gcc/config/sparc/linux.h - gcc - Git at Google

 /* Definitions for SPARC running Linux-based GNU systems with ELF.
    Copyright (C) 1996, 1997, 1998, 1999, 2000, 2002, 2003, 2004, 2005
    Free Software Foundation, Inc.
    Contributed by Eddie C. Dost (ecd@skynet.be)

 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 2, 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.

 You should have received a copy of the GNU General Public License
 along with GCC; see the file COPYING.  If not, write to
 the Free Software Foundation, 51 Franklin Street, Fifth Floor,
 Boston, MA 02110-1301, USA.  */

 #define TARGET_OS_CPP_BUILTINS()		\
   do						\
     {						\
 	builtin_define_std ("unix");		\
 	builtin_define_std ("linux");		\
 	builtin_define ("__gnu_linux__");	\
 	builtin_assert ("system=linux");	\
 	builtin_assert ("system=unix");		\
 	builtin_assert ("system=posix");	\
 	if (flag_pic)				\
 	  {					\
 		builtin_define ("__PIC__");	\
 		builtin_define ("__pic__");	\
 	  }					\
     }						\
   while (0)

 /* Don't assume anything about the header files.  */
 #define NO_IMPLICIT_EXTERN_C

 #undef MD_EXEC_PREFIX
 #undef MD_STARTFILE_PREFIX

 /* Provide a STARTFILE_SPEC appropriate for GNU/Linux.  Here we add
    the GNU/Linux magical crtbegin.o file (see crtstuff.c) which
    provides part of the support for getting C++ file-scope static
    object constructed before entering `main'.  */

 #undef  STARTFILE_SPEC
 #if defined 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 GNU/Linux.  Here we tack on
    the GNU/Linux magical crtend.o file (see crtstuff.c) which
    provides part of the support for getting C++ file-scope static
    object constructed before entering `main', followed by a normal
    GNU/Linux "finalizer" file, `crtn.o'.  */

 #undef  ENDFILE_SPEC
 #define ENDFILE_SPEC \
   "%{ffast-math|funsafe-math-optimizations:crtfastmath.o%s} \
    %{shared|pie:crtendS.o%s;:crtend.o%s} crtn.o%s"

 /* This is for -profile to use -lc_p instead of -lc.  */
 #undef	CC1_SPEC
 #define	CC1_SPEC "%{profile:-p} \
 %{sun4:} %{target:} \
 %{mcypress:-mcpu=cypress} \
 %{msparclite:-mcpu=sparclite} %{mf930:-mcpu=f930} %{mf934:-mcpu=f934} \
 %{mv8:-mcpu=v8} %{msupersparc:-mcpu=supersparc} \
 "

 /* The GNU C++ standard library requires that these macros be defined.  */
 #undef CPLUSPLUS_CPP_SPEC
 #define CPLUSPLUS_CPP_SPEC "-D_GNU_SOURCE %(cpp)"

 #undef TARGET_VERSION
 #define TARGET_VERSION fprintf (stderr, " (sparc GNU/Linux with ELF)");

 #undef SIZE_TYPE
 #define SIZE_TYPE "unsigned int"

 #undef PTRDIFF_TYPE
 #define PTRDIFF_TYPE "int"

 #undef WCHAR_TYPE
 #define WCHAR_TYPE "int"

 #undef WCHAR_TYPE_SIZE
 #define WCHAR_TYPE_SIZE 32

 #undef CPP_SUBTARGET_SPEC
 #define CPP_SUBTARGET_SPEC \
 "%{posix:-D_POSIX_SOURCE} \
 %{pthread:-D_REENTRANT} %{mlong-double-128:-D__LONG_DOUBLE_128__}"

 #undef LIB_SPEC
 #define LIB_SPEC \
   "%{pthread:-lpthread} \
    %{shared:-lc} \
    %{!shared:%{mieee-fp:-lieee} %{profile:-lc_p}%{!profile:-lc}}"

 /* Provide a LINK_SPEC appropriate for GNU/Linux.  Here we provide support
    for the special GCC options -static and -shared, which allow us to
    link things in one of these three modes by applying the appropriate
    combinations of options at link-time. We like to support here for
    as many of the other GNU linker options as possible. But I don't
    have the time to search for those flags. I am sure how to add
    support for -soname shared_object_name. H.J.

    I took out %{v:%{!V:-V}}. It is too much :-(. They can use
    -Wl,-V.

    When the -shared link option is used a final link is not being
    done.  */

 /* If ELF is the default format, we should not use /lib/elf.  */

 #undef  LINK_SPEC
 #define LINK_SPEC "-m elf32_sparc -Y P,/usr/lib %{shared:-shared} \
   %{!mno-relax:%{!r:-relax}} \
   %{!shared: \
     %{!ibcs: \
       %{!static: \
         %{rdynamic:-export-dynamic} \
         %{!dynamic-linker:-dynamic-linker /lib/ld-linux.so.2}} \
         %{static:-static}}}"

 /* The sun bundled assembler doesn't accept -Yd, (and neither does gas).
    It's safe to pass -s always, even if -g is not used.  */
 #undef ASM_SPEC
 #define ASM_SPEC \
   "%{V} %{v:%{!V:-V}} %{!Qn:-Qy} %{n} %{T} %{Ym,*} %{Wa,*:%*} -s \
    %{fpic|fPIC|fpie|fPIE:-K PIC} %(asm_cpu) %(asm_relax)"

 #undef ASM_OUTPUT_ALIGNED_LOCAL
 #define ASM_OUTPUT_ALIGNED_LOCAL(FILE, NAME, SIZE, ALIGN)		\
 do {									\
   fputs ("\t.local\t", (FILE));		\
   assemble_name ((FILE), (NAME));					\
   putc ('\n', (FILE));							\
   ASM_OUTPUT_ALIGNED_COMMON (FILE, NAME, SIZE, ALIGN);			\
 } while (0)

 #undef COMMON_ASM_OP
 #define COMMON_ASM_OP "\t.common\t"

 #undef  LOCAL_LABEL_PREFIX
 #define LOCAL_LABEL_PREFIX  "."

 /* This is how to store into the string LABEL
    the symbol_ref name of an internal numbered label where
    PREFIX is the class of label and NUM is the number within the class.
    This is suitable for output with `assemble_name'.  */

 #undef  ASM_GENERATE_INTERNAL_LABEL
 #define ASM_GENERATE_INTERNAL_LABEL(LABEL,PREFIX,NUM)	\
   sprintf (LABEL, "*.L%s%ld", PREFIX, (long)(NUM))


 /* Define for support of TFmode long double.
    SPARC ABI says that long double is 4 words.  */
 #define LONG_DOUBLE_TYPE_SIZE (TARGET_LONG_DOUBLE_128 ? 128 : 64)

 /* Define this to set long double type size to use in libgcc2.c, which can
    not depend on target_flags.  */
 #ifdef __LONG_DOUBLE_128__
 #define LIBGCC2_LONG_DOUBLE_TYPE_SIZE 128
 #else
 #define LIBGCC2_LONG_DOUBLE_TYPE_SIZE 64
 #endif

 #undef DITF_CONVERSION_LIBFUNCS
 #define DITF_CONVERSION_LIBFUNCS 1

 #if defined(HAVE_LD_EH_FRAME_HDR)
 #define LINK_EH_SPEC "%{!static:--eh-frame-hdr} "
 #endif

 #ifdef HAVE_AS_TLS
 #undef TARGET_SUN_TLS
 #undef TARGET_GNU_TLS
 #define TARGET_SUN_TLS 0
 #define TARGET_GNU_TLS 1
 #endif

 /* Don't be different from other Linux platforms in this regard.  */
 #define HANDLE_PRAGMA_PACK_PUSH_POP

 /* We use GNU ld so undefine this so that attribute((init_priority)) works.  */
 #undef CTORS_SECTION_ASM_OP
 #undef DTORS_SECTION_ASM_OP

 /* Determine whether the entire c99 runtime is present in the
    runtime library.  */
 #define TARGET_C99_FUNCTIONS 1

 #define TARGET_POSIX_IO

 #undef LINK_GCC_C_SEQUENCE_SPEC
 #define LINK_GCC_C_SEQUENCE_SPEC \
   "%{static:--start-group} %G %L %{static:--end-group}%{!static:%G}"

 /* Use --as-needed -lgcc_s for eh support.  */
 #ifdef HAVE_LD_AS_NEEDED
 #define USE_LD_AS_NEEDED 1
 #endif

 #define MD_UNWIND_SUPPORT "config/sparc/linux-unwind.h"

 /* Linux currently uses RMO in uniprocessor mode, which is equivalent to
    TMO, and TMO in multiprocessor mode.  But they reserve the right to
    change their minds.  */
 #undef SPARC_RELAXED_ORDERING
 #define SPARC_RELAXED_ORDERING true

 #undef NEED_INDICATE_EXEC_STACK
 #define NEED_INDICATE_EXEC_STACK 1

 #ifdef TARGET_LIBC_PROVIDES_SSP
 /* sparc glibc provides __stack_chk_guard in [%g7 + 0x14].  */
 #define TARGET_THREAD_SSP_OFFSET	0x14
 #endif

 /* Define if long doubles should be mangled as 'g'.  */
 #define TARGET_ALTERNATE_LONG_DOUBLE_MANGLING
	/* Definitions for SPARC running Linux-based GNU systems with ELF.
	Copyright (C) 1996, 1997, 1998, 1999, 2000, 2002, 2003, 2004, 2005
	Free Software Foundation, Inc.
	Contributed by Eddie C. Dost (ecd@skynet.be)

	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 2, 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.

	You should have received a copy of the GNU General Public License
	along with GCC; see the file COPYING. If not, write to
	the Free Software Foundation, 51 Franklin Street, Fifth Floor,
	Boston, MA 02110-1301, USA. */

	#define TARGET_OS_CPP_BUILTINS() \
	do \
	{ \
	builtin_define_std ("unix"); \
	builtin_define_std ("linux"); \
	builtin_define ("__gnu_linux__"); \
	builtin_assert ("system=linux"); \
	builtin_assert ("system=unix"); \
	builtin_assert ("system=posix"); \
	if (flag_pic) \
	{ \
	builtin_define ("__PIC__"); \
	builtin_define ("__pic__"); \
	} \
	} \
	while (0)

	/* Don't assume anything about the header files. */
	#define NO_IMPLICIT_EXTERN_C

	#undef MD_EXEC_PREFIX
	#undef MD_STARTFILE_PREFIX

	/* Provide a STARTFILE_SPEC appropriate for GNU/Linux. Here we add
	the GNU/Linux magical crtbegin.o file (see crtstuff.c) which
	provides part of the support for getting C++ file-scope static
	object constructed before entering `main'. */

	#undef STARTFILE_SPEC
	#if defined 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 GNU/Linux. Here we tack on
	the GNU/Linux magical crtend.o file (see crtstuff.c) which
	provides part of the support for getting C++ file-scope static
	object constructed before entering `main', followed by a normal
	GNU/Linux "finalizer" file, `crtn.o'. */

	#undef ENDFILE_SPEC
	#define ENDFILE_SPEC \
	"%{ffast-math\|funsafe-math-optimizations:crtfastmath.o%s} \
	%{shared\|pie:crtendS.o%s;:crtend.o%s} crtn.o%s"

	/* This is for -profile to use -lc_p instead of -lc. */
	#undef CC1_SPEC
	#define CC1_SPEC "%{profile:-p} \
	%{sun4:} %{target:} \
	%{mcypress:-mcpu=cypress} \
	%{msparclite:-mcpu=sparclite} %{mf930:-mcpu=f930} %{mf934:-mcpu=f934} \
	%{mv8:-mcpu=v8} %{msupersparc:-mcpu=supersparc} \
	"

	/* The GNU C++ standard library requires that these macros be defined. */
	#undef CPLUSPLUS_CPP_SPEC
	#define CPLUSPLUS_CPP_SPEC "-D_GNU_SOURCE %(cpp)"

	#undef TARGET_VERSION
	#define TARGET_VERSION fprintf (stderr, " (sparc GNU/Linux with ELF)");

	#undef SIZE_TYPE
	#define SIZE_TYPE "unsigned int"

	#undef PTRDIFF_TYPE
	#define PTRDIFF_TYPE "int"

	#undef WCHAR_TYPE
	#define WCHAR_TYPE "int"

	#undef WCHAR_TYPE_SIZE
	#define WCHAR_TYPE_SIZE 32

	#undef CPP_SUBTARGET_SPEC
	#define CPP_SUBTARGET_SPEC \
	"%{posix:-D_POSIX_SOURCE} \
	%{pthread:-D_REENTRANT} %{mlong-double-128:-D__LONG_DOUBLE_128__}"

	#undef LIB_SPEC
	#define LIB_SPEC \
	"%{pthread:-lpthread} \
	%{shared:-lc} \
	%{!shared:%{mieee-fp:-lieee} %{profile:-lc_p}%{!profile:-lc}}"

	/* Provide a LINK_SPEC appropriate for GNU/Linux. Here we provide support
	for the special GCC options -static and -shared, which allow us to
	link things in one of these three modes by applying the appropriate
	combinations of options at link-time. We like to support here for
	as many of the other GNU linker options as possible. But I don't
	have the time to search for those flags. I am sure how to add
	support for -soname shared_object_name. H.J.

	I took out %{v:%{!V:-V}}. It is too much :-(. They can use
	-Wl,-V.

	When the -shared link option is used a final link is not being
	done. */

	/* If ELF is the default format, we should not use /lib/elf. */

	#undef LINK_SPEC
	#define LINK_SPEC "-m elf32_sparc -Y P,/usr/lib %{shared:-shared} \
	%{!mno-relax:%{!r:-relax}} \
	%{!shared: \
	%{!ibcs: \
	%{!static: \
	%{rdynamic:-export-dynamic} \
	%{!dynamic-linker:-dynamic-linker /lib/ld-linux.so.2}} \
	%{static:-static}}}"

	/* The sun bundled assembler doesn't accept -Yd, (and neither does gas).
	It's safe to pass -s always, even if -g is not used. */
	#undef ASM_SPEC
	#define ASM_SPEC \
	"%{V} %{v:%{!V:-V}} %{!Qn:-Qy} %{n} %{T} %{Ym,} %{Wa,:%*} -s \
	%{fpic\|fPIC\|fpie\|fPIE:-K PIC} %(asm_cpu) %(asm_relax)"

	#undef ASM_OUTPUT_ALIGNED_LOCAL
	#define ASM_OUTPUT_ALIGNED_LOCAL(FILE, NAME, SIZE, ALIGN) \
	do { \
	fputs ("\t.local\t", (FILE)); \
	assemble_name ((FILE), (NAME)); \
	putc ('\n', (FILE)); \
	ASM_OUTPUT_ALIGNED_COMMON (FILE, NAME, SIZE, ALIGN); \
	} while (0)

	#undef COMMON_ASM_OP
	#define COMMON_ASM_OP "\t.common\t"

	#undef LOCAL_LABEL_PREFIX
	#define LOCAL_LABEL_PREFIX "."

	/* This is how to store into the string LABEL
	the symbol_ref name of an internal numbered label where
	PREFIX is the class of label and NUM is the number within the class.
	This is suitable for output with `assemble_name'. */

	#undef ASM_GENERATE_INTERNAL_LABEL
	#define ASM_GENERATE_INTERNAL_LABEL(LABEL,PREFIX,NUM) \
	sprintf (LABEL, "*.L%s%ld", PREFIX, (long)(NUM))


	/* Define for support of TFmode long double.
	SPARC ABI says that long double is 4 words. */
	#define LONG_DOUBLE_TYPE_SIZE (TARGET_LONG_DOUBLE_128 ? 128 : 64)

	/* Define this to set long double type size to use in libgcc2.c, which can
	not depend on target_flags. */
	#ifdef __LONG_DOUBLE_128__
	#define LIBGCC2_LONG_DOUBLE_TYPE_SIZE 128
	#else
	#define LIBGCC2_LONG_DOUBLE_TYPE_SIZE 64
	#endif

	#undef DITF_CONVERSION_LIBFUNCS
	#define DITF_CONVERSION_LIBFUNCS 1

	#if defined(HAVE_LD_EH_FRAME_HDR)
	#define LINK_EH_SPEC "%{!static:--eh-frame-hdr} "
	#endif

	#ifdef HAVE_AS_TLS
	#undef TARGET_SUN_TLS
	#undef TARGET_GNU_TLS
	#define TARGET_SUN_TLS 0
	#define TARGET_GNU_TLS 1
	#endif

	/* Don't be different from other Linux platforms in this regard. */
	#define HANDLE_PRAGMA_PACK_PUSH_POP

	/* We use GNU ld so undefine this so that attribute((init_priority)) works. */
	#undef CTORS_SECTION_ASM_OP
	#undef DTORS_SECTION_ASM_OP

	/* Determine whether the entire c99 runtime is present in the
	runtime library. */
	#define TARGET_C99_FUNCTIONS 1

	#define TARGET_POSIX_IO

	#undef LINK_GCC_C_SEQUENCE_SPEC
	#define LINK_GCC_C_SEQUENCE_SPEC \
	"%{static:--start-group} %G %L %{static:--end-group}%{!static:%G}"

	/* Use --as-needed -lgcc_s for eh support. */
	#ifdef HAVE_LD_AS_NEEDED
	#define USE_LD_AS_NEEDED 1
	#endif

	#define MD_UNWIND_SUPPORT "config/sparc/linux-unwind.h"

	/* Linux currently uses RMO in uniprocessor mode, which is equivalent to
	TMO, and TMO in multiprocessor mode. But they reserve the right to
	change their minds. */
	#undef SPARC_RELAXED_ORDERING
	#define SPARC_RELAXED_ORDERING true

	#undef NEED_INDICATE_EXEC_STACK
	#define NEED_INDICATE_EXEC_STACK 1

	#ifdef TARGET_LIBC_PROVIDES_SSP
	/* sparc glibc provides __stack_chk_guard in [%g7 + 0x14]. */
	#define TARGET_THREAD_SSP_OFFSET 0x14
	#endif

	/* Define if long doubles should be mangled as 'g'. */
	#define TARGET_ALTERNATE_LONG_DOUBLE_MANGLING