1 /* d-spec.c -- Specific flags and argument handling of the D front end.
2 Copyright (C) 2006-2021 Free Software Foundation, Inc.
4 GCC is free software; you can redistribute it and/or modify
5 it under the terms of the GNU General Public License as published by
6 the Free Software Foundation; either version 3, or (at your option)
9 GCC is distributed in the hope that it will be useful,
10 but WITHOUT ANY WARRANTY; without even the implied warranty of
11 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
12 GNU General Public License for more details.
14 You should have received a copy of the GNU General Public License
15 along with GCC; see the file COPYING3. If not see
16 <http://www.gnu.org/licenses/>. */
20 #include "coretypes.h"
21 #include "opt-suggestions.h"
26 /* This bit is set if the arguments is a D source file. */
27 #define DSOURCE (1<<1)
28 /* This bit is set if they did `-lstdc++'. */
29 #define WITHLIBCXX (1<<2)
30 /* Skip this option. */
31 #define SKIPOPT (1<<3)
34 #define LIBSTDCXX "stdc++"
36 #ifndef LIBSTDCXX_PROFILE
37 #define LIBSTDCXX_PROFILE LIBSTDCXX
41 #define LIBPHOBOS "gphobos"
43 #ifndef LIBPHOBOS_PROFILE
44 #define LIBPHOBOS_PROFILE LIBPHOBOS
47 /* What do with libgphobos. */
50 /* libgphobos should not be linked in. */
52 /* libgphobos should be linked in if it is needed. */
54 /* libgphobos is needed and should be linked in. */
56 /* libgphobos is needed and should be linked statically. */
58 /* libgphobos is needed and should be linked dynamically. */
62 static phobos_action phobos_library
= PHOBOS_DEFAULT
;
64 /* If true, do load libgphobos.spec even if not needed otherwise. */
65 static bool need_spec
= false;
68 lang_specific_driver (cl_decoded_option
**in_decoded_options
,
69 unsigned int *in_decoded_options_count
,
70 int *in_added_libraries
)
74 /* If nonzero, the user gave us the `-p' or `-pg' flag. */
75 int saw_profile_flag
= 0;
77 /* If true, the user gave `-g'. Used by -debuglib. */
78 bool saw_debug_flag
= false;
80 /* The new argument list will be contained in this. */
81 cl_decoded_option
*new_decoded_options
;
83 /* "-lstdc++" if it appears on the command line. */
84 const cl_decoded_option
*saw_libcxx
= 0;
86 /* True if we saw `-static-libstdc++'. */
87 bool saw_static_libcxx
= false;
89 /* Whether we need the C++ STD library. */
90 bool need_stdcxx
= false;
92 /* True if we saw -static. */
93 bool static_link
= false;
95 /* True if we should add -shared-libgcc to the command-line. */
96 bool shared_libgcc
= true;
98 /* What default library to use instead of phobos. */
99 const char *defaultlib
= NULL
;
101 /* What debug library to use instead of phobos. */
102 const char *debuglib
= NULL
;
104 /* The total number of arguments with the new stuff. */
105 unsigned int num_args
= 1;
107 /* "-fonly" if it appears on the command line. */
108 const char *only_source_option
= 0;
110 /* Whether the -o option was used. */
111 bool saw_opt_o
= false;
113 /* Whether the -c option was used. Also used for -E, -fsyntax-only,
114 in general anything which implies only compilation and not linking. */
115 bool saw_opt_c
= false;
117 /* Whether the -S option was used. */
118 bool saw_opt_S
= false;
120 /* The first input file with an extension of .d. */
121 const char *first_d_file
= NULL
;
123 /* The total number of arguments with the new stuff. */
124 unsigned int argc
= *in_decoded_options_count
;
126 /* The argument list. */
127 cl_decoded_option
*decoded_options
= *in_decoded_options
;
129 /* The number of libraries added in. */
130 int added_libraries
= *in_added_libraries
;
132 /* An array used to flag each argument that needs a bit set for
133 DSOURCE, MATHLIB, WITHTHREAD, WITHLIBC or WITHLIBCXX. */
134 int *args
= XCNEWVEC (int, argc
);
136 for (i
= 1; i
< argc
; i
++)
138 const char *arg
= decoded_options
[i
].arg
;
139 const int value
= decoded_options
[i
].value
;
141 switch (decoded_options
[i
].opt_index
)
143 case OPT_dstartfiles
:
148 case OPT_nodefaultlibs
:
149 phobos_library
= PHOBOS_NOLINK
;
152 case OPT_nophoboslib
:
153 phobos_library
= PHOBOS_NOLINK
;
159 phobos_library
= PHOBOS_NOLINK
;
161 phobos_library
= PHOBOS_LINK
;
164 case OPT_defaultlib_
:
165 if (defaultlib
!= NULL
)
166 free (CONST_CAST (char *, defaultlib
));
170 defaultlib
= XNEWVEC (char, strlen (arg
));
171 strcpy (CONST_CAST (char *, defaultlib
), arg
);
176 if (debuglib
!= NULL
)
177 free (CONST_CAST (char *, debuglib
));
181 debuglib
= XNEWVEC (char, strlen (arg
));
182 strcpy (CONST_CAST (char *, debuglib
), arg
);
187 if ((strcmp (arg
, LIBSTDCXX
) == 0)
188 || (strcmp (arg
, LIBSTDCXX_PROFILE
) == 0))
190 args
[i
] |= WITHLIBCXX
;
193 /* Unrecognized libraries (e.g. -ltango) may require libphobos. */
194 else if (phobos_library
== PHOBOS_DEFAULT
)
195 phobos_library
= PHOBOS_LINK
;
204 saw_debug_flag
= true;
208 /* If they only gave us `-v', don't try to link in libphobos. */
210 phobos_library
= PHOBOS_NOLINK
;
214 if (phobos_library
== PHOBOS_DEFAULT
&& (strcmp (arg
, "d") == 0))
215 phobos_library
= PHOBOS_LINK
;
220 /* Arguments that go directly to the linker might be .o files
221 or something, and so might cause libphobos to be needed. */
222 if (phobos_library
== PHOBOS_DEFAULT
)
223 phobos_library
= PHOBOS_LINK
;
230 case OPT_fsyntax_only
:
231 /* Don't specify libaries if we won't link, since that would
234 phobos_library
= PHOBOS_NOLINK
;
239 phobos_library
= PHOBOS_NOLINK
;
250 case OPT_static_libgcc
:
251 shared_libgcc
= false;
254 case OPT_static_libstdc__
:
255 saw_static_libcxx
= true;
259 case OPT_static_libphobos
:
260 if (phobos_library
!= PHOBOS_NOLINK
)
261 phobos_library
= PHOBOS_STATIC
;
265 case OPT_shared_libphobos
:
266 if (phobos_library
!= PHOBOS_NOLINK
)
267 phobos_library
= PHOBOS_DYNAMIC
;
273 only_source_option
= decoded_options
[i
].orig_option_with_args_text
;
277 const char *suffix
= strrchr (only_source_option
, '.');
278 if (suffix
== NULL
|| strcmp (suffix
, ".d") != 0)
279 only_source_option
= concat (only_source_option
, ".d", NULL
);
283 case OPT_SPECIAL_input_file
:
285 if (arg
[0] == '\0' || arg
[1] == '\0')
288 if (phobos_library
== PHOBOS_DEFAULT
)
289 phobos_library
= PHOBOS_LINK
;
291 /* Record that this is a D source file. */
292 const char *suffix
= strrchr (arg
, '.');
293 if (suffix
!= NULL
&& strcmp (suffix
, ".d") == 0)
295 if (first_d_file
== NULL
)
301 /* If this is a C++ source file, we'll need to link
302 against libstdc++ library. */
304 && (strcmp (suffix
, ".cc") == 0
305 || (strcmp (suffix
, ".cpp") == 0)
306 || (strcmp (suffix
, ".c++") == 0)))
314 /* There's no point adding -shared-libgcc if we don't have a shared
316 #ifndef ENABLE_SHARED_LIBGCC
317 shared_libgcc
= false;
320 /* Make sure to have room for the trailing NULL argument.
321 - need_stdcxx might add `-lstdcxx'
322 - libphobos adds `-Bstatic -lphobos -Bdynamic'
323 - only_source adds 1 more arg, also maybe add `-o'. */
324 num_args
= argc
+ need_stdcxx
+ shared_libgcc
325 + (phobos_library
!= PHOBOS_NOLINK
) * 4 + 2;
326 new_decoded_options
= XNEWVEC (cl_decoded_option
, num_args
);
331 /* Copy the 0th argument, i.e., the name of the program itself. */
332 new_decoded_options
[j
++] = decoded_options
[i
++];
334 /* NOTE: We start at 1 now, not 0. */
337 if (args
[i
] & SKIPOPT
)
343 new_decoded_options
[j
] = decoded_options
[i
];
345 if (!saw_libcxx
&& (args
[i
] & WITHLIBCXX
))
348 saw_libcxx
= &decoded_options
[i
];
351 if (args
[i
] & DSOURCE
)
353 if (only_source_option
)
361 if (only_source_option
)
363 const char *only_source_arg
= only_source_option
+ 7;
364 generate_option (OPT_fonly_
, only_source_arg
, 1, CL_DRIVER
,
365 &new_decoded_options
[j
]);
368 generate_option_input_file (only_source_arg
,
369 &new_decoded_options
[j
++]);
372 /* If no reason to link against libphobos library, then don't add it. */
373 if (phobos_library
== PHOBOS_DEFAULT
)
374 phobos_library
= PHOBOS_NOLINK
;
376 /* If we didn't see a -o option, add one. This is because we need the
377 driver to pass all .d files to the D compiler. Without a -o option
378 the driver will invoke the compiler separately for each input file. */
379 if (first_d_file
!= NULL
&& !saw_opt_o
)
381 if (saw_opt_c
|| saw_opt_S
)
383 const char *base
= lbasename (first_d_file
);
384 int baselen
= strlen (base
) - 2;
385 char *out
= XNEWVEC (char, baselen
+ 3);
387 memcpy (out
, base
, baselen
);
388 /* The driver will convert .o to some other suffix if appropriate. */
391 out
[baselen
+ 1] = 's';
393 out
[baselen
+ 1] = 'o';
394 out
[baselen
+ 2] = '\0';
395 generate_option (OPT_o
, out
, 1, CL_DRIVER
,
396 &new_decoded_options
[j
]);
400 /* Wouldn't be necessary if the driver converted .out also. */
401 const char *out
= NULL
;
403 #ifdef TARGET_EXECUTABLE_SUFFIX
404 if (TARGET_EXECUTABLE_SUFFIX
[0] != 0)
405 out
= "a" TARGET_EXECUTABLE_SUFFIX
;
410 generate_option (OPT_o
, out
, 1, CL_DRIVER
,
411 &new_decoded_options
[j
]);
416 /* Add `-lgphobos' if we haven't already done so. */
417 if (phobos_library
!= PHOBOS_NOLINK
)
419 /* Default to static linking. */
420 if (phobos_library
!= PHOBOS_DYNAMIC
)
421 phobos_library
= PHOBOS_STATIC
;
423 #ifdef HAVE_LD_STATIC_DYNAMIC
424 if (phobos_library
== PHOBOS_STATIC
&& !static_link
)
426 generate_option (OPT_Wl_
, LD_STATIC_OPTION
, 1, CL_DRIVER
,
427 &new_decoded_options
[j
++]);
430 /* Order of precedence in determining what library to link against is:
431 - `-l<lib>' from `-debuglib=<lib>' if `-g' was also seen.
432 - `-l<lib>' from `-defaultlib=<lib>'.
433 - `-lgphobos' unless `-nophoboslib' or `-fno-druntime' was seen. */
434 if (debuglib
&& saw_debug_flag
)
436 generate_option (OPT_l
, debuglib
, 1, CL_DRIVER
,
437 &new_decoded_options
[j
++]);
442 generate_option (OPT_l
, defaultlib
, 1, CL_DRIVER
,
443 &new_decoded_options
[j
++]);
448 generate_option (OPT_l
,
449 saw_profile_flag
? LIBPHOBOS_PROFILE
: LIBPHOBOS
, 1,
450 CL_DRIVER
, &new_decoded_options
[j
++]);
454 #ifdef HAVE_LD_STATIC_DYNAMIC
455 if (phobos_library
== PHOBOS_STATIC
&& !static_link
)
457 generate_option (OPT_Wl_
, LD_DYNAMIC_OPTION
, 1, CL_DRIVER
,
458 &new_decoded_options
[j
++]);
463 if (saw_libcxx
|| need_stdcxx
)
465 #ifdef HAVE_LD_STATIC_DYNAMIC
466 if (saw_static_libcxx
&& !static_link
)
468 generate_option (OPT_Wl_
, LD_STATIC_OPTION
, 1, CL_DRIVER
,
469 &new_decoded_options
[j
++]);
472 /* Push the -static-libstdc++ option back onto the command so that
473 a target without LD_STATIC_DYNAMIC can use outfile substitution. */
474 if (saw_static_libcxx
&& !static_link
)
475 generate_option (OPT_static_libstdc__
, NULL
, 1, CL_DRIVER
,
476 &new_decoded_options
[j
++]);
479 new_decoded_options
[j
++] = *saw_libcxx
;
480 else if (need_stdcxx
)
482 generate_option (OPT_l
,
486 1, CL_DRIVER
, &new_decoded_options
[j
++]);
489 #ifdef HAVE_LD_STATIC_DYNAMIC
490 if (saw_static_libcxx
&& !static_link
)
492 generate_option (OPT_Wl_
, LD_DYNAMIC_OPTION
, 1, CL_DRIVER
,
493 &new_decoded_options
[j
++]);
498 if (shared_libgcc
&& !static_link
)
500 generate_option (OPT_shared_libgcc
, NULL
, 1, CL_DRIVER
,
501 &new_decoded_options
[j
++]);
504 *in_decoded_options_count
= j
;
505 *in_decoded_options
= new_decoded_options
;
506 *in_added_libraries
= added_libraries
;
509 /* Called before linking. Returns 0 on success and -1 on failure. */
512 lang_specific_pre_link (void)
514 if ((phobos_library
!= PHOBOS_NOLINK
) || need_spec
)
515 do_spec ("%:include(libgphobos.spec)");
520 /* Number of extra output files that lang_specific_pre_link may generate. */
522 int lang_specific_extra_outfiles
= 0; /* Not used for D. */