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