configure.host revision 146897
1# configure.host 2# 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. 7# 8# You should read docs/html/17_intro/porting.* to make sense of this file. 9# 10# 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 15# 16# 17# It sets the following shell variables: 18# 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 atomicity_include_dir. 22# 23# os_include_dir OS-specific directory, defaults to os/generic. 24# 25# c_model the "C" header model, defaults to c_std. 26# 27# c_compatibility if "C" compatibility headers are necessary, 28# defaults to no. 29# 30# abi_baseline_pair directory name for ABI compat testing, 31# defaults to host_cpu-host_os (as per config.guess) 32# 33# atomicity_dir location of atomicity.h, 34# defaults to cpu_include_dir 35# 36# atomic_word_dir location of atomic_word.h 37# defaults to generic. 38# 39# It possibly modifies the following variables: 40# 41# OPT_LDFLAGS extra flags to pass when linking the library, of 42# the form '-Wl,blah' 43# (defaults to empty in acinclude.m4) 44# 45# port_specific_symbol_files 46# whitespace-seperated list of files containing 47# additional symbols to export from the shared 48# library, when symbol versioning is in use 49# 50# 51# If the defaults will not work for your platform, you need only change the 52# variables that won't work, i.e., you do not need to explicitly set a 53# working variable to its default. Most hosts only need to change the two 54# *_include_dir variables. 55 56 57# DEFAULTS 58# Try to guess a default cpu_include_dir based on the name of the CPU. We 59# cannot do this for os_include_dir; there are too many portable operating 60# systems out there. :-) 61c_model=c_std 62c_compatibility=no 63atomic_word_dir=cpu/generic 64 65# HOST-SPECIFIC OVERRIDES 66# Set any CPU-dependent bits. 67# Here we override defaults and catch more general cases due to naming 68# conventions (e.g., chip_name* to catch all variants). 69 70# THIS TABLE IS SORTED. KEEP IT THAT WAY. 71case "${host_cpu}" in 72 alpha*) 73 try_cpu=alpha 74 ;; 75 i[567]86 | x86_64) 76 try_cpu=i486 77 ;; 78 hppa*) 79 try_cpu=hppa 80 ;; 81 mips*) 82 # NB: cpu/mips/atomicity.h needs MIPS II or above. 83 # Of course, there is no sane way to test for this, no ABI macro, 84 # and no consistent host_cpu name differentiation. Therefore, only 85 # use it where it is known to be safe, ie it runs linux (see below). 86 try_cpu=generic 87 ;; 88 m680[246]0) 89 try_cpu=m68k 90 ;; 91 powerpc* | rs6000) 92 try_cpu=powerpc 93 ;; 94 s390x) 95 try_cpu=s390 96 ;; 97 sparc* | ultrasparc) 98 try_cpu=sparc 99 ;; 100 *) 101 if test -f ${glibcxx_srcdir}/config/cpu/${host_cpu}/atomicity.h; then 102 try_cpu=${host_cpu} 103 else 104 try_cpu=generic 105 fi 106 ;; 107esac 108 109# Set specific CPU overrides for atomic_word_dir. Most can just use generic. 110# THIS TABLE IS SORTED. KEEP IT THAT WAY. 111case "${host_cpu}" in 112 cris*) 113 atomic_word_dir=cpu/cris 114 ;; 115 sparc* | ultrasparc) 116 atomic_word_dir=cpu/sparc 117 ;; 118esac 119 120# Now look for the file(s) usually tied to a CPU model, and make 121# default choices for those if they haven't been explicitly set 122# already. 123cpu_include_dir="cpu/${try_cpu}" 124atomicity_dir=$cpu_include_dir 125abi_baseline_pair=${try_cpu}-${host_os} 126 127 128# Set any OS-dependent bits. 129# Set the os_include_dir. 130# Set c_model, c_compatibility here. 131# If atomic ops and/or numeric limits are OS-specific rather than 132# CPU-specifc, set those here too. 133# THIS TABLE IS SORTED. KEEP IT THAT WAY. 134case "${host_os}" in 135 aix4.[3456789]* | aix[56789]*) 136 # We set os_include_dir to os/aix only on AIX 4.3 and newer, but 137 # os/aix/atomicity.h works on earlier versions of AIX 4.*, so we 138 # explicitly duplicate the directory for 4.[<3]. 139 os_include_dir="os/aix" 140 atomicity_dir="os/aix" 141 OPT_LDFLAGS="-Wl,-G" 142 ;; 143 aix4.*) 144 os_include_dir="os/generic" 145 atomicity_dir="os/aix" 146 ;; 147 aix*) 148 os_include_dir="os/generic" 149 atomicity_dir="cpu/generic" 150 ;; 151 bsd*) 152 # Plain BSD attempts to share FreeBSD files. 153 os_include_dir="os/bsd/freebsd" 154 ;; 155 cygwin*) 156 os_include_dir="os/newlib" 157 ;; 158 *djgpp*) # leading * picks up "msdosdjgpp" 159 os_include_dir="os/djgpp" 160 ;; 161 freebsd*) 162 os_include_dir="os/bsd/freebsd" 163 ;; 164 gnu* | linux* | kfreebsd*-gnu | knetbsd*-gnu) 165 os_include_dir="os/gnu-linux" 166 ;; 167 hpux*) 168 os_include_dir="os/hpux" 169 ;; 170 irix[1-6] | irix[1-5].* | irix6.[0-4]*) 171 # This is known to work on at least IRIX 5.2 and 6.3. 172 os_include_dir="os/irix/irix5.2" 173 atomicity_dir=os/irix 174 atomic_word_dir=os/irix 175 ;; 176 irix6.5*) 177 os_include_dir="os/irix/irix6.5" 178 atomicity_dir=os/irix 179 atomic_word_dir=os/irix 180 ;; 181 mingw32*) 182 os_include_dir="os/mingw32" 183 ;; 184 netbsd*) 185 os_include_dir="os/bsd/netbsd" 186 ;; 187 qnx6.[12]*) 188 os_include_dir="os/qnx/qnx6.1" 189 c_model=c 190 ;; 191 solaris2) 192 # This too-vague configuration does not provide enough information 193 # to select a ctype include, and thus os_include_dir is a crap shoot. 194 echo "Please specify the full version of Solaris, ie. solaris2.9 " 1>&2 195 exit 1; 196 ;; 197 solaris2.5 | solaris2.5.[0-9]) 198 os_include_dir="os/solaris/solaris2.5" 199 ;; 200 solaris2.6) 201 os_include_dir="os/solaris/solaris2.6" 202 ;; 203 solaris2.[789] | solaris2.1[0-9]) 204 os_include_dir="os/solaris/solaris2.7" 205 ;; 206 tpf) 207 os_include_dir="os/tpf" 208 ;; 209 vxworks) 210 os_include_dir="os/vxworks" 211 ;; 212 windiss*) 213 os_include_dir="os/windiss" 214 ;; 215 *) 216 os_include_dir="os/generic" 217 ;; 218esac 219 220 221# Set any OS-dependent and CPU-dependent bits. 222# THIS TABLE IS SORTED. KEEP IT THAT WAY. 223case "${host}" in 224 alpha*-*-freebsd5*) 225 abi_baseline_pair="alpha-freebsd5" 226 ;; 227 arm*-*-linux*) 228 abi_baseline_pair="arm-linux-gnu" 229 ;; 230 i*86-*-freebsd4*) 231 abi_baseline_pair="i386-freebsd4" 232 ;; 233 i*86-*-freebsd5*) 234 abi_baseline_pair="i386-freebsd5" 235 ;; 236 mips*-*-linux*) 237 atomicity_dir="cpu/mips" 238 abi_baseline_pair="mips-linux-gnu" 239 cpu_include_dir="cpu/mips" 240 ;; 241 s390-*-linux*) 242 abi_baseline_pair="s390-linux-gnu" 243 ;; 244 s390x-*-linux*) 245 abi_baseline_pair="s390x-linux-gnu" 246 ;; 247 sparc*-*-freebsd5*) 248 abi_baseline_pair="sparc-freebsd5" 249 ;; 250 x86_64-*-linux*) 251 abi_baseline_pair="x86_64-linux-gnu" 252 ;; 253esac 254