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Diffstat (limited to 'gcc/ada/link.c')
| -rw-r--r-- | gcc/ada/link.c | 188 |
1 files changed, 188 insertions, 0 deletions
diff --git a/gcc/ada/link.c b/gcc/ada/link.c new file mode 100644 index 00000000000..a33735be8d0 --- /dev/null +++ b/gcc/ada/link.c @@ -0,0 +1,188 @@ +/**************************************************************************** + * * + * GNAT COMPILER COMPONENTS * + * * + * L I N K * + * * + * $Revision: 1.1 $ + * * + * C Implementation File * + * * + * Copyright (C) 1992-2001, 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. * + * It is now maintained by Ada Core Technologies Inc (http://www.gnat.com). * + * * + ****************************************************************************/ + +/* 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 <string.h> + +/* 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; +cnonst 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 (linux) +const char *object_file_option = ""; +const char *run_path_option = "-Wl,-rpath,"; +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 (__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 |