1 /* Configuration for an i386 running MS-DOS with DJGPP.
2 Copyright (C) 1997, 1998, 1999, 2000, 2001, 2002
3 Free Software Foundation, Inc.
5 This file is part of GNU CC.
7 GNU CC is free software; you can redistribute it and/or modify
8 it under the terms of the GNU General Public License as published by
9 the Free Software Foundation; either version 2, or (at your option)
12 GNU CC is distributed in the hope that it will be useful,
13 but WITHOUT ANY WARRANTY; without even the implied warranty of
14 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15 GNU General Public License for more details.
17 You should have received a copy of the GNU General Public License
18 along with GNU CC; see the file COPYING. If not, write to
19 the Free Software Foundation, 59 Temple Place - Suite 330,
20 Boston, MA 02111-1307, USA. */
22 /* Support generation of DWARF2 debugging info. */
23 #define DWARF2_DEBUGGING_INFO
25 /* Don't assume anything about the header files. */
26 #define NO_IMPLICIT_EXTERN_C
28 #define HANDLE_SYSV_PRAGMA
30 /* Enable parsing of #pragma pack(push,<n>) and #pragma pack(pop). */
31 #define HANDLE_PRAGMA_PACK_PUSH_POP 1
33 #include "i386/unix.h"
37 /* If defined, a C expression whose value is a string containing the
38 assembler operation to identify the following data as
39 uninitialized global data. If not defined, and neither
40 `ASM_OUTPUT_BSS' nor `ASM_OUTPUT_ALIGNED_BSS' are defined,
41 uninitialized global data will be output in the data section if
42 `-fno-common' is passed, otherwise `ASM_OUTPUT_COMMON' will be
44 #undef BSS_SECTION_ASM_OP
45 #define BSS_SECTION_ASM_OP "\t.section\t.bss"
47 /* Define the name of the .data section. */
48 #undef DATA_SECTION_ASM_OP
49 #define DATA_SECTION_ASM_OP "\t.section .data"
51 /* Define the name of the .ident op. */
53 #define IDENT_ASM_OP "\t.ident\t"
55 /* Enable alias attribute support. */
57 #define SET_ASM_OP "\t.set\t"
60 /* Define the name of the .text section. */
61 #undef TEXT_SECTION_ASM_OP
62 #define TEXT_SECTION_ASM_OP "\t.section .text"
64 /* Define standard DJGPP installation paths. */
65 /* We override default /usr or /usr/local part with /dev/env/DJDIR which */
66 /* points to actual DJGPP instalation directory. */
68 /* Standard include directory */
69 #undef STANDARD_INCLUDE_DIR
70 #define STANDARD_INCLUDE_DIR "/dev/env/DJDIR/include/"
72 /* Search for as.exe and ld.exe in DJGPP's binary directory. */
74 #define MD_EXEC_PREFIX "/dev/env/DJDIR/bin/"
76 /* Standard DJGPP library and startup files */
77 #undef MD_STARTFILE_PREFIX
78 #define MD_STARTFILE_PREFIX "/dev/env/DJDIR/lib/"
80 /* Correctly handle absolute filename detection in cp/xref.c */
81 #define FILE_NAME_ABSOLUTE_P(NAME) \
82 (((NAME)[0] == '/') || ((NAME)[0] == '\\') || \
83 (((NAME)[0] >= 'A') && ((NAME)[0] <= 'z') && ((NAME)[1] == ':')))
85 #define TARGET_OS_CPP_BUILTINS() \
88 builtin_define_std ("MSDOS"); \
89 builtin_define_std ("GO32"); \
90 builtin_assert ("system=msdos"); \
94 /* Include <sys/version.h> so __DJGPP__ and __DJGPP_MINOR__ are defined. */
96 #define CPP_SPEC "-remap %{posix:-D_POSIX_SOURCE} \
97 -imacros %s../include/sys/version.h"
99 /* We need to override link_command_spec in gcc.c so support -Tdjgpp.djl.
100 This cannot be done in LINK_SPECS as that LINK_SPECS is processed
101 before library search directories are known by the linker.
102 This avoids problems when specs file is not available. An alternate way,
103 suggested by Robert Hoehne, is to use SUBTARGET_EXTRA_SPECS instead.
106 #undef LINK_COMMAND_SPEC
107 #define LINK_COMMAND_SPEC \
109 %{!c:%{!M:%{!MM:%{!E:%{!S:%(linker) %l %X %{o*} %{A} %{d} %{e*} %{m} %{N} %{n} \
110 \t%{r} %{s} %{t} %{u*} %{x} %{z} %{Z}\
111 \t%{!A:%{!nostdlib:%{!nostartfiles:%S}}}\
112 \t%{static:} %{L*} %D %o\
113 \t%{!nostdlib:%{!nodefaultlibs:%G %L %G}}\
114 \t%{!A:%{!nostdlib:%{!nostartfiles:%E}}}\
115 \t-Tdjgpp.djl %{T*}}}}}}}\n\
116 %{!c:%{!M:%{!MM:%{!E:%{!S:stubify %{v} %{o*:%*} %{!o*:a.out} }}}}}"
118 /* Always just link in 'libc.a'. */
120 #define LIB_SPEC "-lc"
122 /* Pick the right startup code depending on the -pg flag. */
123 #undef STARTFILE_SPEC
124 #define STARTFILE_SPEC "%{pg:gcrt0.o%s}%{!pg:crt0.o%s}"
126 /* Make sure that gcc will not look for .h files in /usr/local/include
127 unless user explicitly requests it. */
128 #undef LOCAL_INCLUDE_DIR
130 /* Switch into a generic section. */
131 #define TARGET_ASM_NAMED_SECTION default_coff_asm_named_section
133 /* Output at beginning of assembler file. */
134 /* The .file command should always begin the output. */
136 #undef ASM_FILE_START
137 #define ASM_FILE_START(FILE) \
139 output_file_directive (FILE, main_input_filename); \
142 /* This is how to output an assembler line
143 that says to advance the location counter
144 to a multiple of 2**LOG bytes. */
146 #undef ASM_OUTPUT_ALIGN
147 #define ASM_OUTPUT_ALIGN(FILE,LOG) \
148 if ((LOG) != 0) fprintf ((FILE), "\t.p2align %d\n", LOG)
150 /* This is how to output a global symbol in the BSS section. */
151 #undef ASM_OUTPUT_ALIGNED_BSS
152 #define ASM_OUTPUT_ALIGNED_BSS(FILE, DECL, NAME, SIZE, ALIGN) \
153 asm_output_aligned_bss ((FILE), (DECL), (NAME), (SIZE), (ALIGN))
155 /* This is how to tell assembler that a symbol is weak */
156 #undef ASM_WEAKEN_LABEL
157 #define ASM_WEAKEN_LABEL(FILE,NAME) \
158 do { fputs ("\t.weak\t", FILE); assemble_name (FILE, NAME); \
159 fputc ('\n', FILE); } while (0)
161 /* djgpp automatically calls its own version of __main, so don't define one
162 in libgcc, nor call one in main(). */
163 #define HAS_INIT_SECTION
165 /* Definitions for types and sizes. Wide characters are 16-bits long so
166 Win32 compiler add-ons will be wide character compatible. */
167 #undef WCHAR_TYPE_SIZE
168 #define WCHAR_TYPE_SIZE 16
171 #define WCHAR_TYPE "short unsigned int"
174 #define WINT_TYPE "int"
177 #define SIZE_TYPE "long unsigned int"
180 #define PTRDIFF_TYPE "int"
182 /* Used to be defined in xm-djgpp.h, but moved here for cross-compilers. */
183 #define LIBSTDCXX "-lstdcxx"
185 /* -mbnu210 is now ignored and obsolete. It was used to enable support for
186 weak symbols, and .gnu.linkonce support. */
188 #define MASK_BNU210 (0x40000000)
190 #define TARGET_VERSION fprintf (stderr, " (80386, MS-DOS DJGPP)");
192 #undef SUBTARGET_SWITCHES
193 #define SUBTARGET_SWITCHES \
194 { "no-bnu210", -MASK_BNU210, "Ignored (obsolete)" }, \
195 { "bnu210", MASK_BNU210, "Ignored (obsolete)" },
197 /* Warn that -mbnu210 is now obsolete. */
198 #undef SUBTARGET_OVERRIDE_OPTIONS
199 #define SUBTARGET_OVERRIDE_OPTIONS \
202 if (target_flags & MASK_BNU210) \
204 warning ("-mbnu210 is ignored (option is obsolete)"); \
209 /* Support for C++ templates. */
210 #undef MAKE_DECL_ONE_ONLY
211 #define MAKE_DECL_ONE_ONLY(DECL) (DECL_WEAK (DECL) = 1)