dnl Process this file with autoconf to produce a configure script.
dnl
dnl  $Id$

AC_PREREQ(2.13)
AC_INIT(README)
RTEMS_TOP(.)

dnl Checks for programs.
AC_PROG_MAKE_SET

AC_ARG_WITH(cross-host,[  --with-cross-host=HOST      host (cygnus)], \
host=$withval)

RTEMS_CANONICAL_TARGET_CPU
RTEMS_ENABLE_MULTIPROCESSING
RTEMS_ENABLE_POSIX
RTEMS_ENABLE_NETWORKING
RTEMS_ENABLE_RDBG
RTEMS_ENABLE_INLINES
RTEMS_ENABLE_CXX
RTEMS_ENABLE_GCC28
RTEMS_ENABLE_LIBCDIR
RTEMS_ENABLE_BARE

RTEMS_PREFIX=${target_cpu}-${target_vendor}

dnl BEGIN configure.host.in

AC_PATH_PROG(CAT,cat)
AC_PATH_PROG(RM,rm)
AC_PATH_PROG(CP,cp)
AC_PATH_PROG(MV,mv)
AC_PATH_PROG(LN,ln)
AC_PROG_LN_S
AC_PATH_PROG(CHMOD,chmod)
AC_PATH_PROG(SORT,sort)
AC_PROG_INSTALL
RTEMS_PATH_PERL

AC_PATH_PROG(TOUCH,touch)
AC_PATH_PROG(CMP,cmp)

AC_PATH_PROG(SED,sed)
AC_PATH_PROGS(M4,gm4 m4)

RTEMS_PATH_KSH

dnl BEGIN configure.target.in

dnl echo "TARGET"
dnl echo "    cpu    --> $target_cpu"
dnl echo "    os     --> $target_os"
dnl echo "    vendor --> $target_vendor"

dnl canonicalize target name
dnl NOTE: Most rtems targets do not fullfil autoconf 
dnl targets naming conventions "processor-vendor-os"
dnl Therefore autoconf's AC_CANONICAL_TARGET will fail for them
dnl and we have to fix it for rtems ourselves 
dnl 
dnl The original plan was to do CPU-BSP-rtems or CPU-rtems to
dnl imply all BSPs.  Eventually we would like to build a collection
dnl of CPU model specific RTEMS libraries which in conjunction with
dnl a BSP library would be used to link an application.

# RTEMS_CANONICAL_TARGET_CPU
RTEMS_CHECK_CPU
RTEMS_CANONICAL_HOST

changequote(,)dnl
case "${target}" in
  i[3456]86-go32-rtems*)
    rtems_bsp="go32 go32_p5"
    skip_startfiles="yes"
    ;;
  *)
    ;;
esac
changequote([,])dnl

# Override the set of BSPs to be built.
AC_ARG_ENABLE(rtemsbsp, \
  [  --enable-rtemsbsp=bsp1 bsp2 ..   BSPs to include in build], \
      rtems_bsp=$enableval \
)

RTEMS_TOOL_PREFIX

dnl check target cc
RTEMS_PROG_CC
dnl check if the compiler supports --specs
RTEMS_GCC_SPECS
dnl check if the target compiler may use --pipe
RTEMS_GCC_PIPE

dnl check if the compiler supports --specs if gcc28 is requested
if test "$RTEMS_USE_GCC272" != "yes" ; then
  if test "$rtems_cv_gcc_specs" = "no"; then
    AC_MSG_WARN([*** disabling --enable-gcc28])
     RTEMS_USE_GCC272=yes
  fi
fi
test "$rtems_cv_gcc_pipe" = "yes" && CC_FOR_TARGET="$CC_FOR_TARGET --pipe"

dnl check for g++
if test "$RTEMS_HAS_CPLUSPLUS" = "yes"; then
  RTEMS_PROG_CXX
  if test "$rtems_cv_prog_cc_cross" != "$rtems_cv_prog_cxx_cross"; then
    AC_MSG_ERROR([***]
     [Inconsistency in compiler configuration:]
     [Target C compiler and Target C++ compiler]
     [must both either be cross compilers or native compilers]
     [Hint: If building a posix bsp: LD_LIBRARY_PATH?] )
  fi
else
  CXX_FOR_TARGET="no"
fi

RTEMS_CANONICALIZE_TOOLS

dnl if this is an i386, does gas have good code16 support?
RTEMS_I386_GAS_CODE16

dnl check host cc
AC_PROG_CC
dnl check for .exe (Cygwin)
AC_EXEEXT

dnl FIXME: HACK for egcs/cygwin mixing '\\' and '/' in gcc -print-*
case $host_os in
*cygwin32*)	GCCSED="| sed 's%\\\\%/%g'" ;;
*) ;;
esac
AC_SUBST(GCCSED)

dnl FIXME: This is a kludge
dnl Set flags to settings all gcc variants are assumed to accept.
if test "$ac_cv_prog_gcc" = "yes"; then
dnl Add -Wall if using gcc as host compiler
  CC_CFLAGS_DEFAULT=-Wall
dnl Add -pg to profile flags, unless specified in the environment
  CC_CFLAGS_PROFILE_V=${CC_CFLAGS_PROFILE_V-"-pg"}
dnl propagate cflags to ldflags, unless specified in the environment
  CC_LDFLAGS_PROFILE_V=${CC_LDFLAGS_PROFILE_V-$CC_CFLAGS_PROFILE_V}
fi

dnl Add -g if the host compiler accepts -g, assume -g means debugging
test "$ac_cv_prog_cc_g" = "yes" && CC_CFLAGS_DEBUG_V=${CC_CFLAGS_DEBUG_V-"-g"}

dnl check for SysV IPC used by simulators
if test "$RTEMS_CPU" = "unix" ; then
  RTEMS_SYSV_SEM
  if test "$rtems_cv_sysv_sem" != "yes" ; then
    AC_MSG_ERROR([System V semaphores don't work, required by simulator])
  fi
  RTEMS_SYSV_SHM
  if test "$rtems_cv_sysv_shm" != "yes" ; then
    AC_MSG_ERROR([System V shared memory doesn't work, required by simulator])
  fi
  RTEMS_SYSV_MSG
  if test "$rtems_cv_sysv_msg" != "yes" ; then
    AC_MSG_ERROR([System V messages don't work, required by simulator])
  fi
fi

# Collect config subdirs for exec/score/tools
t="c/src/exec/score/tools"
scoretools_cfgdirs="$t/generic"
if test -d $srcdir/$t/$RTEMS_CPU; then
  scoretools_cfgdirs="$scoretools_cfgdirs $t/$RTEMS_CPU"
fi

# find all the Executive Makefiles
RTEMS_CHECK_MAKEFILE(c/src/exec/rtems)
RTEMS_CHECK_MAKEFILE(c/src/exec/sapi)
RTEMS_CHECK_MAKEFILE(c/src/exec/score/cpu/$RTEMS_CPU)

if test "$RTEMS_HAS_POSIX_API" = "yes"; then
  RTEMS_CHECK_MAKEFILE(c/src/exec/posix)
  makefiles="$makefiles c/src/exec/wrapup/posix/Makefile"
fi

# find all the Makefiles for the BSPs
if test -d "$srcdir/c/src/lib/libbsp/$RTEMS_CPU"; then
  makefiles="$makefiles c/src/lib/libbsp/$RTEMS_CPU/Makefile"

  if test -z "$rtems_bsp"; then
    AC_MSG_CHECKING([for bsps])
    files=`ls $srcdir/c/src/lib/libbsp/$RTEMS_CPU`
    for file in $files; do
      case $file in
        shared*);;
        Makefile*);;
        READ*);;
        CVS*);;
        pxfl*);;
        go32*);;       # so the i386 port can pick up the other Makefiles
        # Now account for BSPs with build variants
        gen68360)      rtems_bsp="$rtems_bsp gen68360 gen68360_040";;
        p4000)         rtems_bsp="$rtems_bsp p4600 p4650";;
        mvme162)       rtems_bsp="$rtems_bsp mvme162 mvme162lx";;
        *) rtems_bsp="$rtems_bsp $file";;
      esac;
    done

    makefiles="$makefiles c/src/lib/libbsp/bare/Makefile"

    AC_MSG_RESULT([$rtems_bsp done])
  fi

  # collect makefiles for each bsp
  for i in $rtems_bsp; do
    # make sure there is a make/custom file for the bsp
    if test ! -r "$srcdir/make/custom/${i}.cfg"; then
      AC_MSG_ERROR([no make/custom/${i}.cfg file for BSP $i])
    fi
 
    # account for "aliased" bsps which share source code
    case $i in 
      mvme162lx)    bspdir=mvme162  ;;  # mvme162 board variant
      gen68360_040) bspdir=gen68360 ;;  # 68360 in companion mode
      go32_p5)      bspdir=go32     ;;  # go32 on Pentium class CPU
      p4600)        bspdir=p4000    ;;  # p4000 board with IDT 4600
      p4650)        bspdir=p4000    ;;  # p4000 board with IDT 4650
      *)            bspdir=$i;;
    esac

    # Is there code where there should be for this BSP?
    # The bare bsp is a special case as it is not under the RTEMS_CPU path
    case $i in
      bare)
        bspcpudir=
        if test "X${BARE_CPU_CFLAGS}" = "X" ; then
          AC_MSG_ERROR([--enable-bare-cpu-cflags not specified for bare bsp])
        fi
        if test "X${BARE_CPU_MODEL}" = "X" ; then
          AC_MSG_ERROR([--enable-bare-cpu-model not specified for bare bsp])
        fi
        ;;
      *)
        bspcpudir=$RTEMS_CPU/
        ;;
    esac
     
    if test -d "$srcdir/c/src/lib/libbsp/$bspcpudir$bspdir"; then
      RTEMS_BSP_LIST="$RTEMS_BSP_LIST $i"
      # make sure the Makefiles in a bsp directory are only done once
      echo $bspdirs | grep $bspdir >/dev/null 2>&1
      if test $? -ne 0 ; then
        bspdirs="$bspdirs $bspdir"
        RTEMS_CHECK_MAKEFILE(c/src/lib/libbsp/$bspcpudir$bspdir)
        RTEMS_CHECK_MAKEFILE(c/src/lib/libbsp/${bspcpudir}shared)

        # HACK: sed out bsp-tools from makefiles
        t="c/src/lib/libbsp/$bspcpudir$bspdir/tools"
        if test -d "$srcdir/$t"; then
          bsptools_cfgdirs="$bsptools_cfgdirs $t"
          makefiles=`echo "$makefiles" | sed -e "s%$t/Makefile%%g"`
        fi
      fi
    else
      AC_MSG_ERROR([unable to find libbsp directory ($bspdir) for  $i])
    fi
  done
fi

# find all the CPU dependent library Makefiles
RTEMS_CHECK_MAKEFILE(c/src/lib/libcpu/$RTEMS_CPU)

dnl Workaround for go32
if test "$skip_startfiles" != "yes"; then
  RTEMS_CHECK_MAKEFILE(c/src/lib/start/$RTEMS_CPU)
fi

dnl END configure.target.in

# If RTEMS macros are enabled, then use them.  Otherwise, use inlines.
if test "$RTEMS_USE_MACROS" = "yes"; then
  inline_dir=macros
  if test "$RTEMS_HAS_POSIX_API" = "yes"; then
    # The problem is that there is currently no code in posix/macros :)
    AC_MSG_ERROR(Macros are not implemented for the POSIX API)
  fi
else
  inline_dir=inline
fi

# If the TCP/IP stack is enabled, then find all TCP/IP Makefiles
AC_MSG_CHECKING([if networking is enabled? ])
AC_MSG_RESULT($RTEMS_HAS_NETWORKING)
if test "$RTEMS_HAS_NETWORKING" = "yes"; then
  RTEMS_CHECK_MAKEFILE(c/src/lib/libnetworking)
  RTEMS_CHECK_MAKEFILE(c/src/lib/librpc)
  if test "$RTEMS_HAS_RDBG" = "yes"; then
    AC_MSG_CHECKING([whether cpu supports rdbg? ])
    test ! -d "$srcdir/c/src/lib/librdbg/$RTEMS_CPU" && RTEMS_HAS_RDBG="no" ;
    AC_MSG_RESULT($RTEMS_HAS_RDBG)
    if test "$RTEMS_HAS_RDBG" = "yes"; then
      AC_PATH_PROG(RPCGEN,rpcgen)
      test -z "$RPCGEN" && RTEMS_HAS_RDBG="no"
    fi
    if test "$RTEMS_HAS_RDBG" = "yes"; then
      AC_PROG_AWK
      test -z "$AWK" && RTEMS_HAS_RDBG="no"
    fi
    if test "$RTEMS_HAS_RDBG" = "yes"; then
      RTEMS_CHECK_MAKEFILE(c/src/lib/librdbg)
    else
      AC_MSG_WARN([*** warning disabling --enable-rdbg])
    fi
  fi
fi

# If the C++ support is enabled, then include the Makefiles
if test "$RTEMS_HAS_CPLUSPLUS" = "yes"; then
  makefiles="$makefiles c/src/lib/librtems++/Makefile"
fi

RTEMS_ENABLE_TESTS

# always build the test tools
testtools_cfgdirs="c/src/tests/tools/generic"
if test "$tests_enabled" = "yes"; then
   RTEMS_CHECK_MAKEFILE(c/src/tests/libtests)
   RTEMS_CHECK_MAKEFILE(c/src/tests/sptests)
   RTEMS_CHECK_MAKEFILE(c/src/tests/tmtests)
   if test "$RTEMS_HAS_MULTIPROCESSING" = "yes"; then
       RTEMS_CHECK_MAKEFILE(c/src/tests/mptests)
   fi
   if test "$RTEMS_HAS_POSIX_API" = "yes"; then
     RTEMS_CHECK_MAKEFILE(c/src/tests/psxtests)
   fi
   if test -d "$srcdir/c/src/tests/tools/$RTEMS_CPU"; then
     testtools_cfgdirs="$testtools_cfgdirs c/src/tests/tools/$RTEMS_CPU"
   fi
fi 

# If the HWAPI is enabled, the find the HWAPI Makefiles
RTEMS_ENABLE_HWAPI
if test "$RTEMS_HAS_HWAPI" = "yes"; then
  AC_MSG_CHECKING(whether libwapi is present)
  if test -f ${srcdir}/c/src/lib/libhwapi/Makefile.in ; then
    AC_MSG_RESULT(yes)
    makefiles="$makefiles c/src/lib/libhwapi/Makefile"
    RTEMS_CHECK_MAKEFILE(c/src/lib/libhwapi/analog)
    RTEMS_CHECK_MAKEFILE(c/src/lib/libhwapi/discrete)
    RTEMS_CHECK_MAKEFILE(c/src/lib/libhwapi/drivers)
    RTEMS_CHECK_MAKEFILE(c/src/lib/libhwapi/non_volatile_memory)
    RTEMS_CHECK_MAKEFILE(c/src/lib/libhwapi/serial)
    RTEMS_CHECK_MAKEFILE(c/src/lib/libhwapi/support)
    RTEMS_CHECK_MAKEFILE(c/src/lib/libhwapi/wrapup)
  else
    AC_MSG_ERROR(No source code found for the HWAPI)
  fi
fi

AC_SUBST(rtems_cv_prog_cc_cross)
AC_SUBST(RTEMS_BSP_LIST)
AC_SUBST(RTEMS_HAS_CPLUSPLUS)
AC_SUBST(RTEMS_USE_GCC272)
AC_SUBST(BARE_CPU_CFLAGS)
AC_SUBST(BARE_CPU_MODEL)
AC_SUBST(program_prefix)
AC_SUBST(CC_CFLAGS_DEFAULT)
AC_SUBST(CC_CFLAGS_DEBUG_V)
AC_SUBST(CC_CFLAGS_PROFILE_V)
AC_SUBST(CC_LDFLAGS_PROFILE_V)

# pick up all the Makefiles in required parts of the tree
RTEMS_CHECK_MAKEFILE(make)
RTEMS_CHECK_MAKEFILE(c/src/lib/libchip)
RTEMS_CHECK_MAKEFILE(c/src/lib/libmisc)
RTEMS_CHECK_MAKEFILE(c/src/tests/samples)

AC_CONFIG_SUBDIRS(c/build-tools)
AC_CONFIG_SUBDIRS(c/update-tools)
AC_CONFIG_SUBDIRS($scoretools_cfgdirs)
AC_CONFIG_SUBDIRS($bsptools_cfgdirs)
AC_CONFIG_SUBDIRS($testtools_cfgdirs)

# FIXME: libhwapi needs a separate configure.in in future ;-
# AC_CONFIG_SUBDIRS(c/src/lib/libhwapi)

# try not to explicitly list a Makefile here 
AC_OUTPUT( 
Makefile
make/host.cfg
make/target.cfg
make/Templates/Makefile.inc
make/compilers/gcc.cfg
c/Makefile
c/src/Makefile
c/src/exec/Makefile
c/src/exec/score/Makefile
c/src/exec/score/cpu/Makefile
c/src/exec/score/include/Makefile
c/src/exec/score/include/rtems/Makefile
c/src/exec/score/include/rtems/wrap/Makefile
c/src/exec/score/include/rtems/score/Makefile
c/src/exec/score/${inline_dir}/Makefile
c/src/exec/score/${inline_dir}/rtems/Makefile
c/src/exec/score/${inline_dir}/rtems/score/Makefile
c/src/exec/score/src/Makefile
c/src/exec/score/tools/Makefile
c/src/exec/wrapup/Makefile
c/src/exec/wrapup/rtems/Makefile
c/src/lib/Makefile
c/src/lib/include/Makefile
c/src/lib/libbsp/Makefile
c/src/lib/libbsp/shmdr/Makefile
c/src/lib/libc/Makefile
c/src/lib/libcpu/Makefile
c/src/lib/start/Makefile
c/src/lib/wrapup/Makefile
c/src/tests/Makefile
c/src/tests/support/Makefile
c/src/tests/support/include/Makefile
c/src/tests/support/stubdr/Makefile
c/src/tests/support/wrapup/Makefile
c/src/tests/tools/Makefile
$makefiles)

echo
echo target architecture: $RTEMS_CPU.
echo available BSPs: $rtems_bsp.
echo \'make all\' will build the following BSPs: $RTEMS_BSP_LIST.
echo other BSPs can be built with \'make RTEMS_BSP=\"bsp1 bsp2 ...\"\' 
echo