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 #   sysdeps_dir         Directory containing system-dependent headers
  27 #   slow_pthread_self   The synchronization code should try to avoid
  28 #                       pthread_self calls by caching thread IDs in a hashtable
  29 #   can_unwind_signal   Set to "yes" if the EH unwinder supports throwing
  30 #                       from a signal handler.
  31 #   fallback_backtrace_h  Header to use for fallback backtrace implementation
  32 #                         (only for targets that don't support DWARF2 unwind)
  33 #   descriptor_h        Header to use for looking past function descriptors
  34
  35 libgcj_flags=
  36 libgcj_cflags=
  37 libgcj_cxxflags=
  38 libgcj_javaflags=
  39 libgcj_interpreter=
  40 enable_java_net_default=yes
  41 enable_hash_synchronization_default=no
  42 sysdeps_dir=generic
  43 slow_pthread_self=
  44 can_unwind_signal=no
  45 fallback_backtrace_h=sysdep/generic/backtrace.h
  46
  47 case "${target_optspace}:${host}" in
  48   yes:*)
  49     libgcj_flags="${libgcj_flags} -Os"
  50     ;;
  51   :m32r-* | :d10v-* | :d30v-*)
  52     libgcj_flags="${libgcj_flags} -Os"
  53     ;;
  54   no:* | :*)
  55     # Nothing.
  56     ;;
  57 esac
  58
  59 AM_RUNTESTFLAGS=
  60
  61 # Set any host dependent compiler flags.
  62 # THIS TABLE IS SORTED.  KEEP IT THAT WAY.
  63
  64 echo "$target"
  65
  66 DIVIDESPEC=-fuse-divide-subroutine
  67 EXCEPTIONSPEC=-fnon-call-exceptions
  68 CHECKREFSPEC=
  69 BACKTRACESPEC=
  70
  71 # This case statement supports per-CPU defaults.
  72 case "${host}" in
  73   arm*-elf | strongarm*-elf | xscale*-elf)
  74         with_libffi_default=no
  75         PROCESS=Ecos
  76         FILE=Posix
  77         CHECKREFSPEC=-fcheck-references
  78         EXCEPTIONSPEC=
  79         enable_java_net_default=no
  80         enable_getenv_properties_default=no
  81         enable_main_args_default=no
  82         ;;
  83   mips-tx39-*|mipstx39-unknown-*)
  84         libgcj_flags="${libgcj_flags} -G 0"
  85         LDFLAGS="$LDFLAGS -Tjmr3904dram.ld"
  86         AM_RUNTESTFLAGS="--target_board=jmr3904-sim"
  87         # Use "Ecos" processes since they are a no-op.
  88         PROCESS=Ecos
  89         FILE=Posix
  90         enable_java_net_default=no
  91         enable_getenv_properties_default=no
  92         ;;
  93   mipsel-*|mips-*)
  94         libgcj_interpreter=yes
  95         ;;
  96   i686-*|i586-*|i486-*|i386-*)
  97         sysdeps_dir=i386
  98         # With -fomit-frame-pointer -maccumulate-outgoing-args (implied),
  99         # the .text section of libgcj.so is 30k larger, and the .eh_frame
 100         # section is 1.4M smaller.
 101         libgcj_flags="${libgcj_flags} -ffloat-store -fomit-frame-pointer"
 102         libgcj_interpreter=yes
 103         libgcj_cxxflags=
 104         libgcj_cflags=
 105         DIVIDESPEC=-fno-use-divide-subroutine
 106         enable_hash_synchronization_default=yes
 107         slow_pthread_self=yes
 108         ;;
 109   x86_64-*)
 110         sysdeps_dir=x86-64
 111         # For 64-bit we always use SSE registers for arithmetic,
 112         # which doesn't have the extra precision problems of the fpu.
 113         # But be careful about 32-bit multilibs.
 114         case " $CC " in
 115         *" -m32 "*)
 116                 libgcj_flags="${libgcj_flags} -ffloat-store" ;;
 117         esac
 118         libgcj_flags="${libgcj_flags} -fomit-frame-pointer"
 119         libgcj_cxxflags=
 120         libgcj_cflags=
 121         DIVIDESPEC=-fno-use-divide-subroutine
 122         enable_hash_synchronization_default=yes
 123         slow_pthread_self=yes
 124         libgcj_interpreter=yes
 125         ;;
 126   alpha*-*)
 127         sysdeps_dir=alpha
 128         libgcj_flags="${libgcj_flags} -mieee"
 129         libgcj_interpreter=yes
 130         enable_hash_synchronization_default=yes
 131         IEEESPEC=-mieee
 132         ;;
 133   hppa*-*)
 134         sysdeps_dir=pa
 135         libgcj_interpreter=yes
 136         enable_hash_synchronization_default=no
 137         ;;
 138   powerpc64*-*)
 139         sysdeps_dir=powerpc
 140         libgcj_interpreter=yes
 141         if [ x`$CC -print-multi-os-directory` = x../lib64 ]; then
 142             libgcj_flags="${libgcj_flags} -mminimal-toc"
 143         fi
 144         enable_hash_synchronization_default=yes
 145         slow_pthread_self=yes
 146         ;;
 147   powerpc*-*)
 148         sysdeps_dir=powerpc
 149         libgcj_interpreter=yes
 150         enable_hash_synchronization_default=yes
 151         slow_pthread_self=yes
 152         ;;
 153   s390*-*)
 154         sysdeps_dir=s390
 155         libgcj_interpreter=yes
 156         DIVIDESPEC=-fno-use-divide-subroutine
 157         enable_hash_synchronization_default=yes
 158         ;;
 159   sparc*-*)
 160         libgcj_interpreter=yes
 161         ;;
 162   ia64-*)
 163         sysdeps_dir=ia64
 164         libgcj_flags="${libgcj_flags} -funwind-tables"
 165         libgcj_interpreter=yes
 166         enable_hash_synchronization_default=yes
 167         ;;
 168   sh-* | sh[34]*-*)
 169         sysdeps_dir=sh
 170         libgcj_flags="${libgcj_flags} -mieee"
 171         libgcj_interpreter=yes
 172         enable_hash_synchronization_default=yes
 173         IEEESPEC=-mieee
 174         ;;
 175 esac
 176
 177 # This case statement supports generic port properties and may refine
 178 # the above per-CPU defaults.  Note: If your OS implements
 179 # MD_FALLBACK_FRAME_STATE_FOR, then you want to set can_unwind_signal
 180 # here.
 181 case "${host}" in
 182   i[34567]86*-linux* | \
 183   powerpc*-linux* | \
 184   alpha*-linux* | \
 185   s390*-linux* | \
 186   sparc*-linux* | \
 187   ia64-* | \
 188   x86_64*-linux* | \
 189   hppa*-linux* | \
 190   sh-linux* | sh[34]*-linux*)
 191         can_unwind_signal=yes
 192         libgcj_ld_symbolic='-Wl,-Bsymbolic'
 193         if test x$slow_pthread_self = xyes \
 194            && test x$cross_compiling != xyes; then
 195           cat > conftest.c <<EOF
 196 #define _GNU_SOURCE 1
 197 #include <pthread.h>
 198 #include <stdlib.h>
 199 #include <sys/resource.h>
 200 #include <limits.h>
 201
 202 void *
 203 tf (void *arg __attribute__ ((unused)))
 204 {
 205   pthread_attr_t a;
 206   size_t s;
 207
 208   if (pthread_getattr_np (pthread_self (), &a)
 209       || pthread_attr_getstacksize (&a, &s)
 210       || s > 2 * PTHREAD_STACK_MIN)
 211     exit (1);
 212   exit (0);
 213 }
 214
 215 int
 216 main (int argc, char **argv)
 217 {
 218   pthread_t p;
 219   void *ret;
 220   struct rlimit r;
 221
 222   if (argc == 2)
 223     {
 224       r.rlim_cur = 2 * PTHREAD_STACK_MIN;
 225       r.rlim_max = 2 * PTHREAD_STACK_MIN;
 226       if (setrlimit (RLIMIT_STACK, &r))
 227         exit (1);
 228       execl (argv[1], argv[0], NULL);
 229       exit (1);
 230     }
 231
 232   if (pthread_create (&p, NULL, tf, NULL)
 233       || pthread_join (p, &ret))
 234     exit (1);
 235   exit (1);
 236 }
 237 EOF
 238           $CC -o conftest conftest.c -lpthread > /dev/null 2>&1 && \
 239           ./conftest ./conftest && slow_pthread_self=
 240           rm -f conftest conftest.c
 241         fi
 242         ;;
 243   i[34567]86-*-solaris2.1[0-9]* )
 244         sysdeps_dir=x86-64
 245         DIVIDESPEC=-f%{m32:no-}%{!m32:%{!m64:no-}}%{m64:}use-divide-subroutine
 246         ;;
 247   mips*-*-linux* )
 248         sysdeps_dir=mips
 249         can_unwind_signal=yes
 250         DIVIDESPEC=-fno-use-divide-subroutine
 251         case "${host}" in
 252             mipsel*-linux* | mipsisa32el*-linux*)
 253                 enable_hash_synchronization_default=yes
 254             ;;
 255         esac
 256         ;;
 257   powerpc*-*-darwin*)
 258         enable_hash_synchronization_default=yes
 259         slow_pthread_self=
 260         can_unwind_signal=yes
 261         ;;
 262   *-*-freebsd*)
 263         slow_pthread_self=
 264         ;;
 265   *-mingw*)
 266         libgcj_flags="${libgcj_flags} -fno-omit-frame-pointer"
 267         # FIXME: win32_exception_handler( ) in win32.cc does not do the
 268         # right stuff yet w.r.t. SEH. Live with the following for now.
 269         can_unwind_signal=no
 270         CHECKREFSPEC=-fcheck-references
 271         DIVIDESPEC=-fuse-divide-subroutine
 272         ;;
 273   *-cygwin*)
 274         # The cygwin linker doesn't do 8-byte alignment by default, so
 275         # disable hash synchronization for now.
 276         enable_hash_synchronization_default=no
 277         slow_pthread_self=
 278         ;;
 279   hppa*-hp-hpux11.*)
 280         slow_pthread_self=no
 281         can_unwind_signal=yes
 282         DIVIDESPEC=-fuse-divide-subroutine
 283         ;;
 284 esac
 285
 286 case "${host}" in
 287   *-cygwin* | *-mingw*)
 288         fallback_backtrace_h=sysdep/i386/backtrace.h
 289         # We need a frame pointer on Windows, so override BACKTRACESPEC
 290         BACKTRACESPEC=
 291   ;;
 292 esac
 293
 294 case "${host}" in
 295   ia64-*)
 296         descriptor_h=sysdep/descriptor-y.h
 297         ;;
 298
 299   hppa*64*-*-hpux*)
 300         descriptor_h=sysdep/pa/descriptor-pa64-hpux.h
 301         ;;
 302
 303   hppa*-*-hpux*)
 304         descriptor_h=sysdep/pa/descriptor-pa32-hpux.h
 305         ;;
 306
 307   hppa*-*)
 308         descriptor_h=sysdep/pa/descriptor.h
 309         ;;
 310
 311   rs6000-* | powerpc*-*)
 312         descriptor_h=sysdep/powerpc/descriptor.h
 313         ;;
 314
 315   *)
 316         descriptor_h=sysdep/descriptor-n.h
 317         ;;
 318 esac
 319
 320 libgcj_cflags="${libgcj_cflags} ${libgcj_flags}"
 321 libgcj_cxxflags="${libgcj_cxxflags} ${libgcj_flags}"
 322 libgcj_javaflags="${libgcj_javaflags} ${libgcj_flags}"