source: trunk/src/gcc/libjava/configure.in@ 1614

dnl Process this with autoconf to create configure
AC_INIT(java/lang/System.java)

# This works around the fact that libtool configuration may change LD
# for this particular configuration, but some shells, instead of
# keeping the changes in LD private, export them just because LD is
# exported.
ORIGINAL_LD_FOR_MULTILIBS=$LD

AC_PROG_LN_S

dnl We use these options to decide which functions to include.
AC_ARG_WITH(target-subdir,
[  --with-target-subdir=SUBDIR
                           configuring in a subdirectory])
AC_ARG_WITH(cross-host,
[  --with-cross-host=HOST  configuring with a cross compiler])

AC_ARG_WITH(newlib,
[  --with-newlib           Configuring with newlib])

LIBGCJ_CONFIGURE(.)

AM_CONFIG_HEADER(include/config.h gcj/libgcj-config.h)

# Only use libltdl for native builds.
if test -z "${with_cross_host}"; then
   AC_LIBLTDL_CONVENIENCE
   AC_LIBTOOL_DLOPEN
   DIRLTDL=libltdl
   AC_DEFINE(USE_LTDL)
   # Sigh.  Libtool's macro doesn't do the right thing.
   INCLTDL="-I\$(top_srcdir)/libltdl $INCLTDL"
   # FIXME: this is a hack.
   sub_auxdir="`cd $ac_aux_dir && ${PWDCMD-pwd}`"
   ac_configure_args="$ac_configure_args --with-auxdir=$sub_auxdir"
fi
AC_SUBST(INCLTDL)
AC_SUBST(LIBLTDL)
AC_SUBST(DIRLTDL)
AM_PROG_LIBTOOL
AC_CONFIG_SUBDIRS($DIRLTDL)

if test -z "$with_target_subdir" || test "$with_target_subdir" = "."; then
   COMPPATH=.
else
   COMPPATH=..
fi
AC_SUBST(COMPPATH)

dnl The -no-testsuite modules omit the test subdir.
AM_CONDITIONAL(TESTSUBDIR, test -d $srcdir/testsuite)

dnl Should the runtime set system properties by examining the 
dnl environment variable GCJ_PROPERTIES?
AC_ARG_ENABLE(getenv-properties,
[  --disable-getenv-properties
                          don't set system properties from GCJ_PROPERTIES])

dnl Whether GCJ_PROPERTIES is used depends on the target.
if test -z "$enable_getenv_properties"; then
   enable_getenv_properties=${enable_getenv_properties_default-yes}
fi
if test "$enable_getenv_properties" = no; then
   AC_DEFINE(DISABLE_GETENV_PROPERTIES)
fi

dnl Whether we should use arguments to main()
if test -z "$enable_main_args"; then
   enable_main_args=${enable_main_args_default-yes}
fi
if test "$enable_main_args" = no; then
   AC_DEFINE(DISABLE_MAIN_ARGS)
fi


dnl Should we use hashtable-based synchronization?
dnl Currently works only for Linux X86/ia64
dnl Typically faster and more space-efficient
AC_ARG_ENABLE(hash-synchronization,
[  --enable-hash-synchronization
                          Use global hash table for monitor locks])

if test -z "$enable_hash_synchronization"; then
   enable_hash_synchronization=$enable_hash_synchronization_default
fi

dnl configure.host sets slow_pthread_self if the synchronization code should 
dnl try to avoid pthread_self calls by caching thread IDs in a hashtable.
if test "${slow_pthread_self}" = "yes"; then
  AC_DEFINE(SLOW_PTHREAD_SELF)
fi


dnl See if the user has requested runtime debugging.
LIBGCJDEBUG="false"
AC_SUBST(LIBGCJDEBUG)
AC_ARG_ENABLE(libgcj-debug,
[  --enable-libgcj-debug   enable runtime debugging code],
  if test "$enable_libgcj_debug" = yes; then
    AC_DEFINE(DEBUG)
    LIBGCJDEBUG="true"
  fi)

dnl See if the user has the interpreter included.
AC_ARG_ENABLE(interpreter,
[  --enable-interpreter    enable interpreter],
  if test "$enable_interpreter" = yes; then
    # This can also be set in configure.host.
    libgcj_interpreter=yes
  elif test "$enable_interpreter" = no; then
    libgcj_interpreter=no
  fi)

if test "$libgcj_interpreter" = yes; then
   AC_DEFINE(INTERPRETER)
fi
INTERPRETER="$libgcj_interpreter"
AC_SUBST(INTERPRETER)

AC_MSG_CHECKING([for exception model to use])
AC_LANG_SAVE
AC_LANG_CPLUSPLUS
AC_ARG_ENABLE(sjlj-exceptions,
[  --enable-sjlj-exceptions  force use of builtin_setjmp for exceptions],
[:],
[dnl Botheration.  Now we've got to detect the exception model.
dnl Link tests against libgcc.a are problematic since -- at least
dnl as of this writing -- we've not been given proper -L bits for
dnl single-tree newlib and libgloss.
dnl
dnl This is what AC_TRY_COMPILE would do if it didn't delete the
dnl conftest files before we got a change to grep them first.
cat > conftest.$ac_ext << EOF
[#]line __oline__ "configure"
struct S { ~S(); };
void bar();
void foo()
{
  S s;
  bar();
}
EOF
old_CXXFLAGS="$CXXFLAGS"  
CXXFLAGS=-S
if AC_TRY_EVAL(ac_compile); then
  if grep _Unwind_SjLj_Resume conftest.s >/dev/null 2>&1 ; then
    enable_sjlj_exceptions=yes
  elif grep _Unwind_Resume conftest.s >/dev/null 2>&1 ; then
    enable_sjlj_exceptions=no
  fi
fi
CXXFLAGS="$old_CXXFLAGS"
rm -f conftest*])
if test x$enable_sjlj_exceptions = xyes; then
  AC_DEFINE(SJLJ_EXCEPTIONS, 1,
        [Define if the compiler is configured for setjmp/longjmp exceptions.])
  ac_exception_model_name=sjlj
elif test x$enable_sjlj_exceptions = xno; then
  ac_exception_model_name="call frame"
else
  AC_MSG_ERROR([unable to detect exception model])
fi
AC_LANG_RESTORE
AC_MSG_RESULT($ac_exception_model_name)

# If we are non using SJLJ exceptions, and this host does not have support 
# for unwinding from a signal handler, enable checked dereferences and divides.
if test $can_unwind_signal = no && test $enable_sjlj_exceptions = no; then
  CHECKREFSPEC=-fcheck-references
  DIVIDESPEC=-fuse-divide-subroutine
  EXCEPTIONSPEC=
fi

dnl See if the user wants to disable java.net.  This is the mildly
dnl ugly way that we admit that target-side configuration sucks.
AC_ARG_ENABLE(java-net,
[  --disable-java-net      disable java.net])

dnl Whether java.net is built by default can depend on the target.
if test -z "$enable_java_net"; then
   enable_java_net=${enable_java_net_default-yes}
fi
if test "$enable_java_net" = no; then
   AC_DEFINE(DISABLE_JAVA_NET)
fi

dnl See if the user wants to configure without libffi.  Some
dnl architectures don't support it, and default values are set in 
dnl configure.host.
AC_ARG_WITH(libffi,
[  --without-libffi        don't use libffi],,with_libffi=${with_libffi_default-yes})

LIBFFI=
LIBFFIINCS=
if test "$with_libffi" != no; then
   AC_DEFINE(USE_LIBFFI)
   LIBFFI=../libffi/libffi_convenience.la
   LIBFFIINCS='-I$(top_srcdir)/../libffi/include -I../libffi/include'
fi
AC_SUBST(LIBFFI)
AC_SUBST(LIBFFIINCS)

dnl See if the user wants to disable JVMPI support.
AC_ARG_ENABLE(jvmpi,
[  --disable-jvmpi         disable JVMPI support])

if test "$enable_jvmpi" != no; then
    AC_DEFINE(ENABLE_JVMPI)
fi

dnl If the target is an eCos system, use the appropriate eCos
dnl I/O routines.
dnl FIXME: this should not be a local option but a global target
dnl system; at present there is no eCos target.
TARGET_ECOS=${PROCESS-"no"}
AC_ARG_WITH(ecos,
[  --with-ecos             enable runtime eCos target support],
TARGET_ECOS="$with_ecos"
)

PLATFORMOBJS=
case "$TARGET_ECOS" in
   no) case "$host" in
      *mingw*)
            PLATFORM=Win32
            PLATFORMOBJS=win32.lo
            PLATFORMH=win32.h
        CHECK_FOR_BROKEN_MINGW_LD
      ;;
      *)
            PLATFORM=Posix
            PLATFORMOBJS=posix.lo
            PLATFORMH=posix.h
      ;;
      esac
      ;;
   *)
      PLATFORM=Ecos
      AC_DEFINE(ECOS)
      PLATFORMOBJS=posix.lo
      PLATFORMH=posix.h
      ;;
esac
AC_SUBST(PLATFORMOBJS)
AC_LINK_FILES(include/$PLATFORMH, include/platform.h)

AC_EGREP_HEADER(uint32_t, stdint.h, AC_DEFINE(HAVE_INT32_DEFINED))
AC_EGREP_HEADER(uint32_t, inttypes.h, AC_DEFINE(HAVE_INT32_DEFINED))
AC_EGREP_HEADER(u_int32_t, sys/types.h, AC_DEFINE(HAVE_BSD_INT32_DEFINED))
AC_EGREP_HEADER(u_int32_t, sys/config.h, AC_DEFINE(HAVE_BSD_INT32_DEFINED))


dnl These may not be defined in a non-ANS conformant embedded system.
dnl FIXME: Should these case a runtime exception in that case?
AC_EGREP_HEADER(mktime, time.h, AC_DEFINE(HAVE_MKTIME))
AC_EGREP_HEADER(localtime, time.h, AC_DEFINE(HAVE_LOCALTIME))

dnl Create the subdirectory for natFileDescriptor.cc, or the attempt
dnl to create the link will fail.
test -d java || mkdir java
test -d java/io || mkdir java/io
test -d gnu || mkdir gnu
AC_LINK_FILES(java/io/natFile${FILE-${PLATFORM}}.cc, java/io/natFile.cc)
AC_LINK_FILES(java/io/natFileDescriptor${FILE-${PLATFORM}}.cc, java/io/natFileDescriptor.cc)

dnl Likewise for ConcreteProcess.java and natConcreteProcess.cc.
test -d java/lang || mkdir java/lang
AC_LINK_FILES(java/lang/${PLATFORM}Process.java, java/lang/ConcreteProcess.java)
AC_LINK_FILES(java/lang/nat${PLATFORM}Process.cc, java/lang/natConcreteProcess.cc)

case "${host}" in
    *mingw*)
      SYSTEMSPEC="-lgdi32 -lwsock32 -lws2_32"
    ;;
    *)
      SYSTEMSPEC=
    ;;
esac
AC_SUBST(SYSTEMSPEC)

LIBGCJTESTSPEC="-L`${PWDCMD-pwd}`/.libs -rpath `${PWDCMD-pwd}`/.libs"
AC_SUBST(LIBGCJTESTSPEC)

AC_ARG_WITH(system-zlib,
[  --with-system-zlib      use installed libz])
ZLIBSPEC=
AC_SUBST(ZLIBSPEC)
ZLIBTESTSPEC=
AC_SUBST(ZLIBTESTSPEC)

dnl FIXME: this should be _libs on some hosts.
libsubdir=.libs

dnl Allow the GC to be disabled.  Can be useful when debugging.
AC_MSG_CHECKING([for garbage collector to use])
AC_ARG_ENABLE(java-gc,
changequote(<<,>>)dnl
<<  --enable-java-gc=TYPE   choose garbage collector [boehm]>>,
changequote([,])
  GC=$enableval,
  GC=boehm)
GCLIBS=
GCINCS=
GCDEPS=
GCOBJS=
GCSPEC=
JC1GCSPEC=
GCTESTSPEC=
case "$GC" in
 boehm)
    AC_MSG_RESULT(boehm)
    GCLIBS=../boehm-gc/libgcjgc_convenience.la
    GCINCS='-I$(top_srcdir)/../boehm-gc/include'
    JC1GCSPEC='-fuse-boehm-gc'
    GCTESTSPEC="-L`${PWDCMD-pwd}`/../boehm-gc/.libs -rpath `${PWDCMD-pwd}`/../boehm-gc/.libs"

    dnl We also want to pick up some cpp flags required when including
    dnl boehm-config.h.  Yuck.
    GCINCS="$GCINCS `cat ../boehm-gc/boehm-cflags`"
    GCOBJS=boehm.lo
    GCHDR=boehm-gc.h
    dnl The POSIX thread support needs to know this.
    AC_DEFINE(HAVE_BOEHM_GC)
    ;;
 no)
    AC_MSG_RESULT(none)
    GCOBJS=nogc.lo
    GCHDR=no-gc.h
    ;;
 *)
    AC_MSG_ERROR(unrecognized collector \"$GC\")
    ;;
esac
AC_SUBST(GCLIBS)
AC_SUBST(GCINCS)
AC_SUBST(GCDEPS)
AC_SUBST(GCOBJS)
AC_SUBST(GCSPEC)
AC_SUBST(JC1GCSPEC)
AC_SUBST(GCTESTSPEC)
AC_LINK_FILES(include/$GCHDR, include/java-gc.h)


AC_MSG_CHECKING([for thread model used by GCC])
THREADS=`$CC -v 2>&1 | sed -n 's/^Thread model: //p'`
AC_MSG_RESULT([$THREADS])

case "$THREADS" in
 no | none | single)
    THREADS=none
    ;;
 posix | pthreads)
    THREADS=posix
    case "$host" in
     *-*-linux*)
        AC_DEFINE(LINUX_THREADS)
        ;;
    esac
    ;;