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From 70c2cb98fb129b4766b5da0f945dc41fd568c77a Mon Sep 17 00:00:00 2001
From: Max Filippov <jcmvbkbc@gmail.com>
Date: Sat, 22 Aug 2015 08:44:26 +0300
Subject: [PATCH] xtensa: add uclinux support
2015-10-03 Max Filippov <jcmvbkbc@gmail.com>
gcc/
* config.gcc (xtensa*-*-uclinux*): New configuration.
* config/xtensa/uclinux.h: New file.
* config/xtensa/uclinux.opt: New file.
libgcc/
* config.host (xtensa*-*-uclinux*): New configuration.
Signed-off-by: Max Filippov <jcmvbkbc@gmail.com>
---
Backported from: r228450
gcc/config.gcc | 5 ++++
gcc/config/xtensa/uclinux.h | 69 +++++++++++++++++++++++++++++++++++++++++++
gcc/config/xtensa/uclinux.opt | 32 ++++++++++++++++++++
libgcc/config.host | 5 ++++
4 files changed, 111 insertions(+)
create mode 100644 gcc/config/xtensa/uclinux.h
create mode 100644 gcc/config/xtensa/uclinux.opt
Index: b/gcc/config.gcc
===================================================================
--- a/gcc/config.gcc
+++ b/gcc/config.gcc
@@ -2871,6 +2871,11 @@
tm_file="${tm_file} dbxelf.h elfos.h gnu-user.h linux.h glibc-stdint.h xtensa/linux.h"
tmake_file="${tmake_file} xtensa/t-xtensa"
;;
+xtensa*-*-uclinux*)
+ tm_file="${tm_file} dbxelf.h elfos.h gnu-user.h linux.h glibc-stdint.h xtensa/uclinux.h"
+ tmake_file="${tmake_file} xtensa/t-xtensa"
+ extra_options="${extra_options} xtensa/uclinux.opt"
+ ;;
am33_2.0-*-linux*)
tm_file="mn10300/mn10300.h dbxelf.h elfos.h gnu-user.h linux.h glibc-stdint.h mn10300/linux.h"
gas=yes gnu_ld=yes
Index: b/gcc/config/xtensa/uclinux.h
===================================================================
--- /dev/null
+++ b/gcc/config/xtensa/uclinux.h
@@ -0,0 +1,69 @@
+/* Xtensa uClinux configuration.
+ Derived from the configuration for GCC for Intel i386 running Linux.
+ Copyright (C) 2001-2015 Free Software Foundation, Inc.
+
+This file is part of GCC.
+
+GCC is free software; you can redistribute it and/or modify it under
+the terms of the GNU General Public License as published by the Free
+Software Foundation; either version 3, or (at your option) any later
+version.
+
+GCC is distributed in the hope that it will be useful, but WITHOUT ANY
+WARRANTY; without even the implied warranty of MERCHANTABILITY or
+FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
+for more details.
+
+You should have received a copy of the GNU General Public License
+along with GCC; see the file COPYING3. If not see
+<http://www.gnu.org/licenses/>. */
+
+#undef TARGET_OS_CPP_BUILTINS
+#define TARGET_OS_CPP_BUILTINS() \
+ do \
+ { \
+ GNU_USER_TARGET_OS_CPP_BUILTINS (); \
+ builtin_define ("__uClinux__"); \
+ } \
+ while (0)
+
+#undef SUBTARGET_CPP_SPEC
+#define SUBTARGET_CPP_SPEC "%{posix:-D_POSIX_SOURCE} %{pthread:-D_REENTRANT}"
+
+#undef SIZE_TYPE
+#define SIZE_TYPE "unsigned int"
+
+#undef PTRDIFF_TYPE
+#define PTRDIFF_TYPE "int"
+
+#undef WCHAR_TYPE
+#define WCHAR_TYPE "long int"
+
+#undef WCHAR_TYPE_SIZE
+#define WCHAR_TYPE_SIZE 32
+
+#undef ASM_SPEC
+#define ASM_SPEC \
+ "%{mtext-section-literals:--text-section-literals} \
+ %{mno-text-section-literals:--no-text-section-literals} \
+ %{mtarget-align:--target-align} \
+ %{mno-target-align:--no-target-align} \
+ %{mlongcalls:--longcalls} \
+ %{mno-longcalls:--no-longcalls} \
+ %{mauto-litpools:--auto-litpools} \
+ %{mno-auto-litpools:--no-auto-litpools}"
+
+#undef LINK_SPEC
+#define LINK_SPEC "%{!no-elf2flt:%{!elf2flt*:-elf2flt}}"
+
+#undef LOCAL_LABEL_PREFIX
+#define LOCAL_LABEL_PREFIX "."
+
+/* Always enable "-fpic" for Xtensa Linux. */
+#define XTENSA_ALWAYS_PIC 1
+
+#undef TARGET_LIBC_HAS_FUNCTION
+#define TARGET_LIBC_HAS_FUNCTION no_c99_libc_has_function
+
+#undef DBX_REGISTER_NUMBER
+
Index: b/gcc/config/xtensa/uclinux.opt
===================================================================
--- /dev/null
+++ b/gcc/config/xtensa/uclinux.opt
@@ -0,0 +1,32 @@
+; Xtensa uClinux options.
+
+; Copyright (C) 2015 Free Software Foundation, Inc.
+;
+; This file is part of GCC.
+;
+; GCC is free software; you can redistribute it and/or modify it under
+; the terms of the GNU General Public License as published by the Free
+; Software Foundation; either version 3, or (at your option) any later
+; version.
+;
+; GCC is distributed in the hope that it will be useful, but WITHOUT ANY
+; WARRANTY; without even the implied warranty of MERCHANTABILITY or
+; FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
+; for more details.
+;
+; You should have received a copy of the GNU General Public License
+; along with GCC; see the file COPYING3. If not see
+; <http://www.gnu.org/licenses/>.
+
+; See the GCC internals manual (options.texi) for a description of
+; this file's format.
+
+; Please try to keep this file in ASCII collating order.
+
+elf2flt
+Driver
+
+elf2flt=
+Driver JoinedOrMissing
+
+; This comment is to ensure we retain the blank line above.
Index: b/libgcc/config.host
===================================================================
--- a/libgcc/config.host
+++ b/libgcc/config.host
@@ -1213,6 +1213,11 @@
tmake_file="$tmake_file xtensa/t-xtensa xtensa/t-linux t-slibgcc-libgcc"
md_unwind_header=xtensa/linux-unwind.h
;;
+xtensa*-*-uclinux*)
+ tmake_file="$tmake_file xtensa/t-xtensa xtensa/t-linux t-slibgcc-libgcc"
+ md_unwind_header=xtensa/linux-unwind.h
+ extra_parts="$extra_parts crtbeginS.o crtbeginT.o crtendS.o"
+ ;;
am33_2.0-*-linux*)
# Don't need crtbeginT.o from *-*-linux* default.
extra_parts="crtbegin.o crtend.o crtbeginS.o crtendS.o"
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