xcircuit: fix build with gcc 14

From 323c4c437b0eb027ac5acbd2d0c5b6d62a38befb Mon Sep 17 00:00:00 2001

From: Florian Weimer <fweimer@redhat.com>

Date: Tue, 11 Apr 2023 09:03:09 +0200

Subject: [PATCH] Declare UDrawXAt in prototypes.h

This avoids an implicit function declaration in functions.c for

HAVE_CAIRO.  Future compilers will not accept such implicit function

declarations by default, leading to a build failure.

---

 prototypes.h | 1 +

 1 file changed, 1 insertion(+)

diff --git a/prototypes.h b/prototypes.h

index d577c854c48eddf1b9d086294930c714d69b7af5..5ec4b272722fd658253b70a3fe211c65881075a5 100644

--- a/prototypes.h

+++ b/prototypes.h

@@ -431,6 +431,7 @@ extern void UDrawSimpleLine(XPoint *, XPoint *);

 extern void UDrawLine(XPoint *, XPoint *);

 extern void UDrawCircle(XPoint *, u_char);

 extern void UDrawX(labelptr);

+extern void UDrawXAt(XPoint *);

 extern void UDrawXDown(labelptr);

 extern int  toplevelwidth(objinstptr, short *);

 extern int  toplevelheight(objinstptr, short *);

    "--with-ngspice=${lib.getBin ngspice}/bin/ngspice"

  ];

  patches = [

    # fix compilation with GCC 14

    ./declare-missing-prototype.patch

  ];

  buildInputs = with xorg; [

    cairo

    ghostscript