1 /* Specific flags and argument handling of the C++ front-end.
2 Copyright (C) 1996, 1997 Free Software Foundation, Inc.
4 This file is part of GNU CC.
6 GNU CC is free software; you can redistribute it and/or modify
7 it under the terms of the GNU General Public License as published by
8 the Free Software Foundation; either version 2, or (at your option)
11 GNU CC is distributed in the hope that it will be useful,
12 but WITHOUT ANY WARRANTY; without even the implied warranty of
13 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14 GNU General Public License for more details.
16 You should have received a copy of the GNU General Public License
17 along with GNU CC; see the file COPYING. If not, write to
18 the Free Software Foundation, 59 Temple Place - Suite 330,
19 Boston, MA 02111-1307, USA. */
25 #include "gansidecl.h"
27 /* This bit is set if we saw a `-xfoo' language specification. */
28 #define LANGSPEC (1<<1)
29 /* This bit is set if they did `-lm' or `-lmath'. */
30 #define MATHLIB (1<<2)
31 /* This bit is set if they did `-lc'. */
32 #define WITHLIBC (1<<3)
35 #define MATH_LIBRARY "-lm"
37 #ifndef NEED_MATH_LIBRARY
38 #define NEED_MATH_LIBRARY 1 /* Default is pass MATH_LIBRARY to linker */
41 extern char *xmalloc PROTO((size_t));
44 lang_specific_driver (fn, in_argc, in_argv, in_added_libraries)
48 int *in_added_libraries;
52 /* If non-zero, the user gave us the `-v' flag. */
53 int saw_verbose_flag = 0;
55 /* This will be 0 if we encounter a situation where we should not
59 /* The number of arguments being added to what's in argv, other than
60 libraries. We use this to track the number of times we've inserted
64 /* Used to track options that take arguments, so we don't go wrapping
65 those with -xc++/-xnone. */
68 /* The new argument list will be contained in this. */
71 /* Non-zero if we saw a `-xfoo' language specification on the
72 command line. Used to avoid adding our own -xc++ if the user
73 already gave a language for the file. */
76 /* "-lm" or "-lmath" if it appears on the command line. */
79 /* "-lc" if it appears on the command line. */
82 /* An array used to flag each argument that needs a bit set for
83 LANGSPEC, MATHLIB, or WITHLIBC. */
86 /* By default, we throw on the math library. */
87 int need_math = NEED_MATH_LIBRARY;
89 /* The total number of arguments with the new stuff. */
92 /* The argument list. */
95 /* The number of libraries added in. */
98 /* The total number of arguments with the new stuff. */
103 added_libraries = *in_added_libraries;
105 args = (int *) xmalloc (argc * sizeof (int));
106 bzero ((char *) args, argc * sizeof (int));
108 for (i = 1; i < argc; i++)
110 /* If the previous option took an argument, we swallow it here. */
117 /* We don't do this anymore, since we don't get them with minus
119 if (argv[i][0] == '\0' || argv[i][1] == '\0')
122 if (argv[i][0] == '-')
124 if (library != 0 && (strcmp (argv[i], "-nostdlib") == 0
125 || strcmp (argv[i], "-nodefaultlibs") == 0))
129 else if (strcmp (argv[i], "-lm") == 0
130 || strcmp (argv[i], "-lmath") == 0
132 || strcmp (argv[i], ALT_LIBM) == 0
139 else if (strcmp (argv[i], "-lc") == 0)
141 else if (strcmp (argv[i], "-v") == 0)
143 saw_verbose_flag = 1;
146 /* If they only gave us `-v', don't try to link
151 else if (strncmp (argv[i], "-x", 2) == 0)
153 else if (((argv[i][2] == '\0'
154 && (char *)strchr ("bBVDUoeTuIYmLiA", argv[i][1]) != NULL)
155 || strcmp (argv[i], "-Tdata") == 0))
157 else if (library != 0 && ((argv[i][2] == '\0'
158 && (char *) strchr ("cSEM", argv[i][1]) != NULL)
159 || strcmp (argv[i], "-MM") == 0))
161 /* Don't specify libraries if we won't link, since that would
167 /* Pass other options through. */
180 /* If the filename ends in .c or .i, put options around it.
181 But not if a specified -x option is currently active. */
182 len = strlen (argv[i]);
184 && (argv[i][len - 1] == 'c' || argv[i][len - 1] == 'i')
185 && argv[i][len - 2] == '.')
194 (*fn) ("argument to `%s' missing\n", quote);
196 /* If we know we don't have to do anything, bail now. */
197 if (! added && ! library)
203 num_args = argc + added + need_math;
204 arglist = (char **) xmalloc (num_args * sizeof (char *));
206 /* NOTE: We start at 1 now, not 0. */
207 for (i = 0, j = 0; i < argc; i++, j++)
209 arglist[j] = argv[i];
211 /* Make sure -lstdc++ is before the math library, since libstdc++
212 itself uses those math routines. */
213 if (!saw_math && (args[i] & MATHLIB) && library)
219 if (!saw_libc && (args[i] & WITHLIBC) && library)
225 /* Wrap foo.c and foo.i files in a language specification to
226 force the gcc compiler driver to run cc1plus on them. */
227 if (args[i] & LANGSPEC)
229 int len = strlen (argv[i]);
230 if (argv[i][len - 1] == 'i')
231 arglist[j++] = "-xc++-cpp-output";
233 arglist[j++] = "-xc++";
234 arglist[j++] = argv[i];
235 arglist[j] = "-xnone";
239 /* Add `-lstdc++' if we haven't already done so. */
242 arglist[j++] = "-lstdc++";
246 arglist[j++] = saw_math;
247 else if (library && need_math)
249 arglist[j++] = MATH_LIBRARY;
253 arglist[j++] = saw_libc;
259 *in_added_libraries = added_libraries;
262 /* Called before linking. Returns 0 on success and -1 on failure. */
263 int lang_specific_pre_link () /* Not used for C++. */
268 /* Number of extra output files that lang_specific_pre_link may generate. */
269 int lang_specific_extra_outfiles = 0; /* Not used for C++. */