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15 lines
627 B
Diff
15 lines
627 B
Diff
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diff --git a/gcc/c-family/c-cppbuiltin.c b/gcc/c-family/c-cppbuiltin.c
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index 3fc4fa9..2c502be 100644
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--- a/gcc/c-family/c-cppbuiltin.c
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+++ b/gcc/c-family/c-cppbuiltin.c
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@@ -1342,6 +1342,9 @@ c_cpp_builtins (cpp_reader *pfile)
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builtin_define_with_value ("__REGISTER_PREFIX__", REGISTER_PREFIX, 0);
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builtin_define_with_value ("__USER_LABEL_PREFIX__", user_label_prefix, 0);
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+ /* Fortify Source enabled by default w/optimization. */
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+ cpp_define (pfile, "_FORTIFY_SOURCE=((defined __OPTIMIZE__ && __OPTIMIZE__ > 0) ? 2 : 0)");
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+
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/* Misc. */
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if (flag_gnu89_inline)
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cpp_define (pfile, "__GNUC_GNU_INLINE__");
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