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 atomicity.h,
23 # defaults to cpu_include_dir
24 # CPULIMITSH location of cpu_limits.h,
25 # defaults to cpu_include_dir
27 # os_include_dir OS-specific directory, defaults to os/generic.
29 # c_model the model to use for "C" headers, defaults to c_std.
31 # c_compatibility if "C" compatibility headers are necessary,
34 # abi_baseline_triplet directory name for ABI compat testing,
35 # defaults to target (as per config.guess)
37 # It possibly modifies the following variables:
39 # OPT_LDFLAGS extra flags to pass when linking the library, of
41 # (defaults to empty in acinclude.m4)
44 # If the defaults will not work for your platform, you need only change the
45 # variables that won't work, i.e., you do not need to explicitly set a
46 # working variable to its default. Most targets only need to change the two
47 # *_include_dir variables.
51 # Try to guess a default cpu_include_dir based on the name of the CPU. We
52 # cannot do this for os_include_dir; there are too many portable operating
53 # systems out there. :-)
54 if test -d ${glibcpp_srcdir}/config/cpu/${target_cpu}; then
55 cpu_include_dir="cpu/${target_cpu}"
57 cpu_include_dir="cpu/generic"
60 abi_baseline_triplet=${target}
66 # TARGET-SPECIFIC OVERRIDES
67 # Set any CPU-dependent bits.
68 # Here we override defaults and catch more general cases due to naming
69 # conventions (e.g., chip_name* to catch all variants).
70 # THIS TABLE IS SORTED. KEEP IT THAT WAY.
71 case "${target_cpu}" in
73 cpu_include_dir="cpu/alpha"
75 arm* | strongarm* | xscale* )
76 cpu_include_dir="cpu/arm"
78 i486 | i586 | i686 | i786)
79 # add athlons here maybe
80 cpu_include_dir="cpu/i486"
84 cpu_include_dir="cpu/m68k"
87 # MIPS chips are unreliable as to sc/ll support. By default
88 # don't use atomic instructions and override for the OS.
89 cpu_include_dir="cpu/generic"
92 ATOMICITYH="cpu/generic"
95 cpu_include_dir="cpu/powerpc"
98 cpu_include_dir="cpu/s390"
100 sparc64 | ultrasparc)
101 cpu_include_dir="cpu/sparc/sparc64"
104 cpu_include_dir="cpu/sparc/sparc32"
107 cpu_include_dir="cpu/x86-64"
112 # Now look for the two files usually tied to a CPU model, and make default
113 # choices for those if they haven't been explicitly set already.
114 _cpu_incdir_fullpath=${glibcpp_srcdir}/config/${cpu_include_dir}
115 if test x${ATOMICITYH+set} != xset; then
116 if test -f ${_cpu_incdir_fullpath}/atomicity.h; then
117 ATOMICITYH=$cpu_include_dir
119 ATOMICITYH="cpu/generic"
122 if test x${CPULIMITSH+set} != xset; then
123 if test -f ${_cpu_incdir_fullpath}/cpu_limits.h; then
124 CPULIMITSH=$cpu_include_dir
126 CPULIMITSH="cpu/generic"
129 unset _cpu_incdir_fullpath
132 # Set any OS-dependent bits.
133 # Set the os_include_dir.
134 # Set c_model, c_compatibility here.
135 # If atomic ops and/or numeric limits are OS-specific rather than
136 # CPU-specifc, set those here too.
137 # THIS TABLE IS SORTED. KEEP IT THAT WAY.
138 case "${target_os}" in
139 aix4.[3456789]* | aix[56789]*)
140 # We set os_include_dir to os/aix only on AIX 4.3 and newer, but
141 # os/aix/atomicity.h works on earlier versions of AIX 4.*, so we
142 # explicitly duplicate the directory for 4.[<3].
143 os_include_dir="os/aix"
151 ATOMICITYH="cpu/generic"
154 os_include_dir="os/bsd/freebsd"
157 os_include_dir="os/newlib"
159 *djgpp*) # leading * picks up "msdosdjgpp"
160 os_include_dir="os/djgpp"
163 os_include_dir="os/gnu-linux"
166 os_include_dir="os/hpux"
169 irix[1-6] | irix[1-5].* | irix6.[0-4]*)
170 # This is known to work on at least IRIX 5.2 and 6.3.
171 os_include_dir="os/irix/irix5.2"
172 ATOMICITYH=$os_include_dir
175 os_include_dir="os/irix/irix6.5"
176 ATOMICITYH=$os_include_dir
179 os_include_dir="os/mingw32"
182 os_include_dir="os/bsd/netbsd"
185 os_include_dir="os/solaris/solaris2.5"
188 os_include_dir="os/solaris/solaris2.6"
191 os_include_dir="os/solaris/solaris2.7"
194 os_include_dir="os/windiss"
197 os_include_dir="os/qnx/qnx6.1"
201 os_include_dir="os/generic"
206 # Set any OS-dependent and CPU-dependent bits.
207 # THIS TABLE IS SORTED. KEEP IT THAT WAY.
210 CPULIMITSH="os/osf/osf5.0"
213 ATOMICITYH="cpu/mips"