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