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diff -ruN tools/clang/include/clang/Basic/LangOptions.def tools/clang/include/clang/Basic/LangOptions.def
--- tools/clang/include/clang/Basic/LangOptions.def 2015-07-30 22:47:41 UTC
+++ tools/clang/include/clang/Basic/LangOptions.def
@@ -114,6 +114,7 @@
LANGOPT(RTTIData , 1, 1, "emit run-time type information data")
LANGOPT(MSBitfields , 1, 0, "Microsoft-compatible structure layout")
LANGOPT(Freestanding, 1, 0, "freestanding implementation")
+LANGOPT(FormatExtensions , 1, 0, "FreeBSD format extensions")
LANGOPT(NoBuiltin , 1, 0, "disable builtin functions")
LANGOPT(NoMathBuiltin , 1, 0, "disable math builtin functions")
LANGOPT(GNUAsm , 1, 1, "GNU-style inline assembly")
diff -ruN tools/clang/include/clang/Driver/Options.td tools/clang/include/clang/Driver/Options.td
--- tools/clang/include/clang/Driver/Options.td 2015-07-30 22:47:41 UTC
+++ tools/clang/include/clang/Driver/Options.td
@@ -644,6 +644,8 @@
def ffreestanding : Flag<["-"], "ffreestanding">, Group<f_Group>, Flags<[CC1Option]>,
HelpText<"Assert that the compilation takes place in a freestanding environment">;
+def fformat_extensions: Flag<["-"], "fformat-extensions">, Group<f_Group>, Flags<[CC1Option]>,
+ HelpText<"Enable FreeBSD kernel specific format string extensions">;
def fgnu_keywords : Flag<["-"], "fgnu-keywords">, Group<f_Group>, Flags<[CC1Option]>,
HelpText<"Allow GNU-extension keywords regardless of language standard">;
def fgnu89_inline : Flag<["-"], "fgnu89-inline">, Group<f_Group>, Flags<[CC1Option]>,
--- tools/clang/lib/Driver/ToolChains/Clang.cpp.orig 2017-09-14 19:36:28.212240000 +0100
+++ tools/clang/lib/Driver/ToolChains/Clang.cpp 2017-09-14 19:35:59.296165000 +0100
@@ -3202,6 +3202,7 @@
// Forward -f (flag) options which we can pass directly.
Args.AddLastArg(CmdArgs, options::OPT_femit_all_decls);
+ Args.AddLastArg(CmdArgs, options::OPT_fformat_extensions);
Args.AddLastArg(CmdArgs, options::OPT_fheinous_gnu_extensions);
Args.AddLastArg(CmdArgs, options::OPT_fno_operator_names);
// Emulated TLS is enabled by default on Android and OpenBSD, and can be enabled
diff -ruN tools/clang/lib/Frontend/CompilerInvocation.cpp tools/clang/lib/Frontend/CompilerInvocation.cpp
--- tools/clang/lib/Frontend/CompilerInvocation.cpp 2015-07-30 22:47:41 UTC
+++ tools/clang/lib/Frontend/CompilerInvocation.cpp
@@ -1543,6 +1543,7 @@
Opts.ShortWChar = Args.hasFlag(OPT_fshort_wchar, OPT_fno_short_wchar, false);
Opts.ShortEnums = Args.hasArg(OPT_fshort_enums);
Opts.Freestanding = Args.hasArg(OPT_ffreestanding);
+ Opts.FormatExtensions = Args.hasArg(OPT_fformat_extensions);
Opts.NoBuiltin = Args.hasArg(OPT_fno_builtin) || Opts.Freestanding;
Opts.NoMathBuiltin = Args.hasArg(OPT_fno_math_builtin);
Opts.AssumeSaneOperatorNew = !Args.hasArg(OPT_fno_assume_sane_operator_new);
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