1 files changed, 43 insertions, 0 deletions
diff --git a/system/gcc/011_all_default-warn-format-security.patch b/system/gcc/011_all_default-warn-format-security.patch
new file mode 100644
index 000000000..a58383a8e
--- /dev/null
+++ b/system/gcc/011_all_default-warn-format-security.patch
@@ -0,0 +1,43 @@
+Enable -Wformat and -Wformat-security by default.
+
+
+--- a/gcc/c-family/c.opt
++++ b/gcc/c-family/c.opt
+@@ -412,7 +412,7 @@ 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
+@@ -424,7 +424,7 @@ 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/gcc.info
++++ b/gcc/doc/gcc.info
+@@ -3451,6 +3451,8 @@ compiler warns that an unrecognized option is present.
+           '-Wno-format-contains-nul', '-Wno-format-extra-args', and
+           '-Wno-format-zero-length'.  '-Wformat' is enabled by '-Wall'.
+ 
++          This option is enabled by default in Alpine Linux.
++
+      '-Wno-format-contains-nul'
+           If '-Wformat' is specified, do not warn about format strings
+           that contain NUL bytes.
+@@ -3496,6 +3498,8 @@ compiler warns that an unrecognized option is present.
+           future warnings may be added to '-Wformat-security' that are
+           not included in '-Wformat-nonliteral'.)
+ 
++          This option is enabled by default in Alpine Linux.
++
+      '-Wformat-y2k'
+           If '-Wformat' is specified, also warn about 'strftime' formats
+           that may yield only a two-digit year.