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comparison gcc/config/darwin-driver.c @ 0:a06113de4d67

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author kent <kent@cr.ie.u-ryukyu.ac.jp>
date Fri, 17 Jul 2009 14:47:48 +0900
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children f6334be47118
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-1:000000000000 0:a06113de4d67
1 /* Additional functions for the GCC driver on Darwin native.
2 Copyright (C) 2006, 2007, 2008 Free Software Foundation, Inc.
3 Contributed by Apple Computer Inc.
4
5 This file is part of GCC.
6
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)
10 any later version.
11
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.
16
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/>. */
20
21 #ifndef CROSS_DIRECTORY_STRUCTURE
22 #include "config.h"
23 #include "system.h"
24 #include "coretypes.h"
25 #include "tm.h"
26 #include "gcc.h"
27 #include <sys/sysctl.h>
28 #include "xregex.h"
29
30 #ifndef SWITCH_TAKES_ARG
31 #define SWITCH_TAKES_ARG(CHAR) DEFAULT_SWITCH_TAKES_ARG(CHAR)
32 #endif
33
34 #ifndef WORD_SWITCH_TAKES_ARG
35 #define WORD_SWITCH_TAKES_ARG(STR) DEFAULT_WORD_SWITCH_TAKES_ARG (STR)
36 #endif
37
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. */
41
42 void
43 darwin_default_min_version (int * argc_p, char *** argv_p)
44 {
45 const int argc = *argc_p;
46 char ** const argv = *argv_p;
47 int i;
48 char osversion[32];
49 size_t osversion_len = sizeof (osversion) - 1;
50 static int osversion_name[2] = { CTL_KERN, KERN_OSRELEASE };
51 char * version_p;
52 char * version_pend;
53 int major_vers;
54 char minor_vers[6];
55 static char new_flag[sizeof ("-mmacosx-version-min=10.0.0") + 6];
56
57 /* If the command-line is empty, just return. */
58 if (argc <= 1)
59 return;
60 /* Don't do this if the user has specified -b or -V at the start
61 of the command-line. */
62 if (argv[1][0] == '-'
63 && (argv[1][1] == 'V' ||
64 ((argv[1][1] == 'b') && (NULL != strchr(argv[1] + 2,'-')))))
65 return;
66
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] == '-')
71 {
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)
75 return;
76
77 /* It doesn't count if it's an argument to a different switch. */
78 if (p[0] == '-'
79 && ((SWITCH_TAKES_ARG (p[1]) > (p[2] != 0))
80 || WORD_SWITCH_TAKES_ARG (p + 1)))
81 i++;
82 }
83
84 /* Retrieve the deployment target from the environment and insert
85 it as a flag. */
86 {
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])
94 {
95 ++*argc_p;
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 *));
101 return;
102 }
103 }
104
105 /* Determine the version of the running OS. If we can't, warn user,
106 and do nothing. */
107 if (sysctl (osversion_name, ARRAY_SIZE (osversion_name), osversion,
108 &osversion_len, NULL, 0) == -1)
109 {
110 fprintf (stderr, "sysctl for kern.osversion failed: %s\n",
111 xstrerror (errno));
112 return;
113 }
114
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]))
118 goto parse_failed;
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)
124 goto parse_failed;
125 if (*version_p++ != '.')
126 goto parse_failed;
127 version_pend = strchr(version_p, '.');
128 if (!version_pend)
129 goto parse_failed;
130 if (! ISDIGIT (*version_p))
131 goto parse_failed;
132 strncpy(minor_vers, version_p, version_pend - version_p);
133 minor_vers[version_pend - version_p] = '\0';
134
135 /* The major kernel version number is 4 plus the second OS version
136 component. */
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);
141 else
142 sprintf (new_flag, "-mmacosx-version-min=10.%d.%s", major_vers - 4,
143 minor_vers);
144
145 /* Add the new flag. */
146 ++*argc_p;
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 *));
151 return;
152
153 parse_failed:
154 fprintf (stderr, "couldn't understand kern.osversion `%.*s'\n",
155 (int) osversion_len, osversion);
156 return;
157 }
158
159 #endif /* CROSS_DIRECTORY_STRUCTURE */