# Process this file with autoconf to produce a configure script.
AC_INIT()

CMAKE_CONFIG_DIR=`pwd`
AC_SUBST(CMAKE_CONFIG_DIR)

#
# check for some programs we use
#
AC_PROG_CC
AC_PROG_CXX
AC_PROG_RANLIB
AC_PROG_INSTALL

# check for X11 support
AC_PATH_XTRA
CMAKE_HAS_X=0
if test "$no_x"a = a; then
CMAKE_HAS_X=1
fi
AC_SUBST(CMAKE_HAS_X)

# get byte swapping info
AC_C_BIGENDIAN
if test $ac_cv_c_bigendian = yes; then
  CMAKE_WORDS_BIGENDIAN=1
fi
AC_SUBST(CMAKE_WORDS_BIGENDIAN)


# some stuff Tcl uses
#
AC_CHECK_HEADER(limits.h, HAVE_LIMITS_H=-DHAVE_LIMITS_H,HAVE_LIMITS_H="")
AC_SUBST(CMAKE_HAVE_LIMITS_H)
AC_HAVE_HEADERS(unistd.h, HAVE_UNISTD_H=-DHAVE_UNISTD_H,HAVE_UNISTD_H="")
AC_SUBST(CMAKE_HAVE_UNISTD_H)

# Step 1: set the variable "system" to hold the name and version number
# for the system.  This can usually be done via the "uname" command, but
# there are a few systems, like Next, where this doesn't work.

AC_MSG_CHECKING([system version (for dynamic loading)])
if test -f /usr/lib/NextStep/software_version; then
  system=NEXTSTEP-`awk '/3/,/3/' /usr/lib/NextStep/software_version`
else
    system=`uname -s`-`uname -r`
    if test "$?" -ne 0 ; then
	AC_MSG_RESULT([unknown (can't find uname command)])
	system=unknown
    else
	# Special check for weird MP-RAS system (uname returns weird
	# results, and the version is kept in special file).
    
	if test -r /etc/.relid -a "X`uname -n`" = "X`uname -s`" ; then
	    system=MP-RAS-`awk '{print $3}' /etc/.relid'`
	fi
	AC_MSG_RESULT($system)
    fi
fi

#
# use shared libs
#


CMAKE_shared_ok="yes"
# the following is an excerpt from the tcl7.5b2 configure.in
#--------------------------------------------------------------------
#	The statements below define a collection of symbols related to
#	dynamic loading and shared libraries:
#
#	CMAKE_SHLIB_CFLAGS -	Flags to pass to cc when compiling the components
#			of a shared library (may request position-independent
#			code, among other things).
#	CMAKE_SHLIB_LD_LIBS -	Dependent libraries for the linker to scan when
#			creating shared libraries.  This symbol typically
#			goes at the end of the "ld" commands that build
#			shared libraries. The value of the symbol if
#			"${LIBS}" if all of the dependent libraries should
#			be specified when creating a shared library.  If
#			dependent libraries should not be specified (as on
#			SunOS 4.x, where they cause the link to fail, or in
#			general if Tcl and Tk aren't themselves shared
#			libraries), then this symbol has an empty string
#			as its value.
#	CMAKE_SHLIB_SUFFIX -	Suffix to use for the name of the shared library.  An
#			empty string means we don't know how to use shared
#			libraries on this platform.
#	CMAKE_SHLIB_BUILD_FLAGS -
#                       Flags to use when building a shared library.	
#	CMAKE_SHLIB_LINK_FLAGS -	
#                       Flags to pass to the compiler when linking object
#			files into an executable application binary such
#			as tclsh.
#--------------------------------------------------------------------


# Step 2: check for existence of -ldl library.  This is needed because
# Linux can use either -ldl or -ldld for dynamic loading.

AC_CHECK_LIB(dl, dlopen, have_dl=yes, have_dl=no)

# Step 4: set configuration options based on system name and version.

fullSrcDir=`cd $srcdir; pwd`
AC_SUBST(fullSrcDir)
case $system in
    AIX-*)
	# AIX: can't link shared library extensions unless Tcl and Tk are
	# also shared libraries.
	CMAKE_SHLIB_CFLAGS=""
	CMAKE_SHLIB_LD_LIBS='${LIBS}'
	CMAKE_SHLIB_SUFFIX="..o"
	CMAKE_DL_LIBS=""
        AC_CHECK_LIB(ld,printf, CMAKE_DL_LIBS="-lld")
	CMAKE_SHLIB_LINK_FLAGS=""
	;;
    HP-UX-*.08.*|HP-UX-*.09.*|HP-UX-*.10.*)
	CMAKE_SHLIB_CFLAGS="+z"
	CMAKE_SHLIB_LD_LIBS=""
	CMAKE_SHLIB_SUFFIX=".sl"
	CMAKE_DL_LIBS="-ldld"
	CMAKE_SHLIB_BUILD_FLAGS='+Z -Wl,-E -Wl,-b'
	CMAKE_SHLIB_LINK_FLAGS='-Wl,+s -Wl,+b,${LIB_RUNTIME_DIR}'
        if test "$CC" = "gcc" -o `$CC -v 2>&1 | grep -c gcc` != "0" ; then
  	  CMAKE_SHLIB_BUILD_FLAGS='-shared -Wl,-E -Wl,-b'
	  CMAKE_SHLIB_LINK_FLAGS='-Wl,+s -Wl,+b,${LIB_RUNTIME_DIR}'
        fi
	;;
    IRIX-5.*)
	CMAKE_SHLIB_CFLAGS=""
	CMAKE_SHLIB_LD_LIBS=""
	CMAKE_SHLIB_SUFFIX=".so"
	CMAKE_DL_LIBS=""
	CMAKE_SHLIB_BUILD_FLAGS="-shared -rdata_shared"
	;;
    IRIX-6* | IRIX64-6* | IRIX-64-6*)
	CMAKE_SHLIB_CFLAGS=""
	CMAKE_SHLIB_LD_LIBS=""
	CMAKE_SHLIB_SUFFIX=".so"
	CMAKE_DL_LIBS=""
	CMAKE_SHLIB_BUILD_FLAGS="-shared -rdata_shared"
	;;
    Linux*)
	CMAKE_SHLIB_CFLAGS="-fPIC"
	CMAKE_SHLIB_LD_LIBS=""
	CMAKE_SHLIB_SUFFIX=".so"
	CMAKE_SHLIB_BUILD_FLAGS="-shared"
	if test "$have_dl" = yes; then
	    CMAKE_DL_LIBS="-ldl"
	    CMAKE_SHLIB_LINK_FLAGS="-rdynamic"
	else
	    AC_CHECK_HEADER(dld.h, [
		CMAKE_DL_LIBS="-ldld"
		CMAKE_SHLIB_LINK_FLAGS=""])
	fi
	;;
    CYGWIN_NT*)
        CMAKE_SHLIB_CFLAGS=""
        CMAKE_DL_LIBS="-lgdi32" 
        CMAKE_SHLIB_SUFFIX=".dll"
        CMAKE_SHLIB_LINK_FLAGS="-shared"
        ;;
    MP-RAS-02*)
	CMAKE_SHLIB_CFLAGS="-K PIC"
	CMAKE_SHLIB_LD_LIBS=""
	CMAKE_SHLIB_SUFFIX=".so"
	CMAKE_DL_LIBS="-ldl"
	CMAKE_SHLIB_LINK_FLAGS=""
	;;
    MP-RAS-*)
	CMAKE_SHLIB_CFLAGS="-K PIC"
	CMAKE_SHLIB_LD_LIBS=""
	CMAKE_SHLIB_SUFFIX=".so"
	CMAKE_DL_LIBS="-ldl"
	CMAKE_SHLIB_LINK_FLAGS="-Wl,-Bexport"
	;;
    NetBSD-*|FreeBSD-*)
	# Not available on all versions:  check for include file.
	if test -f /usr/include/dlfcn.h; then
	    CMAKE_SHLIB_CFLAGS="-fpic"
	    CMAKE_SHLIB_LD_LIBS=""
	    CMAKE_SHLIB_SUFFIX=".so"
	    CMAKE_DL_LIBS=""
	    CMAKE_SHLIB_LINK_FLAGS="-shared"
	else
	    CMAKE_SHLIB_CFLAGS=""
	    CMAKE_SHLIB_LD_LIBS=""
	    CMAKE_SHLIB_SUFFIX="..o"
	    CMAKE_DL_LIBS=""
	    CMAKE_SHLIB_LINK_FLAGS=""
	fi
	;;
    NEXTSTEP-*)
	CMAKE_SHLIB_CFLAGS=""
	CMAKE_SHLIB_LD_LIBS=""
	CMAKE_SHLIB_SUFFIX=".so"
	CMAKE_DL_LIBS=""
	CMAKE_SHLIB_LINK_FLAGS=""
	;;
    OSF1-1.[012])
	# OSF/1 1.[012] from OSF, and derivatives, including Paragon OSF/1
	CMAKE_SHLIB_CFLAGS=""
	# Hack: make package name same as library name
	CMAKE_SHLIB_LD_LIBS=""
	CMAKE_SHLIB_SUFFIX=".so"
	CMAKE_DL_LIBS=""
	CMAKE_SHLIB_LINK_FLAGS=""
	;;
    OSF1-1.*)
	# OSF/1 1.3 from OSF using ELF, and derivatives, including AD2
	CMAKE_SHLIB_CFLAGS="-fpic"
	CMAKE_SHLIB_LD_LIBS=""
	CMAKE_SHLIB_SUFFIX=".so"
	CMAKE_DL_LIBS=""
	CMAKE_SHLIB_LINK_FLAGS=""
	;;
    OSF1-V*)
        # Digital OSF/1
	CMAKE_SHLIB_CFLAGS=""
	CMAKE_SHLIB_LD_LIBS=""
	CMAKE_SHLIB_SUFFIX=".so"
	CMAKE_DL_LIBS=""
	CMAKE_SHLIB_BUILD_FLAGS='-shared -Wl,-expect_unresolved,"*"'
	CMAKE_SHLIB_LINK_FLAGS='-Wl,-rpath,${LIB_RUNTIME_DIR}'
	;;
    RISCos-*)
	CMAKE_SHLIB_CFLAGS="-G 0"
	CMAKE_SHLIB_LD_LIBS=""
	CMAKE_SHLIB_SUFFIX="..o"
	CMAKE_DL_LIBS=""
	CMAKE_SHLIB_LINK_FLAGS="-Wl,-D,08000000"
	;;
    SCO_SV-3.2*)
        # Note, dlopen is available only on SCO 3.2.5 and greater.  However,
        # this test works, since "uname -s" was non-standard in 3.2.4 and
        # below.
	CMAKE_SHLIB_CFLAGS="-Kpic -belf"
	CMAKE_SHLIB_LD_LIBS=""
	CMAKE_SHLIB_SUFFIX=".so"
	CMAKE_DL_LIBS=""
	CMAKE_SHLIB_LINK_FLAGS="-belf -Wl,-Bexport"
	;;
     SINIX*5.4*)
	CMAKE_SHLIB_CFLAGS="-K PIC"
	CMAKE_SHLIB_LD_LIBS=""
	CMAKE_SHLIB_SUFFIX=".so"
	CMAKE_DL_LIBS="-ldl"
	CMAKE_SHLIB_LINK_FLAGS=""
	;;
    SunOS-4*)
	CMAKE_SHLIB_CFLAGS="-PIC"
	CMAKE_SHLIB_LD_LIBS=""
	CMAKE_SHLIB_SUFFIX=".so"
	CMAKE_DL_LIBS="-ldl"
	CMAKE_SHLIB_BUILD_FLAGS='-shared -Wl,-r -nostdlib'
	CMAKE_SHLIB_LINK_FLAGS='-Wl,-L${LIB_RUNTIME_DIR}'
	;;
    SunOS-5*)
	CMAKE_SHLIB_CFLAGS="-KPIC"
	CMAKE_SHLIB_LD_LIBS='${LIBS}'
	CMAKE_SHLIB_SUFFIX=".so"
	CMAKE_DL_LIBS="-ldl"
	CMAKE_SHLIB_BUILD_FLAGS='-G'
	CMAKE_SHLIB_LINK_FLAGS='-R ${LIB_RUNTIME_DIR}'
        if test "$CC" = "gcc" -o `$CC -v 2>&1 | grep -c gcc` != "0" ; then
	  CMAKE_SHLIB_BUILD_FLAGS='-Wl,-G'
	  CMAKE_SHLIB_LINK_FLAGS='-Wl,-R,${LIB_RUNTIME_DIR}'
        fi
	;;
    ULTRIX-4.*)
	CMAKE_SHLIB_CFLAGS="-G 0"
	CMAKE_SHLIB_SUFFIX="..o"
	CMAKE_SHLIB_LD_LIBS=""
	CMAKE_DL_LIBS=""
	CMAKE_SHLIB_LINK_FLAGS="-Wl,-D,08000000"
	;;
    UNIX_SV*)
	CMAKE_SHLIB_CFLAGS="-K PIC"
	CMAKE_SHLIB_LD_LIBS=""
	CMAKE_SHLIB_SUFFIX=".so"
	CMAKE_DL_LIBS="-ldl"
	CMAKE_SHLIB_LINK_FLAGS="-Wl,-Bexport"
	;;
esac
export CMAKE_SHLIB_SUFFIX

# If we're running gcc, then change the C flags for compiling shared
# libraries to the right flags for gcc, instead of those for the
# standard manufacturer compiler.
if test "$CC" = "gcc" -o `$CC -v 2>&1 | grep -c gcc` != "0" ; then
  CMAKE_SHLIB_CFLAGS="-fPIC"
fi
# if running on cygwin remove -fPIC flag
case $system in 
  CYGWIN_NT*)
    CMAKE_SHLIB_CFLAGS=""
    ;;
esac

CMAKE_SHLIB_CFLAGS="${SHLIB_CFLAGS}"
CMAKE_LD_SEARCH_FLAGS="${LD_SEARCH_FLAGS}"


AC_SUBST(CMAKE_SHLIB_LINK_FLAGS)
AC_SUBST(CMAKE_SHLIB_BUILD_FLAGS)
AC_SUBST(CMAKE_SHLIB_CFLAGS)
AC_SUBST(CMAKE_LIB_EXT)
AC_SUBST(CMAKE_DL_LIBS)
AC_SUBST(CMAKE_SHLIB_LD_LIBS)
AC_SUBST(CMAKE_SHLIB_SUFFIX)


##########################
##			##
## Check thread support ##
##			##
##########################
# initialize thread vars
CMAKE_THREAD_LIBS=""
use_sproc=no
CMAKE_USE_SPROC=0
CMAKE_USE_PTHREADS=0
CMAKE_HP_PTHREADS=0

##########################
##                      ##
##      sproc           ##
##                      ##
##########################
# check for sproc
force_sproc=no
AC_ARG_WITH(sproc,
         [  --with-sproc           use sproc instead of pthreads if possible],
         if test "$withval" = yes; then
         force_sproc=yes
         fi,)



AC_CHECK_HEADERS(sys/prctl.h, [use_sproc=yes])
if test "$use_sproc" = "yes"; then
case $system in
    Linux* | IRIX64-6.5 | IRIX-6.5) 
        if test "$force_sproc" = "yes"; then
           CMAKE_USE_SPROC=1
        else
	  use_sproc=no
    	fi
	;;
    IRIX*)
	CMAKE_USE_SPROC=1
	;;
esac
fi
use_pthreads=no
AC_CHECK_HEADERS(pthread.h, [use_pthreads=yes])
if test "$use_pthreads" = "yes"; then
  if test "$use_sproc" = "no"; then
    AC_CHECK_LIB(pthreads, pthread_create, CMAKE_THREAD_LIBS="-lpthreads")
    AC_CHECK_LIB(pthread, pthread_create, CMAKE_THREAD_LIBS="-lpthread")
# Work around Solaris 5.6 and 5.7 bug:
    if test "`uname -s -r`" = "SunOS 5.6"; then
      AC_CHECK_LIB(thread, thr_create, CMAKE_THREAD_LIBS="$CMAKE_THREAD_LIBS -lthread")
    fi
    if test "`uname -s -r`" = "SunOS 5.7"; then
      AC_CHECK_LIB(thread, thr_create, CMAKE_THREAD_LIBS="$CMAKE_THREAD_LIBS -lthread")
    fi
	CMAKE_USE_PTHREADS=1
  fi
fi

# on an HP with pthread we need to use -lcma
# on dec alphas we have had problems as well
if test "$use_pthreads" = "yes"; then
case $system in
    HP-UX-*.10.*)
	CMAKE_THREAD_LIBS="-lcma"
	CMAKE_USE_PTHREADS=1 
	CMAKE_HP_PTHREADS=1
	;;
    OSF1-V*)
	CMAKE_USE_PTHREADS=0
        CMAKE_THREAD_LIBS=""
        ;;
    FreeBSD*)
	CMAKE_USE_PTHREADS=0
	CMAKE_THREAD_LIBS=""
	;;
esac
fi


AC_SUBST(CMAKE_USE_SPROC)
AC_SUBST(CMAKE_USE_PTHREADS)
AC_SUBST(CMAKE_HP_PTHREADS)
AC_SUBST(CMAKE_THREAD_LIBS)


CMAKE_ANSI_CFLAGS=""
# on hp use -Aa for ansi
if test $ac_cv_prog_gxx = no; then
case $system in
    HP-UX-*.08.*|HP-UX-*.09.*|HP-UX-*.10.*)
        echo $ac_n "checking whether ${CC} accepts -Aa""... $ac_c" 1>&6
        echo 'void f(){}' > conftest.c
        if test -z "`${CC} -Aa -c conftest.c 2>&1`"; then
          echo "$ac_t""yes" 1>&6
          CMAKE_ANSI_CFLAGS="-Aa"
        else
          echo "$ac_t""no" 1>&6
        fi
        rm -f conftest*
	;;
esac
fi
AC_SUBST(CMAKE_ANSI_CFLAGS)

# if we are not running g++ then we might need some other flags
# to get the templates compiled correctly
CMAKE_TEMPLATE_FLAGS=""
if test $ac_cv_prog_gxx = no; then
    echo $ac_n "checking whether ${CXX} accepts -ptused -no_prelink""... $ac_c" 1>&6
  echo 'void f(){}' > conftest.cc
  if test -z "`${CXX} -ptused -no_prelink -c conftest.cc 2>&1`"; then
    echo "$ac_t""yes" 1>&6
    CMAKE_TEMPLATE_FLAGS="-ptused -no_prelink"
  else
    echo "$ac_t""no" 1>&6
  fi
  rm -f conftest*
  echo $ac_n "checking whether ${CXX} accepts -instances=semiexplicit""... $ac_c" 1>&6
  echo 'void f(){}' > conftest.cc
  if test -z "`${CXX} -instances=static -c conftest.cc 2>&1`"; then
    echo "$ac_t""yes" 1>&6
    CMAKE_TEMPLATE_FLAGS="-instances=static"
  else
    echo "$ac_t""no" 1>&6
  fi
fi
AC_SUBST(CMAKE_TEMPLATE_FLAGS)

# check no g++ compilers to see if they have the standard 
# ansi stream files (without the .h)
if test $ac_cv_prog_gxx = no; then
  AC_MSG_CHECKING( ansi standard C++ stream headers ) 
  echo "******"
  rm -rf conftest.*
  cat > conftest.cc <<!
#include <iostream>
!
  if test -z "`${CXX} -c conftest.cc 2>&1`"; then
    echo "$ac_t""yes" 1>&6
  else
    AC_DEFINE(CMAKE_NO_STD_NAMESPACE)
    echo "$ac_t""no" 1>&6
  fi
fi

# check to see if stl is in the std namespace
if test $ac_cv_prog_gxx = no; then
  echo "******"
  AC_MSG_CHECKING( ansi standard namespace support ) 
  rm -rf conftest.*
  cat > conftest.cc <<!
#include <list>
void foo() { std::list<int> l; }
!
  if test -z "`${CXX} -c conftest.cc 2>&1`"; then
    echo "$ac_t""yes" 1>&6
  else
    AC_DEFINE(CMAKE_NO_ANSI_STREAM_HEADERS)
    echo "$ac_t""no" 1>&6
  fi
fi


if test "$CC" = "gcc" -o `$CC -v 2>&1 | grep -c gcc` != "0" ; then
  SHLIB_CFLAGS="-fPIC"
fi

# find make to use to build cmake, prefer gmake
AC_PATH_PROGS(RUNMAKE, gmake make)
AC_PATH_PROGS(CMAKE_AR, ar)
AC_SUBST(CMAKE_AR)

# generate output files.
# create mkdir files just to make some of the directories

AC_OUTPUT( CMakeSystemConfig.cmake )