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.
8 # You should read docs/html/17_intro/porting.* to make sense of this file.
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
17 # It sets the following shell variables:
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
27 # os_include_dir OS-specific directory, defaults to os/generic.
30 # It possibly modifies the following variables:
32 # OPT_LDFLAGS extra flags to pass when linking the library, of
34 # (defaults to empty in acinclude.m4)
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.
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/${target_cpu}"
49 cpu_include_dir="cpu/generic"
53 # Here we override defaults and catch more general cases due to naming
54 # conventions (e.g., chip_name* to catch all variants). Also set any
55 # CPU-dependent compiler flags.
56 # THIS TABLE IS SORTED. KEEP IT THAT WAY.
57 case "${target_cpu}" in
59 cpu_include_dir="cpu/alpha"
62 cpu_include_dir="cpu/arm"
64 i486 | i586 | i686 | i786)
65 cpu_include_dir="cpu/i486"
69 cpu_include_dir="cpu/m68k"
72 ATOMICITYH="cpu/generic"
75 cpu_include_dir="cpu/powerpc"
78 cpu_include_dir="cpu/s390"
81 cpu_include_dir="cpu/sparc/sparc64"
84 cpu_include_dir="cpu/sparc/sparc32"
87 cpu_include_dir="cpu/x86-64"
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
99 ATOMICITYH="cpu/generic"
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
106 CPULIMITSH="cpu/generic"
109 unset _cpu_incdir_fullpath
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
115 # THIS TABLE IS SORTED. KEEP IT THAT WAY.
116 case "${target_os}" in
117 aix4.[3456789]* | aix[56789]*)
118 # We set os_include_dir to os/aix only on AIX 4.3 and newer, but
119 # os/aix/bits/atomicity.h works on earlier versions of AIX 4.*, so we
120 # explicitly duplicate the directory for 4.[<3].
121 os_include_dir="os/aix"
129 ATOMICITYH="cpu/generic"
132 os_include_dir="os/bsd/freebsd"
135 os_include_dir="os/newlib"
137 *djgpp*) # leading * picks up "msdosdjgpp"
138 os_include_dir="os/djgpp"
141 os_include_dir="os/gnu-linux"
144 os_include_dir="os/hpux"
147 irix[1-6] | irix[1-5].* | irix6.[0-4])
148 # This is known to work on at least IRIX 5.2 and 6.3.
149 os_include_dir="os/irix/irix5.2"
150 ATOMICITYH=$os_include_dir
153 os_include_dir="os/irix/irix6.5"
154 ATOMICITYH=$os_include_dir
157 os_include_dir="os/mingw32"
160 os_include_dir="os/bsd/netbsd"
163 os_include_dir="os/solaris/solaris2.5"
166 os_include_dir="os/solaris/solaris2.6"
169 os_include_dir="os/solaris/solaris2.7"
172 os_include_dir="os/windiss"
175 os_include_dir="os/qnx/qnx6.1"
178 os_include_dir="os/generic"
183 # Set any flags dependent on the full target triplet.
184 # THIS TABLE IS SORTED. KEEP IT THAT WAY.
187 CPULIMITSH="os/osf/osf5.0"