1 /* Definitions of target machine for GNU compiler, 2 for Alpha Linux-based GNU systems. 3 Copyright (C) 1996-2020 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 (DEFAULT_LIBC == LIBC_GLIBC) 62 #define OPTION_UCLIBC (DEFAULT_LIBC == LIBC_UCLIBC) 63 #define OPTION_BIONIC (DEFAULT_LIBC == LIBC_BIONIC) 64 #undef OPTION_MUSL 65 #define OPTION_MUSL (DEFAULT_LIBC == LIBC_MUSL) 66 #else 67 #define OPTION_GLIBC (linux_libc == LIBC_GLIBC) 68 #define OPTION_UCLIBC (linux_libc == LIBC_UCLIBC) 69 #define OPTION_BIONIC (linux_libc == LIBC_BIONIC) 70 #undef OPTION_MUSL 71 #define OPTION_MUSL (linux_libc == LIBC_MUSL) 72 #endif 73 74 /* Determine what functions are present at the runtime; 75 this includes full c99 runtime and sincos. */ 76 #undef TARGET_LIBC_HAS_FUNCTION 77 #define TARGET_LIBC_HAS_FUNCTION linux_libc_has_function 78 79 #define TARGET_POSIX_IO 80 81 /* Provide a STARTFILE_SPEC appropriate for ELF. Here we add the 82 (even more) magical crtbegin.o file which provides part of the 83 support for getting C++ file-scope static object constructed 84 before entering `main'. */ 85 86 #undef STARTFILE_SPEC 87 #ifdef HAVE_LD_PIE 88 #define STARTFILE_SPEC \ 89 "%{!shared: %{pg|p:gcrt1.o%s;pie:Scrt1.o%s;:crt1.o%s}}\ 90 crti.o%s %{static:crtbeginT.o%s;shared|pie:crtbeginS.o%s;:crtbegin.o%s}" 91 #else 92 #define STARTFILE_SPEC \ 93 "%{!shared: %{pg|p:gcrt1.o%s;:crt1.o%s}}\ 94 crti.o%s %{static:crtbeginT.o%s;shared|pie:crtbeginS.o%s;:crtbegin.o%s}" 95 #endif 96 97 /* Provide a ENDFILE_SPEC appropriate for ELF. Here we tack on the 98 magical crtend.o file which provides part of the support for 99 getting C++ file-scope static object constructed before entering 100 `main', followed by a normal ELF "finalizer" file, `crtn.o'. */ 101 102 #undef ENDFILE_SPEC 103 #define ENDFILE_SPEC \ 104 "%{Ofast|ffast-math|funsafe-math-optimizations:crtfastmath.o%s} \ 105 %{shared|pie:crtendS.o%s;:crtend.o%s} crtn.o%s" 106 107 #define LINK_GCC_C_SEQUENCE_SPEC \ 108 "%{static|static-pie:--start-group} %G %{!nolibc:%L} \ 109 %{static|static-pie:--end-group}%{!static:%{!static-pie:%G}}" 110 111 /* Use --as-needed -lgcc_s for eh support. */ 112 #ifdef HAVE_LD_AS_NEEDED 113 #define USE_LD_AS_NEEDED 1 114 #endif 115 116 /* Define if long doubles should be mangled as 'g'. */ 117 #define TARGET_ALTERNATE_LONG_DOUBLE_MANGLING 118 119 /* -mcpu=native handling only makes sense with compiler running on 120 an Alpha chip. */ 121 #if defined(__alpha__) || defined(__alpha) 122 extern const char *host_detect_local_cpu (int argc, const char **argv); 123 # define EXTRA_SPEC_FUNCTIONS \ 124 { "local_cpu_detect", host_detect_local_cpu }, 125 126 # define MCPU_MTUNE_NATIVE_SPECS \ 127 " %{mcpu=native:%<mcpu=native %:local_cpu_detect(cpu)}" \ 128 " %{mtune=native:%<mtune=native %:local_cpu_detect(tune)}" 129 #else 130 # define MCPU_MTUNE_NATIVE_SPECS "" 131 #endif 132 133 #define DRIVER_SELF_SPECS MCPU_MTUNE_NATIVE_SPECS 134