1/* Definitions for Linux-based GNU systems with ELF format 2 Copyright (C) 1995, 1996, 1997, 1998, 1999, 2000, 2003, 2004, 2005, 2006 3 Free Software Foundation, Inc. 4 Contributed by Eric Youngdale. 5 Modified for stabs-in-ELF by H.J. Lu (hjl@lucon.org). 6 7This file is part of GCC. 8 9GCC is free software; you can redistribute it and/or modify 10it under the terms of the GNU General Public License as published by 11the Free Software Foundation; either version 2, or (at your option) 12any later version. 13 14GCC is distributed in the hope that it will be useful, 15but WITHOUT ANY WARRANTY; without even the implied warranty of 16MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 17GNU General Public License for more details. 18 19You should have received a copy of the GNU General Public License 20along with GCC; see the file COPYING. If not, write to 21the Free Software Foundation, 51 Franklin Street, Fifth Floor, 22Boston, MA 02110-1301, USA. */ 23 24/* Don't assume anything about the header files. */ 25#define NO_IMPLICIT_EXTERN_C 26 27#undef ASM_APP_ON 28#define ASM_APP_ON "#APP\n" 29 30#undef ASM_APP_OFF 31#define ASM_APP_OFF "#NO_APP\n" 32 33#undef MD_EXEC_PREFIX 34#undef MD_STARTFILE_PREFIX 35 36/* Provide a STARTFILE_SPEC appropriate for GNU/Linux. Here we add 37 the GNU/Linux magical crtbegin.o file (see crtstuff.c) which 38 provides part of the support for getting C++ file-scope static 39 object constructed before entering `main'. */ 40 41#undef STARTFILE_SPEC 42#if defined HAVE_LD_PIE 43#define STARTFILE_SPEC \ 44 "%{!shared: %{pg|p|profile:gcrt1.o%s;pie:Scrt1.o%s;:crt1.o%s}} \ 45 crti.o%s %{static:crtbeginT.o%s;shared|pie:crtbeginS.o%s;:crtbegin.o%s}" 46#else 47#define STARTFILE_SPEC \ 48 "%{!shared: %{pg|p|profile:gcrt1.o%s;:crt1.o%s}} \ 49 crti.o%s %{static:crtbeginT.o%s;shared|pie:crtbeginS.o%s;:crtbegin.o%s}" 50#endif 51 52/* Provide a ENDFILE_SPEC appropriate for GNU/Linux. Here we tack on 53 the GNU/Linux magical crtend.o file (see crtstuff.c) which 54 provides part of the support for getting C++ file-scope static 55 object constructed before entering `main', followed by a normal 56 GNU/Linux "finalizer" file, `crtn.o'. */ 57 58#undef ENDFILE_SPEC 59#define ENDFILE_SPEC \ 60 "%{shared|pie:crtendS.o%s;:crtend.o%s} crtn.o%s" 61 62/* This is for -profile to use -lc_p instead of -lc. */ 63#ifndef CC1_SPEC 64#define CC1_SPEC "%{profile:-p}" 65#endif 66 67/* The GNU C++ standard library requires that these macros be defined. */ 68#undef CPLUSPLUS_CPP_SPEC 69#define CPLUSPLUS_CPP_SPEC "-D_GNU_SOURCE %(cpp)" 70 71#undef LIB_SPEC 72#define LIB_SPEC \ 73 "%{pthread:-lpthread} \ 74 %{shared:-lc} \ 75 %{!shared:%{mieee-fp:-lieee} %{profile:-lc_p}%{!profile:-lc}}" 76 77#define LINUX_TARGET_OS_CPP_BUILTINS() \ 78 do { \ 79 builtin_define ("__gnu_linux__"); \ 80 builtin_define_std ("linux"); \ 81 builtin_define_std ("unix"); \ 82 builtin_assert ("system=linux"); \ 83 builtin_assert ("system=unix"); \ 84 builtin_assert ("system=posix"); \ 85 } while (0) 86 87#if defined(HAVE_LD_EH_FRAME_HDR) 88#define LINK_EH_SPEC "%{!static:--eh-frame-hdr} " 89#endif 90 91/* Define this so we can compile MS code for use with WINE. */ 92#define HANDLE_PRAGMA_PACK_PUSH_POP 93 94#define LINK_GCC_C_SEQUENCE_SPEC \ 95 "%{static:--start-group} %G %L %{static:--end-group}%{!static:%G}" 96 97/* Use --as-needed -lgcc_s for eh support. */ 98#ifdef HAVE_LD_AS_NEEDED 99#define USE_LD_AS_NEEDED 1 100#endif 101 102/* Determine which dynamic linker to use depending on whether GLIBC or 103 uClibc is the default C library and whether -muclibc or -mglibc has 104 been passed to change the default. */ 105#if UCLIBC_DEFAULT 106#define CHOOSE_DYNAMIC_LINKER(G, U) "%{mglibc:%{muclibc:%e-mglibc and -muclibc used together}" G ";:" U "}" 107#else 108#define CHOOSE_DYNAMIC_LINKER(G, U) "%{muclibc:%{mglibc:%e-mglibc and -muclibc used together}" U ";:" G "}" 109#endif 110 111/* For most targets the following definitions suffice; 112 GLIBC_DYNAMIC_LINKER must be defined for each target using them, or 113 GLIBC_DYNAMIC_LINKER32 and GLIBC_DYNAMIC_LINKER64 for targets 114 supporting both 32-bit and 64-bit compilation. */ 115#define UCLIBC_DYNAMIC_LINKER "/lib/ld-uClibc.so.0" 116#define UCLIBC_DYNAMIC_LINKER32 "/lib/ld-uClibc.so.0" 117#define UCLIBC_DYNAMIC_LINKER64 "/lib/ld64-uClibc.so.0" 118#define LINUX_DYNAMIC_LINKER \ 119 CHOOSE_DYNAMIC_LINKER (GLIBC_DYNAMIC_LINKER, UCLIBC_DYNAMIC_LINKER) 120#define LINUX_DYNAMIC_LINKER32 \ 121 CHOOSE_DYNAMIC_LINKER (GLIBC_DYNAMIC_LINKER32, UCLIBC_DYNAMIC_LINKER32) 122#define LINUX_DYNAMIC_LINKER64 \ 123 CHOOSE_DYNAMIC_LINKER (GLIBC_DYNAMIC_LINKER64, UCLIBC_DYNAMIC_LINKER64) 124 125/* Determine whether the entire c99 runtime 126 is present in the runtime library. */ 127#define TARGET_C99_FUNCTIONS (OPTION_GLIBC) 128 129#define TARGET_POSIX_IO 130