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.
120 if test -d ${glibcxx_srcdir}/config/cpu/${host_cpu}; then
126 # Now look for the file(s) usually tied to a CPU model, and make
127 # default choices for those if they haven't been explicitly set
129 cpu_include_dir=cpu/${try_cpu}
132 # Set specific CPU overrides for cpu_defines_dir. Most can just use generic.
133 # THIS TABLE IS SORTED. KEEP IT THAT WAY.
134 case "${host_cpu}" in
136 cpu_defines_dir=cpu/powerpc
141 # Set specific CPU overrides for atomic_word_dir and atomic_flags.
142 # Most can just use generic.
143 # THIS TABLE IS SORTED. KEEP IT THAT WAY.
144 case "${host_cpu}" in
146 atomic_word_dir=cpu/alpha
149 atomic_word_dir=cpu/cris
152 atomic_word_dir=cpu/ia64
155 atomic_flags="-march=native"
158 atomic_word_dir=cpu/powerpc
161 atomic_word_dir=cpu/sparc
162 atomic_flags="-mcpu=v9"
167 # Set specific CPU overrides for atomicity_dir.
168 # This can be over-ridden in GLIBCXX_ENABLE_ATOMIC_BUILTINS.
169 # THIS TABLE IS SORTED. KEEP IT THAT WAY.
170 if test -f ${glibcxx_srcdir}/config/${cpu_include_dir}/atomicity.h ; then
171 atomicity_dir=$cpu_include_dir
175 if test -f ${glibcxx_srcdir}/config/${cpu_include_dir}/cxxabi_tweaks.h ; then
176 abi_tweaks_dir=$cpu_include_dir
180 # Set any OS-dependent bits.
181 # Set the os_include_dir.
182 # Set the error_costants_dir.
183 # Set c_model, c_compatibility here.
184 # If atomic ops and/or numeric limits are OS-specific rather than
185 # CPU-specifc, set those here too.
186 # THIS TABLE IS SORTED. KEEP IT THAT WAY.
188 aix4.[3456789]* | aix[56789]*)
189 # We set os_include_dir to os/aix only on AIX 4.3 and newer, but
190 # os/aix/atomicity.h works on earlier versions of AIX 4.*, so we
191 # explicitly duplicate the directory for 4.[<3].
192 os_include_dir="os/aix"
193 atomicity_dir="os/aix"
194 atomic_word_dir="os/aix"
198 os_include_dir="os/generic"
199 atomicity_dir="os/aix"
200 atomic_word_dir="os/aix"
203 os_include_dir="os/generic"
204 atomicity_dir="cpu/generic"
207 # Plain BSD attempts to share FreeBSD files.
208 os_include_dir="os/bsd/freebsd"
211 os_include_dir="os/newlib"
212 OPT_LDFLAGS="${OPT_LDFLAGS} -no-undefined -bindir \$(bindir)"
214 darwin | darwin[1-7] | darwin[1-7].*)
215 # On Darwin, performance is improved if libstdc++ is single-module.
216 # Up to at least 10.3.7, -flat_namespace is required for proper
217 # treatment of coalesced symbols.
218 OPT_LDFLAGS="${OPT_LDFLAGS} -Wl,-single_module -Wl,-flat_namespace"
219 os_include_dir="os/bsd/darwin"
221 darwin[89] | darwin[89].* | darwin[1-9][0-9]* )
222 # On Darwin, performance is improved if libstdc++ is single-module,
223 # and on 8+ compatibility is better if not -flat_namespace.
224 OPT_LDFLAGS="${OPT_LDFLAGS} -Wl,-single_module"
225 case "${host_cpu}" in
227 OPTIMIZE_CXXFLAGS="${OPTIMIZE_CXXFLAGS} -fvisibility-inlines-hidden"
230 os_include_dir="os/bsd/darwin"
232 *djgpp*) # leading * picks up "msdosdjgpp"
233 os_include_dir="os/djgpp"
236 os_include_dir="os/bsd/freebsd"
238 gnu* | linux* | kfreebsd*-gnu | knetbsd*-gnu)
239 if [ "$uclibc" = "yes" ]; then
240 os_include_dir="os/uclibc"
242 os_include_dir="os/gnu-linux"
246 os_include_dir="os/hpux"
248 irix[1-6] | irix[1-5].* | irix6.[0-4]*)
249 # This is known to work on at least IRIX 5.2 and 6.3.
250 os_include_dir="os/irix/irix5.2"
251 atomicity_dir=os/irix
252 atomic_word_dir=os/irix
255 os_include_dir="os/irix/irix6.5"
256 atomicity_dir=os/irix
257 atomic_word_dir=os/irix
260 os_include_dir="os/mingw32"
261 error_constants_dir="os/mingw32"
262 OPT_LDFLAGS="${OPT_LDFLAGS} -no-undefined -bindir \$(bindir)"
265 os_include_dir="os/bsd/netbsd"
268 os_include_dir="os/qnx/qnx6.1"
272 # This too-vague configuration does not provide enough information
273 # to select a ctype include, and thus os_include_dir is a crap shoot.
274 echo "Please specify the full version of Solaris, ie. solaris2.9 " 1>&2
277 solaris2.[89] | solaris2.1[0-9])
278 os_include_dir="os/solaris/solaris2.7"
281 os_include_dir="os/tpf"
284 os_include_dir="os/vxworks"
287 os_include_dir="os/generic"
292 # Set any OS-dependent and CPU-dependent bits.
293 # THIS TABLE IS SORTED. KEEP IT THAT WAY.
296 case "${host_cpu}" in
298 abi_baseline_pair=i486-linux-gnu
301 abi_baseline_pair=mips64-linux-gnu
304 abi_baseline_pair=powerpc64-linux-gnu
307 abi_baseline_pair=s390-linux-gnu
310 abi_baseline_pair=s390x-linux-gnu
313 abi_baseline_pair=x86_64-linux-gnu
316 if test -d ${glibcxx_srcdir}/config/abi/post/${try_cpu}-linux-gnu; then
317 abi_baseline_pair=${try_cpu}-linux-gnu
322 port_specific_symbol_files="\$(srcdir)/../config/os/gnu-linux/arm-eabi-extra.ver"
327 port_specific_symbol_files="\$(srcdir)/../config/os/bsd/darwin/ppc-extra.ver"