dnl Process this file with autoconf to produce a configure script
AC_INIT(Singular/matpol.h)
AC_PREFIX_DEFAULT(`pwd`)

dnl lllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllll
dnl Version business -- should be the same as in Singular subdir 
dnl
SINGULAR_MAJOR_VERSION=1
SINGULAR_MINOR_VERSION=1
SINGULAR_SUB_VERSION=8
VERSION_DATE="April 1998"
AC_SUBST(SINGULAR_MAJOR_VERSION)
AC_SUBST(SINGULAR_MINOR_VERSION)
AC_SUBST(SINGULAR_SUB_VERSION)

AC_CANONICAL_HOST
AC_SUBST(host)


dnl lllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllll
dnl those are needed to check for libs and headers, later on
dnl
AC_PROG_CC
AC_PROG_CPP
AC_AIX

dnl and add to -I to CPPFLAGS and and -Lto LDFLAGS, just to be sure
if test "$libdir" = '${exec_prefix}/lib'; then
  if test "x$exec_prefix" = xNONE; then
    if test "x$prefix" = xNONE; then
      LDFLAGS="-L${ac_default_prefix}/lib ${LDFLAGS}"
      ac_configure_args="$ac_configure_args --libdir=${ac_default_prefix}/lib"
    else
      LDFLAGS="-L${prefix}/lib ${LDFLAGS}"
      ac_configure_args="$ac_configure_args --libdir=${prefix}/lib"
    fi
  else
    LDFLAGS="-L${exec_prefix}/lib ${LDFLAGS}"
    ac_configure_args="$ac_configure_args --libdir=${exec_prefix}/lib"
  fi
else
  LDFLAGS="-L${libdir} ${LDFLAGS}"
fi

if test "$includedir" = '${prefix}/include'; then
  if test "x$prefix" = xNONE; then
    CPPFLAGS="-I${ac_default_prefix}/include ${CPPFLAGS}"
    ac_configure_args="$ac_configure_args --includedir=${ac_default_prefix}/include"
  else
    CPPFLAGS="-I${prefix}/include ${CPPFLAGS}"
    ac_configure_args="$ac_configure_args --includedir=${prefix}/include"
  fi
else
  CPPFLAGS="-I${includedir} ${CPPFLAGS}"
fi

dnl pass default prefix on to subdirs, if not explicitely given as an option
if test "x$prefix" = xNONE; then
  ac_configure_args="$ac_configure_args --prefix=$ac_default_prefix"
fi

AC_MSG_CHECKING(whether _AIX is defined)
AC_CACHE_VAL(ac_cv_is_aix,
AC_EGREP_CPP(yes,
[#ifdef _AIX
    yes
#endif
], ac_cv_is_aix=yes, ac_cv_is_aix=no, 1))
if test "$ac_cv_is_aix" = yes; then
  AC_MSG_RESULT(yes)
else
  AC_MSG_RESULT(no)
fi


dnl lllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllll
dnl check for various libraries and headers
dnl
AC_CHECK_LIB(m, atof)
AC_CHECK_LIB(bsd, socket)
AC_CHECK_LIB(socket, listen)
AC_CHECK_LIB(nsl, gethostbyname)
AC_CHECK_LIB(gmp, mpq_init)
AC_CHECK_LIB(smallgmp, mpz_init)
AC_CHECK_LIB(MP, IMP_PutGmpInt)
AC_CHECK_LIB(MPT, MPT_GetTree)
AC_CHECK_LIB(singcf, atof)
AC_CHECK_LIB(singfac, atof)

AC_CHECK_HEADERS(gmp.h smallgmp.h MP.h  MPT.h factory.h factor.h)

if test "$ac_cv_lib_gmp_mpq_init" = yes && \
 test "$ac_cv_header_gmp_h" = yes; then
    ac_gmp_ok=yes
fi

if test "$ac_cv_lib_smallgmp_mpz_init" = yes && \
 test "$ac_cv_header_smallgmp_h" = yes && \
 test "$ac_cv_header_gmp_h" = yes; then
    ac_smallgmp_ok=yes
fi

if test "$ac_cv_lib_MP_IMP_PutGmpInt" = yes && \
 test "$ac_cv_lib_MPT_MPT_GetTree" && \
 test "$ac_cv_header_MP_h" = yes && \
 test "$ac_cv_header_MPT_h" = yes; then
  ac_MP_ok=yes
fi

if test "$ac_cv_lib_singcf_atof" = yes && \
 test "$ac_cv_header_factory_h" = yes; then
  ac_factory_ok=yes
fi

if test "$ac_cv_lib_singfac_atof" = yes && \
 test "$ac_cv_header_factor_h" = yes; then
  ac_libfac_ok=yes
fi


  
dnl lllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllll
dnl Check whether or not to built various packages
dnl
AC_ARG_ENABLE(smallgmp, \
 [ --enable-PACKAGE        configure and build PACKAGE
  --disable-PACKAGE       do not configure and build PACKAGE
 where PACKAGE can be:
     smallgmp             minimal version of gmp written in C only])
AC_ARG_ENABLE(MP, \
 [    MP                   Multi Protocol library])
AC_ARG_ENABLE(factory, \
 [    factory              polynomial factorization library])
AC_ARG_ENABLE(libfac, \
 [    libfac               char set and modp poly factorization library])
AC_ARG_ENABLE(sgroup, \
 [    sgroup               numerical semigroup computations])
AC_ARG_ENABLE(Singular, \
 [    Singular             CAS for commutative algebra])

AC_ARG_WITH(MP,\
 [ --with-PACKAGE          use PACKAGE, provide dependent functionality
  --without-PACKAGE       do not use PACKAGE, disable dependent functionality
 where PACKAGE can be:
     MP                   Multi Protocol library])
AC_ARG_WITH(factory, \
 [    factory              polynomial factorization library])
AC_ARG_WITH(libfac, \
 [    libfac               char set and modp poly factorization library])
AC_ARG_WITH(gmp, \
 [ --with-apint=PACKAGE    use PACKAGE for arbitary integer arithmetic
                          where PACKAGE can be gmp, smallgmp, or buildin])

AC_MSG_CHECKING(whether to configure and build smallgmp lib)
if test "$enable_smallgmp" != yes && test "$enable_smallgmp" != no; then
  if test "$ac_smallgmp_ok" != yes && \
   test "$ac_gmp_ok" != yes && \
   (test "$with_apint" = smallgmp || test "${with_apint+set}" != set); then
    enable_smallgmp=yes
  else
    enable_smallgmp=no
  fi
fi
if test "$enable_smallgmp" = yes && test -d smallgmp; then
  AC_MSG_RESULT(yes)
  CONFIG_SUBDIRS="$CONFIG_SUBDIRS smallgmp"
  enable_smallgmp=yes
  ac_will_have_gmp=yes
else
  AC_MSG_RESULT(no)
  if test "$enable_smallgmp" = yes && test ! -d smallgmp; then
    AC_MSG_WARN(Did not find smallgmp subdir)
  fi
  enable_smallgmp=no
fi
if test "$ac_gmp_ok" != yes && \
  test "$ac_smallgmp_ok" != yes && \
  test "$enable_smallgmp" != yes; then
    AC_MSG_WARN(Would rather have gmp or smallgmp to build libs and Singular)
    ac_configure_args="$ac_configure_args --disable-gmp"
else
  ac_configure_args="$ac_configure_args --enable-gmp"
fi

AC_MSG_CHECKING(whether to configure and build MP lib)
if test "$enable_MP" != yes && test "$enable_MP" != no; then
  if test "$with_MP" != no && test "$ac_MP_ok" != yes; then
    enable_MP=yes
  else
    enable_MP=no
  fi
fi
if test "$enable_MP" = yes && test -d MP; then
  if test "$ac_will_have_gmp" = yes || test "$ac_gmp_ok" = yes; then
    AC_MSG_RESULT(yes)
    CONFIG_SUBDIRS="$CONFIG_SUBDIRS MP"
    ac_configure_args="$ac_configure_args --enable-MP"
  else
    AC_MSG_RESULT(no)
    AC_MSG_WARN(Can not build MP without having gmp)
    enabl_MP=no
    ac_configure_args="$ac_configure_args --disable-MP"
  fi
else
  AC_MSG_RESULT(no)
  if  test "$enable_MP" = yes && test ! -d MP; then
    AC_MSG_WARN(Did not find MP subdirectory)
  fi
  enable_MP=no
  ac_configure_args="$ac_configure_args --disable-MP"
fi

AC_MSG_CHECKING(whether to configure and build factory lib)
if test "$enable_factory" != yes && test "$enable_factory" != no; then
  if test "$with_factory" != no && test "$ac_factory_ok" != yes; then
    enable_factory=yes
  else
    enable_factory=no
  fi
fi
if test "$enable_factory" = yes && test -d factory; then
  if test "$ac_will_have_gmp" = yes  || test "$ac_gmp_ok" = yes; then
    AC_MSG_RESULT(yes)
    CONFIG_SUBDIRS="$CONFIG_SUBDIRS factory"
    ac_configure_args="$ac_configure_args --enable-factory"
  else
    AC_MSG_RESULT(no)
    AC_MSG_WARN(Can not build factory without having gmp)
    enable_factory=no
    ac_configure_args="$ac_configure_args --disable-factory"
  fi
else
  AC_MSG_RESULT(no)
  if  test "$enable_factory" = yes && test ! -d factory; then
    AC_MSG_WARN(Did not find factory subdirectory)
  fi
  enable_factory=no
  ac_configure_args="$ac_configure_args --disable-factory"
fi

AC_MSG_CHECKING(whether to configure and build libfac lib)
if test "$enable_libfac" != yes && test "$enable_libfac" != no; then
  if test "$with_libfac" != no && test "$ac_libfac_ok" != yes; then
    enable_libfac=yes
  else
    enable_libfac=no
  fi
fi
if test "$enable_libfac" = yes && test -d libfac; then
  if test "$ac_factory_ok" = yes || test "$enable_factory" = yes; then
  AC_MSG_RESULT(yes)
  CONFIG_SUBDIRS="$CONFIG_SUBDIRS libfac"
  ac_configure_args="$ac_configure_args --enable-libfac"
  else
    AC_MSG_RESULT(no)
    AC_MSG_WARN(Can not build libfac without factory)
    enable_libfac=no
    ac_configure_args="$ac_configure_args --disable-libfac"
  fi
else
  AC_MSG_RESULT(no)
  if  test "$enable_libfac" = yes && test ! -d libfac; then
    AC_MSG_WARN(Did not find libfac subdirectory)
  fi
  enable_libfac=no
  ac_configure_args="$ac_configure_args --disable-libfac"
fi

AC_MSG_CHECKING(whether to configure and build sgroup)
if test "$enable_sgroup" != no; then
    enable_sgroup=yes
fi

if test "$enable_sgroup" = yes && test -d sgroup; then
  if test "$ac_will_have_gmp" = yes  || test "$ac_gmp_ok" = yes; then
    if test "$enable_MP" != no || test "$ac_MP_ok" = yes; then
      AC_MSG_RESULT(yes)
      CONFIG_SUBDIRS="$CONFIG_SUBDIRS sgroup"
      ac_configure_args="$ac_configure_args --enable-sgroup"
    else
      AC_MSG_RESULT(no)
      AC_MSG_WARN(Can not build sgroup without having MP)
      enable_sgroup=no
      ac_configure_args="$ac_configure_args --disable-sgroup"
    fi
  else
    AC_MSG_RESULT(no)
    AC_MSG_WARN(Can not build sgroup without having gmp)
    enable_sgroup=no
    ac_configure_args="$ac_configure_args --disable-sgroup"
  fi
else
  AC_MSG_RESULT(no)
  if  test "$enable_sgroup" = yes && test ! -d sgroup; then
    AC_MSG_WARN(Did not find sgroup subdirectory)
  fi
  enable_sgroup=no
  ac_configure_args="$ac_configure_args --disable-sgroup"
fi

AC_MSG_CHECKING(whether to configure and build Singular)
if test "$enable_Singular" != yes && test "$enable_Singular" != no; then
  if test "$with_Singular" != no; then
    enable_Singular=yes
  else
    enable_Singular=no
  fi
fi
if test "$enable_Singular" = yes && test -d Singular; then
  AC_MSG_RESULT(yes)
  CONFIG_SUBDIRS="$CONFIG_SUBDIRS Singular"
  ac_configure_args="$ac_configure_args --enable-Singular"
else
  AC_MSG_RESULT(no)
  if  test "$enable_Singular" = yes && test ! -d Singular; then
    AC_MSG_WARN(Did not find Singular subdirectory)
  fi
  enable_Singular=no
  ac_configure_args="$ac_configure_args --disable-Singular"
fi


dnl lllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllll
dnl Check whether or not to use various packages
dnl
AC_MSG_CHECKING(wich apint package to use)
if test "$with_apint" != gmp && \
  test "$with_apint" != smallgmp && \
  test "$with_apint" != buildin; then
   if test "$ac_gmp_ok" = yes; then
     with_apint=gmp
   elif test "$ac_enable_smallgmp" = yes; then
     with_apint=smallgmp
   else
     with_apint=buildin
   fi
  ac_configure_args="$ac_configure_args --with-apint=$with_apint"
fi
AC_MSG_RESULT(${with_apint})

AC_MSG_CHECKING(whether to use with MP)
if test "$with_MP" != no && test "$with_MP" != yes; then
  if test "$ac_MP_ok" = yes || test "$enable_MP" = yes; then
    with_MP=yes
  else
    with_MP=no
  fi
  ac_configure_args="$ac_configure_args --with-MP=$with_MP"
fi
if test "$with_MP" = yes; then
  AC_MSG_RESULT(yes)
else
  AC_MSG_RESULT(no)
fi

if test "$enable_MP" = yes; then
  if test "${with_apint}" = smallgmp; then
    ac_configure_args="$ac_configure_args --with-default_apreal=none"
  elif test "${with_apint}" = buildin; then
    ac_configure_args="$ac_configure_args --with-default_apreal=none --with-default-apint=none"
  fi
fi

AC_MSG_CHECKING(whether to use with factory)
if test "$with_factory" != no && test "$with_factory" != yes; then
  if test "$ac_factory_ok" = yes || test "$enable_factory" = yes; then
    with_factory=yes
  else
    with_factory=no
  fi
  ac_configure_args="$ac_configure_args --with-factory=$with_factory"
fi
if test "$with_factory" = yes; then
  AC_MSG_RESULT(yes)
else
  AC_MSG_RESULT(no)
fi

AC_MSG_CHECKING(whether to use with libfac)
if test "$with_libfac" != no && test "$with_libfac" != yes; then
  if test "$ac_libfac_ok" = yes || test "$enable_libfac" = yes; then
    with_libfac=yes
  else
    with_libfac=no
  fi
  ac_configure_args="$ac_configure_args --with-libfac=$with_libfac"
fi
if test "$with_libfac" = yes; then
  AC_MSG_RESULT(yes)
else
  AC_MSG_RESULT(no)
fi

AC_MSG_CHECKING(whether to use with Singular)
if test "$with_Singular" != no && test "$with_Singular" != yes; then
  if test "$enable_Singular" = yes; then
    with_Singular=yes
  else
    with_Singular=no
  fi
  ac_configure_args="$ac_configure_args --with-Singular=$with_Singular"
fi

if test "$with_Singular" != no; then
  AC_MSG_RESULT(yes)
else
  AC_MSG_RESULT(no)
fi

dnl lllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllll
dnl Check for known subdirs
dnl
if test -d smallgmp; then
  SUBDIRS="smallgmp"
fi
if test -d MP; then
  SUBDIRS="$SUBDIRS MP"
fi
if test -d factory; then
  SUBDIRS="$SUBDIRS factory"
fi
if test -d libfac; then
  SUBDIRS="$SUBDIRS libfac"
fi
if test -d Singular; then
  SUBDIRS="$SUBDIRS Singular"
fi
  

dnl lllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllll
dnl Enough --wrap it up
dnl
AC_PROG_MAKE_SET
AC_SUBST(SUBDIRS)
AC_SUBST(CONFIG_SUBDIRS)
AC_CONFIG_SUBDIRS($CONFIG_SUBDIRS) 

AC_OUTPUT(Makefile)