentoo.org/943793
--- a/libsprite/data.c
+++ b/libsprite/data.c
@@ -79,9 +79,6 @@ W_Font  W_HighlightFont = (W_Font) & two, W_UnderlineFont = (W_Font) & three;
 W_Color W_White = WHITE, W_Black = BLACK, W_Red = RED, W_Green = GREEN;
 W_Color W_Yellow = YELLOW, W_Cyan = CYAN, W_Grey = LIGHT_GREY, W_DarkGrey = DARK_GREY;
 int     W_Textwidth, W_Textheight, W_BigTextwidth, W_BigTextheight;
-#ifndef strdup
-char   *strdup();
-#endif
 int     W_in_message = 0;	/* jfy -- for Jerry's warp message hack */
 
 #ifdef RJC
--- a/xgal.sndsrv.linux.c
+++ b/xgal.sndsrv.linux.c
@@ -49,7 +49,7 @@ int fragsize;
 
 
 /* Terminate: Signal Handler */
-void quit ()
+void quit (int n)
 {
   exit (0);
 }