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From: Siddhesh Poyarekar <siddhesh@sourceware.org> To: glibc-cvs@sourceware.org Subject: [glibc/release/2.34/master] Enable _FORTIFY_SOURCE=3 for gcc 12 and above Date: Fri, 11 Mar 2022 15:12:24 +0000 (GMT) [thread overview] Message-ID: <20220311151224.81FCA3857829@sourceware.org> (raw) https://sourceware.org/git/gitweb.cgi?p=glibc.git;h=d6a58bd81d07322ff5da8f419d8620ef037b6a36 commit d6a58bd81d07322ff5da8f419d8620ef037b6a36 Author: Siddhesh Poyarekar <siddhesh@sourceware.org> Date: Wed Jan 12 18:46:28 2022 +0530 Enable _FORTIFY_SOURCE=3 for gcc 12 and above gcc 12 now has support for the __builtin_dynamic_object_size builtin. Adapt the macro checks to enable _FORTIFY_SOURCE=3 on gcc 12 and above. Signed-off-by: Siddhesh Poyarekar <siddhesh@sourceware.org> Reviewed-by: Adhemerval Zanella <adhemerval.zanella@linaro.org> (cherry picked from commit 86bf0feb0e3ec8e37872f72499d6ae33406561d7) Diff: --- include/features.h | 4 +++- misc/sys/cdefs.h | 3 ++- 2 files changed, 5 insertions(+), 2 deletions(-) diff --git a/include/features.h b/include/features.h index d974eabfaf..933499bcff 100644 --- a/include/features.h +++ b/include/features.h @@ -412,7 +412,9 @@ # warning _FORTIFY_SOURCE requires compiling with optimization (-O) # elif !__GNUC_PREREQ (4, 1) # warning _FORTIFY_SOURCE requires GCC 4.1 or later -# elif _FORTIFY_SOURCE > 2 && __glibc_clang_prereq (9, 0) +# elif _FORTIFY_SOURCE > 2 && (__glibc_clang_prereq (9, 0) \ + || __GNUC_PREREQ (12, 0)) + # if _FORTIFY_SOURCE > 3 # warning _FORTIFY_SOURCE > 3 is treated like 3 on this platform # endif diff --git a/misc/sys/cdefs.h b/misc/sys/cdefs.h index 3bb9f38916..515fb681a0 100644 --- a/misc/sys/cdefs.h +++ b/misc/sys/cdefs.h @@ -142,7 +142,8 @@ #define __bos0(ptr) __builtin_object_size (ptr, 0) /* Use __builtin_dynamic_object_size at _FORTIFY_SOURCE=3 when available. */ -#if __USE_FORTIFY_LEVEL == 3 && __glibc_clang_prereq (9, 0) +#if __USE_FORTIFY_LEVEL == 3 && (__glibc_clang_prereq (9, 0) \ + || __GNUC_PREREQ (12, 0)) # define __glibc_objsize0(__o) __builtin_dynamic_object_size (__o, 0) # define __glibc_objsize(__o) __builtin_dynamic_object_size (__o, 1) #else
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