1 /* Specific flags and argument handling of the C++ front end.
2 Copyright (C) 1996-2013 Free Software Foundation, Inc.
4 This file is part of GCC.
6 GCC 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 3, or (at your option)
11 GCC 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 GCC; see the file COPYING3. If not see
18 <http://www.gnu.org/licenses/>. */
22 #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)
33 /* Skip this option. */
34 #define SKIPOPT (1<<4)
37 #define MATH_LIBRARY "m"
39 #ifndef MATH_LIBRARY_PROFILE
40 #define MATH_LIBRARY_PROFILE MATH_LIBRARY
44 #define LIBSTDCXX "stdc++"
46 #ifndef LIBSTDCXX_PROFILE
47 #define LIBSTDCXX_PROFILE LIBSTDCXX
49 #ifndef LIBSTDCXX_STATIC
50 #define LIBSTDCXX_STATIC NULL
54 lang_specific_driver (struct cl_decoded_option
**in_decoded_options
,
55 unsigned int *in_decoded_options_count
,
56 int *in_added_libraries
)
60 /* If nonzero, the user gave us the `-p' or `-pg' flag. */
61 int saw_profile_flag
= 0;
63 /* What do with libstdc++:
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.
67 2 means libstdc++ is needed and should be linked statically. */
70 /* The number of arguments being added to what's in argv, other than
71 libraries. We use this to track the number of times we've inserted
75 /* The new argument list will be contained in this. */
76 struct cl_decoded_option
*new_decoded_options
;
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 struct cl_decoded_option
*saw_math
= NULL
;
86 /* "-lc" if it appears on the command line. */
87 const struct cl_decoded_option
*saw_libc
= NULL
;
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 saw -static. */
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 struct cl_decoded_option
*decoded_options
;
108 /* The number of libraries added in. */
111 /* The total number of arguments with the new stuff. */
112 unsigned int num_args
= 1;
114 argc
= *in_decoded_options_count
;
115 decoded_options
= *in_decoded_options
;
116 added_libraries
= *in_added_libraries
;
118 args
= XCNEWVEC (int, argc
);
120 for (i
= 1; i
< argc
; i
++)
122 const char *arg
= decoded_options
[i
].arg
;
123 if (decoded_options
[i
].errors
& CL_ERR_MISSING_ARG
)
124 continue; /* Avoid examining arguments of options missing them. */
126 switch (decoded_options
[i
].opt_index
)
129 case OPT_nodefaultlibs
:
134 if (strcmp (arg
, MATH_LIBRARY
) == 0)
139 else if (strcmp (arg
, "c") == 0)
142 /* Unrecognized libraries (e.g. -lfoo) may require libstdc++. */
143 library
= (library
== 0) ? 1 : library
;
153 && (strcmp (arg
, "c++") == 0
154 || strcmp (arg
, "c++-cpp-output") == 0
155 || strcmp (arg
, "objective-c++") == 0
156 || strcmp (arg
, "objective-c++-cpp-output") == 0))
164 /* Arguments that go directly to the linker might be .o files,
165 or something, and so might cause libstdc++ to be needed. */
175 case OPT_fsyntax_only
:
176 /* Don't specify libraries if we won't link, since that would
185 case OPT_static_libgcc
:
189 case OPT_static_libstdc__
:
190 library
= library
>= 0 ? 2 : library
;
194 case OPT_SPECIAL_input_file
:
198 /* We don't do this anymore, since we don't get them with minus
200 if (arg
[0] == '\0' || arg
[1] == '\0')
209 /* If the filename ends in .[chi], put options around it.
210 But not if a specified -x option is currently active. */
213 && (arg
[len
- 1] == 'c'
214 || arg
[len
- 1] == 'i'
215 || arg
[len
- 1] == 'h')
216 && arg
[len
- 2] == '.')
222 /* If we don't know that this is a header file, we might
223 need to be linking in the libraries. */
226 if ((len
<= 2 || strcmp (arg
+ (len
- 2), ".H") != 0)
227 && (len
<= 2 || strcmp (arg
+ (len
- 2), ".h") != 0)
228 && (len
<= 4 || strcmp (arg
+ (len
- 4), ".hpp") != 0)
229 && (len
<= 3 || strcmp (arg
+ (len
- 3), ".hp") != 0)
230 && (len
<= 4 || strcmp (arg
+ (len
- 4), ".hxx") != 0)
231 && (len
<= 4 || strcmp (arg
+ (len
- 4), ".h++") != 0)
232 && (len
<= 4 || strcmp (arg
+ (len
- 4), ".HPP") != 0)
233 && (len
<= 4 || strcmp (arg
+ (len
- 4), ".tcc") != 0)
234 && (len
<= 3 || strcmp (arg
+ (len
- 3), ".hh") != 0))
242 /* There's no point adding -shared-libgcc if we don't have a shared
244 #ifndef ENABLE_SHARED_LIBGCC
248 /* Add one for shared_libgcc or extra static library. */
249 num_args
= argc
+ added
+ need_math
+ (library
> 0) * 4 + 1;
250 new_decoded_options
= XNEWVEC (struct cl_decoded_option
, num_args
);
255 /* Copy the 0th argument, i.e., the name of the program itself. */
256 new_decoded_options
[j
++] = decoded_options
[i
++];
258 /* NOTE: We start at 1 now, not 0. */
261 new_decoded_options
[j
] = decoded_options
[i
];
263 /* Make sure -lstdc++ is before the math library, since libstdc++
264 itself uses those math routines. */
265 if (!saw_math
&& (args
[i
] & MATHLIB
) && library
> 0)
268 saw_math
= &decoded_options
[i
];
271 if (!saw_libc
&& (args
[i
] & WITHLIBC
) && library
> 0)
274 saw_libc
= &decoded_options
[i
];
277 /* Wrap foo.[chi] files in a language specification to
278 force the gcc compiler driver to run cc1plus on them. */
279 if (args
[i
] & LANGSPEC
)
281 const char *arg
= decoded_options
[i
].arg
;
282 int len
= strlen (arg
);
283 switch (arg
[len
- 1])
286 generate_option (OPT_x
, "c++", 1, CL_DRIVER
,
287 &new_decoded_options
[j
++]);
290 generate_option (OPT_x
, "c++-cpp-output", 1, CL_DRIVER
,
291 &new_decoded_options
[j
++]);
294 generate_option (OPT_x
, "c++-header", 1, CL_DRIVER
,
295 &new_decoded_options
[j
++]);
300 new_decoded_options
[j
++] = decoded_options
[i
];
301 generate_option (OPT_x
, "none", 1, CL_DRIVER
,
302 &new_decoded_options
[j
]);
305 if ((args
[i
] & SKIPOPT
) != 0)
312 /* Add `-lstdc++' if we haven't already done so. */
315 #ifdef HAVE_LD_STATIC_DYNAMIC
316 if (library
> 1 && !static_link
)
318 generate_option (OPT_Wl_
, LD_STATIC_OPTION
, 1, CL_DRIVER
,
319 &new_decoded_options
[j
]);
323 generate_option (OPT_l
,
324 saw_profile_flag
? LIBSTDCXX_PROFILE
: LIBSTDCXX
, 1,
325 CL_DRIVER
, &new_decoded_options
[j
]);
328 /* Add target-dependent static library, if necessary. */
329 if ((static_link
|| library
> 1) && LIBSTDCXX_STATIC
!= NULL
)
331 generate_option (OPT_l
, LIBSTDCXX_STATIC
, 1,
332 CL_DRIVER
, &new_decoded_options
[j
]);
336 #ifdef HAVE_LD_STATIC_DYNAMIC
337 if (library
> 1 && !static_link
)
339 generate_option (OPT_Wl_
, LD_DYNAMIC_OPTION
, 1, CL_DRIVER
,
340 &new_decoded_options
[j
]);
346 new_decoded_options
[j
++] = *saw_math
;
347 else if (library
> 0 && need_math
)
349 generate_option (OPT_l
,
350 saw_profile_flag
? MATH_LIBRARY_PROFILE
: MATH_LIBRARY
,
351 1, CL_DRIVER
, &new_decoded_options
[j
]);
356 new_decoded_options
[j
++] = *saw_libc
;
357 if (shared_libgcc
&& !static_link
)
358 generate_option (OPT_shared_libgcc
, NULL
, 1, CL_DRIVER
,
359 &new_decoded_options
[j
++]);
361 *in_decoded_options_count
= j
;
362 *in_decoded_options
= new_decoded_options
;
363 *in_added_libraries
= added_libraries
;
366 /* Called before linking. Returns 0 on success and -1 on failure. */
367 int lang_specific_pre_link (void) /* Not used for C++. */
372 /* Number of extra output files that lang_specific_pre_link may generate. */
373 int lang_specific_extra_outfiles
= 0; /* Not used for C++. */