1 /* Specific flags and argument handling of the C++ front-end.
2 Copyright (C) 1996, 1997, 1998 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. */
24 /* This bit is set if we saw a `-xfoo' language specification. */
25 #define LANGSPEC (1<<1)
26 /* This bit is set if they did `-lm' or `-lmath'. */
27 #define MATHLIB (1<<2)
28 /* This bit is set if they did `-lc'. */
29 #define WITHLIBC (1<<3)
32 #define MATH_LIBRARY "-lm"
36 #define LIBSTDCXX "-lstdc++"
40 lang_specific_driver (fn, in_argc, in_argv, in_added_libraries)
44 int *in_added_libraries;
48 /* If non-zero, the user gave us the `-v' flag. */
49 int saw_verbose_flag = 0;
51 /* This will be 0 if we encounter a situation where we should not
55 /* The number of arguments being added to what's in argv, other than
56 libraries. We use this to track the number of times we've inserted
60 /* Used to track options that take arguments, so we don't go wrapping
61 those with -xc++/-xnone. */
64 /* The new argument list will be contained in this. */
67 /* Non-zero if we saw a `-xfoo' language specification on the
68 command line. Used to avoid adding our own -xc++ if the user
69 already gave a language for the file. */
72 /* "-lm" or "-lmath" if it appears on the command line. */
75 /* "-lc" if it appears on the command line. */
78 /* An array used to flag each argument that needs a bit set for
79 LANGSPEC, MATHLIB, or WITHLIBC. */
82 /* By default, we throw on the math library if we have one. */
83 int need_math = (MATH_LIBRARY[0] != '\0');
85 /* The total number of arguments with the new stuff. */
88 /* The argument list. */
91 /* The number of libraries added in. */
94 /* The total number of arguments with the new stuff. */
99 added_libraries = *in_added_libraries;
101 args = (int *) xmalloc (argc * sizeof (int));
102 bzero ((char *) args, argc * sizeof (int));
104 for (i = 1; i < argc; i++)
106 /* If the previous option took an argument, we swallow it here. */
113 /* We don't do this anymore, since we don't get them with minus
115 if (argv[i][0] == '\0' || argv[i][1] == '\0')
118 if (argv[i][0] == '-')
120 if (library != 0 && (strcmp (argv[i], "-nostdlib") == 0
121 || strcmp (argv[i], "-nodefaultlibs") == 0))
125 else if (strcmp (argv[i], "-lm") == 0
126 || strcmp (argv[i], "-lmath") == 0
127 || strcmp (argv[i], MATH_LIBRARY) == 0
129 || strcmp (argv[i], ALT_LIBM) == 0
136 else if (strcmp (argv[i], "-lc") == 0)
138 else if (strcmp (argv[i], "-v") == 0)
140 saw_verbose_flag = 1;
143 /* If they only gave us `-v', don't try to link
148 else if (strncmp (argv[i], "-x", 2) == 0)
150 else if (((argv[i][2] == '\0'
151 && (char *)strchr ("bBVDUoeTuIYmLiA", argv[i][1]) != NULL)
152 || strcmp (argv[i], "-Tdata") == 0))
154 else if (library != 0 && ((argv[i][2] == '\0'
155 && (char *) strchr ("cSEM", argv[i][1]) != NULL)
156 || strcmp (argv[i], "-MM") == 0))
158 /* Don't specify libraries if we won't link, since that would
164 /* Pass other options through. */
177 /* If the filename ends in .c or .i, put options around it.
178 But not if a specified -x option is currently active. */
179 len = strlen (argv[i]);
181 && (argv[i][len - 1] == 'c' || argv[i][len - 1] == 'i')
182 && argv[i][len - 2] == '.')
191 (*fn) ("argument to `%s' missing\n", quote);
193 /* If we know we don't have to do anything, bail now. */
194 if (! added && ! library)
200 num_args = argc + added + need_math;
201 arglist = (char **) xmalloc (num_args * sizeof (char *));
203 /* NOTE: We start at 1 now, not 0. */
204 for (i = 0, j = 0; i < argc; i++, j++)
206 arglist[j] = argv[i];
208 /* Make sure -lstdc++ is before the math library, since libstdc++
209 itself uses those math routines. */
210 if (!saw_math && (args[i] & MATHLIB) && library)
216 if (!saw_libc && (args[i] & WITHLIBC) && library)
222 /* Wrap foo.c and foo.i files in a language specification to
223 force the gcc compiler driver to run cc1plus on them. */
224 if (args[i] & LANGSPEC)
226 int len = strlen (argv[i]);
227 if (argv[i][len - 1] == 'i')
228 arglist[j++] = "-xc++-cpp-output";
230 arglist[j++] = "-xc++";
231 arglist[j++] = argv[i];
232 arglist[j] = "-xnone";
236 /* Add `-lstdc++' if we haven't already done so. */
239 arglist[j++] = LIBSTDCXX;
243 arglist[j++] = saw_math;
244 else if (library && need_math)
246 arglist[j++] = MATH_LIBRARY;
250 arglist[j++] = saw_libc;
256 *in_added_libraries = added_libraries;
259 /* Called before linking. Returns 0 on success and -1 on failure. */
260 int lang_specific_pre_link () /* Not used for C++. */
265 /* Number of extra output files that lang_specific_pre_link may generate. */
266 int lang_specific_extra_outfiles = 0; /* Not used for C++. */