Bump buidlroot version to 2018.02.6

bsp/buildroot/package/busybox/0004-arch-sparc-sparc64-Makefile-define-ARCH_FPIC.patch

@@ -0,0 +1,79 @@
+From 43593d65827f4e7f848fc410321b0b2deed986fc Mon Sep 17 00:00:00 2001
+From: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>
+Date: Fri, 14 Jul 2017 21:54:37 +0200
+Subject: [PATCH] arch/{sparc,sparc64}/Makefile: define ARCH_FPIC
+
+Building Busybox on SPARC or SPARC64 with CONFIG_BUILD_LIBBUSYBOX=y
+currently fails with:
+
+miscutils/lib.a(i2c_tools.o): In function `i2c_dev_open':
+i2c_tools.c:(.text.i2c_dev_open+0x14): relocation truncated to fit: R_SPARC_GOT13 against `.LC0'
+i2c_tools.c:(.text.i2c_dev_open+0x38): relocation truncated to fit: R_SPARC_GOT13 against symbol `bb_errno' defined in COMMON section in libbb/lib.a(ptr_to_globals.o)
+i2c_tools.c:(.text.i2c_dev_open+0x6c): relocation truncated to fit: R_SPARC_GOT13 against `.LC1'
+miscutils/lib.a(i2c_tools.o): In function `check_funcs_test_end':
+i2c_tools.c:(.text.check_funcs_test_end+0x24): relocation truncated to fit: R_SPARC_GOT13 against `.LC2'
+i2c_tools.c:(.text.check_funcs_test_end+0x2c): relocation truncated to fit: R_SPARC_GOT13 against `.LC3'
+miscutils/lib.a(i2c_tools.o): In function `check_read_funcs':
+i2c_tools.c:(.text.check_read_funcs+0x30): relocation truncated to fit: R_SPARC_GOT13 against `.LC10'
+i2c_tools.c:(.text.check_read_funcs+0x80): relocation truncated to fit: R_SPARC_GOT13 against `.LC4'
+i2c_tools.c:(.text.check_read_funcs+0x98): relocation truncated to fit: R_SPARC_GOT13 against `.LC5'
+i2c_tools.c:(.text.check_read_funcs+0xc0): relocation truncated to fit: R_SPARC_GOT13 against `.LC6'
+i2c_tools.c:(.text.check_read_funcs+0xe0): relocation truncated to fit: R_SPARC_GOT13 against `.LC7'
+i2c_tools.c:(.text.check_read_funcs+0xf8): additional relocation overflows omitted from the output
+
+As stated by the gcc documentation, the SPARC architecture has a
+limited GOT size, which prevents moderately large binaries to be built
+with -fpic, and -fPIC is necessary. From gcc's documentation:
+
+'-fpic'
+     Generate position-independent code (PIC) suitable for use in a
+     shared library, if supported for the target machine.  Such code
+     accesses all constant addresses through a global offset table
+     (GOT).  The dynamic loader resolves the GOT entries when the
+     program starts (the dynamic loader is not part of GCC; it is part
+     of the operating system).  If the GOT size for the linked
+     executable exceeds a machine-specific maximum size, you get an
+     error message from the linker indicating that '-fpic' does not
+     work; in that case, recompile with '-fPIC' instead.  (These
+     maximums are 8k on the SPARC, 28k on AArch64 and 32k on the m68k
+     and RS/6000.  The x86 has no such limit.)
+
+'-fPIC'
+     If supported for the target machine, emit position-independent
+     code, suitable for dynamic linking and avoiding any limit on the
+     size of the global offset table.  This option makes a difference on
+     AArch64, m68k, PowerPC and SPARC.
+
+With a limit of 8KB on SPARC, we quickly reach this limit, and we hit
+it when building Busybox on SPARC/SPARC64 with the
+CONFIG_BUILD_LIBBUSYBOX=y option enabled.
+
+Therefore, this commit redefines ARCH_FPIC as -fPIC on sparc and
+sparc64 to solve this issue.
+
+[Submitted upstream: http://lists.busybox.net/pipermail/busybox/2017-July/085633.html]
+Signed-off-by: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>
+---
+ arch/sparc/Makefile   | 1 +
+ arch/sparc64/Makefile | 1 +
+ 2 files changed, 2 insertions(+)
+ create mode 100644 arch/sparc/Makefile
+ create mode 100644 arch/sparc64/Makefile
+
+diff --git a/arch/sparc/Makefile b/arch/sparc/Makefile
+new file mode 100644
+index 0000000..4d6c5fb
+--- /dev/null
++++ b/arch/sparc/Makefile
+@@ -0,0 +1 @@
++ARCH_FPIC = -fPIC
+diff --git a/arch/sparc64/Makefile b/arch/sparc64/Makefile
+new file mode 100644
+index 0000000..4d6c5fb
+--- /dev/null
++++ b/arch/sparc64/Makefile
+@@ -0,0 +1 @@
++ARCH_FPIC = -fPIC
+-- 
+2.9.4
+