gcc/config/gnu-user.h

   1 /* Definitions for systems using, at least optionally, a GNU
   2    (glibc-based) userspace or other userspace with libc derived from
   3    glibc (e.g. uClibc) or for which similar specs are appropriate.
   4    Copyright (C) 1995-2017 Free Software Foundation, Inc.
   5    Contributed by Eric Youngdale.
   6    Modified for stabs-in-ELF by H.J. Lu (hjl@lucon.org).
   7
   8 This file is part of GCC.
   9
  10 GCC is free software; you can redistribute it and/or modify
  11 it under the terms of the GNU General Public License as published by
  12 the Free Software Foundation; either version 3, or (at your option)
  13 any later version.
  14
  15 GCC is distributed in the hope that it will be useful,
  16 but WITHOUT ANY WARRANTY; without even the implied warranty of
  17 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  18 GNU General Public License for more details.
  19
  20 Under Section 7 of GPL version 3, you are granted additional
  21 permissions described in the GCC Runtime Library Exception, version
  22 3.1, as published by the Free Software Foundation.
  23
  24 You should have received a copy of the GNU General Public License and
  25 a copy of the GCC Runtime Library Exception along with this program;
  26 see the files COPYING3 and COPYING.RUNTIME respectively.  If not, see
  27 <http://www.gnu.org/licenses/>.  */
  28
  29 /* Don't assume anything about the header files.  */
  30 #define NO_IMPLICIT_EXTERN_C
  31
  32 #undef ASM_APP_ON
  33 #define ASM_APP_ON "#APP\n"
  34
  35 #undef ASM_APP_OFF
  36 #define ASM_APP_OFF "#NO_APP\n"
  37
  38 #if ENABLE_OFFLOADING == 1
  39 #define CRTOFFLOADBEGIN "%{fopenacc|fopenmp:crtoffloadbegin%O%s}"
  40 #define CRTOFFLOADEND "%{fopenacc|fopenmp:crtoffloadend%O%s}"
  41 #else
  42 #define CRTOFFLOADBEGIN ""
  43 #define CRTOFFLOADEND ""
  44 #endif
  45
  46 /* Provide a STARTFILE_SPEC appropriate for GNU userspace.  Here we add
  47    the GNU userspace magical crtbegin.o file (see crtstuff.c) which
  48    provides part of the support for getting C++ file-scope static
  49    object constructed before entering `main'.  */
  50
  51 #if defined HAVE_LD_PIE
  52 #define GNU_USER_TARGET_STARTFILE_SPEC \
  53   "%{shared:; \
  54      pg|p|profile:gcrt1.o%s; \
  55      static:crt1.o%s; \
  56      " PIE_SPEC ":Scrt1.o%s; \
  57      :crt1.o%s} \
  58    crti.o%s \
  59    %{static:crtbeginT.o%s; \
  60      shared|" PIE_SPEC ":crtbeginS.o%s; \
  61      :crtbegin.o%s} \
  62    %{fvtable-verify=none:%s; \
  63      fvtable-verify=preinit:vtv_start_preinit.o%s; \
  64      fvtable-verify=std:vtv_start.o%s} \
  65    " CRTOFFLOADBEGIN
  66 #else
  67 #define GNU_USER_TARGET_STARTFILE_SPEC \
  68   "%{shared:; \
  69      pg|p|profile:gcrt1.o%s; \
  70      :crt1.o%s} \
  71    crti.o%s \
  72    %{static:crtbeginT.o%s; \
  73      shared|pie:crtbeginS.o%s; \
  74      :crtbegin.o%s} \
  75    %{fvtable-verify=none:%s; \
  76      fvtable-verify=preinit:vtv_start_preinit.o%s; \
  77      fvtable-verify=std:vtv_start.o%s} \
  78    " CRTOFFLOADBEGIN
  79 #endif
  80 #undef  STARTFILE_SPEC
  81 #define STARTFILE_SPEC GNU_USER_TARGET_STARTFILE_SPEC
  82
  83 /* Provide a ENDFILE_SPEC appropriate for GNU userspace.  Here we tack on
  84    the GNU userspace magical crtend.o file (see crtstuff.c) which
  85    provides part of the support for getting C++ file-scope static
  86    object constructed before entering `main', followed by a normal
  87    GNU userspace "finalizer" file, `crtn.o'.  */
  88
  89 #if defined HAVE_LD_PIE
  90 #define GNU_USER_TARGET_ENDFILE_SPEC \
  91   "%{fvtable-verify=none:%s; \
  92      fvtable-verify=preinit:vtv_end_preinit.o%s; \
  93      fvtable-verify=std:vtv_end.o%s} \
  94    %{static:crtend.o%s; \
  95      shared|" PIE_SPEC ":crtendS.o%s; \
  96      :crtend.o%s} \
  97    crtn.o%s \
  98    " CRTOFFLOADEND
  99 #else
 100 #define GNU_USER_TARGET_ENDFILE_SPEC \
 101   "%{fvtable-verify=none:%s; \
 102      fvtable-verify=preinit:vtv_end_preinit.o%s; \
 103      fvtable-verify=std:vtv_end.o%s} \
 104    %{static:crtend.o%s; \
 105      shared|pie:crtendS.o%s; \
 106      :crtend.o%s} \
 107    crtn.o%s \
 108    " CRTOFFLOADEND
 109 #endif
 110 #undef  ENDFILE_SPEC
 111 #define ENDFILE_SPEC GNU_USER_TARGET_ENDFILE_SPEC
 112
 113 /* This is for -profile to use -lc_p instead of -lc.  */
 114 #define GNU_USER_TARGET_CC1_SPEC "%{profile:-p}"
 115 #ifndef CC1_SPEC
 116 #define CC1_SPEC GNU_USER_TARGET_CC1_SPEC
 117 #endif
 118
 119 /* The GNU C++ standard library requires that these macros be defined.  */
 120 #undef CPLUSPLUS_CPP_SPEC
 121 #define CPLUSPLUS_CPP_SPEC "-D_GNU_SOURCE %(cpp)"
 122
 123 #define GNU_USER_TARGET_NO_PTHREADS_LIB_SPEC \
 124   "%{shared:-lc} \
 125    %{!shared:%{mieee-fp:-lieee} %{profile:-lc_p}%{!profile:-lc}}"
 126
 127 #define GNU_USER_TARGET_LIB_SPEC \
 128   "%{pthread:-lpthread} " \
 129   GNU_USER_TARGET_NO_PTHREADS_LIB_SPEC
 130
 131 #undef  LIB_SPEC
 132 #define LIB_SPEC GNU_USER_TARGET_LIB_SPEC
 133
 134 #if defined(HAVE_LD_EH_FRAME_HDR)
 135 #define LINK_EH_SPEC "%{!static:--eh-frame-hdr} "
 136 #endif
 137
 138 #undef LINK_GCC_C_SEQUENCE_SPEC
 139 #define LINK_GCC_C_SEQUENCE_SPEC \
 140   "%{static:--start-group} %G %L %{static:--end-group}%{!static:%G}"
 141
 142 /* Use --as-needed -lgcc_s for eh support.  */
 143 #ifdef HAVE_LD_AS_NEEDED
 144 #define USE_LD_AS_NEEDED 1
 145 #endif
 146
 147 #define TARGET_POSIX_IO
 148
 149 #undef TARGET_LIBC_HAS_FUNCTION
 150 #define TARGET_LIBC_HAS_FUNCTION gnu_libc_has_function
 151
 152 /* Link -lasan early on the command line.  For -static-libasan, don't link
 153    it for -shared link, the executable should be compiled with -static-libasan
 154    in that case, and for executable link with --{,no-}whole-archive around
 155    it to force everything into the executable.  And similarly for -ltsan
 156    and -llsan.  */
 157 #if defined(HAVE_LD_STATIC_DYNAMIC)
 158 #undef LIBASAN_EARLY_SPEC
 159 #define LIBASAN_EARLY_SPEC "%{!shared:libasan_preinit%O%s} " \
 160   "%{static-libasan:%{!shared:" \
 161   LD_STATIC_OPTION " --whole-archive -lasan --no-whole-archive " \
 162   LD_DYNAMIC_OPTION "}}%{!static-libasan:-lasan}"
 163 #undef LIBTSAN_EARLY_SPEC
 164 #define LIBTSAN_EARLY_SPEC "%{static-libtsan:%{!shared:" \
 165   LD_STATIC_OPTION " --whole-archive -ltsan --no-whole-archive " \
 166   LD_DYNAMIC_OPTION "}}%{!static-libtsan:-ltsan}"
 167 #undef LIBLSAN_EARLY_SPEC
 168 #define LIBLSAN_EARLY_SPEC "%{static-liblsan:%{!shared:" \
 169   LD_STATIC_OPTION " --whole-archive -llsan --no-whole-archive " \
 170   LD_DYNAMIC_OPTION "}}%{!static-liblsan:-llsan}"
 171 #endif