devel/hp48xgcc: unbreak the port's build against Clang 15

- Implement variadic function fatal() using <stdarg.h> API
- While here, respect the user's preferred compiler ${CC}

Obtained from:	gcc-2.95.2.1
Reported by:	pkg-fallout

devel/hp48xgcc/Makefile

@@ -37,6 +37,8 @@ post-extract: .SILENT
 	${TAR} xzf ${_DISTDIR}/gcc-${GCC_VER}.tar.gz -C ${WRKDIR}
 # Patch GCC a bit
 	${PATCH} -d ${GCC_DIR} -s < ${WRKSRC}/gcc-target/patches-${GCC_VER}
+# Respect user's preferred compiler
+	${REINPLACE_CMD} -e 's,CC = cc,CC = ${CC},' ${GCC_DIR}/Makefile.in
 # Prepare GCC by creating proper config symlink
 	${LN} -sf ../../saturn/gcc-target/config-saturn ${GCC_DIR}/config/saturn
 # Allow GCC to build in our environment

devel/hp48xgcc/files/patch-gcc-genattr.c

@@ -0,0 +1,38 @@
+--- ../gcc-2.7.2/genattr.c.orig	1995-06-15 11:38:53 UTC
++++ ../gcc-2.7.2/genattr.c
+@@ -20,6 +20,7 @@ the Free Software Foundation, 59 Temple Place - Suite 
+ Boston, MA 02111-1307, USA.  */
+ 
+ 
++#include <stdarg.h>
+ #include <stdio.h>
+ #include "hconfig.h"
+ #include "rtl.h"
+@@ -35,7 +36,7 @@ extern void free PROTO((void *));
+ extern rtx read_rtx PROTO((FILE *));
+ 
+ char *xmalloc PROTO((unsigned));
+-static void fatal ();
++static void fatal PVPROTO ((const char *, ...));
+ void fancy_abort PROTO((void));
+ 
+ /* A range of values.  */
+@@ -214,11 +215,15 @@ xrealloc (ptr, size)
+ }
+ 
+ static void
+-fatal (s, a1, a2)
+-     char *s;
++fatal VPROTO ((const char *format, ...))
+ {
++  va_list ap;
++
++  VA_START (ap, format);
++
+   fprintf (stderr, "genattr: ");
+-  fprintf (stderr, s, a1, a2);
++  vfprintf (stderr, format, ap);
++  va_end (ap);
+   fprintf (stderr, "\n");
+   exit (FATAL_EXIT_CODE);
+ }