source: trunk/gcc/libjava/configure.in@ 2542

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