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