#
# Contains some unsorted druntime utility macros.
#


# DRUNTIME_WERROR
# ---------------
# Check to see if -Werror is enabled.
AC_DEFUN([DRUNTIME_WERROR],
[
  AC_ARG_ENABLE(werror, [AS_HELP_STRING([--enable-werror],
                                        [turns on -Werror @<:@default=no@:>@])])
  WERROR_FLAG=""
  if test "x$enable_werror" = "xyes"; then
      WERROR_FLAG="-Werror"
  fi
])


# DRUNTIME_CONFIGURE
# ------------------
# Substitute absolute paths for srcdir and builddir.
AC_DEFUN([DRUNTIME_CONFIGURE],
[
  # These need to be absolute paths, yet at the same time need to
  # canonicalize only relative paths, because then amd will not unmount
  # drives. Thus the use of PWDCMD: set it to 'pawd' or 'amq -w' if using amd.
  libphobos_builddir=`${PWDCMD-pwd}`
  case $srcdir in
    [\\/$]* | ?:[\\/]*) libphobos_srcdir=${srcdir} ;;
    *) libphobos_srcdir=`cd "$srcdir" && ${PWDCMD-pwd} || echo "$srcdir"` ;;
  esac
  AC_SUBST(libphobos_builddir)
  AC_SUBST(libphobos_srcdir)
])

# DRUNTIME_MULTILIB
# -----------------
# Prepare the multilib_arg variable
AC_DEFUN([DRUNTIME_MULTILIB],
[
  if test ${multilib} = yes; then
    multilib_arg="--enable-multilib"
  else
    multilib_arg=
  fi
])


# DRUNTIME_INSTALL_DIRECTORIES
# ----------------------------
# Setup various install directories for headers.
# Add the cross-host option and substitute the libphobos_toolexecdir
# libphobos_toolexeclibdir and gdc_include_dir variables.
AC_DEFUN([DRUNTIME_INSTALL_DIRECTORIES],
[
  AC_REQUIRE([AC_PROG_GDC])

  AC_MSG_CHECKING([D GCC version])
  gcc_version=`eval $get_gcc_base_ver $srcdir/../gcc/BASE-VER`
  AC_MSG_RESULT($gcc_version)
  AC_SUBST(gcc_version)

  AC_ARG_WITH([cross-host],
    AC_HELP_STRING([--with-cross-host=HOST],
                   [configuring with a cross compiler]))

  libphobos_toolexecdir=no
  libphobos_toolexeclibdir=no

  AC_MSG_CHECKING([for --enable-version-specific-runtime-libs])
  AC_ARG_ENABLE([version-specific-runtime-libs],
    AC_HELP_STRING([--enable-version-specific-runtime-libs],
		   [Specify that runtime libraries should be installed in a compiler-specific directory]),
    [case "$enableval" in
      yes) version_specific_libs=yes ;;
      no)  version_specific_libs=no ;;
      *)   AC_MSG_ERROR([Unknown argument to enable/disable version-specific libs]);;
     esac],
    [version_specific_libs=no])
  AC_MSG_RESULT($version_specific_libs)

  GCC_WITH_TOOLEXECLIBDIR

  # Version-specific runtime libs processing.
  if test $version_specific_libs = yes; then
    libphobos_toolexecdir='${libdir}/gcc/${host_alias}'
    libphobos_toolexeclibdir='${toolexecdir}/${gcc_version}$(MULTISUBDIR)'
  else
    # Calculate libphobos_toolexecdir, libphobos_toolexeclibdir
    # Install a library built with a cross compiler in tooldir, not libdir.
    if test -n "$with_cross_host" && test x"$with_cross_host" != x"no"; then
      libphobos_toolexecdir='${exec_prefix}/${host_alias}'
      case ${with_toolexeclibdir} in
	no)
	  libphobos_toolexeclibdir='${toolexecdir}/lib'
	  ;;
	*)
	  libphobos_toolexeclibdir=${with_toolexeclibdir}
	  ;;
      esac
    else
      libphobos_toolexecdir='${libdir}/gcc/${host_alias}'
      libphobos_toolexeclibdir='${libdir}'
    fi
    multi_os_directory=`$GDC -print-multi-os-directory`
    case $multi_os_directory in
      .) ;; # Avoid trailing /.
      *) libphobos_toolexeclibdir=${libphobos_toolexeclibdir}/${multi_os_directory} ;;
    esac
  fi
  AC_SUBST(libphobos_toolexecdir)
  AC_SUBST(libphobos_toolexeclibdir)

  # Default case for install directory for D sources files.
  gdc_include_dir='$(libdir)/gcc/${target_alias}/${gcc_version}/include/d'
  AC_SUBST(gdc_include_dir)
])

# DRUNTIME_SECTION_FLAGS
# ----------------------
# Check for -ffunction-sections nad -fdata-sections.
AC_DEFUN([DRUNTIME_SECTION_FLAGS],
[
  WITH_LOCAL_DRUNTIME([
    AC_LANG_PUSH([D])
    GDCFLAGS="$GDCFLAGS -g -Werror -ffunction-sections -fdata-sections"
    AC_TRY_COMPILE([int foo; void bar() { }],[return 0;],
		   [ac_fdsections=yes], [ac_fdsections=no])
    if test "x$ac_fdsections" = "xyes"; then
      SECTION_FLAGS='-ffunction-sections -fdata-sections'
    fi
    AC_MSG_RESULT($ac_fdsections)
    AC_LANG_POP([D])
  ], [-nophoboslib])
  AC_SUBST(SECTION_FLAGS)
])