[Buildroot] [PATCH] strace: fix build for m68k

[Baruch Siach]

Add upstream patch fixing build for m68k target.

Fixes:
http://autobuild.buildroot.net/results/bef/befdcb3f87c0490cd623520403b9467ec7359950/
http://autobuild.buildroot.net/results/ddb/ddb7616991468bc45d85aa1b56bec2cb5eb897c4/

Signed-off-by: Baruch Siach <baruch at tkos.co.il>
---
 package/strace/0001-m68k-fix-build.patch | 97 ++++++++++++++++++++++++
 1 file changed, 97 insertions(+)
 create mode 100644 package/strace/0001-m68k-fix-build.patch

diff --git a/package/strace/0001-m68k-fix-build.patch b/package/strace/0001-m68k-fix-build.patch
new file mode 100644
index 000000000000..9675eaaa3c71
--- /dev/null
+++ b/package/strace/0001-m68k-fix-build.patch
@@ -0,0 +1,97 @@
+From 6ebf6c4f9e5ebca123a5b5f24afe67cf0473cf92 Mon Sep 17 00:00:00 2001
+From: "Dmitry V. Levin" <ldv at altlinux.org>
+Date: Wed, 21 Feb 2018 23:03:27 +0000
+Subject: [PATCH] m68k: fix build
+
+When <sys/reg.h> is included after <linux/ptrace.h>, the build fails
+on m68k with the following diagnostics:
+
+  In file included from /usr/include/linux/ptrace.h:101:0,
+                   from ptrace.h:51,
+                   from sigreturn.c:2:
+  /usr/include/m68k-linux-gnu/sys/reg.h:26:3: error: expected identifier
+  before numeric constant
+     PT_D1 = 0,
+     ^
+
+Apparently, the only architecture where strace needs definitions
+provided by <sys/reg.h> is x86_64, other three (m68k, tile, and x86)
+are fine with definitions already provided by <linux/ptrace.h>.
+
+Fix the issue by getting rid of <sys/reg.h> and defining necessary
+macros in linux/x86_64/arch_regs.h file.
+
+* configure.ac (AC_CHECK_HEADERS): Remove sys/reg.h.
+* regs.h: Do not include <sys/reg.h>.
+* linux/x86_64/arch_regs.h (R15, R14, R13, R12, RBP, RBX, R11, R10,
+R9, R8, RAX, RCX, RDX, RSI, RDI, ORIG_RAX, RIP, CS, EFLAGS, RSP, SS,
+FS_BASE, GS_BASE, DS, ES, FS, GS): New macros.
+* NEWS: Mention this fix.
+
+Fixes: v4.21~21 ("Include <sys/ptrace.h> early")
+[baruch: drop the NEWS and configure.ac hunks]
+Signed-off-by: Baruch Siach <baruch at tkos.co.il>
+---
+Upstream status: commit 6ebf6c4f9e5e
+
+ NEWS                     |  3 +++
+ configure.ac             |  1 -
+ linux/x86_64/arch_regs.h | 29 +++++++++++++++++++++++++++++
+ regs.h                   |  5 -----
+ 4 files changed, 32 insertions(+), 6 deletions(-)
+
+diff --git a/linux/x86_64/arch_regs.h b/linux/x86_64/arch_regs.h
+index c2ccee671d4f..d502ca4bf202 100644
+--- a/linux/x86_64/arch_regs.h
++++ b/linux/x86_64/arch_regs.h
+@@ -1,2 +1,31 @@
+ extern uint32_t *const i386_esp_ptr;
+ extern uint64_t *const x86_64_rsp_ptr;
++
++/* <asm/ptrace.h> does not provide these definitions.  */
++#define R15		0
++#define R14		1
++#define R13		2
++#define R12		3
++#define RBP		4
++#define RBX		5
++#define R11		6
++#define R10		7
++#define R9		8
++#define R8		9
++#define RAX		10
++#define RCX		11
++#define RDX		12
++#define RSI		13
++#define RDI		14
++#define ORIG_RAX	15
++#define RIP		16
++#define CS		17
++#define EFLAGS		18
++#define RSP		19
++#define SS		20
++#define FS_BASE		21
++#define GS_BASE		22
++#define DS		23
++#define ES		24
++#define FS		25
++#define GS		26
+diff --git a/regs.h b/regs.h
+index d89581d7dd3f..7a044cef8fbf 100644
+--- a/regs.h
++++ b/regs.h
+@@ -2,11 +2,6 @@
+ #define STRACE_REGS_H
+ 
+ #include <sys/user.h>
+-
+-#ifdef HAVE_SYS_REG_H
+-# include <sys/reg.h>
+-#endif
+-
+ #include "arch_regs.h"
+ 
+ #endif /* !STRACE_REGS_H */
+-- 
+2.17.0
+
-- 
2.17.0