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commit d6a58bd81d07322ff5da8f419d8620ef037b6a36
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Author: Siddhesh Poyarekar <siddhesh@sourceware.org>
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Date: Wed Jan 12 18:46:28 2022 +0530
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Enable _FORTIFY_SOURCE=3 for gcc 12 and above
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gcc 12 now has support for the __builtin_dynamic_object_size builtin.
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Adapt the macro checks to enable _FORTIFY_SOURCE=3 on gcc 12 and above.
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Signed-off-by: Siddhesh Poyarekar <siddhesh@sourceware.org>
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Reviewed-by: Adhemerval Zanella <adhemerval.zanella@linaro.org>
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(cherry picked from commit 86bf0feb0e3ec8e37872f72499d6ae33406561d7)
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diff --git a/include/features.h b/include/features.h
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index d974eabfafc24ffb..933499bcff8f1449 100644
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--- a/include/features.h
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+++ b/include/features.h
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@@ -412,7 +412,9 @@
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# warning _FORTIFY_SOURCE requires compiling with optimization (-O)
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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 > 2 && __glibc_clang_prereq (9, 0)
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+# elif _FORTIFY_SOURCE > 2 && (__glibc_clang_prereq (9, 0) \
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+ || __GNUC_PREREQ (12, 0))
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+
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# if _FORTIFY_SOURCE > 3
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# warning _FORTIFY_SOURCE > 3 is treated like 3 on this platform
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# endif
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diff --git a/misc/sys/cdefs.h b/misc/sys/cdefs.h
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index 3bb9f38916e30295..515fb681a0547217 100644
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--- a/misc/sys/cdefs.h
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+++ b/misc/sys/cdefs.h
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@@ -142,7 +142,8 @@
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#define __bos0(ptr) __builtin_object_size (ptr, 0)
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/* Use __builtin_dynamic_object_size at _FORTIFY_SOURCE=3 when available. */
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-#if __USE_FORTIFY_LEVEL == 3 && __glibc_clang_prereq (9, 0)
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+#if __USE_FORTIFY_LEVEL == 3 && (__glibc_clang_prereq (9, 0) \
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+ || __GNUC_PREREQ (12, 0))
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# define __glibc_objsize0(__o) __builtin_dynamic_object_size (__o, 0)
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# define __glibc_objsize(__o) __builtin_dynamic_object_size (__o, 1)
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#else
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