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 2, 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 COPYING. If not, write to
19 the Free Software Foundation, 51 Franklin Street, Fifth Floor,
20 Boston, MA 02110-1301, USA. */
22 #ifndef CROSS_DIRECTORY_STRUCTURE
25 #include "coretypes.h"
28 #include <sys/sysctl.h>
31 #ifndef SWITCH_TAKES_ARG
32 #define SWITCH_TAKES_ARG(CHAR) DEFAULT_SWITCH_TAKES_ARG(CHAR)
35 #ifndef WORD_SWITCH_TAKES_ARG
36 #define WORD_SWITCH_TAKES_ARG(STR) DEFAULT_WORD_SWITCH_TAKES_ARG (STR)
39 /* When running on a Darwin system and using that system's headers and
40 libraries, default the -mmacosx-version-min flag to be the version
41 of the system on which the compiler is running. */
44 darwin_default_min_version (int * argc_p, char *** argv_p)
46 const int argc = *argc_p;
47 char ** const argv = *argv_p;
50 size_t osversion_len = sizeof (osversion) - 1;
51 static int osversion_name[2] = { CTL_KERN, KERN_OSRELEASE };
56 static char new_flag[sizeof ("-mmacosx-version-min=10.0.0") + 6];
58 /* If the command-line is empty, just return. */
61 /* Don't do this if the user has specified -b or -V at the start
62 of the command-line. */
64 && (argv[1][1] == 'V' ||
65 ((argv[1][1] == 'b') && (NULL != strchr(argv[1] + 2,'-')))))
68 /* Don't do this if the user specified -mmacosx-version-min= or
69 -mno-macosx-version-min. */
70 for (i = 1; i < argc; i++)
71 if (argv[i][0] == '-')
73 const char * const p = argv[i];
74 if (strncmp (p, "-mno-macosx-version-min", 23) == 0
75 || strncmp (p, "-mmacosx-version-min", 20) == 0)
78 /* It doesn't count if it's an argument to a different switch. */
80 && ((SWITCH_TAKES_ARG (p[1]) > (p[2] != 0))
81 || WORD_SWITCH_TAKES_ARG (p + 1)))
85 /* Retrieve the deployment target from the environment and insert
88 const char * macosx_deployment_target;
89 macosx_deployment_target = getenv ("MACOSX_DEPLOYMENT_TARGET");
90 if (macosx_deployment_target
91 /* Apparently, an empty string for MACOSX_DEPLOYMENT_TARGET means
92 "use the default". Or, possibly "use 10.1". We choose
93 to ignore the environment variable, as if it was never set. */
94 && macosx_deployment_target[0])
97 *argv_p = xmalloc (sizeof (char *) * *argc_p);
98 (*argv_p)[0] = argv[0];
99 (*argv_p)[1] = concat ("-mmacosx-version-min=",
100 macosx_deployment_target, NULL);
101 memcpy (*argv_p + 2, argv + 1, (argc - 1) * sizeof (char *));
106 /* Determine the version of the running OS. If we can't, warn user,
108 if (sysctl (osversion_name, ARRAY_SIZE (osversion_name), osversion,
109 &osversion_len, NULL, 0) == -1)
111 fprintf (stderr, "sysctl for kern.osversion failed: %s\n",
116 /* Try to parse the first two parts of the OS version number. Warn
117 user and return if it doesn't make sense. */
118 if (! ISDIGIT (osversion[0]))
120 major_vers = osversion[0] - '0';
121 version_p = osversion + 1;
122 if (ISDIGIT (*version_p))
123 major_vers = major_vers * 10 + (*version_p++ - '0');
124 if (major_vers > 4 + 9)
126 if (*version_p++ != '.')
128 version_pend = strchr(version_p, '.');
131 if (! ISDIGIT (*version_p))
133 strncpy(minor_vers, version_p, version_pend - version_p);
134 minor_vers[version_pend - version_p] = '\0';
136 /* The major kernel version number is 4 plus the second OS version
138 if (major_vers - 4 <= 4)
139 /* On 10.4 and earlier, the old linker is used which does not
140 support three-component system versions. */
141 sprintf (new_flag, "-mmacosx-version-min=10.%d", major_vers - 4);
143 sprintf (new_flag, "-mmacosx-version-min=10.%d.%s", major_vers - 4,
146 /* Add the new flag. */
148 *argv_p = xmalloc (sizeof (char *) * *argc_p);
149 (*argv_p)[0] = argv[0];
150 (*argv_p)[1] = new_flag;
151 memcpy (*argv_p + 2, argv + 1, (argc - 1) * sizeof (char *));
155 fprintf (stderr, "couldn't understand kern.osversion `%.*s'\n",
156 (int) osversion_len, osversion);
160 #endif /* CROSS_DIRECTORY_STRUCTURE */