1 /* Specific flags and argument handling of the C++ front-end.
2 Copyright (C) 1996, 1997, 1998, 1999 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"
37 #define LIBSTDCXX "-lstdc++"
41 lang_specific_driver (in_argc
, in_argv
, in_added_libraries
)
44 int *in_added_libraries
;
48 /* If non-zero, the user gave us the `-v' flag. */
49 int saw_verbose_flag
= 0;
51 /* This will be 0 if we encounter a situation where we should not
55 /* The number of arguments being added to what's in argv, other than
56 libraries. We use this to track the number of times we've inserted
60 /* Used to track options that take arguments, so we don't go wrapping
61 those with -xc++/-xnone. */
62 const char *quote
= NULL
;
64 /* The new argument list will be contained in this. */
68 /* Non-zero if we saw a `-xfoo' language specification on the
69 command line. Used to avoid adding our own -xc++ if the user
70 already gave a language for the file. */
73 /* "-lm" or "-lmath" if it appears on the command line. */
74 const char *saw_math
= 0;
76 /* "-lc" if it appears on the command line. */
77 const char *saw_libc
= 0;
79 /* An array used to flag each argument that needs a bit set for
80 LANGSPEC, MATHLIB, or WITHLIBC. */
83 /* By default, we throw on the math library if we have one. */
84 int need_math
= (MATH_LIBRARY
[0] != '\0');
86 /* The total number of arguments with the new stuff. */
89 /* The argument list. */
92 /* The number of libraries added in. */
95 /* The total number of arguments with the new stuff. */
100 added_libraries
= *in_added_libraries
;
102 args
= (int *) xcalloc (argc
, sizeof (int));
104 for (i
= 1; i
< argc
; i
++)
106 /* If the previous option took an argument, we swallow it here. */
113 /* We don't do this anymore, since we don't get them with minus
115 if (argv
[i
][0] == '\0' || argv
[i
][1] == '\0')
118 if (argv
[i
][0] == '-')
120 if (library
!= 0 && (strcmp (argv
[i
], "-nostdlib") == 0
121 || strcmp (argv
[i
], "-nodefaultlibs") == 0))
125 else if (strcmp (argv
[i
], "-lm") == 0
126 || strcmp (argv
[i
], "-lmath") == 0
127 || strcmp (argv
[i
], MATH_LIBRARY
) == 0
129 || strcmp (argv
[i
], ALT_LIBM
) == 0
136 else if (strcmp (argv
[i
], "-lc") == 0)
138 else if (strcmp (argv
[i
], "-v") == 0)
140 saw_verbose_flag
= 1;
143 /* If they only gave us `-v', don't try to link
148 else if (strncmp (argv
[i
], "-x", 2) == 0)
150 else if (((argv
[i
][2] == '\0'
151 && (char *)strchr ("bBVDUoeTuIYmLiA", argv
[i
][1]) != NULL
)
152 || strcmp (argv
[i
], "-Tdata") == 0))
154 else if (library
!= 0 && ((argv
[i
][2] == '\0'
155 && (char *) strchr ("cSEM", argv
[i
][1]) != NULL
)
156 || strcmp (argv
[i
], "-MM") == 0))
158 /* Don't specify libraries if we won't link, since that would
164 /* Pass other options through. */
177 /* If the filename ends in .c or .i, put options around it.
178 But not if a specified -x option is currently active. */
179 len
= strlen (argv
[i
]);
181 && (argv
[i
][len
- 1] == 'c' || argv
[i
][len
- 1] == 'i')
182 && argv
[i
][len
- 2] == '.')
191 fatal ("argument to `%s' missing\n", quote
);
193 /* If we know we don't have to do anything, bail now. */
194 if (! added
&& ! library
)
200 /* Make sure to have room for the trailing NULL argument. */
201 num_args
= argc
+ added
+ need_math
+ 1;
202 real_arglist
= (char **) xmalloc (num_args
* sizeof (char *));
203 arglist
= (const char **) real_arglist
;
205 /* NOTE: We start at 1 now, not 0. */
206 for (i
= 0, j
= 0; i
< argc
; i
++, j
++)
208 arglist
[j
] = argv
[i
];
210 /* Make sure -lstdc++ is before the math library, since libstdc++
211 itself uses those math routines. */
212 if (!saw_math
&& (args
[i
] & MATHLIB
) && library
)
218 if (!saw_libc
&& (args
[i
] & WITHLIBC
) && library
)
224 /* Wrap foo.c and foo.i files in a language specification to
225 force the gcc compiler driver to run cc1plus on them. */
226 if (args
[i
] & LANGSPEC
)
228 int len
= strlen (argv
[i
]);
229 if (argv
[i
][len
- 1] == 'i')
230 arglist
[j
++] = "-xc++-cpp-output";
232 arglist
[j
++] = "-xc++";
233 arglist
[j
++] = argv
[i
];
234 arglist
[j
] = "-xnone";
238 /* Add `-lstdc++' if we haven't already done so. */
241 arglist
[j
++] = LIBSTDCXX
;
245 arglist
[j
++] = saw_math
;
246 else if (library
&& need_math
)
248 arglist
[j
++] = MATH_LIBRARY
;
252 arglist
[j
++] = saw_libc
;
257 *in_argv
= real_arglist
;
258 *in_added_libraries
= added_libraries
;
261 /* Called before linking. Returns 0 on success and -1 on failure. */
262 int lang_specific_pre_link () /* Not used for C++. */
267 /* Number of extra output files that lang_specific_pre_link may generate. */
268 int lang_specific_extra_outfiles
= 0; /* Not used for C++. */