[thirdparty/gcc.git] / gcc / config / linux.h

/* Definitions for systems using the Linux kernel, with or without
   MMU, using ELF at the compiler level but possibly FLT for final
   linked executables and shared libraries in some no-MMU cases, and
   possibly with a choice of libc implementations.
   Copyright (C) 1995-2023 Free Software Foundation, Inc.
   Contributed by Eric Youngdale.
   Modified for stabs-in-ELF by H.J. Lu (hjl@lucon.org).

This file is part of GCC.

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 3, or (at your option)
any later version.

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.

Under Section 7 of GPL version 3, you are granted additional
permissions described in the GCC Runtime Library Exception, version
3.1, as published by the Free Software Foundation.

You should have received a copy of the GNU General Public License and
a copy of the GCC Runtime Library Exception along with this program;
see the files COPYING3 and COPYING.RUNTIME respectively.  If not, see
<http://www.gnu.org/licenses/>.  */

/* C libraries supported on Linux.  */
#ifdef SINGLE_LIBC
#define OPTION_GLIBC_P(opts)	(DEFAULT_LIBC == LIBC_GLIBC)
#define OPTION_UCLIBC_P(opts)	(DEFAULT_LIBC == LIBC_UCLIBC)
#define OPTION_BIONIC_P(opts)	(DEFAULT_LIBC == LIBC_BIONIC)
#undef OPTION_MUSL_P
#define OPTION_MUSL_P(opts)	(DEFAULT_LIBC == LIBC_MUSL)
#else
#define OPTION_GLIBC_P(opts)	((opts)->x_linux_libc == LIBC_GLIBC)
#define OPTION_UCLIBC_P(opts)	((opts)->x_linux_libc == LIBC_UCLIBC)
#define OPTION_BIONIC_P(opts)	((opts)->x_linux_libc == LIBC_BIONIC)
#undef OPTION_MUSL_P
#define OPTION_MUSL_P(opts)	((opts)->x_linux_libc == LIBC_MUSL)
#endif
#define OPTION_GLIBC		OPTION_GLIBC_P (&global_options)
#define OPTION_UCLIBC		OPTION_UCLIBC_P (&global_options)
#define OPTION_BIONIC		OPTION_BIONIC_P (&global_options)
#undef OPTION_MUSL
#define OPTION_MUSL		OPTION_MUSL_P (&global_options)

#define GNU_USER_TARGET_OS_CPP_BUILTINS()			\
    do {							\
	if (OPTION_GLIBC)					\
	  builtin_define ("__gnu_linux__");			\
	builtin_define_std ("linux");				\
	builtin_define_std ("unix");				\
	builtin_assert ("system=linux");			\
	builtin_assert ("system=unix");				\
	builtin_assert ("system=posix");			\
    } while (0)

/* Determine which dynamic linker to use depending on whether GLIBC or
   uClibc or Bionic or musl is the default C library and whether
   -muclibc or -mglibc or -mbionic or -mmusl has been passed to change
   the default.  */

#define CHOOSE_DYNAMIC_LINKER1(LIBC1, LIBC2, LIBC3, LIBC4, LD1, LD2, LD3, LD4)	\
  "%{" LIBC2 ":" LD2 ";:%{" LIBC3 ":" LD3 ";:%{" LIBC4 ":" LD4 ";:" LD1 "}}}"

#if DEFAULT_LIBC == LIBC_GLIBC
#define CHOOSE_DYNAMIC_LINKER(G, U, B, M) \
  CHOOSE_DYNAMIC_LINKER1 ("mglibc", "muclibc", "mbionic", "mmusl", G, U, B, M)
#elif DEFAULT_LIBC == LIBC_UCLIBC
#define CHOOSE_DYNAMIC_LINKER(G, U, B, M) \
  CHOOSE_DYNAMIC_LINKER1 ("muclibc", "mglibc", "mbionic", "mmusl", U, G, B, M)
#elif DEFAULT_LIBC == LIBC_BIONIC
#define CHOOSE_DYNAMIC_LINKER(G, U, B, M) \
  CHOOSE_DYNAMIC_LINKER1 ("mbionic", "mglibc", "muclibc", "mmusl", B, G, U, M)
#elif DEFAULT_LIBC == LIBC_MUSL
#define CHOOSE_DYNAMIC_LINKER(G, U, B, M) \
  CHOOSE_DYNAMIC_LINKER1 ("mmusl", "mglibc", "muclibc", "mbionic", M, G, U, B)
#else
#error "Unsupported DEFAULT_LIBC"
#endif /* DEFAULT_LIBC */

/* For most targets the following definitions suffice;
   GLIBC_DYNAMIC_LINKER must be defined for each target using them, or
   GLIBC_DYNAMIC_LINKER32 and GLIBC_DYNAMIC_LINKER64 for targets
   supporting both 32-bit and 64-bit compilation.  */
#define UCLIBC_DYNAMIC_LINKER "/lib/ld-uClibc.so.0"
#define UCLIBC_DYNAMIC_LINKER32 "/lib/ld-uClibc.so.0"
#define UCLIBC_DYNAMIC_LINKER64 "/lib/ld64-uClibc.so.0"
#define UCLIBC_DYNAMIC_LINKERX32 "/lib/ldx32-uClibc.so.0"
#define BIONIC_DYNAMIC_LINKER "/system/bin/linker"
#define BIONIC_DYNAMIC_LINKER32 "/system/bin/linker"
#define BIONIC_DYNAMIC_LINKER64 "/system/bin/linker64"
#define BIONIC_DYNAMIC_LINKERX32 "/system/bin/linkerx32"
/* Should be redefined for each target that supports musl.  */
#define MUSL_DYNAMIC_LINKER "/dev/null"
#define MUSL_DYNAMIC_LINKER32 "/dev/null"
#define MUSL_DYNAMIC_LINKER64 "/dev/null"
#define MUSL_DYNAMIC_LINKERX32 "/dev/null"

#define GNU_USER_DYNAMIC_LINKER						\
  CHOOSE_DYNAMIC_LINKER (GLIBC_DYNAMIC_LINKER, UCLIBC_DYNAMIC_LINKER,	\
			 BIONIC_DYNAMIC_LINKER, MUSL_DYNAMIC_LINKER)
#define GNU_USER_DYNAMIC_LINKER32					\
  CHOOSE_DYNAMIC_LINKER (GLIBC_DYNAMIC_LINKER32, UCLIBC_DYNAMIC_LINKER32, \
			 BIONIC_DYNAMIC_LINKER32, MUSL_DYNAMIC_LINKER32)
#define GNU_USER_DYNAMIC_LINKER64					\
  CHOOSE_DYNAMIC_LINKER (GLIBC_DYNAMIC_LINKER64, UCLIBC_DYNAMIC_LINKER64, \
			 BIONIC_DYNAMIC_LINKER64, MUSL_DYNAMIC_LINKER64)
#define GNU_USER_DYNAMIC_LINKERX32					\
  CHOOSE_DYNAMIC_LINKER (GLIBC_DYNAMIC_LINKERX32, UCLIBC_DYNAMIC_LINKERX32, \
			 BIONIC_DYNAMIC_LINKERX32, MUSL_DYNAMIC_LINKERX32)

/* Whether we have Bionic libc runtime */
#undef TARGET_HAS_BIONIC
#define TARGET_HAS_BIONIC (OPTION_BIONIC)

/* musl avoids problematic includes by rearranging the include directories.
 * Unfortunately, this is mostly duplicated from cppdefault.cc */
#if DEFAULT_LIBC == LIBC_MUSL
#define INCLUDE_DEFAULTS_MUSL_GPP			\
    { GPLUSPLUS_INCLUDE_DIR, "G++", 1, 1,		\
      GPLUSPLUS_INCLUDE_DIR_ADD_SYSROOT, 0 },		\
    { GPLUSPLUS_TOOL_INCLUDE_DIR, "G++", 1, 1,		\
      GPLUSPLUS_INCLUDE_DIR_ADD_SYSROOT, 1 },		\
    { GPLUSPLUS_BACKWARD_INCLUDE_DIR, "G++", 1, 1,	\
      GPLUSPLUS_INCLUDE_DIR_ADD_SYSROOT, 0 },

#ifdef LOCAL_INCLUDE_DIR
#define INCLUDE_DEFAULTS_MUSL_LOCAL			\
    { LOCAL_INCLUDE_DIR, 0, 0, 1, 1, 2 },		\
    { LOCAL_INCLUDE_DIR, 0, 0, 1, 1, 0 },
#else
#define INCLUDE_DEFAULTS_MUSL_LOCAL
#endif

#ifdef PREFIX_INCLUDE_DIR
#define INCLUDE_DEFAULTS_MUSL_PREFIX			\
    { PREFIX_INCLUDE_DIR, 0, 0, 1, 0, 0},
#else
#define INCLUDE_DEFAULTS_MUSL_PREFIX
#endif

#ifdef CROSS_INCLUDE_DIR
#define INCLUDE_DEFAULTS_MUSL_CROSS			\
    { CROSS_INCLUDE_DIR, "GCC", 0, 0, 0, 0},
#else
#define INCLUDE_DEFAULTS_MUSL_CROSS
#endif

#ifdef TOOL_INCLUDE_DIR
#define INCLUDE_DEFAULTS_MUSL_TOOL			\
    { TOOL_INCLUDE_DIR, "BINUTILS", 0, 1, 0, 0},
#else
#define INCLUDE_DEFAULTS_MUSL_TOOL
#endif

#ifdef NATIVE_SYSTEM_HEADER_DIR
#define INCLUDE_DEFAULTS_MUSL_NATIVE			\
    { NATIVE_SYSTEM_HEADER_DIR, 0, 0, 0, 1, 2 },	\
    { NATIVE_SYSTEM_HEADER_DIR, 0, 0, 0, 1, 0 },
#else
#define INCLUDE_DEFAULTS_MUSL_NATIVE
#endif

#if defined (CROSS_DIRECTORY_STRUCTURE) && !defined (TARGET_SYSTEM_ROOT)
# undef INCLUDE_DEFAULTS_MUSL_LOCAL
# define INCLUDE_DEFAULTS_MUSL_LOCAL
# undef INCLUDE_DEFAULTS_MUSL_NATIVE
# define INCLUDE_DEFAULTS_MUSL_NATIVE
#else
# undef INCLUDE_DEFAULTS_MUSL_CROSS
# define INCLUDE_DEFAULTS_MUSL_CROSS
#endif

#undef INCLUDE_DEFAULTS
#define INCLUDE_DEFAULTS				\
  {							\
    INCLUDE_DEFAULTS_MUSL_GPP				\
    INCLUDE_DEFAULTS_MUSL_LOCAL				\
    INCLUDE_DEFAULTS_MUSL_PREFIX			\
    INCLUDE_DEFAULTS_MUSL_CROSS				\
    INCLUDE_DEFAULTS_MUSL_TOOL				\
    INCLUDE_DEFAULTS_MUSL_NATIVE			\
    { GCC_INCLUDE_DIR, "GCC", 0, 1, 0, 0 },		\
    { 0, 0, 0, 0, 0, 0 }				\
  }
#endif

#if (DEFAULT_LIBC == LIBC_UCLIBC) && defined (SINGLE_LIBC) /* uClinux */
/* This is a *uclinux* target.  We don't define below macros to normal linux
   versions, because doing so would require *uclinux* targets to include
   linux.cc, linux-protos.h, linux.opt, etc.  We could, alternatively, add
   these files to *uclinux* targets, but that would only pollute option list
   (add -mglibc, etc.) without adding any useful support.  */

/* Define TARGET_LIBC_HAS_FUNCTION for *uclinux* targets to
   no_c99_libc_has_function, because uclibc does not, normally, have
   c99 runtime.  If, in special cases, uclibc does have c99 runtime,
   this should be defined to a new hook.  Also please note that for targets
   like *-linux-uclibc that similar check will also need to be added to
   linux_libc_has_function.  */
# undef TARGET_LIBC_HAS_FUNCTION
# define TARGET_LIBC_HAS_FUNCTION no_c99_libc_has_function

#else /* !uClinux, i.e., normal Linux */

/* 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

#endif
Commit	Line	Data
8e38461c JM	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.
aeee4812	5	Copyright (C) 1995-2023 Free Software Foundation, Inc.
9e2fc7c0	6	Contributed by Eric Youngdale.
e5e809f4	7	Modified for stabs-in-ELF by H.J. Lu (hjl@lucon.org).
9e2fc7c0	8
2a71dcad	9	This file is part of GCC.
9e2fc7c0	10
2a71dcad	11	GCC is free software; you can redistribute it and/or modify
9e2fc7c0	12	it under the terms of the GNU General Public License as published by
2f83c7d6	13	the Free Software Foundation; either version 3, or (at your option)
9e2fc7c0 RK	14	any later version.
9e2fc7c0 RK	15
2a71dcad	16	GCC is distributed in the hope that it will be useful,
9e2fc7c0 RK	17	but WITHOUT ANY WARRANTY; without even the implied warranty of
	18	MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
	19	GNU General Public License for more details.
	20
748086b7 JJ	21	Under Section 7 of GPL version 3, you are granted additional
	22	permissions described in the GCC Runtime Library Exception, version
	23	3.1, as published by the Free Software Foundation.
	24
	25	You should have received a copy of the GNU General Public License and
	26	a copy of the GCC Runtime Library Exception along with this program;
	27	see the files COPYING3 and COPYING.RUNTIME respectively. If not, see
2f83c7d6	28	<http://www.gnu.org/licenses/>. */
9e2fc7c0	29
74c70253	30	/* C libraries supported on Linux. */
b5a54c03	31	#ifdef SINGLE_LIBC
2c31a8be JJ	32	#define OPTION_GLIBC_P(opts) (DEFAULT_LIBC == LIBC_GLIBC)
	33	#define OPTION_UCLIBC_P(opts) (DEFAULT_LIBC == LIBC_UCLIBC)
	34	#define OPTION_BIONIC_P(opts) (DEFAULT_LIBC == LIBC_BIONIC)
	35	#undef OPTION_MUSL_P
	36	#define OPTION_MUSL_P(opts) (DEFAULT_LIBC == LIBC_MUSL)
b5a54c03	37	#else
2c31a8be JJ	38	#define OPTION_GLIBC_P(opts) ((opts)->x_linux_libc == LIBC_GLIBC)
	39	#define OPTION_UCLIBC_P(opts) ((opts)->x_linux_libc == LIBC_UCLIBC)
	40	#define OPTION_BIONIC_P(opts) ((opts)->x_linux_libc == LIBC_BIONIC)
	41	#undef OPTION_MUSL_P
	42	#define OPTION_MUSL_P(opts) ((opts)->x_linux_libc == LIBC_MUSL)
b5a54c03	43	#endif
2c31a8be JJ	44	#define OPTION_GLIBC OPTION_GLIBC_P (&global_options)
	45	#define OPTION_UCLIBC OPTION_UCLIBC_P (&global_options)
	46	#define OPTION_BIONIC OPTION_BIONIC_P (&global_options)
	47	#undef OPTION_MUSL
	48	#define OPTION_MUSL OPTION_MUSL_P (&global_options)
74c70253	49
107fd1c1	50	#define GNU_USER_TARGET_OS_CPP_BUILTINS() \
26b0ad13	51	do { \
74c70253 MK	52	if (OPTION_GLIBC) \
74c70253 MK	53	builtin_define ("__gnu_linux__"); \
26b0ad13 KG	54	builtin_define_std ("linux"); \
	55	builtin_define_std ("unix"); \
	56	builtin_assert ("system=linux"); \
	57	builtin_assert ("system=unix"); \
	58	builtin_assert ("system=posix"); \
	59	} while (0)
	60
464aea98	61	/* Determine which dynamic linker to use depending on whether GLIBC or
755658a5 GR	62	uClibc or Bionic or musl is the default C library and whether
	63	-muclibc or -mglibc or -mbionic or -mmusl has been passed to change
	64	the default. */
74c70253	65
755658a5 GR	66	#define CHOOSE_DYNAMIC_LINKER1(LIBC1, LIBC2, LIBC3, LIBC4, LD1, LD2, LD3, LD4) \
755658a5 GR	67	"%{" LIBC2 ":" LD2 ";:%{" LIBC3 ":" LD3 ";:%{" LIBC4 ":" LD4 ";:" LD1 "}}}"
74c70253 MK	68
74c70253 MK	69	#if DEFAULT_LIBC == LIBC_GLIBC
755658a5 GR	70	#define CHOOSE_DYNAMIC_LINKER(G, U, B, M) \
755658a5 GR	71	CHOOSE_DYNAMIC_LINKER1 ("mglibc", "muclibc", "mbionic", "mmusl", G, U, B, M)
74c70253	72	#elif DEFAULT_LIBC == LIBC_UCLIBC
755658a5 GR	73	#define CHOOSE_DYNAMIC_LINKER(G, U, B, M) \
755658a5 GR	74	CHOOSE_DYNAMIC_LINKER1 ("muclibc", "mglibc", "mbionic", "mmusl", U, G, B, M)
74c70253	75	#elif DEFAULT_LIBC == LIBC_BIONIC
755658a5 GR	76	#define CHOOSE_DYNAMIC_LINKER(G, U, B, M) \
	77	CHOOSE_DYNAMIC_LINKER1 ("mbionic", "mglibc", "muclibc", "mmusl", B, G, U, M)
	78	#elif DEFAULT_LIBC == LIBC_MUSL
	79	#define CHOOSE_DYNAMIC_LINKER(G, U, B, M) \
	80	CHOOSE_DYNAMIC_LINKER1 ("mmusl", "mglibc", "muclibc", "mbionic", M, G, U, B)
464aea98	81	#else
74c70253 MK	82	#error "Unsupported DEFAULT_LIBC"
74c70253 MK	83	#endif /* DEFAULT_LIBC */
464aea98	84
7bd85ce0 JM	85	/* For most targets the following definitions suffice;
	86	GLIBC_DYNAMIC_LINKER must be defined for each target using them, or
	87	GLIBC_DYNAMIC_LINKER32 and GLIBC_DYNAMIC_LINKER64 for targets
	88	supporting both 32-bit and 64-bit compilation. */
464aea98	89	#define UCLIBC_DYNAMIC_LINKER "/lib/ld-uClibc.so.0"
7bd85ce0 JM	90	#define UCLIBC_DYNAMIC_LINKER32 "/lib/ld-uClibc.so.0"
7bd85ce0 JM	91	#define UCLIBC_DYNAMIC_LINKER64 "/lib/ld64-uClibc.so.0"
f0ea7581	92	#define UCLIBC_DYNAMIC_LINKERX32 "/lib/ldx32-uClibc.so.0"
74c70253 MK	93	#define BIONIC_DYNAMIC_LINKER "/system/bin/linker"
	94	#define BIONIC_DYNAMIC_LINKER32 "/system/bin/linker"
	95	#define BIONIC_DYNAMIC_LINKER64 "/system/bin/linker64"
f0ea7581	96	#define BIONIC_DYNAMIC_LINKERX32 "/system/bin/linkerx32"
755658a5 GR	97	/* Should be redefined for each target that supports musl. */
	98	#define MUSL_DYNAMIC_LINKER "/dev/null"
	99	#define MUSL_DYNAMIC_LINKER32 "/dev/null"
	100	#define MUSL_DYNAMIC_LINKER64 "/dev/null"
	101	#define MUSL_DYNAMIC_LINKERX32 "/dev/null"
74c70253	102
107fd1c1	103	#define GNU_USER_DYNAMIC_LINKER \
74c70253	104	CHOOSE_DYNAMIC_LINKER (GLIBC_DYNAMIC_LINKER, UCLIBC_DYNAMIC_LINKER, \
755658a5	105	BIONIC_DYNAMIC_LINKER, MUSL_DYNAMIC_LINKER)
107fd1c1	106	#define GNU_USER_DYNAMIC_LINKER32 \
74c70253	107	CHOOSE_DYNAMIC_LINKER (GLIBC_DYNAMIC_LINKER32, UCLIBC_DYNAMIC_LINKER32, \
755658a5	108	BIONIC_DYNAMIC_LINKER32, MUSL_DYNAMIC_LINKER32)
107fd1c1	109	#define GNU_USER_DYNAMIC_LINKER64 \
74c70253	110	CHOOSE_DYNAMIC_LINKER (GLIBC_DYNAMIC_LINKER64, UCLIBC_DYNAMIC_LINKER64, \
755658a5	111	BIONIC_DYNAMIC_LINKER64, MUSL_DYNAMIC_LINKER64)
f0ea7581 L	112	#define GNU_USER_DYNAMIC_LINKERX32 \
f0ea7581 L	113	CHOOSE_DYNAMIC_LINKER (GLIBC_DYNAMIC_LINKERX32, UCLIBC_DYNAMIC_LINKERX32, \
755658a5	114	BIONIC_DYNAMIC_LINKERX32, MUSL_DYNAMIC_LINKERX32)
464aea98	115
4bd5abca SM	116	/* Whether we have Bionic libc runtime */
	117	#undef TARGET_HAS_BIONIC
	118	#define TARGET_HAS_BIONIC (OPTION_BIONIC)
d33d9e47	119
755658a5	120	/* musl avoids problematic includes by rearranging the include directories.
e53b6e56	121	* Unfortunately, this is mostly duplicated from cppdefault.cc */
755658a5 GR	122	#if DEFAULT_LIBC == LIBC_MUSL
	123	#define INCLUDE_DEFAULTS_MUSL_GPP \
	124	{ GPLUSPLUS_INCLUDE_DIR, "G++", 1, 1, \
	125	GPLUSPLUS_INCLUDE_DIR_ADD_SYSROOT, 0 }, \
	126	{ GPLUSPLUS_TOOL_INCLUDE_DIR, "G++", 1, 1, \
	127	GPLUSPLUS_INCLUDE_DIR_ADD_SYSROOT, 1 }, \
	128	{ GPLUSPLUS_BACKWARD_INCLUDE_DIR, "G++", 1, 1, \
	129	GPLUSPLUS_INCLUDE_DIR_ADD_SYSROOT, 0 },
	130
	131	#ifdef LOCAL_INCLUDE_DIR
	132	#define INCLUDE_DEFAULTS_MUSL_LOCAL \
	133	{ LOCAL_INCLUDE_DIR, 0, 0, 1, 1, 2 }, \
	134	{ LOCAL_INCLUDE_DIR, 0, 0, 1, 1, 0 },
	135	#else
	136	#define INCLUDE_DEFAULTS_MUSL_LOCAL
	137	#endif
	138
	139	#ifdef PREFIX_INCLUDE_DIR
	140	#define INCLUDE_DEFAULTS_MUSL_PREFIX \
	141	{ PREFIX_INCLUDE_DIR, 0, 0, 1, 0, 0},
	142	#else
	143	#define INCLUDE_DEFAULTS_MUSL_PREFIX
	144	#endif
	145
	146	#ifdef CROSS_INCLUDE_DIR
	147	#define INCLUDE_DEFAULTS_MUSL_CROSS \
	148	{ CROSS_INCLUDE_DIR, "GCC", 0, 0, 0, 0},
	149	#else
	150	#define INCLUDE_DEFAULTS_MUSL_CROSS
	151	#endif
	152
	153	#ifdef TOOL_INCLUDE_DIR
	154	#define INCLUDE_DEFAULTS_MUSL_TOOL \
	155	{ TOOL_INCLUDE_DIR, "BINUTILS", 0, 1, 0, 0},
	156	#else
	157	#define INCLUDE_DEFAULTS_MUSL_TOOL
	158	#endif
	159
	160	#ifdef NATIVE_SYSTEM_HEADER_DIR
	161	#define INCLUDE_DEFAULTS_MUSL_NATIVE \
	162	{ NATIVE_SYSTEM_HEADER_DIR, 0, 0, 0, 1, 2 }, \
	163	{ NATIVE_SYSTEM_HEADER_DIR, 0, 0, 0, 1, 0 },
	164	#else
	165	#define INCLUDE_DEFAULTS_MUSL_NATIVE
	166	#endif
	167
	168	#if defined (CROSS_DIRECTORY_STRUCTURE) && !defined (TARGET_SYSTEM_ROOT)
	169	# undef INCLUDE_DEFAULTS_MUSL_LOCAL
	170	# define INCLUDE_DEFAULTS_MUSL_LOCAL
	171	# undef INCLUDE_DEFAULTS_MUSL_NATIVE
	172	# define INCLUDE_DEFAULTS_MUSL_NATIVE
	173	#else
	174	# undef INCLUDE_DEFAULTS_MUSL_CROSS
	175	# define INCLUDE_DEFAULTS_MUSL_CROSS
	176	#endif
	177
	178	#undef INCLUDE_DEFAULTS
	179	#define INCLUDE_DEFAULTS \
	180	{ \
	181	INCLUDE_DEFAULTS_MUSL_GPP \
59010ede	182	INCLUDE_DEFAULTS_MUSL_LOCAL \
755658a5 GR	183	INCLUDE_DEFAULTS_MUSL_PREFIX \
	184	INCLUDE_DEFAULTS_MUSL_CROSS \
	185	INCLUDE_DEFAULTS_MUSL_TOOL \
	186	INCLUDE_DEFAULTS_MUSL_NATIVE \
	187	{ GCC_INCLUDE_DIR, "GCC", 0, 1, 0, 0 }, \
	188	{ 0, 0, 0, 0, 0, 0 } \
	189	}
	190	#endif
	191
3e9310f4 MK	192	#if (DEFAULT_LIBC == LIBC_UCLIBC) && defined (SINGLE_LIBC) /* uClinux */
	193	/* This is a uclinux target. We don't define below macros to normal linux
	194	versions, because doing so would require uclinux targets to include
e53b6e56	195	linux.cc, linux-protos.h, linux.opt, etc. We could, alternatively, add
3e9310f4 MK	196	these files to uclinux targets, but that would only pollute option list
	197	(add -mglibc, etc.) without adding any useful support. */
	198
	199	/* Define TARGET_LIBC_HAS_FUNCTION for uclinux targets to
	200	no_c99_libc_has_function, because uclibc does not, normally, have
	201	c99 runtime. If, in special cases, uclibc does have c99 runtime,
	202	this should be defined to a new hook. Also please note that for targets
	203	like *-linux-uclibc that similar check will also need to be added to
	204	linux_libc_has_function. */
	205	# undef TARGET_LIBC_HAS_FUNCTION
	206	# define TARGET_LIBC_HAS_FUNCTION no_c99_libc_has_function
	207
	208	#else /* !uClinux, i.e., normal Linux */
	209
d33d9e47 AI	210	/* Determine what functions are present at the runtime;
d33d9e47 AI	211	this includes full c99 runtime and sincos. */
3e9310f4 MK	212	# undef TARGET_LIBC_HAS_FUNCTION
	213	# define TARGET_LIBC_HAS_FUNCTION linux_libc_has_function
	214
	215	#endif