maint: suppress GCC 13 false alarms

* src/csplit.c, src/fmt.c, src/make-prime-list.c, src/nohup.c:
Add pragmas to pacify GCC 13 when coreutils is configured
with --enable-gcc-warnings='expensive'.

src/csplit.c

@@ -382,6 +382,13 @@ record_line_starts (struct buffer_record *b)
   return lines;
 }
 
+/* Work around <https://gcc.gnu.org/bugzilla/show_bug.cgi?id=109614>.  */
+#if 13 <= __GNUC__
+# pragma GCC diagnostic ignored "-Wanalyzer-mismatching-deallocation"
+# pragma GCC diagnostic ignored "-Wanalyzer-use-after-free"
+# pragma GCC diagnostic ignored "-Wanalyzer-use-of-uninitialized-value"
+#endif
+
 static void
 free_buffer (struct buffer_record *buf)
 {

src/fmt.c

@@ -915,6 +915,11 @@ fmt_paragraph (void)
   word_limit->length = saved_length;
 }
 
+/* Work around <https://gcc.gnu.org/bugzilla/show_bug.cgi?id=109628>.  */
+#if 13 <= __GNUC__
+# pragma GCC diagnostic ignored "-Wanalyzer-use-of-uninitialized-value"
+#endif
+
 /* Return the constant component of the cost of breaking before the
    word THIS.  */
 

src/make-prime-list.c

@@ -110,6 +110,11 @@ print_wide_uint (wide_uint n, int nesting, unsigned wide_uint_bits)
   printf ("0x%0*xU", hex_digits_per_literal, remainder);
 }
 
+/* Work around <https://gcc.gnu.org/bugzilla/show_bug.cgi?id=109635>.  */
+#if 13 <= __GNUC__
+# pragma GCC diagnostic ignored "-Wanalyzer-use-of-uninitialized-value"
+#endif
+
 static void
 output_primes (const struct prime *primes, unsigned nprimes)
 {

src/nohup.c

@@ -73,6 +73,11 @@ To save output to FILE, use '%s COMMAND > FILE'.\n"),
   exit (status);
 }
 
+/* GCC 13 gets confused by the dup2 calls.  */
+#if 13 <= __GNUC__
+# pragma GCC diagnostic ignored "-Wanalyzer-fd-leak"
+#endif
+
 int
 main (int argc, char **argv)
 {