1 /* Specific flags and argument handling of the C++ front-end.
2 Copyright (C) 1996, 1997, 1998, 1999, 2000, 2001 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 /* This bit is set if we saw a `-xfoo' language specification. */
26 #define LANGSPEC (1<<1)
27 /* This bit is set if they did `-lm' or `-lmath'. */
28 #define MATHLIB (1<<2)
29 /* This bit is set if they did `-lc'. */
30 #define WITHLIBC (1<<3)
33 #define MATH_LIBRARY "-lm"
35 #ifndef MATH_LIBRARY_PROFILE
36 #define MATH_LIBRARY_PROFILE "-lm"
40 #define LIBSTDCXX "-lstdc++"
42 #ifndef LIBSTDCXX_PROFILE
43 #define LIBSTDCXX_PROFILE "-lstdc++"
47 #define LIBUNWIND "-lunwind"
51 lang_specific_driver (in_argc, in_argv, in_added_libraries)
53 const char *const **in_argv;
54 int *in_added_libraries;
58 /* If non-zero, the user gave us the `-p' or `-pg' flag. */
59 int saw_profile_flag = 0;
61 /* If non-zero, the user gave us the `-v' flag. */
62 int saw_verbose_flag = 0;
64 /* This will be 0 if we encounter a situation where we should not
68 /* The number of arguments being added to what's in argv, other than
69 libraries. We use this to track the number of times we've inserted
73 /* Used to track options that take arguments, so we don't go wrapping
74 those with -xc++/-xnone. */
75 const char *quote = NULL;
77 /* The new argument list will be contained in this. */
80 /* Non-zero if we saw a `-xfoo' language specification on the
81 command line. Used to avoid adding our own -xc++ if the user
82 already gave a language for the file. */
85 /* "-lm" or "-lmath" if it appears on the command line. */
86 const char *saw_math = 0;
88 /* "-lc" if it appears on the command line. */
89 const char *saw_libc = 0;
91 /* An array used to flag each argument that needs a bit set for
92 LANGSPEC, MATHLIB, or WITHLIBC. */
95 /* By default, we throw on the math library if we have one. */
96 int need_math = (MATH_LIBRARY[0] != '\0');
98 /* True if we should add -shared-libgcc to the command-line. */
99 int shared_libgcc = 1;
101 /* The total number of arguments with the new stuff. */
104 /* The argument list. */
105 const char *const *argv;
107 /* The number of libraries added in. */
110 /* The total number of arguments with the new stuff. */
115 added_libraries = *in_added_libraries;
117 args = (int *) xcalloc (argc, sizeof (int));
119 for (i = 1; i < argc; i++)
121 /* If the previous option took an argument, we swallow it here. */
128 /* We don't do this anymore, since we don't get them with minus
130 if (argv[i][0] == '\0' || argv[i][1] == '\0')
133 if (argv[i][0] == '-')
135 if (library != 0 && (strcmp (argv[i], "-nostdlib") == 0
136 || strcmp (argv[i], "-nodefaultlibs") == 0))
140 else if (strcmp (argv[i], "-lm") == 0
141 || strcmp (argv[i], "-lmath") == 0
142 || strcmp (argv[i], MATH_LIBRARY) == 0
144 || strcmp (argv[i], ALT_LIBM) == 0
151 else if (strcmp (argv[i], "-lc") == 0)
153 else if (strcmp (argv[i], "-pg") == 0 || strcmp (argv[i], "-p") == 0)
155 else if (strcmp (argv[i], "-v") == 0)
157 saw_verbose_flag = 1;
160 /* If they only gave us `-v', don't try to link
165 else if (strncmp (argv[i], "-x", 2) == 0)
167 else if (((argv[i][2] == '\0'
168 && (char *)strchr ("bBVDUoeTuIYmLiA", argv[i][1]) != NULL)
169 || strcmp (argv[i], "-Xlinker") == 0
170 || strcmp (argv[i], "-Tdata") == 0))
172 else if (library != 0 && ((argv[i][2] == '\0'
173 && (char *) strchr ("cSEM", argv[i][1]) != NULL)
174 || strcmp (argv[i], "-MM") == 0
175 || strcmp (argv[i], "-fsyntax-only") == 0))
177 /* Don't specify libraries if we won't link, since that would
182 else if (strcmp (argv[i], "-static-libgcc") == 0
183 || strcmp (argv[i], "-static") == 0)
186 /* Pass other options through. */
199 /* If the filename ends in .c or .i, put options around it.
200 But not if a specified -x option is currently active. */
201 len = strlen (argv[i]);
203 && (argv[i][len - 1] == 'c' || argv[i][len - 1] == 'i')
204 && argv[i][len - 2] == '.')
213 fatal ("argument to `%s' missing\n", quote);
215 /* If we know we don't have to do anything, bail now. */
216 if (! added && ! library)
222 /* There's no point adding -shared-libgcc if we don't have a shared
224 #ifndef ENABLE_SHARED_LIBGCC
228 /* Make sure to have room for the trailing NULL argument. */
229 num_args = argc + added + need_math + shared_libgcc + 1;
230 arglist = (const char **) xmalloc (num_args * sizeof (char *));
235 /* Copy the 0th argument, i.e., the name of the program itself. */
236 arglist[i++] = argv[j++];
238 /* NOTE: We start at 1 now, not 0. */
241 arglist[j] = argv[i];
243 /* Make sure -lstdc++ is before the math library, since libstdc++
244 itself uses those math routines. */
245 if (!saw_math && (args[i] & MATHLIB) && library)
251 if (!saw_libc && (args[i] & WITHLIBC) && library)
257 /* Wrap foo.c and foo.i files in a language specification to
258 force the gcc compiler driver to run cc1plus on them. */
259 if (args[i] & LANGSPEC)
261 int len = strlen (argv[i]);
262 if (argv[i][len - 1] == 'i')
263 arglist[j++] = "-xc++-cpp-output";
265 arglist[j++] = "-xc++";
266 arglist[j++] = argv[i];
267 arglist[j] = "-xnone";
274 /* Add `-lstdc++' if we haven't already done so. */
277 arglist[j++] = saw_profile_flag ? LIBSTDCXX_PROFILE : LIBSTDCXX;
279 #ifdef USE_LIBUNWIND_EXCEPTIONS
280 arglist[j++] = LIBUNWIND;
285 arglist[j++] = saw_math;
286 else if (library && need_math)
288 arglist[j++] = saw_profile_flag ? MATH_LIBRARY_PROFILE : MATH_LIBRARY;
292 arglist[j++] = saw_libc;
294 arglist[j++] = "-shared-libgcc";
300 *in_added_libraries = added_libraries;
303 /* Called before linking. Returns 0 on success and -1 on failure. */
304 int lang_specific_pre_link () /* Not used for C++. */
309 /* Number of extra output files that lang_specific_pre_link may generate. */
310 int lang_specific_extra_outfiles = 0; /* Not used for C++. */