OSDN Git Service

2002-06-18 Phil Edwards <pme@gcc.gnu.org>
[pf3gnuchains/gcc-fork.git] / libstdc++-v3 / configure.target
1 # configure.target
2 #
3 # This shell script handles all target based configuration for libstdc++.
4 # It sets various shell variables based on the the target and the
5 # configuration options.  You can modify this shell script without needing
6 # to rerun autoconf/aclocal/etc.  This file is "sourced" not executed.
7 #
8 # You should read docs/html/17_intro/porting.* to make sense of this file.
9 #
10 #
11 # It uses the following shell variables as set by config.guess:
12 #   target                The configuration target (full CPU-vendor-OS triplet)
13 #   target_cpu            The configuration target CPU
14 #   target_os             The configuration target OS
15 #
16 #
17 # It sets the following shell variables:
18 #
19 #   cpu_include_dir        CPU-specific directory, defaults to cpu/generic
20 #                              if cpu/target_cpu doesn't exist.  This is
21 #                              used to set the next two:
22 #   ATOMICITYH             location of bits/atomicity.h,
23 #                              defaults to cpu_include_dir
24 #   CPULIMITSH             location of bits/cpu_limits.h,
25 #                              defaults to cpu_include_dir
26 #
27 #   os_include_dir         OS-specific directory, defaults to os/generic.
28 #
29 #
30 # It possibly modifies the following variables:
31 #
32 #   OPT_LDFLAGS            extra flags to pass when linking the library, of
33 #                              the form '-Wl,blah'
34 #                              (defaults to empty in acinclude.m4)
35 #
36 #
37 # If the defaults will not work for your platform, you need only change the
38 # variables that won't work, i.e., you do not need to explicitly set a
39 # working variable to its default.  Most targets only need to change the two
40 # *_include_dir variables.
41
42
43 # Try to guess a default cpu_include_dir based on the name of the CPU.  We
44 # cannot do this for os_include_dir; there are too many portable operating
45 # systems out there.  :-)
46 if test -d ${glibcpp_srcdir}/config/cpu/${target_cpu}; then
47     cpu_include_dir="cpu/${target_cpu}"
48 else
49     cpu_include_dir="cpu/generic"
50 fi
51
52
53 # Here we override defaults and catch more general cases due to naming
54 # conventions (e.g., chip_name* to catch all variants).  Also set any
55 # CPU-dependent compiler flags.
56 # THIS TABLE IS SORTED.  KEEP IT THAT WAY.
57 case "${target_cpu}" in
58   alpha*)
59     cpu_include_dir="cpu/alpha"
60     ;;
61   arm*)
62     cpu_include_dir="cpu/arm"
63     ;;
64   i486 | i586 | i686 | i786)
65     cpu_include_dir="cpu/i486"
66     CPULIMITSH="cpu/i386"
67     ;;
68   m68k | m680[246]0)
69     cpu_include_dir="cpu/m68k"
70     ;;
71   mmix)
72     ATOMICITYH="cpu/generic"
73     ;;
74   powerpc | rs6000)
75     cpu_include_dir="cpu/powerpc"
76     ;;
77   s390 | s390x)
78     cpu_include_dir="cpu/s390"
79     ;;
80   sparc64 | ultrasparc)
81     cpu_include_dir="cpu/sparc/sparc64"
82     ;;
83   sparc*)
84     cpu_include_dir="cpu/sparc/sparc32"
85     ;;
86   x86_64*)
87     cpu_include_dir="cpu/x86-64"
88     ;;
89 esac
90
91
92 # Now look for the two files usually tied to a CPU model, and make default
93 # choices for those if they haven't been explicitly set already.
94 _cpu_incdir_fullpath=${glibcpp_srcdir}/config/${cpu_include_dir}
95 if test x${ATOMICITYH+set} != xset; then
96   if test -f ${_cpu_incdir_fullpath}/bits/atomicity.h; then
97     ATOMICITYH=$cpu_include_dir
98   else
99     ATOMICITYH="cpu/generic"
100   fi
101 fi
102 if test x${CPULIMITSH+set} != xset; then
103   if test -f ${_cpu_incdir_fullpath}/bits/cpu_limits.h; then
104     CPULIMITSH=$cpu_include_dir
105   else
106     CPULIMITSH="cpu/generic"
107   fi
108 fi
109 unset _cpu_incdir_fullpath
110
111
112 # Set the os_include_dir.  If atomic ops and/or numeric limits are OS-specific
113 # rather than CPU-specifc, set those here too.  Also set any OS-dependent
114 # compiler flags.
115 # THIS TABLE IS SORTED.  KEEP IT THAT WAY.
116 case "${target_os}" in
117   aix4.[3456789]* | aix[56789]*)
118     # We set os_include_dir to os/aix only on AIX 4.3 and newer, but
119     # os/aix/bits/atomicity.h works on earlier versions of AIX 4.*, so we
120     # explicitly duplicate the directory for 4.[<3].
121     os_include_dir="os/aix"
122     ATOMICITYH="os/aix"
123     OPT_LDFLAGS="-Wl,-G"
124     ;;
125   aix4.*)
126     ATOMICITYH="os/aix"
127     ;;
128   aix*)
129     ATOMICITYH="cpu/generic"
130     ;;
131   bsd* | freebsd* )
132     os_include_dir="os/bsd/freebsd"
133     ;;
134   cygwin*)
135     os_include_dir="os/newlib"
136     ;;
137   *djgpp*)      # leading * picks up "msdosdjgpp"
138     os_include_dir="os/djgpp"
139     ;;
140   gnu* | linux*)
141     os_include_dir="os/gnu-linux"
142     ;;
143   hpux*)
144     os_include_dir="os/hpux"
145     CPULIMITSH="os/hpux"
146     ;;
147   irix[1-6] | irix[1-5].* | irix6.[0-4])
148     # This is known to work on at least IRIX 5.2 and 6.3.
149     os_include_dir="os/irix/irix5.2"
150     ATOMICITYH=$os_include_dir
151     ;;
152   irix6.5)
153     os_include_dir="os/irix/irix6.5"
154     ATOMICITYH=$os_include_dir
155     ;;
156   mingw32*)
157     os_include_dir="os/mingw32"
158     ;;
159   netbsd*)
160     os_include_dir="os/bsd/netbsd"
161     ;;
162   solaris2.5*)
163     os_include_dir="os/solaris/solaris2.5"
164     ;;
165   solaris2.6*)
166     os_include_dir="os/solaris/solaris2.6"
167     ;;
168   solaris2.[78]*)
169     os_include_dir="os/solaris/solaris2.7"
170     ;;
171   windiss*)
172     os_include_dir="os/windiss"
173     ;;
174   qnx6.[12]*)
175     os_include_dir="os/qnx/qnx6.1"
176     ;;
177   *)
178     os_include_dir="os/generic"
179     ;;
180 esac
181
182
183 # Set any flags dependent on the full target triplet.
184 # THIS TABLE IS SORTED.  KEEP IT THAT WAY.
185 case "${target}" in
186   alpha*-*-*osf5*)
187     CPULIMITSH="os/osf/osf5.0"
188     ;;
189 esac
190