1 /* Specific flags and argument handling of the C++ front end.
2 Copyright (C) 1996, 1997, 1998, 1999, 2000, 2001, 2002, 2003, 2004
3 Free Software Foundation, Inc.
5 This file is part of GCC.
7 GCC is free software; you can redistribute it and/or modify
8 it under the terms of the GNU General Public License as published by
9 the Free Software Foundation; either version 2, or (at your option)
12 GCC is distributed in the hope that it will be useful,
13 but WITHOUT ANY WARRANTY; without even the implied warranty of
14 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15 GNU General Public License for more details.
17 You should have received a copy of the GNU General Public License
18 along with GCC; see the file COPYING. If not, write to
19 the Free Software Foundation, 51 Franklin Street, Fifth Floor,
20 Boston, MA 02110-1301, USA. */
24 #include "coretypes.h"
28 /* This bit is set if we saw a `-xfoo' language specification. */
29 #define LANGSPEC (1<<1)
30 /* This bit is set if they did `-lm' or `-lmath'. */
31 #define MATHLIB (1<<2)
32 /* This bit is set if they did `-lc'. */
33 #define WITHLIBC (1<<3)
36 #define MATH_LIBRARY "-lm"
38 #ifndef MATH_LIBRARY_PROFILE
39 #define MATH_LIBRARY_PROFILE MATH_LIBRARY
43 #define LIBSTDCXX "-lstdc++"
45 #ifndef LIBSTDCXX_PROFILE
46 #define LIBSTDCXX_PROFILE LIBSTDCXX
50 lang_specific_driver (int *in_argc, const char *const **in_argv,
51 int *in_added_libraries)
55 /* If nonzero, the user gave us the `-p' or `-pg' flag. */
56 int saw_profile_flag = 0;
58 /* If nonzero, the user gave us the `-v' flag. */
59 int saw_verbose_flag = 0;
61 /* This is a tristate:
62 -1 means we should not link in libstdc++
63 0 means we should link in libstdc++ if it is needed
64 1 means libstdc++ is needed and should be linked in. */
67 /* The number of arguments being added to what's in argv, other than
68 libraries. We use this to track the number of times we've inserted
72 /* Used to track options that take arguments, so we don't go wrapping
73 those with -xc++/-xnone. */
74 const char *quote = NULL;
76 /* The new argument list will be contained in this. */
79 /* Nonzero if we saw a `-xfoo' language specification on the
80 command line. Used to avoid adding our own -xc++ if the user
81 already gave a language for the file. */
84 /* "-lm" or "-lmath" if it appears on the command line. */
85 const char *saw_math = 0;
87 /* "-lc" if it appears on the command line. */
88 const char *saw_libc = 0;
90 /* An array used to flag each argument that needs a bit set for
91 LANGSPEC, MATHLIB, or WITHLIBC. */
94 /* By default, we throw on the math library if we have one. */
95 int need_math = (MATH_LIBRARY[0] != '\0');
97 /* True if we should add -shared-libgcc to the command-line. */
98 int shared_libgcc = 1;
100 /* The total number of arguments with the new stuff. */
103 /* The argument list. */
104 const char *const *argv;
106 /* The number of libraries added in. */
109 /* The total number of arguments with the new stuff. */
114 added_libraries = *in_added_libraries;
116 args = XCNEWVEC (int, argc);
118 for (i = 1; i < argc; i++)
120 /* If the previous option took an argument, we swallow it here. */
127 /* We don't do this anymore, since we don't get them with minus
129 if (argv[i][0] == '\0' || argv[i][1] == '\0')
132 if (argv[i][0] == '-')
134 if (strcmp (argv[i], "-nostdlib") == 0
135 || strcmp (argv[i], "-nodefaultlibs") == 0)
139 else if (strcmp (argv[i], MATH_LIBRARY) == 0)
144 else if (strcmp (argv[i], "-lc") == 0)
146 else if (strcmp (argv[i], "-pg") == 0 || strcmp (argv[i], "-p") == 0)
148 else if (strcmp (argv[i], "-v") == 0)
149 saw_verbose_flag = 1;
150 else if (strncmp (argv[i], "-x", 2) == 0)
153 if (argv[i][2] != '\0')
155 else if ((argv[i+1]) != NULL)
156 /* We need to swallow arg on next loop. */
157 quote = arg = argv[i+1];
158 else /* Error condition, message will be printed later. */
161 && (strcmp (arg, "c++") == 0
162 || strcmp (arg, "c++-cpp-output") == 0
163 || strcmp (arg, "objective-c++") == 0
164 || strcmp (arg, "objective-c++-cpp-output") == 0))
169 else if (strcmp (argv[i], "-ObjC++") == 0)
175 /* Arguments that go directly to the linker might be .o files,
176 or something, and so might cause libstdc++ to be needed. */
177 else if (strcmp (argv[i], "-Xlinker") == 0)
183 else if (strncmp (argv[i], "-Wl,", 4) == 0)
184 library = (library == 0) ? 1 : library;
185 /* Unrecognized libraries (e.g. -lfoo) may require libstdc++. */
186 else if (strncmp (argv[i], "-l", 2) == 0)
187 library = (library == 0) ? 1 : library;
188 else if (((argv[i][2] == '\0'
189 && strchr ("bBVDUoeTuIYmLiA", argv[i][1]) != NULL)
190 || strcmp (argv[i], "-Tdata") == 0))
192 else if ((argv[i][2] == '\0'
193 && strchr ("cSEM", argv[i][1]) != NULL)
194 || strcmp (argv[i], "-MM") == 0
195 || strcmp (argv[i], "-fsyntax-only") == 0)
197 /* Don't specify libraries if we won't link, since that would
201 else if (strcmp (argv[i], "-static-libgcc") == 0
202 || strcmp (argv[i], "-static") == 0)
204 else if (DEFAULT_WORD_SWITCH_TAKES_ARG (&argv[i][1]))
207 /* Pass other options through. */
220 /* If the filename ends in .[chi], put options around it.
221 But not if a specified -x option is currently active. */
222 len = strlen (argv[i]);
224 && (argv[i][len - 1] == 'c'
225 || argv[i][len - 1] == 'i'
226 || argv[i][len - 1] == 'h')
227 && argv[i][len - 2] == '.')
233 /* If we don't know that this is a header file, we might
234 need to be linking in the libraries. */
237 if ((len <= 2 || strcmp (argv[i] + (len - 2), ".H") != 0)
238 && (len <= 2 || strcmp (argv[i] + (len - 2), ".h") != 0)
239 && (len <= 3 || strcmp (argv[i] + (len - 3), ".hh") != 0))
246 fatal ("argument to '%s' missing\n", quote);
248 /* There's no point adding -shared-libgcc if we don't have a shared
250 #ifndef ENABLE_SHARED_LIBGCC
254 /* Make sure to have room for the trailing NULL argument. */
255 num_args = argc + added + need_math + shared_libgcc + (library > 0) + 1;
256 arglist = XNEWVEC (const char *, num_args);
261 /* Copy the 0th argument, i.e., the name of the program itself. */
262 arglist[i++] = argv[j++];
264 /* NOTE: We start at 1 now, not 0. */
267 arglist[j] = argv[i];
269 /* Make sure -lstdc++ is before the math library, since libstdc++
270 itself uses those math routines. */
271 if (!saw_math && (args[i] & MATHLIB) && library > 0)
277 if (!saw_libc && (args[i] & WITHLIBC) && library > 0)
283 /* Wrap foo.[chi] files in a language specification to
284 force the gcc compiler driver to run cc1plus on them. */
285 if (args[i] & LANGSPEC)
287 int len = strlen (argv[i]);
288 switch (argv[i][len - 1])
291 arglist[j++] = "-xc++";
294 arglist[j++] = "-xc++-cpp-output";
297 arglist[j++] = "-xc++-header";
302 arglist[j++] = argv[i];
303 arglist[j] = "-xnone";
310 /* Add `-lstdc++' if we haven't already done so. */
313 arglist[j] = saw_profile_flag ? LIBSTDCXX_PROFILE : LIBSTDCXX;
314 if (arglist[j][0] != '-' || arglist[j][1] == 'l')
319 arglist[j++] = saw_math;
320 else if (library > 0 && need_math)
322 arglist[j] = saw_profile_flag ? MATH_LIBRARY_PROFILE : MATH_LIBRARY;
323 if (arglist[j][0] != '-' || arglist[j][1] == 'l')
328 arglist[j++] = saw_libc;
330 arglist[j++] = "-shared-libgcc";
336 *in_added_libraries = added_libraries;
339 /* Called before linking. Returns 0 on success and -1 on failure. */
340 int lang_specific_pre_link (void) /* Not used for C++. */
345 /* Number of extra output files that lang_specific_pre_link may generate. */
346 int lang_specific_extra_outfiles = 0; /* Not used for C++. */