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) 1995-2013 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 #else
  48 #define GNU_USER_TARGET_STARTFILE_SPEC \
  49   "%{!shared: %{pg|p|profile:gcrt1.o%s;:crt1.o%s}} \
  50    crti.o%s %{static:crtbeginT.o%s;shared|pie:crtbeginS.o%s;:crtbegin.o%s}"
  51 #endif
  52 #undef  STARTFILE_SPEC
  53 #define STARTFILE_SPEC GNU_USER_TARGET_STARTFILE_SPEC
  54
  55 /* Provide a ENDFILE_SPEC appropriate for GNU userspace.  Here we tack on
  56    the GNU userspace magical crtend.o file (see crtstuff.c) which
  57    provides part of the support for getting C++ file-scope static
  58    object constructed before entering `main', followed by a normal
  59    GNU userspace "finalizer" file, `crtn.o'.  */
  60
  61 #define GNU_USER_TARGET_ENDFILE_SPEC \
  62   "%{shared|pie:crtendS.o%s;:crtend.o%s} crtn.o%s"
  63 #undef  ENDFILE_SPEC
  64 #define ENDFILE_SPEC GNU_USER_TARGET_ENDFILE_SPEC
  65
  66 /* This is for -profile to use -lc_p instead of -lc.  */
  67 #define GNU_USER_TARGET_CC1_SPEC "%{profile:-p}"
  68 #ifndef CC1_SPEC
  69 #define CC1_SPEC GNU_USER_TARGET_CC1_SPEC
  70 #endif
  71
  72 /* The GNU C++ standard library requires that these macros be defined.  */
  73 #undef CPLUSPLUS_CPP_SPEC
  74 #define CPLUSPLUS_CPP_SPEC "-D_GNU_SOURCE %(cpp)"
  75
  76 #define GNU_USER_TARGET_LIB_SPEC \
  77   "%{pthread:-lpthread} \
  78    %{shared:-lc} \
  79    %{!shared:%{mieee-fp:-lieee} %{profile:-lc_p}%{!profile:-lc}}"
  80 #undef  LIB_SPEC
  81 #define LIB_SPEC GNU_USER_TARGET_LIB_SPEC
  82
  83 #if defined(HAVE_LD_EH_FRAME_HDR)
  84 #define LINK_EH_SPEC "%{!static:--eh-frame-hdr} "
  85 #endif
  86
  87 #undef LINK_GCC_C_SEQUENCE_SPEC
  88 #define LINK_GCC_C_SEQUENCE_SPEC \
  89   "%{static:--start-group} %G %L %{static:--end-group}%{!static:%G}"
  90
  91 /* Use --as-needed -lgcc_s for eh support.  */
  92 #ifdef HAVE_LD_AS_NEEDED
  93 #define USE_LD_AS_NEEDED 1
  94 #endif
  95
  96 #define TARGET_POSIX_IO
  97
  98 #define TARGET_C99_FUNCTIONS 1
  99 #define TARGET_HAS_SINCOS 1
 100
 101 /* Link -lasan early on the command line.  For -static-libasan, don't link
 102    it for -shared link, the executable should be compiled with -static-libasan
 103    in that case, and for executable link link with --{,no-}whole-archive around
 104    it to force everything into the executable.  And similarly for -ltsan.  */
 105 #if defined(HAVE_LD_STATIC_DYNAMIC)
 106 #undef LIBASAN_EARLY_SPEC
 107 #define LIBASAN_EARLY_SPEC "%{!shared:libasan_preinit%O%s} " \
 108   "%{static-libasan:%{!shared:" \
 109   LD_STATIC_OPTION " --whole-archive -lasan --no-whole-archive " \
 110   LD_DYNAMIC_OPTION "}}%{!static-libasan:-lasan}"
 111 #undef LIBTSAN_EARLY_SPEC
 112 #define LIBTSAN_EARLY_SPEC "%{static-libtsan:%{!shared:" \
 113   LD_STATIC_OPTION " --whole-archive -ltsan --no-whole-archive " \
 114   LD_DYNAMIC_OPTION "}}%{!static-libtsan:-ltsan}"
 115 #endif
 116
 117 /* Additional libraries needed by -static-libasan.  */
 118 #undef STATIC_LIBASAN_LIBS
 119 #define STATIC_LIBASAN_LIBS "-ldl -lpthread"
 120
 121 /* Additional libraries needed by -static-libtsan.  */
 122 #undef STATIC_LIBTSAN_LIBS
 123 #define STATIC_LIBTSAN_LIBS "-ldl -lpthread"