28 lines
936 B
Diff
28 lines
936 B
Diff
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commit 2a08b6e8331a611dc29325bfa6e29fecc9a3a46e
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Author: Siddhesh Poyarekar <siddhesh@sourceware.org>
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Date: Thu Dec 10 16:47:02 2020 +0530
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Warn on unsupported fortification levels
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Make the _FORTIFY_SOURCE macro soup in features.h warn about
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unsupported fortification levels. For example, it will warn about
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_FORTIFY_SOURCE=3 and over with an indication of which level has been
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selected.
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Co-authored-by: Paul Eggert <eggert@cs.ucla.edu>
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diff --git a/include/features.h b/include/features.h
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index 5bed0a499605a3a2..ea7673ee115bcf0a 100644
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--- a/include/features.h
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+++ b/include/features.h
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@@ -382,6 +382,9 @@
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# elif !__GNUC_PREREQ (4, 1)
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# warning _FORTIFY_SOURCE requires GCC 4.1 or later
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# elif _FORTIFY_SOURCE > 1
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+# if _FORTIFY_SOURCE > 2
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+# warning _FORTIFY_SOURCE > 2 is treated like 2 on this platform
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+# endif
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# define __USE_FORTIFY_LEVEL 2
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# else
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# define __USE_FORTIFY_LEVEL 1
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