netbsd-elf.h revision 1.1.1.1 
1/* Common configuration file for NetBSD ELF targets.
2   Copyright (C) 2002, 2007 Free Software Foundation, Inc.
3   Contributed by Wasabi Systems, Inc.
4
5This file is part of GCC.
6
7GCC is free software; you can redistribute it and/or modify
8it under the terms of the GNU General Public License as published by
9the Free Software Foundation; either version 3, or (at your option)
10any later version.
11
12GCC is distributed in the hope that it will be useful,
13but WITHOUT ANY WARRANTY; without even the implied warranty of
14MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
15GNU General Public License for more details.
16
17You should have received a copy of the GNU General Public License
18along 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/* This defines which switch letters take arguments.  On NetBSD, most
30   of the normal cases (defined by gcc.c) apply, and we also have -h*
31   and -z* options (for the linker) (coming from SVR4).  */
32
33#undef SWITCH_TAKES_ARG
34#define SWITCH_TAKES_ARG(CHAR)			\
35  (DEFAULT_SWITCH_TAKES_ARG (CHAR)		\
36   || (CHAR) == 'h'				\
37   || (CHAR) == 'z'				\
38   || (CHAR) == 'R')
39
40
41/* Provide a STARTFILE_SPEC appropriate for NetBSD ELF.  Here we
42   provide support for the special GCC option -static.  On ELF
43   targets, we also add the crtbegin.o file, which provides part
44   of the support for getting C++ file-scope static objects
45   constructed before entering "main".  */
46
47#define NETBSD_STARTFILE_SPEC	\
48  "%{!shared:			\
49     %{pg:gcrt0%O%s}		\
50     %{!pg:			\
51       %{p:gcrt0%O%s}		\
52       %{!p:crt0%O%s}}}		\
53   %:if-exists(crti%O%s)	\
54   %{static:%:if-exists-else(crtbeginT%O%s crtbegin%O%s)} \
55   %{!static:                   \
56     %{!shared:                 \
57       %{!pie:crtbegin%O%s}     \
58       %{pie:crtbeginS%O%s}}    \
59     %{shared:crtbeginS%O%s}}"
60
61#undef STARTFILE_SPEC
62#define STARTFILE_SPEC NETBSD_STARTFILE_SPEC
63
64
65/* Provide an ENDFILE_SPEC appropriate for NetBSD ELF.  Here we
66   add crtend.o, which provides part of the support for getting
67   C++ file-scope static objects deconstructed after exiting "main".  */
68
69#define NETBSD_ENDFILE_SPEC	\
70  "%{!shared:                   \
71    %{!pie:crtend%O%s}          \
72    %{pie:crtendS%O%s}}         \
73   %{shared:crtendS%O%s}        \
74   %:if-exists(crtn%O%s)"
75
76#undef ENDFILE_SPEC
77#define ENDFILE_SPEC NETBSD_ENDFILE_SPEC
78
79/* Provide a LINK_SPEC appropriate for NetBSD ELF.  Here we provide
80   support for the special GCC options -assert, -R, -rpath, -shared,
81   -nostdlib, -static, -rdynamic, and -dynamic-linker.
82
83   Target-specific code can use this in conjunction with any other
84   target-specific LINK_SPEC options.
85
86   Target-specific code must provide the %(netbsd_entry_point) spec.  */
87
88#define NETBSD_LINK_SPEC_ELF \
89  "%{assert*} %{R*} %{rpath*} \
90   %{shared:-shared} \
91   %{symbolic:-Bsymbolic} \
92   %{!shared: \
93     -dc -dp \
94     %{!nostdlib: \
95       %{!r*: \
96	 %{!e*:-e %(netbsd_entry_point)}}} \
97     %{!static: \
98       %{rdynamic:-export-dynamic} \
99       %{!dynamic-linker:-dynamic-linker /usr/libexec/ld.elf_so}} \
100     %{static:-static}}"
101
102/* Use --as-needed -lgcc_s for eh support.  */
103#ifdef HAVE_LD_AS_NEEDED
104#define USE_LD_AS_NEEDED 1
105#endif
106
107#define MFLIB_SPEC " %{fmudflap: -export-dynamic -lmudflap \
108 %{static:%(link_gcc_c_sequence) -lmudflap}} \
109 %{fmudflapth: -export-dynamic -lmudflapth -lpthread \
110 %{static:%(link_gcc_c_sequence) -lmudflapth}} "
111
112#undef TARGET_UNWIND_TABLES_DEFAULT
113#define TARGET_UNWIND_TABLES_DEFAULT true
114