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[FYI 1/2] Disable -Wformat-nonliteral in parts of printcmd.c


From: Simon Marchi <simon.marchi@ericsson.com>

commit 3322c5d9a1 ("Remove unneeded explicit .o targets") broke the
build with clang, because -Wformat-nonliteral was in fact needed.
This patch fixes the problem by introducing
DIAGNOSTIC_IGNORE_FORMAT_NONLITERAL and using it in printcmd.c.  This
seems preferable to reverting the patch because now the warning
suppression is more targeted.

gdb/ChangeLog
2018-09-05  Simon Marchi  <simon.marchi@ericsson.com>

	* printcmd.c (printf_c_string): Use
	DIAGNOSTIC_IGNORE_FORMAT_NONLITERAL.
	(printf_wide_c_string, printf_pointer, ui_printf): Likewise.

include/ChangeLog
2018-09-05  Simon Marchi  <simon.marchi@ericsson.com>

	* diagnostics.h (DIAGNOSTIC_IGNORE_FORMAT_NONLITERAL): New macro.
---
 gdb/ChangeLog         |  6 ++++++
 gdb/printcmd.c        | 33 +++++++++++++++++++++++++++++++++
 include/ChangeLog     |  4 ++++
 include/diagnostics.h | 12 ++++++++++++
 4 files changed, 55 insertions(+)

diff --git a/gdb/ChangeLog b/gdb/ChangeLog
index 084765d29c..d8ca6d3dab 100644
--- a/gdb/ChangeLog
+++ b/gdb/ChangeLog
@@ -1,3 +1,9 @@
+2018-09-05  Simon Marchi  <simon.marchi@ericsson.com>
+
+	* printcmd.c (printf_c_string): Use
+	DIAGNOSTIC_IGNORE_FORMAT_NONLITERAL.
+	(printf_wide_c_string, printf_pointer, ui_printf): Likewise.
+
 2018-09-05  Tom Tromey  <tom@tromey.com>
 
 	* cli/cli-cmds.c (shell_escape, edit_command): Remove cast.
diff --git a/gdb/printcmd.c b/gdb/printcmd.c
index 1a3d9723d4..8c999188d7 100644
--- a/gdb/printcmd.c
+++ b/gdb/printcmd.c
@@ -2200,7 +2200,10 @@ printf_c_string (struct ui_file *stream, const char *format,
   tem = value_as_address (value);
   if (tem == 0)
     {
+      DIAGNOSTIC_PUSH
+      DIAGNOSTIC_IGNORE_FORMAT_NONLITERAL
       fprintf_filtered (stream, format, "(null)");
+      DIAGNOSTIC_POP
       return;
     }
 
@@ -2221,7 +2224,10 @@ printf_c_string (struct ui_file *stream, const char *format,
     read_memory (tem, str, j);
   str[j] = 0;
 
+  DIAGNOSTIC_PUSH
+  DIAGNOSTIC_IGNORE_FORMAT_NONLITERAL
   fprintf_filtered (stream, format, (char *) str);
+  DIAGNOSTIC_POP
 }
 
 /* Subroutine of ui_printf to simplify it.
@@ -2245,7 +2251,10 @@ printf_wide_c_string (struct ui_file *stream, const char *format,
   tem = value_as_address (value);
   if (tem == 0)
     {
+      DIAGNOSTIC_PUSH
+      DIAGNOSTIC_IGNORE_FORMAT_NONLITERAL
       fprintf_filtered (stream, format, "(null)");
+      DIAGNOSTIC_POP
       return;
     }
 
@@ -2272,7 +2281,10 @@ printf_wide_c_string (struct ui_file *stream, const char *format,
 			     &output, translit_char);
   obstack_grow_str0 (&output, "");
 
+  DIAGNOSTIC_PUSH
+  DIAGNOSTIC_IGNORE_FORMAT_NONLITERAL
   fprintf_filtered (stream, format, obstack_base (&output));
+  DIAGNOSTIC_POP
 }
 
 /* Subroutine of ui_printf to simplify it.
@@ -2400,13 +2412,19 @@ printf_pointer (struct ui_file *stream, const char *format,
       *fmt_p++ = 'l';
       *fmt_p++ = 'x';
       *fmt_p++ = '\0';
+      DIAGNOSTIC_PUSH
+      DIAGNOSTIC_IGNORE_FORMAT_NONLITERAL
       fprintf_filtered (stream, fmt, val);
+      DIAGNOSTIC_POP
     }
   else
     {
       *fmt_p++ = 's';
       *fmt_p++ = '\0';
+      DIAGNOSTIC_PUSH
+      DIAGNOSTIC_IGNORE_FORMAT_NONLITERAL
       fprintf_filtered (stream, fmt, "(nil)");
+      DIAGNOSTIC_POP
     }
 }
 
@@ -2507,8 +2525,11 @@ ui_printf (const char *arg, struct ui_file *stream)
 					 &output, translit_char);
 	      obstack_grow_str0 (&output, "");
 
+	      DIAGNOSTIC_PUSH
+	      DIAGNOSTIC_IGNORE_FORMAT_NONLITERAL
 	      fprintf_filtered (stream, current_substring,
                                 obstack_base (&output));
+	      DIAGNOSTIC_POP
 	    }
 	    break;
 	  case long_long_arg:
@@ -2516,7 +2537,10 @@ ui_printf (const char *arg, struct ui_file *stream)
 	    {
 	      long long val = value_as_long (val_args[i]);
 
+	      DIAGNOSTIC_PUSH
+	      DIAGNOSTIC_IGNORE_FORMAT_NONLITERAL
               fprintf_filtered (stream, current_substring, val);
+	      DIAGNOSTIC_POP
 	      break;
 	    }
 #else
@@ -2526,14 +2550,20 @@ ui_printf (const char *arg, struct ui_file *stream)
 	    {
 	      int val = value_as_long (val_args[i]);
 
+	      DIAGNOSTIC_PUSH
+	      DIAGNOSTIC_IGNORE_FORMAT_NONLITERAL
               fprintf_filtered (stream, current_substring, val);
+	      DIAGNOSTIC_POP
 	      break;
 	    }
 	  case long_arg:
 	    {
 	      long val = value_as_long (val_args[i]);
 
+	      DIAGNOSTIC_PUSH
+	      DIAGNOSTIC_IGNORE_FORMAT_NONLITERAL
               fprintf_filtered (stream, current_substring, val);
+	      DIAGNOSTIC_POP
 	      break;
 	    }
 	  /* Handles floating-point values.  */
@@ -2557,7 +2587,10 @@ ui_printf (const char *arg, struct ui_file *stream)
 	       have modified GCC to include -Wformat-security by
 	       default, which will warn here if there is no
 	       argument.  */
+	    DIAGNOSTIC_PUSH
+	    DIAGNOSTIC_IGNORE_FORMAT_NONLITERAL
 	    fprintf_filtered (stream, current_substring, 0);
+	    DIAGNOSTIC_POP
 	    break;
 	  default:
 	    internal_error (__FILE__, __LINE__,
diff --git a/include/ChangeLog b/include/ChangeLog
index 63fdde6349..c23c743738 100644
--- a/include/ChangeLog
+++ b/include/ChangeLog
@@ -1,3 +1,7 @@
+2018-09-05  Simon Marchi  <simon.marchi@ericsson.com>
+
+	* diagnostics.h (DIAGNOSTIC_IGNORE_FORMAT_NONLITERAL): New macro.
+
 2018-08-31  Alan Modra  <amodra@gmail.com>
 
 	* elf/ppc64.h (R_PPC64_REL16_HIGH, R_PPC64_REL16_HIGHA),
diff --git a/include/diagnostics.h b/include/diagnostics.h
index 9e9d1a832f..79e6779edf 100644
--- a/include/diagnostics.h
+++ b/include/diagnostics.h
@@ -59,6 +59,10 @@
 #  define DIAGNOSTIC_IGNORE_SWITCH_DIFFERENT_ENUM_TYPES \
    DIAGNOSTIC_IGNORE ("-Wenum-compare-switch")
 # endif
+
+# define DIAGNOSTIC_IGNORE_FORMAT_NONLITERAL \
+  DIAGNOSTIC_IGNORE ("-Wformat-nonliteral")
+
 #elif defined (__GNUC__) /* GCC */
 
 # define DIAGNOSTIC_IGNORE_UNUSED_FUNCTION \
@@ -66,6 +70,10 @@
 
 # define DIAGNOSTIC_IGNORE_STRINGOP_TRUNCATION \
   DIAGNOSTIC_IGNORE ("-Wstringop-truncation")
+
+# define DIAGNOSTIC_IGNORE_FORMAT_NONLITERAL \
+  DIAGNOSTIC_IGNORE ("-Wformat-nonliteral")
+
 #endif
 
 #ifndef DIAGNOSTIC_IGNORE_SELF_MOVE
@@ -92,4 +100,8 @@
 # define DIAGNOSTIC_IGNORE_STRINGOP_TRUNCATION
 #endif
 
+#ifndef DIAGNOSTIC_IGNORE_FORMAT_NONLITERAL
+# define DIAGNOSTIC_IGNORE_FORMAT_NONLITERAL
+#endif
+
 #endif /* DIAGNOSTICS_H */
-- 
2.17.1


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