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 # It possibly modifies the following variables:
36 # OPT_LDFLAGS extra flags to pass when linking the library, of
38 # (defaults to empty in acinclude.m4)
41 # If the defaults will not work for your platform, you need only change the
42 # variables that won't work, i.e., you do not need to explicitly set a
43 # working variable to its default. Most targets only need to change the two
44 # *_include_dir variables.
48 # Try to guess a default cpu_include_dir based on the name of the CPU. We
49 # cannot do this for os_include_dir; there are too many portable operating
50 # systems out there. :-)
51 if test -d ${glibcpp_srcdir}/config/cpu/${target_cpu}; then
52 cpu_include_dir="cpu/${target_cpu}"
54 cpu_include_dir="cpu/generic"
61 # TARGET-SPECIFIC OVERRIDES
62 # Set any CPU-dependent bits.
63 # Here we override defaults and catch more general cases due to naming
64 # conventions (e.g., chip_name* to catch all variants).
65 # THIS TABLE IS SORTED. KEEP IT THAT WAY.
66 case "${target_cpu}" in
68 cpu_include_dir="cpu/alpha"
71 cpu_include_dir="cpu/arm"
73 i486 | i586 | i686 | i786)
74 cpu_include_dir="cpu/i486"
78 cpu_include_dir="cpu/m68k"
81 # MIPS chips are unreliable as to sc/ll support. By default
82 # don't use atomic instructions and override for the OS.
83 cpu_include_dir="cpu/generic"
86 ATOMICITYH="cpu/generic"
89 cpu_include_dir="cpu/powerpc"
92 cpu_include_dir="cpu/s390"
95 cpu_include_dir="cpu/sparc/sparc64"
98 cpu_include_dir="cpu/sparc/sparc32"
101 cpu_include_dir="cpu/x86-64"
106 # Now look for the two files usually tied to a CPU model, and make default
107 # choices for those if they haven't been explicitly set already.
108 _cpu_incdir_fullpath=${glibcpp_srcdir}/config/${cpu_include_dir}
109 if test x${ATOMICITYH+set} != xset; then
110 if test -f ${_cpu_incdir_fullpath}/atomicity.h; then
111 ATOMICITYH=$cpu_include_dir
113 ATOMICITYH="cpu/generic"
116 if test x${CPULIMITSH+set} != xset; then
117 if test -f ${_cpu_incdir_fullpath}/cpu_limits.h; then
118 CPULIMITSH=$cpu_include_dir
120 CPULIMITSH="cpu/generic"
123 unset _cpu_incdir_fullpath
126 # Set any OS-dependent bits.
127 # Set the os_include_dir.
128 # Set c_model, c_compatibility here.
129 # If atomic ops and/or numeric limits are OS-specific rather than
130 # CPU-specifc, set those here too.
131 # THIS TABLE IS SORTED. KEEP IT THAT WAY.
132 case "${target_os}" in
133 aix4.[3456789]* | aix[56789]*)
134 # We set os_include_dir to os/aix only on AIX 4.3 and newer, but
135 # os/aix/atomicity.h works on earlier versions of AIX 4.*, so we
136 # explicitly duplicate the directory for 4.[<3].
137 os_include_dir="os/aix"
145 ATOMICITYH="cpu/generic"
148 os_include_dir="os/bsd/freebsd"
151 os_include_dir="os/newlib"
153 *djgpp*) # leading * picks up "msdosdjgpp"
154 os_include_dir="os/djgpp"
157 os_include_dir="os/gnu-linux"
160 os_include_dir="os/hpux"
163 irix[1-6] | irix[1-5].* | irix6.[0-4]*)
164 # This is known to work on at least IRIX 5.2 and 6.3.
165 os_include_dir="os/irix/irix5.2"
166 ATOMICITYH=$os_include_dir
169 os_include_dir="os/irix/irix6.5"
170 ATOMICITYH=$os_include_dir
173 os_include_dir="os/mingw32"
176 os_include_dir="os/bsd/netbsd"
179 os_include_dir="os/solaris/solaris2.5"
182 os_include_dir="os/solaris/solaris2.6"
185 os_include_dir="os/solaris/solaris2.7"
188 os_include_dir="os/windiss"
191 os_include_dir="os/qnx/qnx6.1"
195 os_include_dir="os/generic"
200 # Set any OS-dependent and CPU-dependent bits.
201 # THIS TABLE IS SORTED. KEEP IT THAT WAY.
204 CPULIMITSH="os/osf/osf5.0"
207 ATOMICITYH="cpu/mips"