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https://gitlab.alpinelinux.org/alpine/aports.git
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50 lines
1.7 KiB
Diff
50 lines
1.7 KiB
Diff
Enable -Wformat and -Wformat-security by default.
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--- a/gcc/c-family/c-common.c
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+++ b/gcc/c-family/c-common.c
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@@ -201,7 +201,7 @@ int warn_unknown_pragmas; /* Tri state variable. */
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/* Warn about format/argument anomalies in calls to formatted I/O functions
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(*printf, *scanf, strftime, strfmon, etc.). */
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-int warn_format;
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+int warn_format = 1;
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/* C/ObjC language option variables. */
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--- a/gcc/c-family/c.opt
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+++ b/gcc/c-family/c.opt
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@@ -384,7 +384,7 @@ C ObjC C++ ObjC++ Var(warn_format_contains_nul) Warning
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Warn about format strings that contain NUL bytes
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Wformat-security
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-C ObjC C++ ObjC++ Var(warn_format_security) Warning
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+C ObjC C++ ObjC++ Var(warn_format_security) Init(1) Warning
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Warn about possible security problems with format functions
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Wformat-y2k
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--- a/gcc/doc/invoke.texi
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+++ b/gcc/doc/invoke.texi
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@@ -3111,6 +3111,9 @@ aspects of format checking, the options @option{-Wformat-y2k},
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@option{-Wformat-nonliteral}, @option{-Wformat-security}, and
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@option{-Wformat=2} are available, but are not included in @option{-Wall}.
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+In Gentoo this option is enabled by default for C, C++, ObjC, ObjC++.
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+To disable, use @option{-Wformat=0}.
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+
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@item -Wformat-y2k
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@opindex Wformat-y2k
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@opindex Wno-format-y2k
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@@ -3164,6 +3167,11 @@ currently a subset of what @option{-Wformat-nonliteral} warns about, but
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in future warnings may be added to @option{-Wformat-security} that are not
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included in @option{-Wformat-nonliteral}.)
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+In Gentoo this option is enabled by default for C, C++, ObjC, ObjC++.
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+To disable, use @option{-Wno-format-security}, or disable all format warnings
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+with @option{-Wformat=0}. To make format security warnings fatal, specify
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+@option{-Werror=format-security}.
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+
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@item -Wformat=2
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@opindex Wformat=2
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@opindex Wno-format=2
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