16a4241cb7
gcc 4.7 introduced the sync_8 builtin functions for ARM. For ARM < v7, this requires calling into the kernel. However, the failure path of that call reports an error with the __write() function, which is a glibc internal function. Therefore, it fails to link with uClibc or musl. This was fixed in gcc 5.2.0, by replacing the __write() with a plain write(). For sync_8 itself we have solved this with the conditions on BR2_TOOLCHAIN_ARM_HAS_SYNC_8. However, the same function is also used for the implementation of atomics. For the internal toolchain, we can fix this by backporting the patch to 4.9.4 and 4.8.5. Fixes: http://autobuild.buildroot.net/results/1db64b4830f499621e44523e0ef68191505e2ce9 Signed-off-by: Arnout Vandecappelle (Essensium/Mind) <arnout@mind.be> Signed-off-by: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>
44 lines
1.6 KiB
Diff
44 lines
1.6 KiB
Diff
From 80bc14a5249da7054b716229206b453f339b4a5e Mon Sep 17 00:00:00 2001
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From: nsz <nsz@138bc75d-0d04-0410-961f-82ee72b054a4>
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Date: Mon, 23 Nov 2015 15:17:55 +0000
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Subject: [PATCH] [ARM] PR target/68059 libgcc should not use __write for
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printing fatal error
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libgcc/
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PR target/68059
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* config/arm/linux-atomic-64bit.c (__write): Rename to...
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(write): ...this and fix the return type.
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git-svn-id: svn+ssh://gcc.gnu.org/svn/gcc/trunk@230762 138bc75d-0d04-0410-961f-82ee72b054a4
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Signed-off-by: Arnout Vandecappelle (Essensium/Mind) <arnout@mind.be>
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---
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libgcc/config/arm/linux-atomic-64bit.c | 4 ++--
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1 file changed, 2 insertions(+), 2 deletions(-)
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diff --git a/libgcc/config/arm/linux-atomic-64bit.c b/libgcc/config/arm/linux-atomic-64bit.c
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index 5b8c6e2..9078673 100644
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--- a/libgcc/config/arm/linux-atomic-64bit.c
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+++ b/libgcc/config/arm/linux-atomic-64bit.c
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@@ -33,7 +33,7 @@ see the files COPYING3 and COPYING.RUNTIME respectively. If not, see
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kernels; we check for that in an init section and bail out rather
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unceremoneously. */
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-extern unsigned int __write (int fd, const void *buf, unsigned int count);
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+extern int write (int fd, const void *buf, unsigned int count);
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extern void abort (void);
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/* Kernel helper for compare-and-exchange. */
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@@ -56,7 +56,7 @@ static void __check_for_sync8_kernelhelper (void)
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for the user - I'm not sure I can rely on much else being
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available at this point, so do the same as generic-morestack.c
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write () and abort (). */
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- __write (2 /* stderr. */, err, sizeof (err));
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+ write (2 /* stderr. */, err, sizeof (err));
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abort ();
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}
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};
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--
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2.10.2
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