3 # This shell script handles all host based configuration for libstdc++.
4 # It sets various shell variables based on the the host 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 # host The configuration host (full CPU-vendor-OS triplet)
13 # host_cpu The configuration host CPU
14 # host_os The configuration host OS
17 # It sets the following shell variables:
19 # cpu_include_dir CPU-specific directory, defaults to cpu/generic
20 # if cpu/host_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 "C" header model, 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 host_cpu-host_os (as per config.guess)
33 # fpos_include_dir directory for definition of fpos template
35 # ATOMICITYH location of atomicity.h,
36 # defaults to cpu_include_dir
38 # It possibly modifies the following variables:
40 # OPT_LDFLAGS extra flags to pass when linking the library, of
42 # (defaults to empty in acinclude.m4)
44 # port_specific_symbol_file
45 # whitespace-seperated list of files containing
46 # additional symbols to export from the shared
47 # library, when symbol versioning is in use
50 # If the defaults will not work for your platform, you need only change the
51 # variables that won't work, i.e., you do not need to explicitly set a
52 # working variable to its default. Most hosts only need to change the two
53 # *_include_dir variables.
57 # Try to guess a default cpu_include_dir based on the name of the CPU. We
58 # cannot do this for os_include_dir; there are too many portable operating
59 # systems out there. :-)
62 fpos_include_dir="os/generic"
64 # HOST-SPECIFIC OVERRIDES
65 # Set any CPU-dependent bits.
66 # Here we override defaults and catch more general cases due to naming
67 # conventions (e.g., chip_name* to catch all variants).
69 # THIS TABLE IS SORTED. KEEP IT THAT WAY.
81 # NB: cpu/mips/atomicity.h needs MIPS II or above.
82 # Of course, there is no sane way to test for this, no ABI macro,
83 # and no consistent host_cpu name differentiation. Therefore, only
84 # use it where it is known to be safe, ie it runs linux (see below).
100 if test -d ${glibcxx_srcdir}/config/cpu/${host_cpu}; then
108 # Now look for the file(s) usually tied to a CPU model, and make
109 # default choices for those if they haven't been explicitly set
111 cpu_include_dir="cpu/${try_cpu}"
112 ATOMICITYH=$cpu_include_dir
113 abi_baseline_pair=${try_cpu}-${host_os}
116 # Set any OS-dependent bits.
117 # Set the os_include_dir.
118 # Set c_model, c_compatibility here.
119 # If atomic ops and/or numeric limits are OS-specific rather than
120 # CPU-specifc, set those here too.
121 # THIS TABLE IS SORTED. KEEP IT THAT WAY.
123 aix4.[3456789]* | aix[56789]*)
124 # We set os_include_dir to os/aix only on AIX 4.3 and newer, but
125 # os/aix/atomicity.h works on earlier versions of AIX 4.*, so we
126 # explicitly duplicate the directory for 4.[<3].
127 os_include_dir="os/aix"
135 ATOMICITYH="cpu/generic"
138 # Plain BSD attempts to share FreeBSD files.
139 os_include_dir="os/bsd/freebsd"
142 os_include_dir="os/newlib"
144 *djgpp*) # leading * picks up "msdosdjgpp"
145 os_include_dir="os/djgpp"
148 os_include_dir="os/bsd/freebsd"
151 os_include_dir="os/gnu-linux"
152 fpos_include_dir=$os_include_dir
155 os_include_dir="os/hpux"
157 irix[1-6] | irix[1-5].* | irix6.[0-4]*)
158 # This is known to work on at least IRIX 5.2 and 6.3.
159 os_include_dir="os/irix/irix5.2"
160 ATOMICITYH=$os_include_dir
163 os_include_dir="os/irix/irix6.5"
164 ATOMICITYH=$os_include_dir
167 os_include_dir="os/mingw32"
170 os_include_dir="os/bsd/netbsd"
173 os_include_dir="os/solaris/solaris2.5"
176 os_include_dir="os/solaris/solaris2.6"
179 os_include_dir="os/solaris/solaris2.7"
182 os_include_dir="os/windiss"
185 os_include_dir="os/qnx/qnx6.1"
189 os_include_dir="os/generic"
194 # Set any OS-dependent and CPU-dependent bits.
195 # THIS TABLE IS SORTED. KEEP IT THAT WAY.
198 ATOMICITYH="cpu/mips"
201 abi_baseline_pair="x86_64-linux-gnu"
204 abi_baseline_pair="alpha-freebsd5"
207 abi_baseline_pair="i386-freebsd4"
210 abi_baseline_pair="i386-freebsd5"
213 abi_baseline_pair="sparc-freebsd5"