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) 1995-2018 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 #undef ASM_APP_ON
  30 #define ASM_APP_ON "#APP\n"
  31
  32 #undef ASM_APP_OFF
  33 #define ASM_APP_OFF "#NO_APP\n"
  34
  35 #if ENABLE_OFFLOADING == 1
  36 #define CRTOFFLOADBEGIN "%{fopenacc|fopenmp:crtoffloadbegin%O%s}"
  37 #define CRTOFFLOADEND "%{fopenacc|fopenmp:crtoffloadend%O%s}"
  38 #else
  39 #define CRTOFFLOADBEGIN ""
  40 #define CRTOFFLOADEND ""
  41 #endif
  42
  43 /* Provide a STARTFILE_SPEC appropriate for GNU userspace.  Here we add
  44    the GNU userspace magical crtbegin.o file (see crtstuff.c) which
  45    provides part of the support for getting C++ file-scope static
  46    object constructed before entering `main'.  */
  47
  48 #if defined HAVE_LD_PIE
  49 #define GNU_USER_TARGET_STARTFILE_SPEC \
  50   "%{shared:; \
  51      pg|p|profile:%{static-pie:grcrt1.o%s;:gcrt1.o%s}; \
  52      static:crt1.o%s; \
  53      static-pie:rcrt1.o%s; \
  54      " PIE_SPEC ":Scrt1.o%s; \
  55      :crt1.o%s} \
  56    crti.o%s \
  57    %{static:crtbeginT.o%s; \
  58      shared|static-pie|" PIE_SPEC ":crtbeginS.o%s; \
  59      :crtbegin.o%s} \
  60    %{fvtable-verify=none:%s; \
  61      fvtable-verify=preinit:vtv_start_preinit.o%s; \
  62      fvtable-verify=std:vtv_start.o%s} \
  63    " CRTOFFLOADBEGIN
  64 #else
  65 #define GNU_USER_TARGET_STARTFILE_SPEC \
  66   "%{shared:; \
  67      pg|p|profile:gcrt1.o%s; \
  68      :crt1.o%s} \
  69    crti.o%s \
  70    %{static:crtbeginT.o%s; \
  71      shared|pie|static-pie:crtbeginS.o%s; \
  72      :crtbegin.o%s} \
  73    %{fvtable-verify=none:%s; \
  74      fvtable-verify=preinit:vtv_start_preinit.o%s; \
  75      fvtable-verify=std:vtv_start.o%s} \
  76    " CRTOFFLOADBEGIN
  77 #endif
  78 #undef  STARTFILE_SPEC
  79 #define STARTFILE_SPEC GNU_USER_TARGET_STARTFILE_SPEC
  80
  81 /* Provide a ENDFILE_SPEC appropriate for GNU userspace.  Here we tack on
  82    the GNU userspace magical crtend.o file (see crtstuff.c) which
  83    provides part of the support for getting C++ file-scope static
  84    object constructed before entering `main', followed by a normal
  85    GNU userspace "finalizer" file, `crtn.o'.  */
  86
  87 #if defined HAVE_LD_PIE
  88 #define GNU_USER_TARGET_ENDFILE_SPEC \
  89   "%{fvtable-verify=none:%s; \
  90      fvtable-verify=preinit:vtv_end_preinit.o%s; \
  91      fvtable-verify=std:vtv_end.o%s} \
  92    %{static:crtend.o%s; \
  93      shared|static-pie|" PIE_SPEC ":crtendS.o%s; \
  94      :crtend.o%s} \
  95    crtn.o%s \
  96    " CRTOFFLOADEND
  97 #else
  98 #define GNU_USER_TARGET_ENDFILE_SPEC \
  99   "%{fvtable-verify=none:%s; \
 100      fvtable-verify=preinit:vtv_end_preinit.o%s; \
 101      fvtable-verify=std:vtv_end.o%s} \
 102    %{static:crtend.o%s; \
 103      shared|pie|static-pie:crtendS.o%s; \
 104      :crtend.o%s} \
 105    crtn.o%s \
 106    " CRTOFFLOADEND
 107 #endif
 108 #undef  ENDFILE_SPEC
 109 #define ENDFILE_SPEC GNU_USER_TARGET_ENDFILE_SPEC
 110
 111 /* This is for -profile to use -lc_p instead of -lc.  */
 112 #define GNU_USER_TARGET_CC1_SPEC "%{profile:-p}"
 113 #ifndef CC1_SPEC
 114 #define CC1_SPEC GNU_USER_TARGET_CC1_SPEC
 115 #endif
 116
 117 /* The GNU C++ standard library requires that these macros be defined.  */
 118 #undef CPLUSPLUS_CPP_SPEC
 119 #define CPLUSPLUS_CPP_SPEC "-D_GNU_SOURCE %(cpp)"
 120
 121 #define GNU_USER_TARGET_NO_PTHREADS_LIB_SPEC \
 122   "%{shared:-lc} \
 123    %{!shared:%{profile:-lc_p}%{!profile:-lc}}"
 124
 125 #define GNU_USER_TARGET_LIB_SPEC \
 126   "%{pthread:-lpthread} " \
 127   GNU_USER_TARGET_NO_PTHREADS_LIB_SPEC
 128
 129 #undef  LIB_SPEC
 130 #define LIB_SPEC GNU_USER_TARGET_LIB_SPEC
 131
 132 #if defined(HAVE_LD_EH_FRAME_HDR)
 133 #define LINK_EH_SPEC "%{!static|static-pie:--eh-frame-hdr} "
 134 #endif
 135
 136 #undef LINK_GCC_C_SEQUENCE_SPEC
 137 #define LINK_GCC_C_SEQUENCE_SPEC \
 138   "%{static|static-pie:--start-group} %G %{!nolibc:%L} \
 139    %{static|static-pie:--end-group}%{!static:%{!static-pie:%G}}"
 140
 141 /* Use --as-needed -lgcc_s for eh support.  */
 142 #ifdef HAVE_LD_AS_NEEDED
 143 #define USE_LD_AS_NEEDED 1
 144 #endif
 145
 146 #define TARGET_POSIX_IO
 147
 148 #undef TARGET_LIBC_HAS_FUNCTION
 149 #define TARGET_LIBC_HAS_FUNCTION gnu_libc_has_function
 150
 151 /* Link -lasan early on the command line.  For -static-libasan, don't link
 152    it for -shared link, the executable should be compiled with -static-libasan
 153    in that case, and for executable link with --{,no-}whole-archive around
 154    it to force everything into the executable.  And similarly for -ltsan
 155    and -llsan.  */
 156 #if defined(HAVE_LD_STATIC_DYNAMIC)
 157 #undef LIBASAN_EARLY_SPEC
 158 #define LIBASAN_EARLY_SPEC "%{!shared:libasan_preinit%O%s} " \
 159   "%{static-libasan:%{!shared:" \
 160   LD_STATIC_OPTION " --whole-archive -lasan --no-whole-archive " \
 161   LD_DYNAMIC_OPTION "}}%{!static-libasan:-lasan}"
 162 #undef LIBTSAN_EARLY_SPEC
 163 #define LIBTSAN_EARLY_SPEC "%{!shared:libtsan_preinit%O%s} " \
 164   "%{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 "%{!shared:liblsan_preinit%O%s} " \
 169   "%{static-liblsan:%{!shared:" \
 170   LD_STATIC_OPTION " --whole-archive -llsan --no-whole-archive " \
 171   LD_DYNAMIC_OPTION "}}%{!static-liblsan:-llsan}"
 172 #endif