1 /* Specific flags and argument handling of the C++ front end.
2 Copyright (C) 1996, 1997, 1998, 1999, 2000, 2001, 2002, 2003, 2004,
3 2007 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 3, 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 COPYING3. If not see
19 <http://www.gnu.org/licenses/>. */
23 #include "coretypes.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 MATH_LIBRARY_PROFILE
38 #define MATH_LIBRARY_PROFILE MATH_LIBRARY
42 #define LIBSTDCXX "-lstdc++"
44 #ifndef LIBSTDCXX_PROFILE
45 #define LIBSTDCXX_PROFILE LIBSTDCXX
49 lang_specific_driver (int *in_argc, const char *const **in_argv,
50 int *in_added_libraries)
54 /* If nonzero, the user gave us the `-p' or `-pg' flag. */
55 int saw_profile_flag = 0;
57 /* If nonzero, the user gave us the `-v' flag. */
58 int saw_verbose_flag = 0;
60 /* This is a tristate:
61 -1 means we should not link in libstdc++
62 0 means we should link in libstdc++ if it is needed
63 1 means libstdc++ is needed and should be linked in. */
66 /* The number of arguments being added to what's in argv, other than
67 libraries. We use this to track the number of times we've inserted
71 /* Used to track options that take arguments, so we don't go wrapping
72 those with -xc++/-xnone. */
73 const char *quote = NULL;
75 /* The new argument list will be contained in this. */
78 /* Nonzero if we saw a `-xfoo' language specification on the
79 command line. Used to avoid adding our own -xc++ if the user
80 already gave a language for the file. */
83 /* "-lm" or "-lmath" if it appears on the command line. */
84 const char *saw_math = 0;
86 /* "-lc" if it appears on the command line. */
87 const char *saw_libc = 0;
89 /* An array used to flag each argument that needs a bit set for
90 LANGSPEC, MATHLIB, or WITHLIBC. */
93 /* By default, we throw on the math library if we have one. */
94 int need_math = (MATH_LIBRARY[0] != '\0');
96 /* True if we should add -shared-libgcc to the command-line. */
97 int shared_libgcc = 1;
99 /* The total number of arguments with the new stuff. */
102 /* The argument list. */
103 const char *const *argv;
105 /* The number of libraries added in. */
108 /* The total number of arguments with the new stuff. */
113 added_libraries = *in_added_libraries;
115 args = XCNEWVEC (int, argc);
117 for (i = 1; i < argc; i++)
119 /* If the previous option took an argument, we swallow it here. */
126 /* We don't do this anymore, since we don't get them with minus
128 if (argv[i][0] == '\0' || argv[i][1] == '\0')
131 if (argv[i][0] == '-')
133 if (strcmp (argv[i], "-nostdlib") == 0
134 || strcmp (argv[i], "-nodefaultlibs") == 0)
138 else if (strcmp (argv[i], MATH_LIBRARY) == 0)
143 else if (strcmp (argv[i], "-lc") == 0)
145 else if (strcmp (argv[i], "-pg") == 0 || strcmp (argv[i], "-p") == 0)
147 else if (strcmp (argv[i], "-v") == 0)
148 saw_verbose_flag = 1;
149 else if (strncmp (argv[i], "-x", 2) == 0)
152 if (argv[i][2] != '\0')
154 else if ((argv[i+1]) != NULL)
155 /* We need to swallow arg on next loop. */
156 quote = arg = argv[i+1];
157 else /* Error condition, message will be printed later. */
160 && (strcmp (arg, "c++") == 0
161 || strcmp (arg, "c++-cpp-output") == 0
162 || strcmp (arg, "objective-c++") == 0
163 || strcmp (arg, "objective-c++-cpp-output") == 0))
168 else if (strcmp (argv[i], "-ObjC++") == 0)
174 /* Arguments that go directly to the linker might be .o files,
175 or something, and so might cause libstdc++ to be needed. */
176 else if (strcmp (argv[i], "-Xlinker") == 0)
182 else if (strncmp (argv[i], "-Wl,", 4) == 0)
183 library = (library == 0) ? 1 : library;
184 /* Unrecognized libraries (e.g. -lfoo) may require libstdc++. */
185 else if (strncmp (argv[i], "-l", 2) == 0)
186 library = (library == 0) ? 1 : library;
187 else if (((argv[i][2] == '\0'
188 && strchr ("bBVDUoeTuIYmLiA", argv[i][1]) != NULL)
189 || strcmp (argv[i], "-Tdata") == 0))
191 else if ((argv[i][2] == '\0'
192 && strchr ("cSEM", argv[i][1]) != NULL)
193 || strcmp (argv[i], "-MM") == 0
194 || strcmp (argv[i], "-fsyntax-only") == 0)
196 /* Don't specify libraries if we won't link, since that would
200 else if (strcmp (argv[i], "-static-libgcc") == 0
201 || strcmp (argv[i], "-static") == 0)
203 else if (DEFAULT_WORD_SWITCH_TAKES_ARG (&argv[i][1]))
206 /* Pass other options through. */
219 /* If the filename ends in .[chi], put options around it.
220 But not if a specified -x option is currently active. */
221 len = strlen (argv[i]);
223 && (argv[i][len - 1] == 'c'
224 || argv[i][len - 1] == 'i'
225 || argv[i][len - 1] == 'h')
226 && argv[i][len - 2] == '.')
232 /* If we don't know that this is a header file, we might
233 need to be linking in the libraries. */
236 if ((len <= 2 || strcmp (argv[i] + (len - 2), ".H") != 0)
237 && (len <= 2 || strcmp (argv[i] + (len - 2), ".h") != 0)
238 && (len <= 4 || strcmp (argv[i] + (len - 4), ".hpp") != 0)
239 && (len <= 3 || strcmp (argv[i] + (len - 3), ".hp") != 0)
240 && (len <= 4 || strcmp (argv[i] + (len - 4), ".hxx") != 0)
241 && (len <= 4 || strcmp (argv[i] + (len - 4), ".h++") != 0)
242 && (len <= 4 || strcmp (argv[i] + (len - 4), ".HPP") != 0)
243 && (len <= 4 || strcmp (argv[i] + (len - 4), ".tcc") != 0)
244 && (len <= 3 || strcmp (argv[i] + (len - 3), ".hh") != 0))
251 fatal ("argument to '%s' missing\n", quote);
253 /* There's no point adding -shared-libgcc if we don't have a shared
255 #ifndef ENABLE_SHARED_LIBGCC
259 /* Make sure to have room for the trailing NULL argument. */
260 num_args = argc + added + need_math + shared_libgcc + (library > 0) + 1;
261 arglist = XNEWVEC (const char *, num_args);
266 /* Copy the 0th argument, i.e., the name of the program itself. */
267 arglist[i++] = argv[j++];
269 /* NOTE: We start at 1 now, not 0. */
272 arglist[j] = argv[i];
274 /* Make sure -lstdc++ is before the math library, since libstdc++
275 itself uses those math routines. */
276 if (!saw_math && (args[i] & MATHLIB) && library > 0)
282 if (!saw_libc && (args[i] & WITHLIBC) && library > 0)
288 /* Wrap foo.[chi] files in a language specification to
289 force the gcc compiler driver to run cc1plus on them. */
290 if (args[i] & LANGSPEC)
292 int len = strlen (argv[i]);
293 switch (argv[i][len - 1])
296 arglist[j++] = "-xc++";
299 arglist[j++] = "-xc++-cpp-output";
302 arglist[j++] = "-xc++-header";
307 arglist[j++] = argv[i];
308 arglist[j] = "-xnone";
315 /* Add `-lstdc++' if we haven't already done so. */
318 arglist[j] = saw_profile_flag ? LIBSTDCXX_PROFILE : LIBSTDCXX;
319 if (arglist[j][0] != '-' || arglist[j][1] == 'l')
324 arglist[j++] = saw_math;
325 else if (library > 0 && need_math)
327 arglist[j] = saw_profile_flag ? MATH_LIBRARY_PROFILE : MATH_LIBRARY;
328 if (arglist[j][0] != '-' || arglist[j][1] == 'l')
333 arglist[j++] = saw_libc;
335 arglist[j++] = "-shared-libgcc";
341 *in_added_libraries = added_libraries;
344 /* Called before linking. Returns 0 on success and -1 on failure. */
345 int lang_specific_pre_link (void) /* Not used for C++. */
350 /* Number of extra output files that lang_specific_pre_link may generate. */
351 int lang_specific_extra_outfiles = 0; /* Not used for C++. */