/**************************************************************************** * * * GNAT COMPILER COMPONENTS * * * * L I N K * * * * C Implementation File * * * * Copyright (C) 1992-2003, Free Software Foundation, Inc. * * * * GNAT is free software; you can redistribute it and/or modify it under * * terms of the GNU General Public License as published by the Free Soft- * * ware Foundation; either version 2, or (at your option) any later ver- * * sion. GNAT is distributed in the hope that it will be useful, but WITH- * * OUT 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 distributed with GNAT; see file COPYING. If not, write * * to the Free Software Foundation, 59 Temple Place - Suite 330, Boston, * * MA 02111-1307, USA. * * * * As a special exception, if you link this file with other files to * * produce an executable, this file does not by itself cause the resulting * * executable to be covered by the GNU General Public License. This except- * * ion does not however invalidate any other reasons why the executable * * file might be covered by the GNU Public License. * * * * GNAT was originally developed by the GNAT team at New York University. * * Extensive contributions were provided by Ada Core Technologies Inc. * * * ****************************************************************************/ /* This file contains parameterizations used by gnatlink.adb in handling */ /* very long linker lines in systems where there are limitations on the */ /* argument length when the command line is used to pass items to the */ /* linker */ #include /* objlist_file_supported is set to 1 when the system linker allows */ /* response file, that is a file that contains the list of object files. */ /* This is useful on systems where the command line length is limited, */ /* meaning that putting all the object files on the command line can */ /* result in an unacceptable limit on the number of files. */ /* object_file_option denotes the system dependent linker option which */ /* allows object file names to be placed in a file and then passed to */ /* the linker. object_file_option must be set if objlist_file_supported */ /* is set to 1. */ /* link_max is a conservative system specific threshold (in bytes) of the */ /* argument length passed to the linker which will trigger a file being */ /* used instead of the command line directly. If the argument length is */ /* greater than this threshhold, then an objlist_file will be generated */ /* and object_file_option and objlist_file_supported must be set. If */ /* objlist_file_supported is set to 0 (unsupported), then link_max is */ /* set to 2**31-1 so that the limit will never be exceeded. */ /* run_path_option is the system dependent linker option which specifies */ /* the run time path to use when loading dynamic libraries. This should */ /* be set to the null string if the system does not support dynmamic */ /* loading of libraries. */ /* shared_libgnat_default gives the system dependent link method that */ /* be used by default for linking libgnat (shared or static) */ /* using_gnu_linker is set to 1 when the GNU linker is used under this */ /* target. */ /* RESPONSE FILE & GNU LINKER */ /* -------------------------- */ /* objlist_file_supported and using_gnu_link used together tell gnatlink */ /* to generate a GNU style response file. Note that object_file_option */ /* must be set to "" in this case, since no option is required for a */ /* response file to be passed to GNU ld. With a GNU linker we use the */ /* linker script to implement the response file feature. Any file passed */ /* in the GNU ld command line with an unknown extension is supposed to be */ /* a linker script. Each linker script augment the current configuration. */ /* The format of such response file is as follow : */ /* INPUT (obj1.p obj2.o ...) */ #define SHARED 'H' #define STATIC 'T' #if defined (__osf__) const char *object_file_option = "-Wl,-input,"; const char *run_path_option = "-Wl,-rpath,"; int link_max = 10000; unsigned char objlist_file_supported = 1; char shared_libgnat_default = STATIC; unsigned char using_gnu_linker = 0; const char *object_library_extension = ".a"; #elif defined (sgi) const char *object_file_option = "-Wl,-objectlist,"; const char *run_path_option = "-Wl,-rpath,"; int link_max = 5000; unsigned char objlist_file_supported = 1; char shared_libgnat_default = SHARED; unsigned char using_gnu_linker = 0; const char *object_library_extension = ".a"; #elif defined (__WIN32) const char *object_file_option = ""; const char *run_path_option = ""; int link_max = 30000; unsigned char objlist_file_supported = 1; char shared_libgnat_default = STATIC; unsigned char using_gnu_linker = 1; const char *object_library_extension = ".a"; #elif defined (__INTERIX) const char *object_file_option = ""; const char *run_path_option = ""; int link_max = 5000; unsigned char objlist_file_supported = 1; char shared_libgnat_default = STATIC; unsigned char using_gnu_linker = 1; const char *object_library_extension = ".a"; #elif defined (hpux) const char *object_file_option = "-Wl,-c,"; const char *run_path_option = "-Wl,+b,"; int link_max = 5000; unsigned char objlist_file_supported = 1; char shared_libgnat_default = STATIC; unsigned char using_gnu_linker = 0; const char *object_library_extension = ".a"; #elif defined (_AIX) const char *object_file_option = "-Wl,-f,"; const char *run_path_option = ""; int link_max = 15000; const unsigned char objlist_file_supported = 1; char shared_libgnat_default = STATIC; unsigned char using_gnu_linker = 0; const char *object_library_extension = ".a"; #elif defined (VMS) const char *object_file_option = ""; const char *run_path_option = ""; char shared_libgnat_default = SHARED; int link_max = 2147483647; unsigned char objlist_file_supported = 0; unsigned char using_gnu_linker = 0; const char *object_library_extension = ".olb"; #elif defined (sun) const char *object_file_option = ""; const char *run_path_option = "-R"; char shared_libgnat_default = STATIC; int link_max = 2147483647; unsigned char objlist_file_supported = 0; unsigned char using_gnu_linker = 0; const char *object_library_extension = ".a"; #elif defined (__FreeBSD__) char *object_file_option = ""; char *run_path_option = ""; char shared_libgnat_default = SHARED; int link_max = 2147483647; unsigned char objlist_file_supported = 0; unsigned char using_gnu_linker = 0; char *object_library_extension = ".a"; #elif defined (linux) const char *object_file_option = ""; const char *run_path_option = "-Wl,-rpath,"; char shared_libgnat_default = STATIC; int link_max = 8192; unsigned char objlist_file_supported = 1; unsigned char using_gnu_linker = 1; const char *object_library_extension = ".a"; #elif defined (__svr4__) && defined (i386) const char *object_file_option = ""; const char *run_path_option = ""; char shared_libgnat_default = STATIC; int link_max = 2147483647; unsigned char objlist_file_supported = 0; unsigned char using_gnu_linker = 0; const char *object_library_extension = ".a"; #else /* These are the default settings for all other systems. No response file is supported, the shared library default is STATIC. */ const char *run_path_option = ""; const char *object_file_option = ""; char shared_libgnat_default = STATIC; int link_max = 2147483647; unsigned char objlist_file_supported = 0; unsigned char using_gnu_linker = 0; const char *object_library_extension = ".a"; #endif