1 /* Additional functions for the GCC driver on Darwin native.
2 Copyright (C) 2006, 2007 Free Software Foundation, Inc.
3 Contributed by Apple Computer 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/>. */
21 #ifndef CROSS_DIRECTORY_STRUCTURE
24 #include "coretypes.h"
27 #include <sys/sysctl.h>
30 #ifndef SWITCH_TAKES_ARG
31 #define SWITCH_TAKES_ARG(CHAR) DEFAULT_SWITCH_TAKES_ARG(CHAR)
34 #ifndef WORD_SWITCH_TAKES_ARG
35 #define WORD_SWITCH_TAKES_ARG(STR) DEFAULT_WORD_SWITCH_TAKES_ARG (STR)
38 /* When running on a Darwin system and using that system's headers and
39 libraries, default the -mmacosx-version-min flag to be the version
40 of the system on which the compiler is running. */
43 darwin_default_min_version (int * argc_p
, char *** argv_p
)
45 const int argc
= *argc_p
;
46 char ** const argv
= *argv_p
;
49 size_t osversion_len
= sizeof (osversion
) - 1;
50 static int osversion_name
[2] = { CTL_KERN
, KERN_OSRELEASE
};
55 static char new_flag
[sizeof ("-mmacosx-version-min=10.0.0") + 6];
57 /* If the command-line is empty, just return. */
60 /* Don't do this if the user has specified -b or -V at the start
61 of the command-line. */
63 && (argv
[1][1] == 'V' ||
64 ((argv
[1][1] == 'b') && (NULL
!= strchr(argv
[1] + 2,'-')))))
67 /* Don't do this if the user specified -mmacosx-version-min= or
68 -mno-macosx-version-min. */
69 for (i
= 1; i
< argc
; i
++)
70 if (argv
[i
][0] == '-')
72 const char * const p
= argv
[i
];
73 if (strncmp (p
, "-mno-macosx-version-min", 23) == 0
74 || strncmp (p
, "-mmacosx-version-min", 20) == 0)
77 /* It doesn't count if it's an argument to a different switch. */
79 && ((SWITCH_TAKES_ARG (p
[1]) > (p
[2] != 0))
80 || WORD_SWITCH_TAKES_ARG (p
+ 1)))
84 /* Retrieve the deployment target from the environment and insert
87 const char * macosx_deployment_target
;
88 macosx_deployment_target
= getenv ("MACOSX_DEPLOYMENT_TARGET");
89 if (macosx_deployment_target
90 /* Apparently, an empty string for MACOSX_DEPLOYMENT_TARGET means
91 "use the default". Or, possibly "use 10.1". We choose
92 to ignore the environment variable, as if it was never set. */
93 && macosx_deployment_target
[0])
96 *argv_p
= XNEWVEC (char *, *argc_p
);
97 (*argv_p
)[0] = argv
[0];
98 (*argv_p
)[1] = concat ("-mmacosx-version-min=",
99 macosx_deployment_target
, NULL
);
100 memcpy (*argv_p
+ 2, argv
+ 1, (argc
- 1) * sizeof (char *));
105 /* Determine the version of the running OS. If we can't, warn user,
107 if (sysctl (osversion_name
, ARRAY_SIZE (osversion_name
), osversion
,
108 &osversion_len
, NULL
, 0) == -1)
110 fprintf (stderr
, "sysctl for kern.osversion failed: %s\n",
115 /* Try to parse the first two parts of the OS version number. Warn
116 user and return if it doesn't make sense. */
117 if (! ISDIGIT (osversion
[0]))
119 major_vers
= osversion
[0] - '0';
120 version_p
= osversion
+ 1;
121 if (ISDIGIT (*version_p
))
122 major_vers
= major_vers
* 10 + (*version_p
++ - '0');
123 if (major_vers
> 4 + 9)
125 if (*version_p
++ != '.')
127 version_pend
= strchr(version_p
, '.');
130 if (! ISDIGIT (*version_p
))
132 strncpy(minor_vers
, version_p
, version_pend
- version_p
);
133 minor_vers
[version_pend
- version_p
] = '\0';
135 /* The major kernel version number is 4 plus the second OS version
137 if (major_vers
- 4 <= 4)
138 /* On 10.4 and earlier, the old linker is used which does not
139 support three-component system versions. */
140 sprintf (new_flag
, "-mmacosx-version-min=10.%d", major_vers
- 4);
142 sprintf (new_flag
, "-mmacosx-version-min=10.%d.%s", major_vers
- 4,
145 /* Add the new flag. */
147 *argv_p
= XNEWVEC (char *, *argc_p
);
148 (*argv_p
)[0] = argv
[0];
149 (*argv_p
)[1] = new_flag
;
150 memcpy (*argv_p
+ 2, argv
+ 1, (argc
- 1) * sizeof (char *));
154 fprintf (stderr
, "couldn't understand kern.osversion `%.*s'\n",
155 (int) osversion_len
, osversion
);
159 #endif /* CROSS_DIRECTORY_STRUCTURE */