1 /* Additional functions for the GCC driver on Darwin native.
2 Copyright (C) 2006, 2007, 2008, 2010 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 /* When running on a Darwin system and using that system's headers and
31 libraries, default the -mmacosx-version-min flag to be the version
32 of the system on which the compiler is running. */
35 darwin_default_min_version (int * argc_p, char *** argv_p)
37 const int argc = *argc_p;
38 char ** const argv = *argv_p;
41 size_t osversion_len = sizeof (osversion) - 1;
42 static int osversion_name[2] = { CTL_KERN, KERN_OSRELEASE };
47 static char new_flag[sizeof ("-mmacosx-version-min=10.0.0") + 6];
49 /* If the command-line is empty, just return. */
52 /* Don't do this if the user has specified -b or -V at the start
53 of the command-line. */
55 && (argv[1][1] == 'V' ||
56 ((argv[1][1] == 'b') && (NULL != strchr(argv[1] + 2,'-')))))
59 /* Don't do this if the user specified -mmacosx-version-min= or
60 -mno-macosx-version-min. */
61 for (i = 1; i < argc; i++)
62 if (argv[i][0] == '-')
64 const char * const p = argv[i];
65 if (strncmp (p, "-mno-macosx-version-min", 23) == 0
66 || strncmp (p, "-mmacosx-version-min", 20) == 0)
69 /* It doesn't count if it's an argument to a different switch. */
71 && ((SWITCH_TAKES_ARG (p[1]) > (p[2] != 0))
72 || WORD_SWITCH_TAKES_ARG (p + 1)))
76 /* Retrieve the deployment target from the environment and insert
79 const char * macosx_deployment_target;
80 macosx_deployment_target = getenv ("MACOSX_DEPLOYMENT_TARGET");
81 if (macosx_deployment_target
82 /* Apparently, an empty string for MACOSX_DEPLOYMENT_TARGET means
83 "use the default". Or, possibly "use 10.1". We choose
84 to ignore the environment variable, as if it was never set. */
85 && macosx_deployment_target[0])
88 *argv_p = XNEWVEC (char *, *argc_p);
89 (*argv_p)[0] = argv[0];
90 (*argv_p)[1] = concat ("-mmacosx-version-min=",
91 macosx_deployment_target, NULL);
92 memcpy (*argv_p + 2, argv + 1, (argc - 1) * sizeof (char *));
97 /* Determine the version of the running OS. If we can't, warn user,
99 if (sysctl (osversion_name, ARRAY_SIZE (osversion_name), osversion,
100 &osversion_len, NULL, 0) == -1)
102 warning (0, "sysctl for kern.osversion failed: %m");
106 /* Try to parse the first two parts of the OS version number. Warn
107 user and return if it doesn't make sense. */
108 if (! ISDIGIT (osversion[0]))
110 major_vers = osversion[0] - '0';
111 version_p = osversion + 1;
112 if (ISDIGIT (*version_p))
113 major_vers = major_vers * 10 + (*version_p++ - '0');
114 if (major_vers > 4 + 9)
116 if (*version_p++ != '.')
118 version_pend = strchr(version_p, '.');
121 if (! ISDIGIT (*version_p))
123 strncpy(minor_vers, version_p, version_pend - version_p);
124 minor_vers[version_pend - version_p] = '\0';
126 /* The major kernel version number is 4 plus the second OS version
128 if (major_vers - 4 <= 4)
129 /* On 10.4 and earlier, the old linker is used which does not
130 support three-component system versions. */
131 sprintf (new_flag, "-mmacosx-version-min=10.%d", major_vers - 4);
133 sprintf (new_flag, "-mmacosx-version-min=10.%d.%s", major_vers - 4,
136 /* Add the new flag. */
138 *argv_p = XNEWVEC (char *, *argc_p);
139 (*argv_p)[0] = argv[0];
140 (*argv_p)[1] = new_flag;
141 memcpy (*argv_p + 2, argv + 1, (argc - 1) * sizeof (char *));
145 warning (0, "couldn't understand kern.osversion %q.*s",
146 (int) osversion_len, osversion);
150 #endif /* CROSS_DIRECTORY_STRUCTURE */