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Enable -Wformat and -Wformat-security by default.
--- a/gcc/c-family/c.opt
+++ b/gcc/c-family/c.opt
@@ -400,7 +400,7 @@ C ObjC C++ ObjC++ Var(warn_format_nonliteral) Warning LangEnabledBy(C ObjC C++ O
Warn about format strings that are not literals
Wformat-security
-C ObjC C++ ObjC++ Var(warn_format_security) Warning LangEnabledBy(C ObjC C++ ObjC++,Wformat=, warn_format >= 2, 0)
+C ObjC C++ ObjC++ Var(warn_format_security) Init(1) Warning LangEnabledBy(C ObjC C++ ObjC++,Wformat=, warn_format >= 2, 0)
Warn about possible security problems with format functions
Wformat-y2k
@@ -412,7 +412,7 @@ C ObjC C++ ObjC++ Var(warn_format_zero_length) Warning LangEnabledBy(C ObjC C++
Warn about zero-length formats
Wformat=
-C ObjC C++ ObjC++ Joined RejectNegative UInteger Var(warn_format) Warning LangEnabledBy(C ObjC C++ ObjC++,Wall, 1, 0)
+C ObjC C++ ObjC++ Joined RejectNegative UInteger Var(warn_format) Init(1) Warning LangEnabledBy(C ObjC C++ ObjC++,Wall, 1, 0)
Warn about printf/scanf/strftime/strfmon format string anomalies
Wignored-qualifiers
--- a/gcc/doc/invoke.texi
+++ b/gcc/doc/invoke.texi
@@ -3362,6 +3362,11 @@ currently a subset of what @option{-Wformat-nonliteral} warns about, but
in future warnings may be added to @option{-Wformat-security} that are not
included in @option{-Wformat-nonliteral}.)
+In Gentoo this option is enabled by default for C, C++, ObjC, ObjC++.
+To disable, use @option{-Wno-format-security}, or disable all format
+warnings with @option{-Wformat=0}. To make format security warnings
+fatal, specify @option{-Werror=format-security}.
+
@item -Wformat-y2k
@opindex Wformat-y2k
@opindex Wno-format-y2k
|
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