semi.h

linux下的gcc编译器

/* Definitions of target machine for GNU compiler.  ARM on semi-hosted platform
   Copyright (C) 1994, 1995, 1996, 1997, 2001 Free Software Foundation, Inc.
   Contributed by Richard Earnshaw ([e-mail])

This file is part of GNU CC.

GNU CC 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 2, or (at your option)
any later version.

GNU CC 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 GNU CC; see the file COPYING.  If not, write to
the Free Software Foundation, 59 Temple Place - Suite 330,
Boston, MA 02111-1307, USA.  */

#define STARTFILE_SPEC  "crt0.o%s"

#ifndef LIB_SPEC
#define LIB_SPEC "-lc"
#endif

#ifndef SUBTARGET_CPP_SPEC
#define SUBTARGET_CPP_SPEC "-D__semi__"
#endif

#ifndef LINK_SPEC
#define LINK_SPEC "%{mbig-endian:-EB} -X"
#endif

#ifndef TARGET_VERSION
#define TARGET_VERSION fputs (" (ARM/semi-hosted)", stderr);
#endif

#ifndef TARGET_DEFAULT
#define TARGET_DEFAULT (ARM_FLAG_APCS_32 | ARM_FLAG_APCS_FRAME)
#endif

#ifndef SUBTARGET_EXTRA_SPECS
#define SUBTARGET_EXTRA_SPECS \
  { "subtarget_extra_asm_spec",	SUBTARGET_EXTRA_ASM_SPEC },
#endif

#ifndef SUBTARGET_EXTRA_ASM_SPEC
#define SUBTARGET_EXTRA_ASM_SPEC ""
#endif

/* The compiler supports PIC code generation, even though the binutils
   may not.  If we are asked to compile position independent code, we
   always pass -k to the assembler.  If it doesn't recognize it, then
   it will barf, which probably means that it doesn't know how to
   assemble PIC code.  This is what we want, since otherwise tools
   may incorrectly assume we support PIC compilation even if the
   binutils can't.  */
#ifndef ASM_SPEC
#define ASM_SPEC "\
%{fpic: -k} %{fPIC: -k} \
%{mbig-endian:-EB} \
%{mcpu=*:-mcpu=%*} \
%{march=*:-march=%*} \
%{mapcs-float:-mfloat} \
%{msoft-float:-mno-fpu} \
%{mthumb-interwork:-mthumb-interwork} \
%(subtarget_extra_asm_spec)"
#endif

#undef  CPP_APCS_PC_DEFAULT_SPEC
#define CPP_APCS_PC_DEFAULT_SPEC "-D__APCS_32__"