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

dnl
dnl Initialisation
dnl
AC_INIT(factor.h)

dnl
dnl Set up variables for Makefile.in
dnl
dnl Change libfac variables here:
AC_SUBST(libfac_name)
libfac_name="\"Factorization and characteristic sets library\""
AC_SUBST(libfac_version)
libfac_version="0.3.0"
AC_SUBST(libfac_date)
libfac_date="\"Sep 11 1997\""
AC_SUBST(libfac_author)
libfac_author="\"M. Messollen\""

AC_SUBST(libfac)
libfac="libfac"
AC_SUBST(libfac_g)
libfac_g="libfac-g"
AC_SUBST(libsingfac)
libsingfac="libsingfac"
AC_SUBST(libsingfac_g)
libsingfac_g="libsingfac-g"
AC_SUBST(factorH)
factorH="factor.h"
AC_SUBST(targetname)

dnl
dnl Parse options
dnl

AC_ARG_WITH(
  debug,
  [  --with-debug    build with debugging options turned on])

AC_ARG_WITH(
  Singular,
  [  --with-Singular build for use with Singular])

if test "$with_Singular" = yes; then
  AC_DEFINE(SINGULAR)
  AC_DEFINE(NOSTREAMIO)
  if test "$with_debug" = yes; then
     targetname="libsingfac-g"
  else
     targetname="libsingfac"
  fi
else
  if test "$with_debug" = yes; then
     targetname="libfac-g"
  else
     targetname="libfac"
  fi
fi

dnl
dnl add to -I and -L, if necessary 
dnl
if (test "x${prefix} != xNONE && test "${prefix} != "/usr/local") || \
  test "${ac_default_prefix}" != "/usr/local" || \
  test "${includedir}" != '${prefix}/include'; then 
  CPPFLAGS="-I${includedir} ${CPPFLAGS}"
fi
CPPFLAGS="-I./factor ${CPPFLAGS}"

if (test "x${prefix} != xNONE && test "${prefix} != "/usr/local") || \
  test "${ac_default_prefix}" != "/usr/local" || \
  test "${libdir}" != '${prefix}/lib'; then 
  LDFLAGS="-L${libdir} ${LDFLAGS}"
fi
LDFLAGS="-L. ${LDFLAGS}"

if test "${CXXFLAGS+set}" != set; then
  ac_cxxflags_set=no
  if test "$with_debug" = yes; then
    CXXFLAGS="-g"
  else
    CXXFLAGS="-O"
    AC_DEFINE(NDEBUG)
  fi  
fi

dnl
dnl Checks for programs.
dnl
AC_LANG_CPLUSPLUS  
AC_PROG_CXX
AC_REQUIRE_CPP
AC_PROG_MAKE_SET
AC_PROG_RANLIB
AC_CHECK_PROG(AR,ar,ar)
if test -z "$AR"; then
  AC_MSG_ERROR(Need ar)
fi

dnl
dnl programs for installation
dnl
dnl ac_save_path=${PATH}
dnl PATH="$PATH:.."  
dnl AC_PROG_INSTALL
dnl AC_PATH_PROG(MKINSTALLDIRS, mkinstalldirs, -mkdir -p)
dnl PATH="$ac_save_path"

dnl
dnl Checks for header files.
dnl
AC_CHECK_HEADER(factory.h,,AC_MSG_WARN(factory.h not found! Install factory before building libfac!))

dnl
dnl Checks for libraries.
dnl


dnl
dnl Checks for typedefs, structures, and compiler characteristics.
dnl
AC_C_CONST
AC_C_INLINE

dnl
dnl Last, but not least, customize CFLAGS
dnl
if test ${GXX} = yes; then

# check whether CXX accepts --no-rtti
AC_MSG_CHECKING(whether gcc accepts --no-rtti)
tmp_flags=${CXXFLAGS}
CXXFLAGS="${CXXFLAGS} --no-rtti"
AC_LANG_SAVE
AC_LANG_CPLUSPLUS
AC_CACHE_VAL(ac_cv_cxx_have_rtti,
AC_TRY_COMPILE(,,ac_cv_cxx_have_rtti=yes,ac_cv_cxx_have_rtti=no)
)
AC_MSG_RESULT(${ac_cv_cxx_have_rtti})
if test "${ac_cv_cxx_have_rtti}" != yes; then
CXXFLAGS=$temp_flags
else
CXX="${CXX} --no-rtti"
fi

# check whether gcc accepts --no-exceptions
AC_MSG_CHECKING(whether gcc accepts --no-exceptions)
CXXFLAGS="${CXXFLAGS} --no-exceptions"
AC_CACHE_VAL(ac_cv_cxx_have_exceptions,
AC_TRY_COMPILE(,,ac_cv_cxx_have_exceptions=yes,ac_cv_cxx_have_exceptions=no)
)
AC_MSG_RESULT(${ac_cv_cxx_have_exceptions})
if test "${ac_cv_cxx_have_exceptions}" != yes; then
CXXFLAGS=$temp_flags
else
CXX="${CXX} --no-exceptions"
fi

AC_LANG_RESTORE
CXXFLAGS=$temp_flags
  
fi

  if test "$ac_cxxflags_set" = no; then
    if test "$with_debug" = yes; then
       CXXFLAGS="-O -g"
    else
       CXXFLAGS="-O3 "
    fi
  fi
  CXXTEMPLFLAGS="-fno-implicit-templates"
else
  CXXTEMPFLAGS=""
fi
AC_SUBST(CXXTEMPLFLAGS)
  
AC_OUTPUT(Makefile)

dnl 
dnl Plans:
dnl 1) look for libraries (warn if not found) for building testprog
dnl 1) search for perl