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, 2008 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
47 #ifndef LIBSTDCXX_STATIC
48 #define LIBSTDCXX_STATIC NULL
52 lang_specific_driver (int *in_argc
, const char *const **in_argv
,
53 int *in_added_libraries
)
57 /* If nonzero, the user gave us the `-p' or `-pg' flag. */
58 int saw_profile_flag
= 0;
60 /* If nonzero, the user gave us the `-v' flag. */
61 int saw_verbose_flag
= 0;
63 /* This is a tristate:
64 -1 means we should not link in libstdc++
65 0 means we should link in libstdc++ if it is needed
66 1 means libstdc++ is needed and should be linked in. */
69 /* The number of arguments being added to what's in argv, other than
70 libraries. We use this to track the number of times we've inserted
74 /* Used to track options that take arguments, so we don't go wrapping
75 those with -xc++/-xnone. */
76 const char *quote
= NULL
;
78 /* The new argument list will be contained in this. */
81 /* Nonzero if we saw a `-xfoo' language specification on the
82 command line. Used to avoid adding our own -xc++ if the user
83 already gave a language for the file. */
86 /* "-lm" or "-lmath" if it appears on the command line. */
87 const char *saw_math
= 0;
89 /* "-lc" if it appears on the command line. */
90 const char *saw_libc
= 0;
92 /* An array used to flag each argument that needs a bit set for
93 LANGSPEC, MATHLIB, or WITHLIBC. */
96 /* By default, we throw on the math library if we have one. */
97 int need_math
= (MATH_LIBRARY
[0] != '\0');
99 /* True if we should add -shared-libgcc to the command-line. */
100 int shared_libgcc
= 1;
102 /* The total number of arguments with the new stuff. */
105 /* The argument list. */
106 const char *const *argv
;
108 /* The number of libraries added in. */
111 /* The total number of arguments with the new stuff. */
116 added_libraries
= *in_added_libraries
;
118 args
= XCNEWVEC (int, argc
);
120 for (i
= 1; i
< argc
; i
++)
122 /* If the previous option took an argument, we swallow it here. */
129 /* We don't do this anymore, since we don't get them with minus
131 if (argv
[i
][0] == '\0' || argv
[i
][1] == '\0')
134 if (argv
[i
][0] == '-')
136 if (strcmp (argv
[i
], "-nostdlib") == 0
137 || strcmp (argv
[i
], "-nodefaultlibs") == 0)
141 else if (strcmp (argv
[i
], MATH_LIBRARY
) == 0)
146 else if (strcmp (argv
[i
], "-lc") == 0)
148 else if (strcmp (argv
[i
], "-pg") == 0 || strcmp (argv
[i
], "-p") == 0)
150 else if (strcmp (argv
[i
], "-v") == 0)
151 saw_verbose_flag
= 1;
152 else if (strncmp (argv
[i
], "-x", 2) == 0)
155 if (argv
[i
][2] != '\0')
157 else if ((argv
[i
+1]) != NULL
)
158 /* We need to swallow arg on next loop. */
159 quote
= arg
= argv
[i
+1];
160 else /* Error condition, message will be printed later. */
163 && (strcmp (arg
, "c++") == 0
164 || strcmp (arg
, "c++-cpp-output") == 0
165 || strcmp (arg
, "objective-c++") == 0
166 || strcmp (arg
, "objective-c++-cpp-output") == 0))
171 else if (strcmp (argv
[i
], "-ObjC++") == 0)
177 /* Arguments that go directly to the linker might be .o files,
178 or something, and so might cause libstdc++ to be needed. */
179 else if (strcmp (argv
[i
], "-Xlinker") == 0)
185 else if (strncmp (argv
[i
], "-Wl,", 4) == 0)
186 library
= (library
== 0) ? 1 : library
;
187 /* Unrecognized libraries (e.g. -lfoo) may require libstdc++. */
188 else if (strncmp (argv
[i
], "-l", 2) == 0)
189 library
= (library
== 0) ? 1 : library
;
190 else if (((argv
[i
][2] == '\0'
191 && strchr ("bBVDUoeTuIYmLiA", argv
[i
][1]) != NULL
)
192 || strcmp (argv
[i
], "-Tdata") == 0))
194 else if ((argv
[i
][2] == '\0'
195 && strchr ("cSEM", argv
[i
][1]) != NULL
)
196 || strcmp (argv
[i
], "-MM") == 0
197 || strcmp (argv
[i
], "-fsyntax-only") == 0)
199 /* Don't specify libraries if we won't link, since that would
203 else if (strcmp (argv
[i
], "-static-libgcc") == 0
204 || strcmp (argv
[i
], "-static") == 0)
206 else if (DEFAULT_WORD_SWITCH_TAKES_ARG (&argv
[i
][1]))
209 /* Pass other options through. */
222 /* If the filename ends in .[chi], put options around it.
223 But not if a specified -x option is currently active. */
224 len
= strlen (argv
[i
]);
226 && (argv
[i
][len
- 1] == 'c'
227 || argv
[i
][len
- 1] == 'i'
228 || argv
[i
][len
- 1] == 'h')
229 && argv
[i
][len
- 2] == '.')
235 /* If we don't know that this is a header file, we might
236 need to be linking in the libraries. */
239 if ((len
<= 2 || strcmp (argv
[i
] + (len
- 2), ".H") != 0)
240 && (len
<= 2 || strcmp (argv
[i
] + (len
- 2), ".h") != 0)
241 && (len
<= 4 || strcmp (argv
[i
] + (len
- 4), ".hpp") != 0)
242 && (len
<= 3 || strcmp (argv
[i
] + (len
- 3), ".hp") != 0)
243 && (len
<= 4 || strcmp (argv
[i
] + (len
- 4), ".hxx") != 0)
244 && (len
<= 4 || strcmp (argv
[i
] + (len
- 4), ".h++") != 0)
245 && (len
<= 4 || strcmp (argv
[i
] + (len
- 4), ".HPP") != 0)
246 && (len
<= 4 || strcmp (argv
[i
] + (len
- 4), ".tcc") != 0)
247 && (len
<= 3 || strcmp (argv
[i
] + (len
- 3), ".hh") != 0))
254 fatal ("argument to '%s' missing\n", quote
);
256 /* There's no point adding -shared-libgcc if we don't have a shared
258 #ifndef ENABLE_SHARED_LIBGCC
262 /* Make sure to have room for the trailing NULL argument.
263 Add one for shared_libgcc or extra static library. */
264 num_args
= argc
+ added
+ need_math
+ (library
> 0) + 2;
265 arglist
= XNEWVEC (const char *, num_args
);
270 /* Copy the 0th argument, i.e., the name of the program itself. */
271 arglist
[i
++] = argv
[j
++];
273 /* NOTE: We start at 1 now, not 0. */
276 arglist
[j
] = argv
[i
];
278 /* Make sure -lstdc++ is before the math library, since libstdc++
279 itself uses those math routines. */
280 if (!saw_math
&& (args
[i
] & MATHLIB
) && library
> 0)
286 if (!saw_libc
&& (args
[i
] & WITHLIBC
) && library
> 0)
292 /* Wrap foo.[chi] files in a language specification to
293 force the gcc compiler driver to run cc1plus on them. */
294 if (args
[i
] & LANGSPEC
)
296 int len
= strlen (argv
[i
]);
297 switch (argv
[i
][len
- 1])
300 arglist
[j
++] = "-xc++";
303 arglist
[j
++] = "-xc++-cpp-output";
306 arglist
[j
++] = "-xc++-header";
311 arglist
[j
++] = argv
[i
];
312 arglist
[j
] = "-xnone";
319 /* Add `-lstdc++' if we haven't already done so. */
322 arglist
[j
] = saw_profile_flag
? LIBSTDCXX_PROFILE
: LIBSTDCXX
;
323 if (arglist
[j
][0] != '-' || arglist
[j
][1] == 'l')
327 /* Add target-dependent static library, if necessary. */
328 if (shared_libgcc
== 0 && LIBSTDCXX_STATIC
!= NULL
)
330 arglist
[j
] = LIBSTDCXX_STATIC
;
331 if (arglist
[j
][0] != '-' || arglist
[j
][1] == 'l')
336 arglist
[j
++] = saw_math
;
337 else if (library
> 0 && need_math
)
339 arglist
[j
] = saw_profile_flag
? MATH_LIBRARY_PROFILE
: MATH_LIBRARY
;
340 if (arglist
[j
][0] != '-' || arglist
[j
][1] == 'l')
345 arglist
[j
++] = saw_libc
;
347 arglist
[j
++] = "-shared-libgcc";
353 *in_added_libraries
= added_libraries
;
356 /* Called before linking. Returns 0 on success and -1 on failure. */
357 int lang_specific_pre_link (void) /* Not used for C++. */
362 /* Number of extra output files that lang_specific_pre_link may generate. */
363 int lang_specific_extra_outfiles
= 0; /* Not used for C++. */