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/* Configuration for an i386 running MS-DOS with DJGPP.
Copyright (C) 1997-2022 Free Software Foundation, Inc.
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.
You should have received a copy of the GNU General Public License
along with GCC; see the file COPYING3. If not see
<http://www.gnu.org/licenses/>. */
/* Support generation of DWARF2 debugging info. */
#define DWARF2_DEBUGGING_INFO 1
#undef PREFERRED_DEBUGGING_TYPE
#define PREFERRED_DEBUGGING_TYPE DWARF2_DEBUG
#undef BSS_SECTION_ASM_OP
#define BSS_SECTION_ASM_OP "\t.section\t.bss"
/* Define the name of the .data section. */
#undef DATA_SECTION_ASM_OP
#define DATA_SECTION_ASM_OP "\t.section .data"
/* Define the name of the .ident op. */
#undef TARGET_ASM_OUTPUT_IDENT
#define TARGET_ASM_OUTPUT_IDENT default_asm_output_ident_directive
/* Enable alias attribute support. */
#ifndef SET_ASM_OP
#define SET_ASM_OP "\t.set\t"
#endif
/* Define the name of the .text section. */
#undef TEXT_SECTION_ASM_OP
#define TEXT_SECTION_ASM_OP "\t.section .text"
#define TARGET_OS_CPP_BUILTINS() \
do \
{ \
if (!flag_iso) \
builtin_define_with_int_value ("DJGPP",2); \
builtin_define_with_int_value ("__DJGPP",2); \
builtin_define_with_int_value ("__DJGPP__",2); \
builtin_define_std ("MSDOS"); \
builtin_define_std ("GO32"); \
builtin_define_std ("unix"); \
builtin_assert ("system=msdos"); \
} \
while (0)
#undef CPP_SPEC
#define CPP_SPEC "-remap %{posix:-D_POSIX_SOURCE}"
#undef POST_LINK_SPEC
#define POST_LINK_SPEC "stubify %{v} %{o*:%*} %{!o*:a.out}"
/* Always just link in 'libc.a'. */
#undef LIB_SPEC
#define LIB_SPEC "-lc"
/* Pick the right startup code depending on the -pg flag. */
#undef STARTFILE_SPEC
#define STARTFILE_SPEC "%{pg:gcrt0.o%s}%{!pg:crt0.o%s}"
/* Switch into a generic section. */
#define TARGET_ASM_NAMED_SECTION i386_djgpp_asm_named_section
/* This is how to output an assembler line
that says to advance the location counter
to a multiple of 2**LOG bytes. */
#undef ASM_OUTPUT_ALIGN
#define ASM_OUTPUT_ALIGN(FILE,LOG) \
if ((LOG) != 0) fprintf ((FILE), "\t.p2align %d\n", LOG)
/* This is how to output a global symbol in the BSS section. */
#undef ASM_OUTPUT_ALIGNED_BSS
#define ASM_OUTPUT_ALIGNED_BSS(FILE, DECL, NAME, SIZE, ALIGN) \
asm_output_aligned_bss ((FILE), (DECL), (NAME), (SIZE), (ALIGN))
/* Write the extra assembler code needed to declare a function properly. */
#ifndef ASM_DECLARE_FUNCTION_NAME
#define ASM_DECLARE_FUNCTION_NAME(FILE, NAME, DECL) \
do \
{ \
ASM_OUTPUT_FUNCTION_LABEL (FILE, NAME, DECL); \
} \
while (0)
#endif
/* This is how to tell assembler that a symbol is weak */
#undef ASM_WEAKEN_LABEL
#define ASM_WEAKEN_LABEL(FILE,NAME) \
do { fputs ("\t.weak\t", FILE); assemble_name (FILE, NAME); \
fputc ('\n', FILE); } while (0)
/* djgpp automatically calls its own version of __main, so don't define one
in libgcc, nor call one in main(). */
#define HAS_INIT_SECTION
#undef TARGET_LIBC_HAS_FUNCTION
#define TARGET_LIBC_HAS_FUNCTION no_c99_libc_has_function
/* Definitions for types and sizes. Wide characters are 16-bits long so
Win32 compiler add-ons will be wide character compatible. */
#undef WCHAR_TYPE_SIZE
#define WCHAR_TYPE_SIZE 16
#undef WCHAR_TYPE
#define WCHAR_TYPE "short unsigned int"
#undef WINT_TYPE
#define WINT_TYPE "int"
#undef SIZE_TYPE
#define SIZE_TYPE "long unsigned int"
#undef PTRDIFF_TYPE
#define PTRDIFF_TYPE "int"
#undef DBX_REGISTER_NUMBER
#define DBX_REGISTER_NUMBER(n) svr4_dbx_register_map[n]
/* Default to pcc-struct-return. */
#define DEFAULT_PCC_STRUCT_RETURN 1
/* Ignore (with warning) -fPIC for DJGPP */
#undef SUBTARGET_OVERRIDE_OPTIONS
#define SUBTARGET_OVERRIDE_OPTIONS \
do { \
if (flag_pic) \
{ \
fnotice(stdout, "-f%s ignored (not supported for DJGPP)\n", \
(flag_pic > 1) ? "PIC" : "pic"); \
flag_pic = 0; \
} \
\
/* Don't emit DWARF3/4 unless specifically selected. */ \
/* DWARF3/4 currently does not work for DJGPP. */ \
if (!OPTION_SET_P (dwarf_version)) \
dwarf_version = 2; \
\
} \
while (0)
/* Support for C++ templates. */
#undef MAKE_DECL_ONE_ONLY
#define MAKE_DECL_ONE_ONLY(DECL) (DECL_WEAK (DECL) = 1)
#undef TARGET_COFF
#define TARGET_COFF 1
/* Kludge because of missing COFF support for early LTO debug. */
#undef TARGET_ASM_LTO_START
#define TARGET_ASM_LTO_START i386_djgpp_asm_lto_start
#undef TARGET_ASM_LTO_END
#define TARGET_ASM_LTO_END i386_djgpp_asm_lto_end
/* Function protypes for gcc/i386/djgpp.cc */
void
i386_djgpp_asm_named_section(const char *name, unsigned int flags,
tree decl);
void i386_djgpp_asm_lto_start (void);
void i386_djgpp_asm_lto_end (void);
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