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 not used
21 # directly, but sets the default for others.
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 # abi_tweaks_dir location of cxxabi_tweaks.h,
34 # defaults to cpu_include_dir
36 # atomicity_dir location of atomicity.h,
37 # defaults to cpu_include_dir
39 # atomic_word_dir location of atomic_word.h
40 # defaults to generic.
42 # cpu_defines_dir location of cpu_defines.h
43 # defaults to generic.
45 # It possibly modifies the following variables:
47 # OPT_LDFLAGS extra flags to pass when linking the library, of
49 # (defaults to empty in acinclude.m4)
51 # port_specific_symbol_files
52 # whitespace-seperated list of files containing
53 # additional symbols to export from the shared
54 # library, when symbol versioning is in use
57 # If the defaults will not work for your platform, you need only change the
58 # variables that won't work, i.e., you do not need to explicitly set a
59 # working variable to its default. Most hosts only need to change the two
60 # *_include_dir variables.
64 # Try to guess a default cpu_include_dir based on the name of the CPU. We
65 # cannot do this for os_include_dir; there are too many portable operating
66 # systems out there. :-)
69 atomic_word_dir=cpu/generic
70 cpu_defines_dir=cpu/generic
72 # HOST-SPECIFIC OVERRIDES
73 # Set any CPU-dependent bits.
74 # Here we override defaults and catch more general cases due to naming
75 # conventions (e.g., chip_name* to catch all variants).
77 # THIS TABLE IS SORTED. KEEP IT THAT WAY.
82 arm* | xscale | ep9312)
92 # NB: cpu/mips/atomicity.h needs MIPS II or above.
93 # Of course, there is no sane way to test for this, no ABI macro,
94 # and no consistent host_cpu name differentiation. Therefore, only
95 # use it where it is known to be safe, ie it runs linux (see below).
111 if test -d ${glibcxx_srcdir}/config/cpu/${host_cpu}; then
119 # Set specific CPU overrides for atomic_word_dir. Most can just use generic.
120 # THIS TABLE IS SORTED. KEEP IT THAT WAY.
121 case "${host_cpu}" in
123 atomic_word_dir=cpu/cris
126 atomic_word_dir=cpu/sparc
130 # Set specific CPU overrides for cpu_defines_dir. Most can just use generic.
131 # THIS TABLE IS SORTED. KEEP IT THAT WAY.
132 case "${host_cpu}" in
134 cpu_defines_dir=cpu/powerpc
138 # Now look for the file(s) usually tied to a CPU model, and make
139 # default choices for those if they haven't been explicitly set
141 cpu_include_dir=cpu/${try_cpu}
142 abi_baseline_pair=${try_cpu}-${host_os}
145 if test -f ${glibcxx_srcdir}/config/${cpu_include_dir}/atomicity.h ; then
146 atomicity_dir=$cpu_include_dir
148 atomicity_dir="cpu/generic"
151 if test -f ${glibcxx_srcdir}/config/${cpu_include_dir}/cxxabi_tweaks.h ; then
152 abi_tweaks_dir=$cpu_include_dir
154 abi_tweaks_dir="cpu/generic"
157 # Set any OS-dependent bits.
158 # Set the os_include_dir.
159 # Set c_model, c_compatibility here.
160 # If atomic ops and/or numeric limits are OS-specific rather than
161 # CPU-specifc, set those here too.
162 # THIS TABLE IS SORTED. KEEP IT THAT WAY.
164 aix4.[3456789]* | aix[56789]*)
165 # We set os_include_dir to os/aix only on AIX 4.3 and newer, but
166 # os/aix/atomicity.h works on earlier versions of AIX 4.*, so we
167 # explicitly duplicate the directory for 4.[<3].
168 os_include_dir="os/aix"
169 atomicity_dir="os/aix"
170 atomic_word_dir="os/aix"
174 os_include_dir="os/generic"
175 atomicity_dir="os/aix"
176 atomic_word_dir="os/aix"
179 os_include_dir="os/generic"
180 atomicity_dir="cpu/generic"
183 # Plain BSD attempts to share FreeBSD files.
184 os_include_dir="os/bsd/freebsd"
187 os_include_dir="os/newlib"
189 darwin | darwin[1-7] | darwin[1-7].*)
190 # On Darwin, performance is improved if libstdc++ is single-module.
191 # Up to at least 10.3.7, -flat_namespace is required for proper
192 # treatment of coalesced symbols.
193 OPT_LDFLAGS="${OPT_LDFLAGS} -Wl,-single_module -Wl,-flat_namespace"
194 os_include_dir="os/bsd/darwin"
196 darwin[89] | darwin[89].* | darwin[1-9][0-9]* )
197 # On Darwin, performance is improved if libstdc++ is single-module,
198 # and on 8+ compatibility is better if not -flat_namespace.
199 OPT_LDFLAGS="${OPT_LDFLAGS} -Wl,-single_module"
200 os_include_dir="os/bsd/darwin"
202 *djgpp*) # leading * picks up "msdosdjgpp"
203 os_include_dir="os/djgpp"
206 os_include_dir="os/bsd/freebsd"
208 gnu* | linux* | kfreebsd*-gnu | knetbsd*-gnu)
209 os_include_dir="os/gnu-linux"
212 os_include_dir="os/hpux"
214 irix[1-6] | irix[1-5].* | irix6.[0-4]*)
215 # This is known to work on at least IRIX 5.2 and 6.3.
216 os_include_dir="os/irix/irix5.2"
217 atomicity_dir=os/irix
218 atomic_word_dir=os/irix
221 os_include_dir="os/irix/irix6.5"
222 atomicity_dir=os/irix
223 atomic_word_dir=os/irix
226 os_include_dir="os/mingw32"
229 os_include_dir="os/bsd/netbsd"
232 os_include_dir="os/qnx/qnx6.1"
236 # This too-vague configuration does not provide enough information
237 # to select a ctype include, and thus os_include_dir is a crap shoot.
238 echo "Please specify the full version of Solaris, ie. solaris2.9 " 1>&2
241 solaris2.5 | solaris2.5.[0-9])
242 os_include_dir="os/solaris/solaris2.5"
245 os_include_dir="os/solaris/solaris2.6"
247 solaris2.[789] | solaris2.1[0-9])
248 os_include_dir="os/solaris/solaris2.7"
251 os_include_dir="os/tpf"
254 os_include_dir="os/vxworks"
257 os_include_dir="os/windiss"
260 os_include_dir="os/generic"
265 # Set any OS-dependent and CPU-dependent bits.
266 # THIS TABLE IS SORTED. KEEP IT THAT WAY.
269 abi_baseline_pair="alpha-freebsd5"
272 abi_baseline_pair="arm-linux-gnu"
275 abi_baseline_pair="i386-freebsd4"
278 abi_baseline_pair="i386-freebsd5"
281 atomicity_dir="cpu/mips"
282 abi_baseline_pair="mips-linux-gnu"
283 cpu_include_dir="cpu/mips"
286 port_specific_symbol_files="\$(srcdir)/../config/os/bsd/darwin/ppc-extra.ver"
289 abi_baseline_pair="powerpc64-linux-gnu"
292 abi_baseline_pair="s390-linux-gnu"
295 abi_baseline_pair="s390x-linux-gnu"
298 abi_baseline_pair="sparc-freebsd5"
301 abi_baseline_pair="x86_64-linux-gnu"