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comparison gcc/config/linux.h @ 67:f6334be47118

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update gcc from gcc-4.6-20100522 to gcc-4.6-20110318
author nobuyasu <dimolto@cr.ie.u-ryukyu.ac.jp>
date Tue, 22 Mar 2011 17:18:12 +0900
parents a06113de4d67
children 04ced10e8804
comparison
equal deleted inserted replaced
65:65488c3d617d 67:f6334be47118
1 /* Definitions for Linux-based GNU systems with ELF format 1 /* Definitions for systems using the Linux kernel, with or without
2 MMU, using ELF at the compiler level but possibly FLT for final
3 linked executables and shared libraries in some no-MMU cases, and
4 possibly with a choice of libc implementations.
2 Copyright (C) 1995, 1996, 1997, 1998, 1999, 2000, 2003, 2004, 2005, 2006, 5 Copyright (C) 1995, 1996, 1997, 1998, 1999, 2000, 2003, 2004, 2005, 2006,
3 2007, 2009 Free Software Foundation, Inc. 6 2007, 2009, 2010, 2011 Free Software Foundation, Inc.
4 Contributed by Eric Youngdale. 7 Contributed by Eric Youngdale.
5 Modified for stabs-in-ELF by H.J. Lu (hjl@lucon.org). 8 Modified for stabs-in-ELF by H.J. Lu (hjl@lucon.org).
6 9
7 This file is part of GCC. 10 This file is part of GCC.
8 11
23 You should have received a copy of the GNU General Public License and 26 You should have received a copy of the GNU General Public License and
24 a copy of the GCC Runtime Library Exception along with this program; 27 a copy of the GCC Runtime Library Exception along with this program;
25 see the files COPYING3 and COPYING.RUNTIME respectively. If not, see 28 see the files COPYING3 and COPYING.RUNTIME respectively. If not, see
26 <http://www.gnu.org/licenses/>. */ 29 <http://www.gnu.org/licenses/>. */
27 30
28 /* Don't assume anything about the header files. */ 31 /* C libraries supported on Linux. */
29 #define NO_IMPLICIT_EXTERN_C 32 #ifdef SINGLE_LIBC
30 33 #define OPTION_GLIBC (DEFAULT_LIBC == LIBC_GLIBC)
31 #undef ASM_APP_ON 34 #define OPTION_UCLIBC (DEFAULT_LIBC == LIBC_UCLIBC)
32 #define ASM_APP_ON "#APP\n" 35 #define OPTION_BIONIC (DEFAULT_LIBC == LIBC_BIONIC)
33
34 #undef ASM_APP_OFF
35 #define ASM_APP_OFF "#NO_APP\n"
36
37 #undef MD_EXEC_PREFIX
38 #undef MD_STARTFILE_PREFIX
39
40 /* Provide a STARTFILE_SPEC appropriate for GNU/Linux. Here we add
41 the GNU/Linux magical crtbegin.o file (see crtstuff.c) which
42 provides part of the support for getting C++ file-scope static
43 object constructed before entering `main'. */
44
45 #undef STARTFILE_SPEC
46 #if defined HAVE_LD_PIE
47 #define STARTFILE_SPEC \
48 "%{!shared: %{pg|p|profile:gcrt1.o%s;pie:Scrt1.o%s;:crt1.o%s}} \
49 crti.o%s %{static:crtbeginT.o%s;shared|pie:crtbeginS.o%s;:crtbegin.o%s}"
50 #else 36 #else
51 #define STARTFILE_SPEC \ 37 #define OPTION_GLIBC (linux_libc == LIBC_GLIBC)
52 "%{!shared: %{pg|p|profile:gcrt1.o%s;:crt1.o%s}} \ 38 #define OPTION_UCLIBC (linux_libc == LIBC_UCLIBC)
53 crti.o%s %{static:crtbeginT.o%s;shared|pie:crtbeginS.o%s;:crtbegin.o%s}" 39 #define OPTION_BIONIC (linux_libc == LIBC_BIONIC)
54 #endif 40 #endif
55
56 /* Provide a ENDFILE_SPEC appropriate for GNU/Linux. Here we tack on
57 the GNU/Linux magical crtend.o file (see crtstuff.c) which
58 provides part of the support for getting C++ file-scope static
59 object constructed before entering `main', followed by a normal
60 GNU/Linux "finalizer" file, `crtn.o'. */
61
62 #undef ENDFILE_SPEC
63 #define ENDFILE_SPEC \
64 "%{shared|pie:crtendS.o%s;:crtend.o%s} crtn.o%s"
65
66 /* This is for -profile to use -lc_p instead of -lc. */
67 #ifndef CC1_SPEC
68 #define CC1_SPEC "%{profile:-p}"
69 #endif
70
71 /* The GNU C++ standard library requires that these macros be defined. */
72 #undef CPLUSPLUS_CPP_SPEC
73 #define CPLUSPLUS_CPP_SPEC "-D_GNU_SOURCE %(cpp)"
74
75 #undef LIB_SPEC
76 #define LIB_SPEC \
77 "%{pthread:-lpthread} \
78 %{shared:-lc} \
79 %{!shared:%{mieee-fp:-lieee} %{profile:-lc_p}%{!profile:-lc}}"
80 41
81 #define LINUX_TARGET_OS_CPP_BUILTINS() \ 42 #define LINUX_TARGET_OS_CPP_BUILTINS() \
82 do { \ 43 do { \
83 builtin_define ("__gnu_linux__"); \ 44 if (OPTION_GLIBC) \
45 builtin_define ("__gnu_linux__"); \
84 builtin_define_std ("linux"); \ 46 builtin_define_std ("linux"); \
85 builtin_define_std ("unix"); \ 47 builtin_define_std ("unix"); \
86 builtin_assert ("system=linux"); \ 48 builtin_assert ("system=linux"); \
87 builtin_assert ("system=unix"); \ 49 builtin_assert ("system=unix"); \
88 builtin_assert ("system=posix"); \ 50 builtin_assert ("system=posix"); \
89 } while (0) 51 } while (0)
90 52
91 #if defined(HAVE_LD_EH_FRAME_HDR) 53 /* Determine which dynamic linker to use depending on whether GLIBC or
92 #define LINK_EH_SPEC "%{!static:--eh-frame-hdr} " 54 uClibc or Bionic is the default C library and whether
93 #endif 55 -muclibc or -mglibc or -mbionic has been passed to change the default. */
94 56
95 /* Define this so we can compile MS code for use with WINE. */ 57 #define CHOOSE_DYNAMIC_LINKER1(LIBC1, LIBC2, LIBC3, LD1, LD2, LD3) \
96 #define HANDLE_PRAGMA_PACK_PUSH_POP 58 "%{" LIBC2 ":" LD2 ";:%{" LIBC3 ":" LD3 ";:" LD1 "}}"
97 59
98 #undef LINK_GCC_C_SEQUENCE_SPEC 60 #if DEFAULT_LIBC == LIBC_GLIBC
99 #define LINK_GCC_C_SEQUENCE_SPEC \ 61 #define CHOOSE_DYNAMIC_LINKER(G, U, B) \
100 "%{static:--start-group} %G %L %{static:--end-group}%{!static:%G}" 62 CHOOSE_DYNAMIC_LINKER1 ("mglibc", "muclibc", "mbionic", G, U, B)
101 63 #elif DEFAULT_LIBC == LIBC_UCLIBC
102 /* Use --as-needed -lgcc_s for eh support. */ 64 #define CHOOSE_DYNAMIC_LINKER(G, U, B) \
103 #ifdef HAVE_LD_AS_NEEDED 65 CHOOSE_DYNAMIC_LINKER1 ("muclibc", "mglibc", "mbionic", U, G, B)
104 #define USE_LD_AS_NEEDED 1 66 #elif DEFAULT_LIBC == LIBC_BIONIC
105 #endif 67 #define CHOOSE_DYNAMIC_LINKER(G, U, B) \
106 68 CHOOSE_DYNAMIC_LINKER1 ("mbionic", "mglibc", "muclibc", B, G, U)
107 /* Determine which dynamic linker to use depending on whether GLIBC or
108 uClibc is the default C library and whether -muclibc or -mglibc has
109 been passed to change the default. */
110 #if UCLIBC_DEFAULT
111 #define CHOOSE_DYNAMIC_LINKER(G, U) "%{mglibc:%{muclibc:%e-mglibc and -muclibc used together}" G ";:" U "}"
112 #else 69 #else
113 #define CHOOSE_DYNAMIC_LINKER(G, U) "%{muclibc:%{mglibc:%e-mglibc and -muclibc used together}" U ";:" G "}" 70 #error "Unsupported DEFAULT_LIBC"
114 #endif 71 #endif /* DEFAULT_LIBC */
115 72
116 /* For most targets the following definitions suffice; 73 /* For most targets the following definitions suffice;
117 GLIBC_DYNAMIC_LINKER must be defined for each target using them, or 74 GLIBC_DYNAMIC_LINKER must be defined for each target using them, or
118 GLIBC_DYNAMIC_LINKER32 and GLIBC_DYNAMIC_LINKER64 for targets 75 GLIBC_DYNAMIC_LINKER32 and GLIBC_DYNAMIC_LINKER64 for targets
119 supporting both 32-bit and 64-bit compilation. */ 76 supporting both 32-bit and 64-bit compilation. */
120 #define UCLIBC_DYNAMIC_LINKER "/lib/ld-uClibc.so.0" 77 #define UCLIBC_DYNAMIC_LINKER "/lib/ld-uClibc.so.0"
121 #define UCLIBC_DYNAMIC_LINKER32 "/lib/ld-uClibc.so.0" 78 #define UCLIBC_DYNAMIC_LINKER32 "/lib/ld-uClibc.so.0"
122 #define UCLIBC_DYNAMIC_LINKER64 "/lib/ld64-uClibc.so.0" 79 #define UCLIBC_DYNAMIC_LINKER64 "/lib/ld64-uClibc.so.0"
123 #define LINUX_DYNAMIC_LINKER \ 80 #define BIONIC_DYNAMIC_LINKER "/system/bin/linker"
124 CHOOSE_DYNAMIC_LINKER (GLIBC_DYNAMIC_LINKER, UCLIBC_DYNAMIC_LINKER) 81 #define BIONIC_DYNAMIC_LINKER32 "/system/bin/linker"
125 #define LINUX_DYNAMIC_LINKER32 \ 82 #define BIONIC_DYNAMIC_LINKER64 "/system/bin/linker64"
126 CHOOSE_DYNAMIC_LINKER (GLIBC_DYNAMIC_LINKER32, UCLIBC_DYNAMIC_LINKER32) 83
127 #define LINUX_DYNAMIC_LINKER64 \ 84 #define LINUX_DYNAMIC_LINKER \
128 CHOOSE_DYNAMIC_LINKER (GLIBC_DYNAMIC_LINKER64, UCLIBC_DYNAMIC_LINKER64) 85 CHOOSE_DYNAMIC_LINKER (GLIBC_DYNAMIC_LINKER, UCLIBC_DYNAMIC_LINKER, \
86 BIONIC_DYNAMIC_LINKER)
87 #define LINUX_DYNAMIC_LINKER32 \
88 CHOOSE_DYNAMIC_LINKER (GLIBC_DYNAMIC_LINKER32, UCLIBC_DYNAMIC_LINKER32, \
89 BIONIC_DYNAMIC_LINKER32)
90 #define LINUX_DYNAMIC_LINKER64 \
91 CHOOSE_DYNAMIC_LINKER (GLIBC_DYNAMIC_LINKER64, UCLIBC_DYNAMIC_LINKER64, \
92 BIONIC_DYNAMIC_LINKER64)
129 93
130 /* Determine whether the entire c99 runtime 94 /* Determine whether the entire c99 runtime
131 is present in the runtime library. */ 95 is present in the runtime library. */
132 #define TARGET_C99_FUNCTIONS (OPTION_GLIBC) 96 #define TARGET_C99_FUNCTIONS (OPTION_GLIBC)
133 97
134 /* Whether we have sincos that follows the GNU extension. */ 98 /* Whether we have sincos that follows the GNU extension. */
135 #define TARGET_HAS_SINCOS (OPTION_GLIBC) 99 #define TARGET_HAS_SINCOS (OPTION_GLIBC || OPTION_BIONIC)
136
137 #define TARGET_POSIX_IO