libjava/configure.host

   1 # configure.host
   2
   3 # This shell script handles all host based configuration for libgcj.
   4 # It sets various shell variables based on the the host and the
   5 # configuration options.  You can modify this shell script without
   6 # needing to rerun autoconf.
   7
   8 # This shell script should be invoked as
   9 #   . configure.host
  10 # If it encounters an error, it will exit with a message.
  11
  12 # It uses the following shell variables:
  13 #   host                The configuration host
  14 #   host_cpu            The configuration host CPU
  15 #   target_optspace     --enable-target-optspace ("yes", "no", "")
  16
  17 # It sets the following shell variables:
  18 #   libgcj_cflags       Special CFLAGS to use when building
  19 #   libgcj_cxxflags     Special CXXFLAGS to use when building
  20 #   libgcj_javaflags    Special JAVAFLAGS to use when building
  21 #   libgcj_interpreter  If the bytecode interpreter supports this platform.
  22 #   enable_java_net_default  If java.net native code should be enabled by
  23 #                            default.
  24 #   enable_hash_synchronization_default  If hash synchronization should be
  25 #                                        enabled by default.
  26 #   enable_libgcj_sublibs_default  Whether to build libgcj as a bunch of
  27 #                                  separate shared libraries or in one
  28 #                                  monolithic one.
  29 #   sysdeps_dir         Directory containing system-dependent headers
  30 #   slow_pthread_self   The synchronization code should try to avoid
  31 #                       pthread_self calls by caching thread IDs in a hashtable
  32 #   can_unwind_signal   Set to "yes" if the EH unwinder supports throwing
  33 #                       from a signal handler.
  34 #   fallback_backtrace_h  Header to use for fallback backtrace implementation
  35 #                         (only for targets that don't support DWARF2 unwind)
  36 #   descriptor_h        Header to use for looking past function descriptors
  37 #   use_libgcj_bc       Whether to build a "libgcj-bc" library for BC-ABI
  38 #                       binaries to link against.
  39
  40 libgcj_flags=
  41 libgcj_cflags=
  42 libgcj_cxxflags=
  43 libgcj_javaflags=
  44 libgcj_interpreter=
  45 enable_java_net_default=yes
  46 enable_hash_synchronization_default=no
  47 enable_libgcj_sublibs_default=no
  48 sysdeps_dir=generic
  49 slow_pthread_self=
  50 can_unwind_signal=no
  51 fallback_backtrace_h=sysdep/generic/backtrace.h
  52
  53 case "${target_optspace}:${host}" in
  54   yes:*)
  55     libgcj_flags="${libgcj_flags} -Os"
  56     ;;
  57   :m32r-* | :d10v-* | :d30v-*)
  58     libgcj_flags="${libgcj_flags} -Os"
  59     ;;
  60   no:* | :*)
  61     # Nothing.
  62     ;;
  63 esac
  64
  65 AM_RUNTESTFLAGS=
  66
  67 # Set any host dependent compiler flags.
  68 # THIS TABLE IS SORTED.  KEEP IT THAT WAY.
  69
  70 echo "$target"
  71
  72 DIVIDESPEC=-fuse-divide-subroutine
  73 EXCEPTIONSPEC=-fnon-call-exceptions
  74 CHECKREFSPEC=
  75 BACKTRACESPEC=
  76 ATOMICSPEC=
  77
  78 # This case statement supports per-CPU defaults.
  79 case "${host}" in
  80   arm*-elf)
  81         with_libffi_default=no
  82         PROCESS=Ecos
  83         FILE=Posix
  84         CHECKREFSPEC=-fcheck-references
  85         EXCEPTIONSPEC=
  86         enable_java_net_default=no
  87         enable_getenv_properties_default=no
  88         enable_main_args_default=no
  89         sysdeps_dir=arm
  90         ;;
  91   arm*-linux*)
  92         libgcj_interpreter=yes
  93         sysdeps_dir=arm
  94         fallback_backtrace_h=sysdep/arm/backtrace.h
  95         libgcj_cxxflags=-Wno-abi
  96         ATOMICSPEC=-fuse-atomic-builtins
  97         # Work around a strange libtool feature that causes libraries
  98         # to be linked with libgcc_s but not libgcc.
  99         LDFLAGS="${LDFLAGS} -Wl,-lgcc"
 100         ;;
 101   mips-tx39-*|mipstx39-unknown-*)
 102         libgcj_flags="${libgcj_flags} -G 0"
 103         LDFLAGS="$LDFLAGS -Tjmr3904dram.ld"
 104         AM_RUNTESTFLAGS="--target_board=jmr3904-sim"
 105         # Use "Ecos" processes since they are a no-op.
 106         PROCESS=Ecos
 107         FILE=Posix
 108         enable_java_net_default=no
 109         enable_getenv_properties_default=no
 110         ;;
 111   mips*-*)
 112         libgcj_interpreter=yes
 113         ;;
 114   i686-*|i586-*|i486-*|i386-*)
 115         sysdeps_dir=i386
 116         # With -fomit-frame-pointer -maccumulate-outgoing-args (implied),
 117         # the .text section of libgcj.so is 30k larger, and the .eh_frame
 118         # section is 1.4M smaller.
 119         libgcj_flags="${libgcj_flags} -ffloat-store -fomit-frame-pointer"
 120         # On Solaris we have defined 'sun' which later conflicts with
 121         # namespace usage. So to work this away we use the below undefine.
 122         libgcj_flags="${libgcj_flags} -Usun"
 123         libgcj_interpreter=yes
 124         libgcj_cxxflags=
 125         libgcj_cflags=
 126         DIVIDESPEC=-fno-use-divide-subroutine
 127         enable_hash_synchronization_default=yes
 128         slow_pthread_self=yes
 129         ;;
 130   x86_64-*)
 131         sysdeps_dir=x86-64
 132         # For 64-bit we always use SSE registers for arithmetic,
 133         # which doesn't have the extra precision problems of the fpu.
 134         # But be careful about 32-bit multilibs.
 135         case " $CC " in
 136         *" -m32 "*)
 137                 libgcj_flags="${libgcj_flags} -ffloat-store" ;;
 138         esac
 139         libgcj_flags="${libgcj_flags} -fomit-frame-pointer"
 140         libgcj_cxxflags=
 141         libgcj_cflags=
 142         DIVIDESPEC=-fno-use-divide-subroutine
 143         enable_hash_synchronization_default=yes
 144         slow_pthread_self=yes
 145         libgcj_interpreter=yes
 146         ;;
 147   alpha*-*)
 148         sysdeps_dir=alpha
 149         libgcj_flags="${libgcj_flags} -mieee"
 150         libgcj_interpreter=yes
 151         enable_hash_synchronization_default=yes
 152         IEEESPEC=-mieee
 153         ;;
 154   hppa*-*)
 155         sysdeps_dir=pa
 156         libgcj_interpreter=yes
 157         enable_hash_synchronization_default=no
 158         ;;
 159   m68k-*)
 160         sysdeps_dir=m68k
 161         libgcj_interpreter=yes
 162         ;;
 163   powerpc64*-*)
 164         sysdeps_dir=powerpc
 165         libgcj_interpreter=yes
 166         if [ x`$CC -print-multi-os-directory` = x../lib64 ]; then
 167             libgcj_flags="${libgcj_flags} -mminimal-toc"
 168         fi
 169         enable_hash_synchronization_default=yes
 170         slow_pthread_self=yes
 171         ;;
 172   powerpc*-*)
 173         sysdeps_dir=powerpc
 174         libgcj_interpreter=yes
 175         enable_hash_synchronization_default=yes
 176         slow_pthread_self=yes
 177         ;;
 178   s390*-*)
 179         sysdeps_dir=s390
 180         libgcj_interpreter=yes
 181         DIVIDESPEC=-fno-use-divide-subroutine
 182         enable_hash_synchronization_default=yes
 183         ;;
 184   sparc*-*)
 185         sysdeps_dir=sparc
 186         # On Solaris we have defined 'sun' which later conflicts with
 187         # namespace usage. So to work this away we use the below undefine.
 188         libgcj_flags="${libgcj_flags} -Usun"
 189         libgcj_interpreter=yes
 190         ;;
 191   ia64-*)
 192         sysdeps_dir=ia64
 193         libgcj_flags="${libgcj_flags} -funwind-tables"
 194         libgcj_interpreter=yes
 195         enable_hash_synchronization_default=yes
 196         ;;
 197   sh-* | sh[34]*-*)
 198         sysdeps_dir=sh
 199         libgcj_flags="${libgcj_flags} -mieee"
 200         libgcj_interpreter=yes
 201         enable_hash_synchronization_default=yes
 202         IEEESPEC=-mieee
 203         ;;
 204 esac
 205
 206 # This case statement supports generic port properties and may refine
 207 # the above per-CPU defaults.  Note: If your OS implements
 208 # MD_FALLBACK_FRAME_STATE_FOR, then you want to set can_unwind_signal
 209 # here.
 210 case "${host}" in
 211   i[34567]86*-linux* | \
 212   powerpc*-linux* | \
 213   alpha*-linux* | \
 214   s390*-linux* | \
 215   sparc*-linux* | \
 216   ia64-* | \
 217   x86_64*-linux* | \
 218   hppa*-linux* | \
 219   m68k*-linux* | \
 220   sh-linux* | sh[34]*-linux*)
 221         can_unwind_signal=yes
 222         libgcj_ld_symbolic='-Wl,-Bsymbolic'
 223         if test x$slow_pthread_self = xyes \
 224            && test x$cross_compiling != xyes; then
 225           cat > conftest.c <<EOF
 226 #define _GNU_SOURCE 1
 227 #include <pthread.h>
 228 #include <stdlib.h>
 229 #include <sys/resource.h>
 230 #include <limits.h>
 231
 232 void *
 233 tf (void *arg __attribute__ ((unused)))
 234 {
 235   pthread_attr_t a;
 236   size_t s;
 237
 238   if (pthread_getattr_np (pthread_self (), &a)
 239       || pthread_attr_getstacksize (&a, &s)
 240       || s > 2 * PTHREAD_STACK_MIN)
 241     exit (1);
 242   exit (0);
 243 }
 244
 245 int
 246 main (int argc, char **argv)
 247 {
 248   pthread_t p;
 249   void *ret;
 250   struct rlimit r;
 251
 252   if (argc == 2)
 253     {
 254       r.rlim_cur = 2 * PTHREAD_STACK_MIN;
 255       r.rlim_max = 2 * PTHREAD_STACK_MIN;
 256       if (setrlimit (RLIMIT_STACK, &r))
 257         exit (1);
 258       execl (argv[1], argv[0], NULL);
 259       exit (1);
 260     }
 261
 262   if (pthread_create (&p, NULL, tf, NULL)
 263       || pthread_join (p, &ret))
 264     exit (1);
 265   exit (1);
 266 }
 267 EOF
 268           $CC -o conftest conftest.c -lpthread > /dev/null 2>&1 && \
 269           ./conftest ./conftest && slow_pthread_self=
 270           rm -f conftest conftest.c
 271         fi
 272         ;;
 273    i[34567]86*-kfreebsd*-gnu | x86_64*-kfreebsd*-gnu)
 274         libgcj_ld_symbolic='-Wl,-Bsymbolic'
 275         slow_pthread_self=
 276         ;;
 277   i[34567]86-*-solaris2.1[0-9]* )
 278         sysdeps_dir=x86-64
 279         DIVIDESPEC=-f%{m32:no-}%{!m32:%{!m64:no-}}%{m64:}use-divide-subroutine
 280         ;;
 281   mips-sgi-irix6* )
 282         sysdeps_dir=mips
 283         # disable interpreter, no closure support for N32 and N64 ABIs
 284         libgcj_interpreter=no
 285         ;;
 286   arm*-linux* )
 287         slow_pthread_self=no
 288         can_unwind_signal=no
 289         CHECKREFSPEC=-fcheck-references
 290         DIVIDESPEC=-fuse-divide-subroutine
 291         ;;
 292   mips*-*-linux* )
 293         sysdeps_dir=mips
 294         can_unwind_signal=yes
 295         DIVIDESPEC=-fno-use-divide-subroutine
 296         enable_hash_synchronization_default=yes
 297         ;;
 298   powerpc*-*-darwin*)
 299         enable_hash_synchronization_default=yes
 300         slow_pthread_self=
 301         can_unwind_signal=yes
 302         ;;
 303   i?86-*-darwin*)
 304         enable_hash_synchronization_default=yes
 305         slow_pthread_self=
 306         can_unwind_signal=no
 307         ;;
 308   i?86-*-darwin[912]*)
 309         can_unwind_signal=yes
 310         DIVIDESPEC=-f%{m32:no-}%{!m32:%{!m64:no-}}%{m64:}use-divide-subroutine
 311         ;;
 312   x86_64-*-darwin[912]*)
 313         enable_hash_synchronization_default=yes
 314         slow_pthread_self=
 315         can_unwind_signal=yes
 316         DIVIDESPEC=-fuse-divide-subroutine
 317         CHECKREFSPEC=-fcheck-references
 318         ;;
 319   *-*-freebsd*)
 320         slow_pthread_self=
 321         ;;
 322   *-mingw*)
 323         libgcj_flags="${libgcj_flags} -fno-omit-frame-pointer"
 324         # FIXME: win32_exception_handler( ) in win32.cc does not do the
 325         # right stuff yet w.r.t. SEH. Live with the following for now.
 326         can_unwind_signal=no
 327         CHECKREFSPEC=-fcheck-references
 328         DIVIDESPEC=-fuse-divide-subroutine
 329         ;;
 330   *-cygwin*)
 331         # The cygwin linker doesn't do 8-byte alignment by default, so
 332         # disable hash synchronization for now.
 333         enable_hash_synchronization_default=no
 334         slow_pthread_self=
 335         ;;
 336   hppa*-hp-hpux11.*)
 337         slow_pthread_self=no
 338         can_unwind_signal=yes
 339         DIVIDESPEC=-fuse-divide-subroutine
 340         ;;
 341 esac
 342
 343 case "${host}" in
 344   *-cygwin* | *-mingw*)
 345         fallback_backtrace_h=sysdep/i386/backtrace.h
 346         # We need a frame pointer on Windows, so override BACKTRACESPEC
 347         BACKTRACESPEC=
 348         # Win32 DLLs are limited to 64k exported symbols each.
 349         enable_libgcj_sublibs_default=yes
 350   ;;
 351 esac
 352
 353 case "${host}" in
 354   ia64-*)
 355         descriptor_h=sysdep/descriptor-y.h
 356         ;;
 357
 358   hppa*64*-*-hpux*)
 359         descriptor_h=sysdep/pa/descriptor-pa64-hpux.h
 360         ;;
 361
 362   hppa*-*-hpux*)
 363         descriptor_h=sysdep/pa/descriptor-pa32-hpux.h
 364         ;;
 365
 366   hppa*-*)
 367         descriptor_h=sysdep/pa/descriptor.h
 368         ;;
 369
 370   rs6000-* | powerpc*-*)
 371         descriptor_h=sysdep/powerpc/descriptor.h
 372         ;;
 373
 374   *)
 375         descriptor_h=sysdep/descriptor-n.h
 376         ;;
 377 esac
 378
 379 case "${host}" in
 380   *linux*|*-kfreebsd*-gnu|*-gnu*)
 381     use_libgcj_bc=yes
 382   ;;
 383   *)
 384     use_libgcj_bc=no
 385   ;;
 386 esac
 387
 388 libgcj_cflags="${libgcj_cflags} ${libgcj_flags}"
 389 libgcj_cxxflags="${libgcj_cxxflags} ${libgcj_flags}"
 390 libgcj_javaflags="${libgcj_javaflags} ${libgcj_flags}"