[PATCH] Add ignore f/m group flags for compatibility

[Reid Kleckner]

lgtm if you don't ignore -malign-double.

Sorry, I just did a search for unread reviews.

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Comment at: include/clang/Driver/Options.td:1041
@@ +1040,3 @@
+def malign_jumps_EQ : Joined<["-"], "malign-jumps=">, Group<clang_ignored_m_Group>;
+def malign_double : Flag<["-"], "malign-double">, Group<clang_ignored_m_Group>;
+def mfancy_math_387 : Flag<["-"], "mfancy-math-387">, Group<clang_ignored_m_Group>;
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-malign-double is an ABI breaking flag, as it affects record layout.  We should reject it with prejudice.  :)

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Comment at: include/clang/Driver/Options.td:1628
@@ -1619,2 +1627,3 @@
 defm float_store : BooleanFFlag<"float-store">, Group<clang_ignored_gcc_optimization_f_Group>;
+defm friend_injection : BooleanFFlag<"friend-injection">, Group<clang_ignored_f_Group>;
 defm function_attribute_list : BooleanFFlag<"function-attribute-list">, Group<clang_ignored_f_Group>;
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Amusing, we implement this behavior under -fms-compatibility.

http://reviews.llvm.org/D4570