/* Definitions of target machine for GNU compiler,
for Alpha Linux-based GNU systems.
- Copyright (C) 1996, 1997 Free Software Foundation, Inc.
+ Copyright (C) 1996-2020 Free Software Foundation, Inc.
Contributed by Richard Henderson.
-This file is part of GNU CC.
+This file is part of GCC.
-GNU CC is free software; you can redistribute it and/or modify
+GCC is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
-the Free Software Foundation; either version 2, or (at your option)
+the Free Software Foundation; either version 3, or (at your option)
any later version.
-GNU CC is distributed in the hope that it will be useful,
+GCC is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
-along with GNU CC; see the file COPYING. If not, write to
-the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA. */
-
-#undef TARGET_DEFAULT
-#define TARGET_DEFAULT (MASK_FP | MASK_FPREGS | MASK_GAS)
-
-#undef CPP_PREDEFINES
-#define CPP_PREDEFINES "\
--D__alpha -D__alpha__ -D__linux__ -D__linux -D_LONGLONG -Dlinux -Dunix \
--Asystem(linux) -Acpu(alpha) -Amachine(alpha)" SUB_CPP_PREDEFINES
+along with GCC; see the file COPYING3. If not see
+<http://www.gnu.org/licenses/>. */
+
+#define TARGET_OS_CPP_BUILTINS() \
+ do { \
+ builtin_define ("__gnu_linux__"); \
+ builtin_define ("_LONGLONG"); \
+ builtin_define_std ("linux"); \
+ builtin_define_std ("unix"); \
+ builtin_assert ("system=linux"); \
+ builtin_assert ("system=unix"); \
+ builtin_assert ("system=posix"); \
+ /* The GNU C++ standard library requires this. */ \
+ if (c_dialect_cxx ()) \
+ builtin_define ("_GNU_SOURCE"); \
+ } while (0)
#undef LIB_SPEC
-#define LIB_SPEC "%{pg:-lgmon} %{pg:-lc_p} %{!pg:-lc}"
-
-#undef ASM_SPEC
-#define ASM_SPEC "-nocpp"
-
-/* Generate calls to memcpy, etc., not bcopy, etc. */
-#define TARGET_MEM_FUNCTIONS
+#define LIB_SPEC \
+ "%{pthread:-lpthread} \
+ %{shared:-lc} \
+ %{!shared: %{profile:-lc_p}%{!profile:-lc}}"
-#undef FUNCTION_PROFILER
-#define FUNCTION_PROFILER(FILE, LABELNO) \
- fputs ("\tlda $28,_mcount\n\tjsr $28,($28),_mcount\n", (FILE))
+#undef CPP_SPEC
+#define CPP_SPEC "%{posix:-D_POSIX_SOURCE} %{pthread:-D_REENTRANT}"
/* Show that we need a GP when profiling. */
-#define TARGET_PROFILING_NEEDS_GP
-
-/* Emit RTL insns to initialize the variable parts of a trampoline.
- FNADDR is an RTX for the address of the function's pure code.
- CXT is an RTX for the static chain value for the function.
-
- This differs from the standard version in that:
-
- We do not initialize the "hint" field because it only has an 8k
- range and so the target is in range of something on the stack.
- Omitting the hint saves a bogus branch-prediction cache line load.
-
- GNU/Linux always has an executable stack -- no need for a system call. */
-
-#undef INITIALIZE_TRAMPOLINE
-#define INITIALIZE_TRAMPOLINE(TRAMP, FNADDR, CXT) \
-{ \
- rtx _addr; \
- \
- _addr = memory_address (Pmode, plus_constant ((TRAMP), 16)); \
- emit_move_insn (gen_rtx (MEM, Pmode, _addr), (FNADDR)); \
- _addr = memory_address (Pmode, plus_constant ((TRAMP), 24)); \
- emit_move_insn (gen_rtx (MEM, Pmode, _addr), (CXT)); \
- \
- emit_insn (gen_rtx (UNSPEC_VOLATILE, VOIDmode, \
- gen_rtvec (1, const0_rtx), 0)); \
-}
+#undef TARGET_PROFILING_NEEDS_GP
+#define TARGET_PROFILING_NEEDS_GP 1
+
+/* Don't care about faults in the prologue. */
+#undef TARGET_CAN_FAULT_IN_PROLOGUE
+#define TARGET_CAN_FAULT_IN_PROLOGUE 1
+
+/* OS fixes up EV5 data fault on prefetch. */
+#undef TARGET_FIXUP_EV5_PREFETCH
+#define TARGET_FIXUP_EV5_PREFETCH 1
+
+#undef WCHAR_TYPE
+#define WCHAR_TYPE "int"
+
+#ifdef SINGLE_LIBC
+#define OPTION_GLIBC (DEFAULT_LIBC == LIBC_GLIBC)
+#define OPTION_UCLIBC (DEFAULT_LIBC == LIBC_UCLIBC)
+#define OPTION_BIONIC (DEFAULT_LIBC == LIBC_BIONIC)
+#undef OPTION_MUSL
+#define OPTION_MUSL (DEFAULT_LIBC == LIBC_MUSL)
+#else
+#define OPTION_GLIBC (linux_libc == LIBC_GLIBC)
+#define OPTION_UCLIBC (linux_libc == LIBC_UCLIBC)
+#define OPTION_BIONIC (linux_libc == LIBC_BIONIC)
+#undef OPTION_MUSL
+#define OPTION_MUSL (linux_libc == LIBC_MUSL)
+#endif
+
+/* Determine what functions are present at the runtime;
+ this includes full c99 runtime and sincos. */
+#undef TARGET_LIBC_HAS_FUNCTION
+#define TARGET_LIBC_HAS_FUNCTION linux_libc_has_function
+
+#define TARGET_POSIX_IO
+
+/* Provide a STARTFILE_SPEC appropriate for ELF. Here we add the
+ (even more) magical crtbegin.o file which provides part of the
+ support for getting C++ file-scope static object constructed
+ before entering `main'. */
+
+#undef STARTFILE_SPEC
+#ifdef HAVE_LD_PIE
+#define STARTFILE_SPEC \
+ "%{!shared: %{pg|p:gcrt1.o%s;pie:Scrt1.o%s;:crt1.o%s}}\
+ crti.o%s %{static:crtbeginT.o%s;shared|pie:crtbeginS.o%s;:crtbegin.o%s}"
+#else
+#define STARTFILE_SPEC \
+ "%{!shared: %{pg|p:gcrt1.o%s;:crt1.o%s}}\
+ crti.o%s %{static:crtbeginT.o%s;shared|pie:crtbeginS.o%s;:crtbegin.o%s}"
+#endif
+
+/* Provide a ENDFILE_SPEC appropriate for ELF. Here we tack on the
+ magical crtend.o file which provides part of the support for
+ getting C++ file-scope static object constructed before entering
+ `main', followed by a normal ELF "finalizer" file, `crtn.o'. */
+
+#undef ENDFILE_SPEC
+#define ENDFILE_SPEC \
+ "%{Ofast|ffast-math|funsafe-math-optimizations:crtfastmath.o%s} \
+ %{shared|pie:crtendS.o%s;:crtend.o%s} crtn.o%s"
+
+#define LINK_GCC_C_SEQUENCE_SPEC \
+ "%{static|static-pie:--start-group} %G %{!nolibc:%L} \
+ %{static|static-pie:--end-group}%{!static:%{!static-pie:%G}}"
+
+/* Use --as-needed -lgcc_s for eh support. */
+#ifdef HAVE_LD_AS_NEEDED
+#define USE_LD_AS_NEEDED 1
+#endif
+
+/* Define if long doubles should be mangled as 'g'. */
+#define TARGET_ALTERNATE_LONG_DOUBLE_MANGLING
+
+/* -mcpu=native handling only makes sense with compiler running on
+ an Alpha chip. */
+#if defined(__alpha__) || defined(__alpha)
+extern const char *host_detect_local_cpu (int argc, const char **argv);
+# define EXTRA_SPEC_FUNCTIONS \
+ { "local_cpu_detect", host_detect_local_cpu },
+
+# define MCPU_MTUNE_NATIVE_SPECS \
+ " %{mcpu=native:%<mcpu=native %:local_cpu_detect(cpu)}" \
+ " %{mtune=native:%<mtune=native %:local_cpu_detect(tune)}"
+#else
+# define MCPU_MTUNE_NATIVE_SPECS ""
+#endif
+
+#define DRIVER_SELF_SPECS MCPU_MTUNE_NATIVE_SPECS
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