gcc/config/netbsd-elf.h

   1 /* Common configuration file for NetBSD ELF targets.
   2    Copyright (C) 2002-2020 Free Software Foundation, Inc.
   3    Contributed by Wasabi Systems, Inc.
   4
   5 This file is part of GCC.
   6
   7 GCC is free software; you can redistribute it and/or modify
   8 it under the terms of the GNU General Public License as published by
   9 the Free Software Foundation; either version 3, or (at your option)
  10 any later version.
  11
  12 GCC is distributed in the hope that it will be useful,
  13 but WITHOUT ANY WARRANTY; without even the implied warranty of
  14 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  15 GNU General Public License for more details.
  16
  17 You should have received a copy of the GNU General Public License
  18 along with GCC; see the file COPYING3.  If not see
  19 <http://www.gnu.org/licenses/>.  */
  20
  21 /* TARGET_OS_CPP_BUILTINS() common to all NetBSD ELF targets.  */
  22 #define NETBSD_OS_CPP_BUILTINS_ELF()            \
  23   do                                            \
  24     {                                           \
  25       NETBSD_OS_CPP_BUILTINS_COMMON();          \
  26     }                                           \
  27   while (0)
  28
  29 /* Provide a STARTFILE_SPEC appropriate for NetBSD ELF.  Here we
  30    provide support for the special GCC option -static.  On ELF
  31    targets, we also add the crtbegin.o file, which provides part
  32    of the support for getting C++ file-scope static objects
  33    constructed before entering "main".  */
  34
  35 #define NETBSD_STARTFILE_SPEC   \
  36   "%{!shared:                   \
  37      %{pg:gcrt0%O%s}            \
  38      %{!pg:                     \
  39        %{p:gcrt0%O%s}           \
  40        %{!p:crt0%O%s}}}         \
  41    %:if-exists(crti%O%s)        \
  42    %{static:%:if-exists-else(crtbeginT%O%s crtbegin%O%s)} \
  43    %{!static:                   \
  44      %{!shared:                 \
  45        %{!pie:crtbegin%O%s}     \
  46        %{pie:crtbeginS%O%s}}    \
  47      %{shared:crtbeginS%O%s}}"
  48
  49 #undef STARTFILE_SPEC
  50 #define STARTFILE_SPEC NETBSD_STARTFILE_SPEC
  51
  52
  53 /* Provide an ENDFILE_SPEC appropriate for NetBSD ELF.  Here we
  54    add crtend.o, which provides part of the support for getting
  55    C++ file-scope static objects deconstructed after exiting "main".  */
  56
  57 #define NETBSD_ENDFILE_SPEC     \
  58   "%{!shared:                   \
  59     %{!pie:crtend%O%s}          \
  60     %{pie:crtendS%O%s}}         \
  61    %{shared:crtendS%O%s}        \
  62    %:if-exists(crtn%O%s)"
  63
  64 #undef ENDFILE_SPEC
  65 #define ENDFILE_SPEC NETBSD_ENDFILE_SPEC
  66
  67 /* Provide a LINK_SPEC appropriate for NetBSD ELF.  Here we provide
  68    support for the special GCC options -assert, -R, -rpath, -shared,
  69    -nostdlib, -static, -rdynamic, and -dynamic-linker.
  70
  71    Target-specific code can use this in conjunction with any other
  72    target-specific LINK_SPEC options.
  73
  74    Target-specific code must provide the %(netbsd_entry_point) spec.  */
  75
  76 #define NETBSD_LINK_LD_ELF_SO_SPEC \
  77   "%{!dynamic-linker:-dynamic-linker /usr/libexec/ld.elf_so}"
  78
  79 #define NETBSD_LINK_SPEC_ELF \
  80   "%{assert*} %{R*} %{rpath*} \
  81    %{shared:-shared} \
  82    %{symbolic:-Bsymbolic} \
  83    %{!shared: \
  84      -dc -dp \
  85      %{!nostdlib: \
  86        %{!r: \
  87          %{!e*:-e %(netbsd_entry_point)}}} \
  88      %{!static: \
  89        %{rdynamic:-export-dynamic} \
  90        -dynamic-linker /usr/libexec/ld.elf_so} \
  91      %{static:-static}}"
  92
  93 /* Provide the standard list of subtarget extra specs for NetBSD targets.  */
  94 #define NETBSD_SUBTARGET_EXTRA_SPECS \
  95   { "netbsd_link_ld_elf_so",    NETBSD_LINK_LD_ELF_SO_SPEC }, \
  96   { "netbsd_cpp_spec",          NETBSD_CPP_SPEC }, \
  97   { "netbsd_link_spec",         NETBSD_LINK_SPEC_ELF }, \
  98   { "netbsd_entry_point",       NETBSD_ENTRY_POINT }, \
  99   { "netbsd_endfile_spec",      NETBSD_ENDFILE_SPEC },
 100
 101 #undef SUBTARGET_EXTRA_SPECS
 102 #define SUBTARGET_EXTRA_SPECS   NETBSD_SUBTARGET_EXTRA_SPECS
 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