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 ATOMICITYH.
23 # os_include_dir OS-specific directory, defaults to os/generic.
25 # c_model the model to use for "C" headers, defaults to c_std.
27 # c_compatibility if "C" compatibility headers are necessary,
30 # abi_baseline_pair directory name for ABI compat testing,
31 # defaults to target (as per config.guess)
33 # ATOMICITYH location of atomicity.h,
34 # defaults to cpu_include_dir
36 # It possibly modifies the following variables:
38 # OPT_LDFLAGS extra flags to pass when linking the library, of
40 # (defaults to empty in acinclude.m4)
43 # If the defaults will not work for your platform, you need only change the
44 # variables that won't work, i.e., you do not need to explicitly set a
45 # working variable to its default. Most targets only need to change the two
46 # *_include_dir variables.
50 # Try to guess a default cpu_include_dir based on the name of the CPU. We
51 # cannot do this for os_include_dir; there are too many portable operating
52 # systems out there. :-)
57 # TARGET-SPECIFIC OVERRIDES
58 # Set any CPU-dependent bits.
59 # Here we override defaults and catch more general cases due to naming
60 # conventions (e.g., chip_name* to catch all variants).
61 # THIS TABLE IS SORTED. KEEP IT THAT WAY.
63 case "${target_cpu}" in
67 athlon* | i586 | i686 | i786 | x86_64)
86 if test -d ${glibcpp_srcdir}/config/cpu/${target_cpu}; then
95 # Now look for the file(s) usually tied to a CPU model, and make
96 # default choices for those if they haven't been explicitly set
98 cpu_include_dir="cpu/${try_cpu}"
99 ATOMICITYH=$cpu_include_dir
100 abi_baseline_pair=${try_cpu}-${host_os}
102 # Set any OS-dependent bits.
103 # Set the os_include_dir.
104 # Set c_model, c_compatibility here.
105 # If atomic ops and/or numeric limits are OS-specific rather than
106 # CPU-specifc, set those here too.
107 # THIS TABLE IS SORTED. KEEP IT THAT WAY.
108 case "${target_os}" in
109 aix4.[3456789]* | aix[56789]*)
110 # We set os_include_dir to os/aix only on AIX 4.3 and newer, but
111 # os/aix/atomicity.h works on earlier versions of AIX 4.*, so we
112 # explicitly duplicate the directory for 4.[<3].
113 os_include_dir="os/aix"
121 ATOMICITYH="cpu/generic"
124 # Plain BSD attempts to share FreeBSD files.
125 os_include_dir="os/bsd/freebsd"
128 os_include_dir="os/newlib"
130 *djgpp*) # leading * picks up "msdosdjgpp"
131 os_include_dir="os/djgpp"
134 os_include_dir="os/bsd/freebsd"
137 os_include_dir="os/gnu-linux"
140 os_include_dir="os/hpux"
142 irix[1-6] | irix[1-5].* | irix6.[0-4]*)
143 # This is known to work on at least IRIX 5.2 and 6.3.
144 os_include_dir="os/irix/irix5.2"
145 ATOMICITYH=$os_include_dir
148 os_include_dir="os/irix/irix6.5"
149 ATOMICITYH=$os_include_dir
152 os_include_dir="os/mingw32"
155 os_include_dir="os/bsd/netbsd"
157 solaris2.5 | solaris2.5.[0-9])
158 os_include_dir="os/solaris/solaris2.5"
161 os_include_dir="os/solaris/solaris2.6"
163 solaris2.[789] | solaris2.1[0-9])
164 os_include_dir="os/solaris/solaris2.7"
167 os_include_dir="os/windiss"
170 os_include_dir="os/qnx/qnx6.1"
174 os_include_dir="os/generic"
179 # Set any OS-dependent and CPU-dependent bits.
180 # THIS TABLE IS SORTED. KEEP IT THAT WAY.
183 ATOMICITYH="cpu/mips"
186 abi_baseline_pair="x86_64-linux-gnu"
189 abi_baseline_pair="alpha-freebsd5"
192 abi_baseline_pair="i386-freebsd4"
195 abi_baseline_pair="i386-freebsd5"
198 abi_baseline_pair="sparc-freebsd5"