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_global.
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 # atomic_flags extra flags to pass to use atomic instructions
43 # defaults to nothing.
45 # cpu_defines_dir location of cpu_defines.h
46 # defaults to generic.
49 # error_constants_dir location of error_constants.h
50 # defaults to os/generic.
52 # It possibly modifies the following variables:
54 # OPT_LDFLAGS extra flags to pass when linking the library, of
56 # (defaults to empty in acinclude.m4)
58 # port_specific_symbol_files
59 # whitespace-seperated list of files containing
60 # additional symbols to export from the shared
61 # library, when symbol versioning is in use
64 # If the defaults will not work for your platform, you need only change the
65 # variables that won't work, i.e., you do not need to explicitly set a
66 # working variable to its default. Most hosts only need to change the two
67 # *_include_dir variables.
71 # Try to guess a default cpu_include_dir based on the name of the CPU. We
72 # cannot do this for os_include_dir; there are too many portable operating
73 # systems out there. :-)
76 atomic_word_dir=cpu/generic
78 atomicity_dir="cpu/generic"
79 cpu_defines_dir="cpu/generic"
81 abi_tweaks_dir="cpu/generic"
82 error_constants_dir="os/generic"
84 # HOST-SPECIFIC OVERRIDES
85 # Set any CPU-dependent bits.
87 # Provide a way to funnel exotic flavors and prefixed/postfixed chip
88 # variants into the established source config/cpu/* sub-directories.
89 # THIS TABLE IS SORTED. KEEP IT THAT WAY.
116 if test -d ${glibcxx_srcdir}/config/cpu/${host_cpu}; then
122 # Now look for the file(s) usually tied to a CPU model, and make
123 # default choices for those if they haven't been explicitly set
125 cpu_include_dir=cpu/${try_cpu}
128 # Set specific CPU overrides for cpu_defines_dir. Most can just use generic.
129 # THIS TABLE IS SORTED. KEEP IT THAT WAY.
130 case "${host_cpu}" in
132 cpu_defines_dir=cpu/powerpc
137 # Set specific CPU overrides for atomic_word_dir and atomic_flags.
138 # Most can just use generic.
139 # THIS TABLE IS SORTED. KEEP IT THAT WAY.
140 case "${host_cpu}" in
142 atomic_word_dir=cpu/alpha
145 atomic_word_dir=cpu/cris
148 atomic_word_dir=cpu/ia64
151 atomic_flags="-march=native"
154 atomic_word_dir=cpu/powerpc
157 atomic_word_dir=cpu/sparc
158 atomic_flags="-mcpu=v9"
163 # Set specific CPU overrides for atomicity_dir.
164 # This can be over-ridden in GLIBCXX_ENABLE_ATOMIC_BUILTINS.
165 # THIS TABLE IS SORTED. KEEP IT THAT WAY.
166 if test -f ${glibcxx_srcdir}/config/${cpu_include_dir}/atomicity.h ; then
167 atomicity_dir=$cpu_include_dir
171 if test -f ${glibcxx_srcdir}/config/${cpu_include_dir}/cxxabi_tweaks.h ; then
172 abi_tweaks_dir=$cpu_include_dir
176 # Set any OS-dependent bits.
177 # Set the os_include_dir.
178 # Set the error_costants_dir.
179 # Set c_model, c_compatibility here.
180 # If atomic ops and/or numeric limits are OS-specific rather than
181 # CPU-specifc, set those here too.
182 # THIS TABLE IS SORTED. KEEP IT THAT WAY.
184 aix4.[3456789]* | aix[56789]*)
185 # We set os_include_dir to os/aix only on AIX 4.3 and newer, but
186 # os/aix/atomicity.h works on earlier versions of AIX 4.*, so we
187 # explicitly duplicate the directory for 4.[<3].
188 os_include_dir="os/aix"
189 atomicity_dir="os/aix"
190 atomic_word_dir="os/aix"
194 os_include_dir="os/generic"
195 atomicity_dir="os/aix"
196 atomic_word_dir="os/aix"
199 os_include_dir="os/generic"
200 atomicity_dir="cpu/generic"
203 # Plain BSD attempts to share FreeBSD files.
204 os_include_dir="os/bsd/freebsd"
207 os_include_dir="os/newlib"
209 darwin | darwin[1-7] | darwin[1-7].*)
210 # On Darwin, performance is improved if libstdc++ is single-module.
211 # Up to at least 10.3.7, -flat_namespace is required for proper
212 # treatment of coalesced symbols.
213 OPT_LDFLAGS="${OPT_LDFLAGS} -Wl,-single_module -Wl,-flat_namespace"
214 os_include_dir="os/bsd/darwin"
216 darwin[89] | darwin[89].* | darwin[1-9][0-9]* )
217 # On Darwin, performance is improved if libstdc++ is single-module,
218 # and on 8+ compatibility is better if not -flat_namespace.
219 OPT_LDFLAGS="${OPT_LDFLAGS} -Wl,-single_module"
220 case "${host_cpu}" in
222 OPTIMIZE_CXXFLAGS="${OPTIMIZE_CXXFLAGS} -fvisibility-inlines-hidden"
225 os_include_dir="os/bsd/darwin"
227 *djgpp*) # leading * picks up "msdosdjgpp"
228 os_include_dir="os/djgpp"
231 os_include_dir="os/bsd/freebsd"
233 gnu* | linux* | kfreebsd*-gnu | knetbsd*-gnu)
234 if [ "$uclibc" = "yes" ]; then
235 os_include_dir="os/uclibc"
237 os_include_dir="os/gnu-linux"
241 os_include_dir="os/hpux"
243 irix[1-6] | irix[1-5].* | irix6.[0-4]*)
244 # This is known to work on at least IRIX 5.2 and 6.3.
245 os_include_dir="os/irix/irix5.2"
246 atomicity_dir=os/irix
247 atomic_word_dir=os/irix
250 os_include_dir="os/irix/irix6.5"
251 atomicity_dir=os/irix
252 atomic_word_dir=os/irix
255 os_include_dir="os/mingw32"
256 error_constants_dir="os/mingw32"
259 os_include_dir="os/bsd/netbsd"
262 os_include_dir="os/qnx/qnx6.1"
266 # This too-vague configuration does not provide enough information
267 # to select a ctype include, and thus os_include_dir is a crap shoot.
268 echo "Please specify the full version of Solaris, ie. solaris2.9 " 1>&2
271 solaris2.[789] | solaris2.1[0-9])
272 os_include_dir="os/solaris/solaris2.7"
275 os_include_dir="os/tpf"
278 os_include_dir="os/vxworks"
281 os_include_dir="os/generic"
286 # Set any OS-dependent and CPU-dependent bits.
287 # THIS TABLE IS SORTED. KEEP IT THAT WAY.
290 case "${host_cpu}" in
292 abi_baseline_pair=i486-linux-gnu
295 abi_baseline_pair=powerpc64-linux-gnu
298 abi_baseline_pair=s390-linux-gnu
301 abi_baseline_pair=s390x-linux-gnu
304 abi_baseline_pair=x86_64-linux-gnu
307 if test -d ${glibcxx_srcdir}/config/abi/post/${try_cpu}-linux-gnu; then
308 abi_baseline_pair=${try_cpu}-linux-gnu
313 port_specific_symbol_files="\$(srcdir)/../config/os/gnu-linux/arm-eabi-extra.ver"
318 port_specific_symbol_files="\$(srcdir)/../config/os/bsd/darwin/ppc-extra.ver"