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).
62 # THIS TABLE IS SORTED. KEEP IT THAT WAY.
67 athlon* | i586 | i686 | i786 | x86_64)
74 # NB: cpu/mips/atomicity.h needs MIPS II or above.
75 # Of course, there is no sane way to test for this, no ABI macro,
76 # and no consistent host_cpu name differentiation. Therefore, only
77 # use it where it is known to be safe, ie it runs linux (see below).
93 if test -d ${glibcpp_srcdir}/config/cpu/${host_cpu}; then
101 # Now look for the file(s) usually tied to a CPU model, and make
102 # default choices for those if they haven't been explicitly set
104 cpu_include_dir="cpu/${try_cpu}"
105 ATOMICITYH=$cpu_include_dir
106 abi_baseline_pair=${try_cpu}-${host_os}
109 # Set any OS-dependent bits.
110 # Set the os_include_dir.
111 # Set c_model, c_compatibility here.
112 # If atomic ops and/or numeric limits are OS-specific rather than
113 # CPU-specifc, set those here too.
114 # THIS TABLE IS SORTED. KEEP IT THAT WAY.
116 aix4.[3456789]* | aix[56789]*)
117 # We set os_include_dir to os/aix only on AIX 4.3 and newer, but
118 # os/aix/atomicity.h works on earlier versions of AIX 4.*, so we
119 # explicitly duplicate the directory for 4.[<3].
120 os_include_dir="os/aix"
128 ATOMICITYH="cpu/generic"
131 # Plain BSD attempts to share FreeBSD files.
132 os_include_dir="os/bsd/freebsd"
135 os_include_dir="os/newlib"
137 *djgpp*) # leading * picks up "msdosdjgpp"
138 os_include_dir="os/djgpp"
141 os_include_dir="os/bsd/freebsd"
144 os_include_dir="os/gnu-linux"
147 os_include_dir="os/hpux"
149 irix[1-6] | irix[1-5].* | irix6.[0-4]*)
150 # This is known to work on at least IRIX 5.2 and 6.3.
151 os_include_dir="os/irix/irix5.2"
152 ATOMICITYH=$os_include_dir
155 os_include_dir="os/irix/irix6.5"
156 ATOMICITYH=$os_include_dir
159 os_include_dir="os/mingw32"
162 os_include_dir="os/bsd/netbsd"
165 os_include_dir="os/solaris/solaris2.5"
168 os_include_dir="os/solaris/solaris2.6"
171 os_include_dir="os/solaris/solaris2.7"
174 os_include_dir="os/windiss"
177 os_include_dir="os/qnx/qnx6.1"
181 os_include_dir="os/generic"
186 # Set any OS-dependent and CPU-dependent bits.
187 # THIS TABLE IS SORTED. KEEP IT THAT WAY.
190 ATOMICITYH="cpu/mips"
193 abi_baseline_pair="x86_64-linux-gnu"
196 abi_baseline_pair="alpha-freebsd5"
199 abi_baseline_pair="i386-freebsd4"
202 abi_baseline_pair="i386-freebsd5"
205 abi_baseline_pair="sparc-freebsd5"