initial buildroot for linux 5.15
This commit is contained in:
Huan.Feng
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From 54d8fe7ae40902d6d38e670f4024092f53c14e1f Mon Sep 17 00:00:00 2001
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From: Samuel Martin <s.martin49@gmail.com>
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Date: Sat, 8 Mar 2014 13:19:14 +0100
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Subject: [PATCH] Only blacklist ARM gcc 4.8.0 and 4.8.1
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Since many ARM toolchain providers include the bug fix for PR58854 in
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their latest releases based on gcc-4.8.2, then only blacklist gcc 4.8.0
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and 4.8.1.
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Signed-off-by: Samuel Martin <s.martin49@gmail.com>
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[Fabrice: update for 0.13.0]
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Signed-off-by: Fabrice Fontaine <fontaine.fabrice@gmail.com>
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---
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urcu/compiler.h | 9 ++++++++-
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1 file changed, 8 insertions(+), 1 deletion(-)
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diff --git a/include/urcu/arch/arm.h b/include/urcu/arch/arm.h
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index 1e30903..56115f1 100644
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--- a/include/urcu/arch/arm.h
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+++ b/include/urcu/arch/arm.h
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@@ -118,10 +118,17 @@
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*/
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/*
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+ * Official gcc releases from 4.8.0 to 4.8.2 have the following bug,
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+ * however, many arm toolchain providers have the included the fix for
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+ * their latest 4.8.2 releases.
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+ * So, we only blacklist gcc 4.8.0 and 4.8.1.
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+ * Unfortunately, this bug is not easy to test, so we rely on the
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+ * knowledge of the user on its compiler.
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+ *
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* http://gcc.gnu.org/bugzilla/show_bug.cgi?id=58854
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*/
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#ifdef URCU_GCC_VERSION
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-# if URCU_GCC_VERSION >= 40800 && URCU_GCC_VERSION <= 40802
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+# if URCU_GCC_VERSION >= 40800 && URCU_GCC_VERSION <= 40801
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# error Your gcc version produces clobbered frame accesses
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# endif
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#endif
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--
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1.9.0
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@@ -0,0 +1,41 @@
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From e915ab84fd0c02d37504f3eb1e1f3be93ea6dc37 Mon Sep 17 00:00:00 2001
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From: Michael Jeanson <mjeanson@efficios.com>
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Date: Thu, 9 Sep 2021 12:11:16 -0400
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Subject: [PATCH] fix: don't use C++ thread_local on MacOs
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Recent versions of Apple's clang++ do support 'thread_local' but the
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implementation generates additional helper symbols. This is a problem
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when accessing an extern TLS variable in a C++ compile unit that is
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provided by a C library that doesn't have those extra symbols.
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Fallback to using '__thread' on MacOs.
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Change-Id: I87cb5b3c9293f7bf66f7115f453b546dd793a449
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Signed-off-by: Michael Jeanson <mjeanson@efficios.com>
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Signed-off-by: Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
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[Retrieved from:
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https://github.com/urcu/userspace-rcu/commit/e915ab84fd0c02d37504f3eb1e1f3be93ea6dc37]
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Signed-off-by: Fabrice Fontaine <fontaine.fabrice@gmail.com>
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---
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include/urcu/tls-compat.h | 7 ++++++-
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1 file changed, 6 insertions(+), 1 deletion(-)
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diff --git a/include/urcu/tls-compat.h b/include/urcu/tls-compat.h
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index 24ef1b9a..25cf375a 100644
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--- a/include/urcu/tls-compat.h
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+++ b/include/urcu/tls-compat.h
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@@ -34,7 +34,12 @@ extern "C" {
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#ifdef CONFIG_RCU_TLS
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-#if defined (__cplusplus) && (__cplusplus >= 201103L)
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+/*
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+ * Don't use C++ 'thread_local' on MacOs, the implementation is incompatible
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+ * with C and will result in a link error when accessing an extern variable
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+ * provided by the C library from C++ code.
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+ */
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+#if defined (__cplusplus) && (__cplusplus >= 201103L) && !defined(__APPLE__)
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# define URCU_TLS_STORAGE_CLASS thread_local
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#elif defined (__STDC_VERSION__) && (__STDC_VERSION__ >= 201112L)
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# define URCU_TLS_STORAGE_CLASS _Thread_local
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+53
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From 2e359284497c361e3208501fc70d49b2c54dc4ef Mon Sep 17 00:00:00 2001
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From: Michael Jeanson <mjeanson@efficios.com>
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Date: Tue, 14 Sep 2021 10:41:08 -0400
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Subject: [PATCH] Always use '__thread' for Thread local storage except on MSVC
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Use the GCC extension '__thread' [1] for Thread local storage on all C
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and C++ compilers except MSVC.
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While C11 and C++11 respectively offer '_Thread_local' and
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'thread_local' as potentialy faster implementations, they offer no
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guarantees of compatibility when used in a library interface which might
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be used by both C and C++ client code.
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[1] https://gcc.gnu.org/onlinedocs/gcc/Thread-Local.html
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Change-Id: If4fe8bcdbda24b21dedf382112bd5c5f836c00c8
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Signed-off-by: Michael Jeanson <mjeanson@efficios.com>
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Signed-off-by: Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
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[Retrieved from:
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https://github.com/urcu/userspace-rcu/commit/2e359284497c361e3208501fc70d49b2c54dc4ef]
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Signed-off-by: Fabrice Fontaine <fontaine.fabrice@gmail.com>
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---
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include/urcu/tls-compat.h | 15 +++++++--------
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1 file changed, 7 insertions(+), 8 deletions(-)
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diff --git a/include/urcu/tls-compat.h b/include/urcu/tls-compat.h
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index 25cf375a..a2c94ded 100644
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--- a/include/urcu/tls-compat.h
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+++ b/include/urcu/tls-compat.h
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@@ -35,15 +35,14 @@ extern "C" {
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#ifdef CONFIG_RCU_TLS
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/*
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- * Don't use C++ 'thread_local' on MacOs, the implementation is incompatible
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- * with C and will result in a link error when accessing an extern variable
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- * provided by the C library from C++ code.
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+ * Default to '__thread' on all C and C++ compilers except MSVC. While C11 has
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+ * '_Thread_local' and C++11 has 'thread_local', only '__thread' seems to have
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+ * a compatible implementation when linking public extern symbols across
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+ * language boundaries.
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+ *
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+ * For more details, see 'https://gcc.gnu.org/onlinedocs/gcc/Thread-Local.html'.
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*/
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-#if defined (__cplusplus) && (__cplusplus >= 201103L) && !defined(__APPLE__)
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-# define URCU_TLS_STORAGE_CLASS thread_local
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-#elif defined (__STDC_VERSION__) && (__STDC_VERSION__ >= 201112L)
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-# define URCU_TLS_STORAGE_CLASS _Thread_local
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-#elif defined (_MSC_VER)
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+#if defined(_MSC_VER)
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# define URCU_TLS_STORAGE_CLASS __declspec(thread)
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#else
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# define URCU_TLS_STORAGE_CLASS __thread
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@@ -0,0 +1,30 @@
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config BR2_PACKAGE_LIBURCU_ARCH_SUPPORTS
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bool
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default y
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depends on BR2_arm || BR2_armeb || BR2_aarch64 || BR2_aarch64_be || \
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BR2_i386 || BR2_mips || BR2_mips64 || BR2_mipsel || \
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BR2_mips64el || BR2_nios2 || BR2_powerpc || BR2_powerpc64 || \
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BR2_powerpc64le || BR2_riscv || BR2_sparc64 || BR2_s390x || BR2_x86_64
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depends on BR2_USE_MMU # fork() in test
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config BR2_PACKAGE_LIBURCU
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bool "liburcu"
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depends on BR2_PACKAGE_LIBURCU_ARCH_SUPPORTS
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depends on BR2_TOOLCHAIN_HAS_THREADS
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help
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Userspace implementation of the Read-Copy-Update (RCU)
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synchronization mechanism. This library is mainly used by
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the LTTng tracing infrastructure, but can be used for other
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purposes as well.
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On ARM, because of bug:
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http://gcc.gnu.org/bugzilla/show_bug.cgi?id=58854
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liburcu cannot be built using gcc 4.8.0, 4.8.1 or 4.8.2
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without the following bug fix:
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http://gcc.gnu.org/viewcvs/gcc?view=revision&revision=204665
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http://lttng.org/urcu
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comment "liburcu needs a toolchain w/ threads"
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depends on BR2_PACKAGE_LIBURCU_ARCH_SUPPORTS
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depends on !BR2_TOOLCHAIN_HAS_THREADS
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@@ -0,0 +1,8 @@
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# http://www.lttng.org/files/urcu/userspace-rcu-0.13.0.tar.bz2.sha256
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sha256 cbb20dbe1a892c2a4d8898bac4316176e585392693d498766ccbbc68cf20ba20 userspace-rcu-0.13.0.tar.bz2
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# Hash for license files
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sha256 36b6d3fa47916943fd5fec313c584784946047ec1337a78b440e5992cb595f89 lgpl-2.1.txt
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sha256 8ef8121eddd2fc0779d94331a1d0f1ead9c796343d845e564cd8c8c4ae3d6f6e lgpl-relicensing.txt
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sha256 ab15fd526bd8dd18a9e77ebc139656bf4d33e97fc7238cd11bf60e2b9b8666c6 gpl-2.0.txt
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sha256 e8c070cb093be4b2eaf938a5f1c11621163b2d9cfa2790460cf925d81e442fa7 LICENSE
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@@ -0,0 +1,19 @@
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################################################################################
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#
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# liburcu
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#
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################################################################################
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LIBURCU_VERSION = 0.13.0
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LIBURCU_SITE = http://lttng.org/files/urcu
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LIBURCU_SOURCE = userspace-rcu-$(LIBURCU_VERSION).tar.bz2
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LIBURCU_LICENSE = LGPL-2.1+ (library), MIT-like (few source files listed in LICENSE), GPL-2.0+ (test), GPL-3.0 (few *.m4 files)
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LIBURCU_LICENSE_FILES = lgpl-2.1.txt lgpl-relicensing.txt gpl-2.0.txt LICENSE
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LIBURCU_INSTALL_STAGING = YES
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# ac_cv_prog_cc_c99 is required for BR2_USE_WCHAR=n because the C99 test
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# provided by autoconf relies on wchar_t.
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LIBURCU_CONF_ENV = ac_cv_prog_cc_c99=-std=gnu99
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$(eval $(autotools-package))
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