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"
35 extern char *xmalloc PROTO((size_t));
38 lang_specific_driver (fn, in_argc, in_argv, in_added_libraries)
42 int *in_added_libraries;
46 /* If non-zero, the user gave us the `-v' flag. */
47 int saw_verbose_flag = 0;
49 /* This will be 0 if we encounter a situation where we should not
53 /* The number of arguments being added to what's in argv, other than
54 libraries. We use this to track the number of times we've inserted
58 /* Used to track options that take arguments, so we don't go wrapping
59 those with -xc++/-xnone. */
62 /* The new argument list will be contained in this. */
65 /* Non-zero if we saw a `-xfoo' language specification on the
66 command line. Used to avoid adding our own -xc++ if the user
67 already gave a language for the file. */
70 /* "-lm" or "-lmath" if it appears on the command line. */
73 /* "-lc" if it appears on the command line. */
76 /* An array used to flag each argument that needs a bit set for
77 LANGSPEC, MATHLIB, or WITHLIBC. */
80 /* By default, we throw on the math library if we have one. */
81 int need_math = (MATH_LIBRARY[0] != '\0');
83 /* The total number of arguments with the new stuff. */
86 /* The argument list. */
89 /* The number of libraries added in. */
92 /* The total number of arguments with the new stuff. */
97 added_libraries = *in_added_libraries;
99 args = (int *) xmalloc (argc * sizeof (int));
100 bzero ((char *) args, argc * sizeof (int));
102 for (i = 1; i < argc; i++)
104 /* If the previous option took an argument, we swallow it here. */
111 /* We don't do this anymore, since we don't get them with minus
113 if (argv[i][0] == '\0' || argv[i][1] == '\0')
116 if (argv[i][0] == '-')
118 if (library != 0 && (strcmp (argv[i], "-nostdlib") == 0
119 || strcmp (argv[i], "-nodefaultlibs") == 0))
123 else if (strcmp (argv[i], "-lm") == 0
124 || strcmp (argv[i], "-lmath") == 0
125 || strcmp (argv[i], MATH_LIBRARY) == 0
127 || strcmp (argv[i], ALT_LIBM) == 0
134 else if (strcmp (argv[i], "-lc") == 0)
136 else if (strcmp (argv[i], "-v") == 0)
138 saw_verbose_flag = 1;
141 /* If they only gave us `-v', don't try to link
146 else if (strncmp (argv[i], "-x", 2) == 0)
148 else if (((argv[i][2] == '\0'
149 && (char *)strchr ("bBVDUoeTuIYmLiA", argv[i][1]) != NULL)
150 || strcmp (argv[i], "-Tdata") == 0))
152 else if (library != 0 && ((argv[i][2] == '\0'
153 && (char *) strchr ("cSEM", argv[i][1]) != NULL)
154 || strcmp (argv[i], "-MM") == 0))
156 /* Don't specify libraries if we won't link, since that would
162 /* Pass other options through. */
175 /* If the filename ends in .c or .i, put options around it.
176 But not if a specified -x option is currently active. */
177 len = strlen (argv[i]);
179 && (argv[i][len - 1] == 'c' || argv[i][len - 1] == 'i')
180 && argv[i][len - 2] == '.')
189 (*fn) ("argument to `%s' missing\n", quote);
191 /* If we know we don't have to do anything, bail now. */
192 if (! added && ! library)
198 num_args = argc + added + need_math;
199 arglist = (char **) xmalloc (num_args * sizeof (char *));
201 /* NOTE: We start at 1 now, not 0. */
202 for (i = 0, j = 0; i < argc; i++, j++)
204 arglist[j] = argv[i];
206 /* Make sure -lstdc++ is before the math library, since libstdc++
207 itself uses those math routines. */
208 if (!saw_math && (args[i] & MATHLIB) && library)
214 if (!saw_libc && (args[i] & WITHLIBC) && library)
220 /* Wrap foo.c and foo.i files in a language specification to
221 force the gcc compiler driver to run cc1plus on them. */
222 if (args[i] & LANGSPEC)
224 int len = strlen (argv[i]);
225 if (argv[i][len - 1] == 'i')
226 arglist[j++] = "-xc++-cpp-output";
228 arglist[j++] = "-xc++";
229 arglist[j++] = argv[i];
230 arglist[j] = "-xnone";
234 /* Add `-lstdc++' if we haven't already done so. */
237 arglist[j++] = "-lstdc++";
241 arglist[j++] = saw_math;
242 else if (library && need_math)
244 arglist[j++] = MATH_LIBRARY;
248 arglist[j++] = saw_libc;
254 *in_added_libraries = added_libraries;
257 /* Called before linking. Returns 0 on success and -1 on failure. */
258 int lang_specific_pre_link () /* Not used for C++. */
263 /* Number of extra output files that lang_specific_pre_link may generate. */
264 int lang_specific_extra_outfiles = 0; /* Not used for C++. */