1 /* Definitions of target machine for GNU compiler,
2 for Alpha Linux-based GNU systems.
3 Copyright (C) 1996-2023 Free Software Foundation, Inc.
4 Contributed by Richard Henderson.
5
6 This file is part of GCC.
7
8 GCC is free software; you can redistribute it and/or modify
9 it under the terms of the GNU General Public License as published by
10 the Free Software Foundation; either version 3, or (at your option)
11 any later version.
12
13 GCC is distributed in the hope that it will be useful,
14 but WITHOUT ANY WARRANTY; without even the implied warranty of
15 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
16 GNU General Public License for more details.
17
18 You should have received a copy of the GNU General Public License
19 along with GCC; see the file COPYING3. If not see
20 <http://www.gnu.org/licenses/>. */
21
22 #define TARGET_OS_CPP_BUILTINS() \
23 do { \
24 builtin_define ("__gnu_linux__"); \
25 builtin_define ("_LONGLONG"); \
26 builtin_define_std ("linux"); \
27 builtin_define_std ("unix"); \
28 builtin_assert ("system=linux"); \
29 builtin_assert ("system=unix"); \
30 builtin_assert ("system=posix"); \
31 /* The GNU C++ standard library requires this. */ \
32 if (c_dialect_cxx ()) \
33 builtin_define ("_GNU_SOURCE"); \
34 } while (0)
35
36 #undef LIB_SPEC
37 #define LIB_SPEC \
38 "%{pthread:-lpthread} \
39 %{shared:-lc} \
40 %{!shared: %{profile:-lc_p}%{!profile:-lc}}"
41
42 #undef CPP_SPEC
43 #define CPP_SPEC "%{posix:-D_POSIX_SOURCE} %{pthread:-D_REENTRANT}"
44
45 /* Show that we need a GP when profiling. */
46 #undef TARGET_PROFILING_NEEDS_GP
47 #define TARGET_PROFILING_NEEDS_GP 1
48
49 /* Don't care about faults in the prologue. */
50 #undef TARGET_CAN_FAULT_IN_PROLOGUE
51 #define TARGET_CAN_FAULT_IN_PROLOGUE 1
52
53 /* OS fixes up EV5 data fault on prefetch. */
54 #undef TARGET_FIXUP_EV5_PREFETCH
55 #define TARGET_FIXUP_EV5_PREFETCH 1
56
57 #undef WCHAR_TYPE
58 #define WCHAR_TYPE "int"
59
60 #ifdef SINGLE_LIBC
61 #define OPTION_GLIBC_P(opts) (DEFAULT_LIBC == LIBC_GLIBC)
62 #define OPTION_UCLIBC_P(opts) (DEFAULT_LIBC == LIBC_UCLIBC)
63 #define OPTION_BIONIC_P(opts) (DEFAULT_LIBC == LIBC_BIONIC)
64 #undef OPTION_MUSL_P
65 #define OPTION_MUSL_P(opts) (DEFAULT_LIBC == LIBC_MUSL)
66 #else
67 #define OPTION_GLIBC_P(opts) ((opts)->x_linux_libc == LIBC_GLIBC)
68 #define OPTION_UCLIBC_P(opts) ((opts)->x_linux_libc == LIBC_UCLIBC)
69 #define OPTION_BIONIC_P(opts) ((opts)->x_linux_libc == LIBC_BIONIC)
70 #undef OPTION_MUSL_P
71 #define OPTION_MUSL_P(opts) ((opts)->x_linux_libc == LIBC_MUSL)
72 #endif
73 #define OPTION_GLIBC OPTION_GLIBC_P (&global_options)
74 #define OPTION_UCLIBC OPTION_UCLIBC_P (&global_options)
75 #define OPTION_BIONIC OPTION_BIONIC_P (&global_options)
76 #undef OPTION_MUSL
77 #define OPTION_MUSL OPTION_MUSL_P (&global_options)
78
79 /* Determine what functions are present at the runtime;
80 this includes full c99 runtime and sincos. */
81 #undef TARGET_LIBC_HAS_FUNCTION
82 #define TARGET_LIBC_HAS_FUNCTION linux_libc_has_function
83
84 #define TARGET_POSIX_IO
85
86 /* Provide a STARTFILE_SPEC appropriate for ELF. Here we add the
87 (even more) magical crtbegin.o file which provides part of the
88 support for getting C++ file-scope static object constructed
89 before entering `main'. */
90
91 #undef STARTFILE_SPEC
92 #ifdef HAVE_LD_PIE
93 #define STARTFILE_SPEC \
94 "%{!shared: %{pg|p:gcrt1.o%s;pie:Scrt1.o%s;:crt1.o%s}}\
95 crti.o%s %{static:crtbeginT.o%s;shared|pie:crtbeginS.o%s;:crtbegin.o%s}"
96 #else
97 #define STARTFILE_SPEC \
98 "%{!shared: %{pg|p:gcrt1.o%s;:crt1.o%s}}\
99 crti.o%s %{static:crtbeginT.o%s;shared|pie:crtbeginS.o%s;:crtbegin.o%s}"
100 #endif
101
102 /* Provide a ENDFILE_SPEC appropriate for ELF. Here we tack on the
103 magical crtend.o file which provides part of the support for
104 getting C++ file-scope static object constructed before entering
105 `main', followed by a normal ELF "finalizer" file, `crtn.o'. */
106
107 #undef ENDFILE_SPEC
108 #define ENDFILE_SPEC \
109 "%{Ofast|ffast-math|funsafe-math-optimizations:%{!shared:crtfastmath.o%s}} \
110 %{shared|pie:crtendS.o%s;:crtend.o%s} crtn.o%s"
111
112 #define LINK_GCC_C_SEQUENCE_SPEC \
113 "%{static|static-pie:--start-group} %G %{!nolibc:%L} \
114 %{static|static-pie:--end-group}%{!static:%{!static-pie:%G}}"
115
116 /* Use --as-needed -lgcc_s for eh support. */
117 #ifdef HAVE_LD_AS_NEEDED
118 #define USE_LD_AS_NEEDED 1
119 #endif
120
121 /* Define if long doubles should be mangled as 'g'. */
122 #define TARGET_ALTERNATE_LONG_DOUBLE_MANGLING
123
124 /* -mcpu=native handling only makes sense with compiler running on
125 an Alpha chip. */
126 #if defined(__alpha__) || defined(__alpha)
127 extern const char *host_detect_local_cpu (int argc, const char **argv);
128 # define EXTRA_SPEC_FUNCTIONS \
129 { "local_cpu_detect", host_detect_local_cpu },
130
131 # define MCPU_MTUNE_NATIVE_SPECS \
132 " %{mcpu=native:%<mcpu=native %:local_cpu_detect(cpu)}" \
133 " %{mtune=native:%<mtune=native %:local_cpu_detect(tune)}"
134 #else
135 # define MCPU_MTUNE_NATIVE_SPECS ""
136 #endif
137
138 #define DRIVER_SELF_SPECS MCPU_MTUNE_NATIVE_SPECS