/gcc

2011-10-14  Paolo Carlini  <paolo.carlini@oracle.com>

	PR c++/17212
	* c-family/c.opt ([Wformat-zero-length]): Add C++ and Objective-C++.
	* doc/invoke.texi: Update.

/testsuite
2011-10-14  Paolo Carlini  <paolo.carlini@oracle.com>

	PR c++/17212
	* g++.dg/warn/format6.C: New.
	* obj-c++.dg/warn6.mm: Likewise.

git-svn-id: svn+ssh://gcc.gnu.org/svn/gcc/trunk@179963 138bc75d-0d04-0410-961f-82ee72b054a4

diff --git a/gcc/c-family/c.opt b/gcc/c-family/c.opt
index 79287c4..a1b25ba 100644 (file)
--- a/gcc/c-family/c.opt
+++ b/gcc/c-family/c.opt
@@ -396,7 +396,7 @@ C ObjC C++ ObjC++ Var(warn_format_y2k) Warning
 Warn about strftime formats yielding 2-digit years
 
 Wformat-zero-length
-C ObjC Var(warn_format_zero_length) Warning
+C ObjC C++ ObjC++ Var(warn_format_zero_length) Warning
 Warn about zero-length formats
 
 Wformat=

diff --git a/gcc/doc/invoke.texi b/gcc/doc/invoke.texi
index 4df10ab..dcdae47 100644 (file)
--- a/gcc/doc/invoke.texi
+++ b/gcc/doc/invoke.texi
@@ -3190,7 +3190,7 @@ in the case of @code{scanf} formats, this option will suppress the
 warning if the unused arguments are all pointers, since the Single
 Unix Specification says that such unused arguments are allowed.
 
-@item -Wno-format-zero-length @r{(C and Objective-C only)}
+@item -Wno-format-zero-length @r{(C, C++, Objective-C and Objective-C++ only)}
 @opindex Wno-format-zero-length
 @opindex Wformat-zero-length
 If @option{-Wformat} is specified, do not warn about zero-length formats.

diff --git a/gcc/testsuite/g++.dg/warn/format6.C b/gcc/testsuite/g++.dg/warn/format6.C
new file mode 100644 (file)
index 0000000..a74f802
--- /dev/null
+++ b/gcc/testsuite/g++.dg/warn/format6.C
@@ -0,0 +1,7 @@
+// PR c++/17212
+// { dg-options "-Wformat -Wno-format-zero-length" }
+
+void f()
+{
+  __builtin_printf("");
+}

diff --git a/gcc/testsuite/obj-c++.dg/warn6.mm b/gcc/testsuite/obj-c++.dg/warn6.mm
new file mode 100644 (file)
index 0000000..a74f802
--- /dev/null
+++ b/gcc/testsuite/obj-c++.dg/warn6.mm
@@ -0,0 +1,7 @@
+// PR c++/17212
+// { dg-options "-Wformat -Wno-format-zero-length" }
+
+void f()
+{
+  __builtin_printf("");
+}