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 # 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 hosts 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 # HOST-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 if test -d ${glibcpp_srcdir}/config/cpu/${host_cpu}; then
65 # THIS TABLE IS SORTED. KEEP IT THAT WAY.
70 athlon* | i586 | i686 | i786 | x86_64)
77 # NB: cpu/mips/atomicity.h needs MIPS II or above.
78 # Of course, there is no sane way to test for this, no ABI macro,
79 # and no consistent host_cpu name differentiation. Therefore, only
80 # use it where it is known to be safe, ie it runs linux (see below).
100 # Now look for the file(s) usually tied to a CPU model, and make
101 # default choices for those if they haven't been explicitly set
103 cpu_include_dir="cpu/${try_cpu}"
104 ATOMICITYH=$cpu_include_dir
105 abi_baseline_pair=${try_cpu}-${host_os}
108 # Set any OS-dependent bits.
109 # Set the os_include_dir.
110 # Set c_model, c_compatibility here.
111 # If atomic ops and/or numeric limits are OS-specific rather than
112 # CPU-specifc, set those here too.
113 # THIS TABLE IS SORTED. KEEP IT THAT WAY.
115 aix4.[3456789]* | aix[56789]*)
116 # We set os_include_dir to os/aix only on AIX 4.3 and newer, but
117 # os/aix/atomicity.h works on earlier versions of AIX 4.*, so we
118 # explicitly duplicate the directory for 4.[<3].
119 os_include_dir="os/aix"
127 ATOMICITYH="cpu/generic"
130 # Plain BSD attempts to share FreeBSD files.
131 os_include_dir="os/bsd/freebsd"
134 os_include_dir="os/newlib"
136 *djgpp*) # leading * picks up "msdosdjgpp"
137 os_include_dir="os/djgpp"
140 os_include_dir="os/bsd/freebsd"
143 os_include_dir="os/gnu-linux"
146 os_include_dir="os/hpux"
148 irix[1-6] | irix[1-5].* | irix6.[0-4]*)
149 # This is known to work on at least IRIX 5.2 and 6.3.
150 os_include_dir="os/irix/irix5.2"
151 ATOMICITYH=$os_include_dir
154 os_include_dir="os/irix/irix6.5"
155 ATOMICITYH=$os_include_dir
158 os_include_dir="os/mingw32"
161 os_include_dir="os/bsd/netbsd"
164 os_include_dir="os/solaris/solaris2.5"
167 os_include_dir="os/solaris/solaris2.6"
170 os_include_dir="os/solaris/solaris2.7"
173 os_include_dir="os/windiss"
176 os_include_dir="os/qnx/qnx6.1"
180 os_include_dir="os/generic"
185 # Set any OS-dependent and CPU-dependent bits.
186 # THIS TABLE IS SORTED. KEEP IT THAT WAY.
189 ATOMICITYH="cpu/mips"
192 abi_baseline_pair="x86_64-linux-gnu"
195 abi_baseline_pair="i386-freebsd4"