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) 1995-2015 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 /* Provide a STARTFILE_SPEC appropriate for GNU userspace.  Here we add
  39    the GNU userspace magical crtbegin.o file (see crtstuff.c) which
  40    provides part of the support for getting C++ file-scope static
  41    object constructed before entering `main'.  */
  42
  43 #if defined HAVE_LD_PIE
  44 #define GNU_USER_TARGET_STARTFILE_SPEC \
  45   "%{!shared: %{pg|p|profile:gcrt1.o%s;: \
  46     %{" PIE_SPEC ":Scrt1.o%s} %{" NO_PIE_SPEC ":crt1.o%s}}} \
  47    crti.o%s %{static:crtbeginT.o%s;: %{shared:crtbeginS.o%s} \
  48               %{" PIE_SPEC ":crtbeginS.o%s} \
  49               %{" NO_PIE_SPEC ":crtbegin.o%s}} \
  50    %{fvtable-verify=none:%s; \
  51      fvtable-verify=preinit:vtv_start_preinit.o%s; \
  52      fvtable-verify=std:vtv_start.o%s}"
  53 #else
  54 #define GNU_USER_TARGET_STARTFILE_SPEC \
  55   "%{!shared: %{pg|p|profile:gcrt1.o%s;:crt1.o%s}} \
  56    crti.o%s %{static:crtbeginT.o%s;shared|pie:crtbeginS.o%s;:crtbegin.o%s} \
  57    %{fvtable-verify=none:%s; \
  58      fvtable-verify=preinit:vtv_start_preinit.o%s; \
  59      fvtable-verify=std:vtv_start.o%s}"
  60 #endif
  61 #undef  STARTFILE_SPEC
  62 #define STARTFILE_SPEC GNU_USER_TARGET_STARTFILE_SPEC
  63
  64 /* Provide a ENDFILE_SPEC appropriate for GNU userspace.  Here we tack on
  65    the GNU userspace magical crtend.o file (see crtstuff.c) which
  66    provides part of the support for getting C++ file-scope static
  67    object constructed before entering `main', followed by a normal
  68    GNU userspace "finalizer" file, `crtn.o'.  */
  69
  70 #if defined HAVE_LD_PIE
  71 #define GNU_USER_TARGET_ENDFILE_SPEC \
  72   "%{fvtable-verify=none:%s; \
  73      fvtable-verify=preinit:vtv_end_preinit.o%s; \
  74      fvtable-verify=std:vtv_end.o%s} \
  75    %{shared:crtendS.o%s;: %{" PIE_SPEC ":crtendS.o%s} \
  76    %{" NO_PIE_SPEC ":crtend.o%s}} crtn.o%s"
  77 #else
  78 #define GNU_USER_TARGET_ENDFILE_SPEC \
  79   "%{fvtable-verify=none:%s; \
  80      fvtable-verify=preinit:vtv_end_preinit.o%s; \
  81      fvtable-verify=std:vtv_end.o%s} \
  82    %{shared|pie:crtendS.o%s;:crtend.o%s} crtn.o%s"
  83 #endif
  84 #undef  ENDFILE_SPEC
  85 #define ENDFILE_SPEC GNU_USER_TARGET_ENDFILE_SPEC
  86
  87 /* This is for -profile to use -lc_p instead of -lc.  */
  88 #define GNU_USER_TARGET_CC1_SPEC "%{profile:-p}"
  89 #ifndef CC1_SPEC
  90 #define CC1_SPEC GNU_USER_TARGET_CC1_SPEC
  91 #endif
  92
  93 /* The GNU C++ standard library requires that these macros be defined.  */
  94 #undef CPLUSPLUS_CPP_SPEC
  95 #define CPLUSPLUS_CPP_SPEC "-D_GNU_SOURCE %(cpp)"
  96
  97 #define GNU_USER_TARGET_NO_PTHREADS_LIB_SPEC \
  98   "%{shared:-lc} \
  99    %{!shared:%{mieee-fp:-lieee} %{profile:-lc_p}%{!profile:-lc}}"
 100
 101 #define GNU_USER_TARGET_LIB_SPEC \
 102   "%{pthread:-lpthread} " \
 103   GNU_USER_TARGET_NO_PTHREADS_LIB_SPEC
 104
 105 #undef  LIB_SPEC
 106 #define LIB_SPEC GNU_USER_TARGET_LIB_SPEC
 107
 108 #if defined(HAVE_LD_EH_FRAME_HDR)
 109 #define LINK_EH_SPEC "%{!static:--eh-frame-hdr} "
 110 #endif
 111
 112 #undef LINK_GCC_C_SEQUENCE_SPEC
 113 #define LINK_GCC_C_SEQUENCE_SPEC \
 114   "%{static:--start-group} %G %L %{static:--end-group}%{!static:%G}"
 115
 116 /* Use --as-needed -lgcc_s for eh support.  */
 117 #ifdef HAVE_LD_AS_NEEDED
 118 #define USE_LD_AS_NEEDED 1
 119 #endif
 120
 121 #define TARGET_POSIX_IO
 122
 123 #undef TARGET_LIBC_HAS_FUNCTION
 124 #define TARGET_LIBC_HAS_FUNCTION gnu_libc_has_function
 125
 126 /* Link -lasan early on the command line.  For -static-libasan, don't link
 127    it for -shared link, the executable should be compiled with -static-libasan
 128    in that case, and for executable link with --{,no-}whole-archive around
 129    it to force everything into the executable.  And similarly for -ltsan
 130    and -llsan.  */
 131 #if defined(HAVE_LD_STATIC_DYNAMIC)
 132 #undef LIBASAN_EARLY_SPEC
 133 #define LIBASAN_EARLY_SPEC "%{!shared:libasan_preinit%O%s} " \
 134   "%{static-libasan:%{!shared:" \
 135   LD_STATIC_OPTION " --whole-archive -lasan --no-whole-archive " \
 136   LD_DYNAMIC_OPTION "}}%{!static-libasan:-lasan}"
 137 #undef LIBTSAN_EARLY_SPEC
 138 #define LIBTSAN_EARLY_SPEC "%{static-libtsan:%{!shared:" \
 139   LD_STATIC_OPTION " --whole-archive -ltsan --no-whole-archive " \
 140   LD_DYNAMIC_OPTION "}}%{!static-libtsan:-ltsan}"
 141 #undef LIBLSAN_EARLY_SPEC
 142 #define LIBLSAN_EARLY_SPEC "%{static-liblsan:%{!shared:" \
 143   LD_STATIC_OPTION " --whole-archive -llsan --no-whole-archive " \
 144   LD_DYNAMIC_OPTION "}}%{!static-liblsan:-llsan}"
 145 #endif