dnl configure.in
dnl
dnl Process this file with autoconf to produce a configure script.
dnl
dnl Copyright (C) 1998, 1999 R Core Team
###
### This file is part of R.
###
### R is free software; you can redistribute it and/or modify it under
### the terms of the GNU General Public License as published by the Free
### Software Foundation; either version 2 of the License, or (at your
### option) any later version.
###
### R is distributed in the hope that it will be useful, but WITHOUT ANY
### WARRANTY; without even the implied warranty of MERCHANTABILITY or
### FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public
### License for more details.
###
### You should have received a copy of the GNU General Public License
### along with R; if not, you can obtain it via the World Wide Web at
### `http://www.gnu.org/copyleft/gpl.html', or by writing to the Free
### Software Foundation, 59 Temple Place -- Suite 330, Boston, MA
### 02111-3307, USE.

AC_INIT(src/include/Defn.h)
AC_CONFIG_HEADER(src/include/Platform.h)

. ${srcdir}/config.site
if test -f ${HOME}/.Rconf; then . ${HOME}/.Rconf; fi

R_MAJOR="0"
R_MINOR="64.2"
R_STATUS=""
#R_STATUS="Patched (unreleased snapshot)"
R_STATUS_REV="0"

AC_CONFIG_AUX_DIR(tools)

### Platform
###
### In an ideal world we would use AC_CANONICAL_HOST here, but this
### fails on platforms like the i686 (aka Pentium-Pro) because of some
### sort of sanity check written into configure.  We bypass the check by
### invoking config.guess directly and parsing the results ourselves.

host=`${srcdir}/tools/config.guess`
set `echo ${host} | tr '-' ' '`
host_cpu=$1
host_vendor=$2
host_os=$3

AC_DEFINE_UNQUOTED(R_MAJOR, "${R_MAJOR}")
AC_DEFINE_UNQUOTED(R_MINOR, "${R_MINOR}")
AC_DEFINE_UNQUOTED(R_STATUS, "${R_STATUS}")
AC_DEFINE_UNQUOTED(R_STATUS_REV, "${R_STATUS_REV}")
AC_DEFINE_UNQUOTED(R_DAY, "`awk -F/ '{print $3+0}' ${srcdir}/date-stamp`")
AC_DEFINE_UNQUOTED(R_MONTH, "`awk -F/ '{print $2}' ${srcdir}/date-stamp`")
AC_DEFINE_UNQUOTED(R_YEAR, "`awk -F/ '{print $1}' ${srcdir}/date-stamp`")
AC_DEFINE_UNQUOTED(R_PLATFORM, "${host}")
AC_DEFINE_UNQUOTED(R_CPU, "${host_cpu}")
AC_DEFINE_UNQUOTED(R_VENDOR, "${host_vendor}")
AC_DEFINE_UNQUOTED(R_OS, "${host_os}")

PACKAGE="R"
VERSION="${R_MAJOR}.${R_MINOR}"
AC_SUBST(PACKAGE)
AC_SUBST(VERSION)

### Handle arguments to configure

config_opts=${ac_configure_args}
AC_SUBST(config_opts)

## Allow the user to force us to use f2c.

AC_ARG_WITH(f2c,
  [  --with-f2c              use f2c even if FORTRAN compiler is available],
  [if test "${withval}" = no; then use_f2c=false; else use_f2c=true; fi],
  use_f2c=false)

## Allow the user to force us to use g77.

AC_ARG_WITH(g77,
  [  --with-g77              use g77 to compile FORTRAN subroutines],
  [if test "${withval}" = no; then use_g77=false; else use_g77=true; fi],
  use_g77=false)

## Allow the user to force us to use f77.

AC_ARG_WITH(f77,
  [  --with-f77              use f77 to compile FORTRAN subroutines],
  [if test "${withval}" = no; then use_f77=false; else use_f77=true; fi],
  use_f77=false)

## Here we should maybe check that only one of the above options for
## dealing with FORTRAN were specified.

AC_ARG_WITH(libmoto,
  [  --with-libmoto          use libmoto math library (if available)],
  [ if test "${withval}"=no;
      then use_libmoto=false;
      else use_libmoto=true;
    fi],
   use_libmoto=true)
      
AC_ARG_WITH(blas,
  [  --with-blas             use BLAS library (if available)],
  [if test "${withval}" = no;
    then use_blas=false;
    else use_blas=true;
  fi],
  use_blas=true)

AC_ARG_WITH(blas_risc,
  [  --with-blas_risc        use RISC Optimized BLAS library (if available)],
  [ if test "${withval}" = no;
     then use_blas_risc=false;  
     else use_blas_risc=true;
    fi],
    use_blas_risc=true)

AC_ARG_WITH(dxml,
  [  --with-dxml             use DXML library (if available)],
  [if test "${withval}" = no;
    then use_dxml=false;
    else use_dxml=true;
  fi],
  use_dxml=true)

AC_ARG_WITH(readline,
  [  --with-readline         use readline library (if available)],
  [if test "${withval}" = no;
    then use_readline=false;
    else use_readline=true;
   fi],
  use_readline=true)

AC_ARG_WITH(gnome,
  [  --with-gnome            use GNOME (if available)],
  [if test "${withval}" = no;
    then use_gnome=false;
    else use_gnome=true;
   fi],
  use_gnome=false)

### Programs.

AC_PROG_INSTALL
## Fix a bug in older versions of autoconf---the path of the install
## shell script is not cached.  Could also use an absolute path in
## AC_CONFIG_AUX_DIR().
case ${INSTALL} in
  [[!/]]*install-sh*)
    INSTALL="\$\(top_srcdir\)/${INSTALL}" ;;
esac
## Osman says that this is necessary.
case ${host} in
  *hpux*)
    INSTALL="\$\(top_srcdir\)/tools/install-sh -c" ;;
esac

AC_PROG_LN_S
AC_PROG_RANLIB
AC_PROG_YACC

AC_CHECK_PROG(AR, ar, ar)
AC_SUBST(AR)
ARFLAGS=${ARFLAGS-"rc"}
AC_SUBST(ARFLAGS)

AC_PATH_PROG(LATEX, latex, false)
AC_PATH_PROG(DVIPS, dvips, false)
AC_PATH_PROG(MAKEINDEX, makeindex, false)

AC_PATH_PROG(R_UNZIPCMD, unzip, "")
AC_PATH_PROG(R_ZIPCMD, zip, "")

## Make.

MAKE=${MAKE-make}
AC_SUBST(MAKE)

## Perl.

AC_PATH_PROG(PERL, perl)
if test -n "${PERL}"; then
  AC_MSG_CHECKING(whether perl is perl 5)
  perl_version=`${PERL} -v | sed -n 's/^.*perl.*version \(.\).*/\1/p'`
  if test ${perl_version} -ge 5; then
    NO_PERL5=false
    AC_MSG_RESULT(yes)
  else
    NO_PERL5=true
    AC_MSG_RESULT(no)
  fi
else
  NO_PERL5=true
fi
AC_SUBST(NO_PERL5)

## Tar.

TAR=${TAR-tar}
AC_SUBST(TAR)

## C compiler.
##
## If a C compiler is specified in config.site we use that.
## Otherwise, we use the autoconfigure procedures for detecting one.

if test -z "${CC}"
then
  AC_PROG_CC
else
  AC_CHECK_PROG(CC, ${CC})
fi

CFLAGS=${CFLAGS-"-g"}

cc_is_gcc=false
cc_output=`${CC} -v 2>&1 | grep gcc`
if test -n "${cc_output}"; then
  cc_is_gcc=true
fi

case ${host} in
  *hpux*)
    LIBS="-L/lib/pa1.1 ${LIBS}"
    case ${CC} in
      c89)
        CFLAGS="-D_HPUX_SOURCE ${CFLAGS}" ;;
    esac
esac

## FORTRAN compiler

## If we haven't been forced to use a particular FORTRAN compiler, try
## to find one using one of the several common names.
##
## The configure options `--with-g77', `--with-f77', or `--with-f2c'
## force g77, f77, or f2c to be used.  It is also possible to use these
## options to specify the full path name of the compiler.

f77_is_g77=false
if ${use_f77}; then
  if test "${with_f77}" = yes; then
    F77=f77
  else
    F77="${with_f77}"
  fi
  AC_MSG_RESULT([defining F77 to be ${F77}])
elif ${use_g77}; then
  if test "${with_g77}" = yes; then
    F77=g77
  else
    F77="${with_g77}"
  fi
  AC_MSG_RESULT([defining F77 to be ${F77}])
elif ${use_f2c}; then
  F77=
  if test "${with_f2c}" = yes; then
    F2C=f2c
  else
    F2C="${with_f2c}"
  fi
  AC_MSG_RESULT([defining F2C to be ${F2C}])
else
  if test -z "${FC}"; then
    AC_PATH_PROGS(F77, g77 f77 fort77 f90 xlf cf77 fc)
    if test -n "${F77}"; then
      if test -n "`file ${F77} | grep script`"; then
        ## If F77 found above is a shell or perl script, don't use it.
	F77=
      else
        F77=`basename ${F77}`
      fi
    fi
  else
    F77=${FC}
  fi
  if test -z "${F77}"; then
    AC_CHECK_PROGS(F2C, f2c)
  else
    f77_output=`${F77} -v 2>&1 | egrep "GNU F77|egcs|g77"`
    if test -n "${f77_output}"; then
      f77_is_g77=true
    fi
  fi
fi

if test -n "${F77}"; then
  FC=${F77}
  LDCMD=${LDCMD-${FC}}
  AC_MSG_CHECKING(for underscore after Fortran symbols)
  cat > conftestf.f <<EOF
      subroutine try
      end
EOF
  ${FC} -c ${FFLAGS} conftestf.f 2>/dev/null 1>/dev/null
  cat > conftest.c <<EOF
main() { try_(); }
EOF
  ${CC} ${CFLAGS} ${CPPFLAGS} ${LDFLAGS} -o conftest \
    conftest.c conftestf.o 1>/dev/null 2>/dev/null
  if test ${?} = 0; then
    AC_MSG_RESULT(yes)
    AC_DEFINE(HAVE_F77_UNDERSCORE)
  else
    cat > conftest.c <<EOF
main() { try(); }
EOF
    ${CC} ${CFLAGS} ${CPPFLAGS} ${LDFLAGS} -o conftest \
      conftest.c conftestf.o 1>/dev/null 2>/dev/null
    if test ${?} = 0; then
      AC_MSG_RESULT(no)
    else
      AC_MSG_ERROR([Nothing worked - cannot use FORTRAN])
    fi
  fi
  rm -rf conftest conftest.* conftestf.*
  f77_rules_frag_top=Makefrag.top
  cat << \EOF > ${f77_rules_frag_top}
.f.c:
.f.o:
	$(FC) $(FFLAGS) -c $< -o $@
EOF
  f77_rules_frag_etc=Makefrag.etc
  cat << \EOF > ${f77_rules_frag_etc}
.f.c:
.f.o:
	$(FC) $(FFLAGS) $(FPICFLAGS) -c $< -o $@
EOF
elif test -n "${F2C}"; then
  ## I cannibalized most of the following out of octave 2.0.5, I have
  ## only a vague idea how it works... (-pd) 
  ##
  ## This seems to be necessary on some Linux system.
  ## -- you bet! -pd
  cat > conftest.${ac_ext} << EOF
int MAIN_ () { return 0; }
int MAIN__ () { return 0; }
EOF
  ## XXX FIXME XXX -- these shouldn't be fixed names, eh?
  R_conflib=libconflib.a
  R_obj_ext=o
  if AC_TRY_EVAL(ac_compile); then
    $AR $ARFLAGS $R_conflib conftest.$R_obj_ext 1>&AC_FD_CC
    if test -n "$RANLIB"; then
      $RANLIB $R_conflib 1>&AC_FD_CC
    fi
  fi
  rm -f conftest*

  LDCMD=${LDCMD-${CC}}
  AC_DEFINE(HAVE_F77_UNDERSCORE)
  AC_CHECK_LIB(f2c, f_open, FLIBS=-lf2c, FLIBS=, -L. -lconflib -lm)
  if test -z "${FLIBS}"; then
    AC_CHECK_LIB(F77, d_sin, FLIBS=-lF77, FLIBS=, -lm)
    if test -n "${FLIBS}"; then
      AC_CHECK_LIB(I77, f_rew, FLIBS="${FLIBS} -lI77", FLIBS=, -lF77)
    fi
  fi
  if test -z "${FLIBS}"; then
    AC_MSG_WARN([I found f2c but not libf2c, or libF77 and libI77])
  fi
  f77_rules_frag_top=Makefrag.top
  ## for some reason these can't be .f.c/.f.o, at least in GNU make
  ## this probably makes *other* makes useless... (-pd)
  cat << \EOF > ${f77_rules_frag_top}
%.c : %.f
	cat $< | $(F2C) $(F2CFLAGS) > $(@F)
%.o : %.f
EOF
  f77_rules_frag_etc=Makefrag.etc
  cat << \EOF > ${f77_rules_frag_etc}
%.c : %.f
	cat $< | $(F2C) $(F2CFLAGS) > $(@F)
%.o : %.f
EOF
else
  AC_MSG_ERROR([Neither an F77 compiler nor f2c found])
fi

if test "${FC}" = g77; then
  FFLAGS=${FFLAGS-"-O2"}
fi

AC_SUBST(FC)
AC_SUBST(F2C)
AC_SUBST_FILE(f77_rules_frag_top)
AC_SUBST_FILE(f77_rules_frag_etc)

### Libraries.

## Make sure that non-standard directories specified via `-L' are really
## searched in the tests
for arg in ${LIBS}; do
  case ${arg} in
    -L*)
      lib=`echo ${arg} | sed 's/^-L//'`
      if test -z "${LD_LIBRARY_PATH}"; then
        LD_LIBRARY_PATH="${lib}"
      else
        LD_LIBRARY_PATH="${LD_LIBRARY_PATH}:${lib}"
      fi
      ;;
  esac
done
export LD_LIBRARY_PATH

AC_CHECK_LIB(m, sin)
if ${use_libmoto}; then
   AC_CHECK_LIB(moto, sin)
fi
AC_CHECK_LIB(ncurses, main,,
  AC_CHECK_LIB(termcap, main,,
    AC_CHECK_LIB(termlib, main)
))
AC_CHECK_LIB(dl, dlopen)

AC_CHECK_LIB(z, main)
AC_CHECK_LIB(hdf5, main)

BLAS="blas.o"
if ${use_dxml}; then
  AC_CHECK_LIB(dxml, main, FLIBS="-ldxml ${FLIBS}" BLAS="")
fi
if test -n "${BLAS}" && ${use_blas}; then
  AC_CHECK_LIB(blas, main,
    [ FLIBS="-lblas ${FLIBS}" BLAS=""
      if ${use_blas_risc}; then
        AC_CHECK_LIB(blas_risc, main,
	  FLIBS="-lblas_risc ${FLIBS}", , -lblas -lf2c)
      fi
    ])
fi
AC_SUBST(BLAS)
for arg in ${LIBS}; do
  case ${arg} in
    -L*)
      FLIBS="${arg} ${FLIBS}"
      ;;
  esac
done
AC_SUBST(FLIBS)
if ${use_readline}; then
  AC_CHECK_LIB(readline, rl_callback_read_char)
fi

if ${use_gnome}; then
  GNOME_INIT_HOOK([],cont)
fi
if test "${GNOMEUI_LIBS}" = ""; then
  use_gnome="no"
  RGNOMEDIR=""
  RGNOMEBIN=""
else
  use_gnome="yes"
  RGNOMEDIR="gnome"
  RGNOMEBIN="\$(top_builddir)/bin/R.gnome"
fi
AC_SUBST(RGNOMEDIR)
AC_SUBST(RGNOMEBIN)

### Library functions.

AC_FUNC_VFORK
AC_FUNC_VPRINTF
AC_CHECK_FUNCS(acosh asinh atanh bcopy finite isfinite isnan\
  matherr memcpy \
  memmove regcomp rint strcoll strtod strtol system times sigsetjmp\
  siglongjmp __setfpucw)

### Header files

AC_HEADER_STDC
AC_CHECK_HEADERS(dl.h dlfcn.h elf.h locale.h readline/history.h \
  rpc/xdr.h sys/times.h time.h ieeefp.h ieee754.h unistd.h hdf5.h)
case ${host} in
  *sunos4*)
    AC_DEFINE(SunOS4) ;;
esac    

### Typedefs

AC_TYPE_SIGNAL

### Compiler characteristics.

AC_C_CONST
AC_CHECK_SIZEOF(long, 4)
SIZEOF_LONG=`grep SIZEOF_LONG confdefs.h | sed 's/.* //'`
if test ${SIZEOF_LONG} -lt 4; then
  echo "Size of long must be at least 32 bits"
  exit 32
elif test ${SIZEOF_LONG} -eq 4; then
  AC_DEFINE(LONG_32_BITS)
fi
  
case ${host} in
  *irix*)
    AC_MSG_CHECKING(whether compilers need -OPT:IEEE_NaN_inf=ON)
    AC_TRY_RUN(
      changequote(<<, >>)dnl
      <<
      #include <math.h>
      #include <ieeefp.h>
      int main () {
        double x = 0;
        fpsetmask(0); x = x / x; return (x != x);
      }
      >>,
      changequote([, ])dnl
      AC_MSG_RESULT(yes)
      CFLAGS="${CFLAGS} -OPT:IEEE_NaN_inf=ON"
      FFLAGS="${FFLAGS} -OPT:IEEE_NaN_inf=ON",
      AC_MSG_RESULT(no),
      AC_MSG_WARN(cannot determine when cross-compiling))
    ;;
esac    

##  DLL linking.

SHLIBLD=ld
SHLIBEXT=so

#  We create a fake Imakefile and then run xmkmf so that we can
#  determine PICFLAGS and SHLIBLDFLAGS.
#
#  DLLFLAGS     - flags for loading the main
#  CPICFLAGS    - flags for compiling C library code
#  FPICFLAGS    - flags for compiling Fortran library code
#  SHLIBLDFLAGS - flags for creating DLLs
#
#  Damn!  It seems that this can lead to using the wrong options
#  if the CC we have differs from that which imake knows about.
#  Lets always use -fpic when CC=gcc.
#
#  As a final safeguard, any options specified in config.site will
#  override anything we discover below.

AC_PATH_PROG(XMKMF, xmkmf, , ${PATH}:/usr/bin/X11:/usr/X11R6/bin)
if test -n "${XMKMF}"; then
  AC_MSG_CHECKING(how to make shared libraries)
  # mv ${srcdir}/Makefile ${srcdir}/Makefile-SAFE
  echo > Imakefile
  ${XMKMF} > /dev/null
  cpicflags=`grep '^ *PICFLAGS' Makefile | sed 's/^ *PICFLAGS *= *//'`
  shlibldflags=`grep 'SHLIBLDFLAGS' Makefile | sed 's/ *SHLIBLDFLAGS *= *//'`
  rm Imakefile Makefile
  # mv ${srcdir}/Makefile-SAFE ${srcdir}/Makefile
  AC_MSG_RESULT(done)
else
  cpicflags=
  shlibldflags=
  AC_MSG_WARN([Cannot determine how to create shared libraries.
    Please set CPICFLAGS, FPICFLAGS and SHLIBLDFLAGS in \`config.site'.])
fi

if test "${CC}" = gcc; then
  cpicflags=-fpic
fi

CPICFLAGS=${CPICFLAGS-${cpicflags}}
FPICFLAGS=${FPICFLAGS-${CPICFLAGS}}
SHLIBLDFLAGS=${SHLIBLDFLAGS-${shlibldflags}}

## Individual platform overrides.

case "${host}" in
  alpha*osf*)
    CFLAGS="-ieee_with_inexact ${CFLAGS}"
    AC_DEFINE(HAVE_NO_SYMBOL_UNDERSCORE)
    CPICFLAGS=
    SHLIBLDFLAGS=-shared
    ;;
  alpha*linux)
    CFLAGS="-mieee ${CFLAGS}"
    DLLFLAGS=-export-dynamic
    ;;
  *linuxaout)
    sed '/HAVE_ELF_H/d' confdefs.h > tmp.h ; mv tmp.h confdefs.h
    LDCMD=gcc
    LIBS="-lf2c ${LIBS}"
    ;;
  *linux)
    DLLFLAGS=-export-dynamic
    ;;
  *netbsd*)
    if ${CPP} - -dM < /dev/null | grep -q __ELF__; then
      DLLFLAGS="-export-dynamic"
      SHLIBLDFLAGS="-shared"
    else
      SHLIBLDFLAGS="-Bshareable"
    fi
    ;;
  *sgi*)
    SHLIBLDFLAGS="-shared"
    if ${cc_is_gcc}; then
      CPICFLAGS=-fPIC
    else
      CPICFLAGS=-KPIC
    fi
    if ${f77_is_g77}; then
      FPICFLAGS=-fPIC
    else
      FPICFLAGS=-KPIC
    fi
    ;;
  *hpux*)
    AC_DEFINE(USE_BUILTIN_RINT)
    case "${CC}" in
      c89*)
        CPICFLAGS="+z" ;;
      gcc*)
	CPICFLAGS="-fpic" ;;
    esac
    DLLFLAGS="-Wl,-E"
    SHLIBLDFLAGS=-b
    SHLIBEXT=sl
    LIBS="${LIBS} -ldld"
    ;;
  *solaris*)
    SHLIBLDFLAGS="-G"
    if ${cc_is_gcc}; then
      CPICFLAGS=-fPIC
    else
      CPICFLAGS=-KPIC
    fi
    if ${f77_is_g77}; then
      FPICFLAGS=-fPIC
    else
      FPICFLAGS=-PIC
    fi
    ;;
esac

AC_SUBST(LDCMD)
AC_SUBST(DLLFLAGS)
AC_SUBST(CPICFLAGS)
AC_SUBST(FPICFLAGS)
AC_SUBST(SHLIBLDFLAGS)
AC_SUBST(SHLIBEXT)
AC_SUBST(SHLIBLD)
AC_DEFINE_UNQUOTED(SHLIBEXT, "${SHLIBEXT}")

### System services.

## X11 locations
##
## Here we use the standard X11 search macro.
## We force the use of -lX11 (perhaps this is not necessary).

AC_PATH_XTRA
if test -z "${no_x}"; then
  X_LIBS="${X_LIBS} -lX11"
fi

### Miscellaneous.

## Printing
##
## We look to see whether we have "lpr" or "lp".  Some platforms
## provide both (SunOS and HPUX), and in those cases we choose lpr.

if test -z "${R_PRINTCMD}"; then
  AC_CHECK_PROGS(R_PRINTCMD, lpr lp)
fi
AC_DEFINE_UNQUOTED(R_PRINTCMD, "${R_PRINTCMD}")

if test -z "${R_PAPERSIZE}"; then
  R_PAPERSIZE=a4
fi
AC_SUBST(R_PAPERSIZE)

## Saving.

AC_SUBST(R_BATCHSAVE)

### Output.

AC_SUBST(CFLAGS)
AC_SUBST(FFLAGS)
AC_SUBST(F2CFLAGS)

AC_OUTPUT(Makeconf Makefile
  afm/Makefile
  demos/Makefile
  doc/Makefile doc/keyword-test
  doc/manual/Makefile doc/manual/lib2tex
  doc/manual/Reference.tex doc/manual/Manual.tex
  etc/Makefile etc/Makeconf
  src/Makefile src/appl/Makefile src/include/Makefile
  src/library/Makefile src/main/Makefile src/nmath/Makefile
  src/scripts/Makefile src/unix/Makefile src/gnome/Makefile
  src/library/base/Makefile src/library/profile/Makefile
  src/library/eda/Makefile src/library/eda/src/Makefile
  src/library/lqs/Makefile src/library/lqs/src/Makefile
  src/library/modreg/Makefile src/library/modreg/src/Makefile
  src/library/mva/Makefile src/library/mva/src/Makefile
  src/library/stepfun/Makefile
  src/scripts/COMPILE src/scripts/INSTALL src/scripts/REMOVE
  src/scripts/R.sh src/scripts/Rdconv src/scripts/Rdindex
  src/scripts/Rman2Rd src/scripts/SHLIB src/scripts/Sd2Rd
  src/scripts/build-help src/scripts/fwf2table src/scripts/help.pretty
  src/scripts/html2dos src/scripts/Rd2contents
  tests/Makefile tests/Examples/Makefile
)

AC_OUTPUT_COMMANDS(
  chmod +x doc/keyword-test doc/manual/lib2tex
)

if test -z "${F77}"; then
  FORT="${F2C} ${F2CFLAGS}"
else
  FORT="${F77} ${FFLAGS}"
fi

AC_MSG_RESULT([

R is now configured for ${host}

  Source directory:         ${srcdir}
  Installation directory:   ${prefix}
  C compiler:               ${CC} ${CFLAGS}
  FORTRAN compiler:         ${FORT}
  Gnome support:            ${use_gnome}
])