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#                                               -*- Autoconf -*-
# Process this file with autoconf to produce a configure script.

AC_PREREQ(2.59)
AC_INIT(cfitsio, 3.040, pence@tetra.gsfc.nasa.gov)
AM_INIT_AUTOMAKE([foreign])
AC_PROG_LIBTOOL

AC_CHECK_PROGS(FC, f77 xlf cf77 gf77 gfortran g77 af77 ncf f2c ifort g95 , nope)
if test $FC = 'nope' ; then
   AC_MSG_WARN(cfitsio: == No acceptable f77 found in \$PATH)
   AC_MSG_WARN(cfitsio: == Cfitsio will be built without Fortran wrapper support)
   FC=
   F77_WRAPPERS=
else
  CFORTRANFLAGS=
  F77_WRAPPERS="\${FITSIO_SRC}"
  echo $ac_n "checking whether we are using GNU Fortran""... $ac_c" 1>&6
  if test `$FC --version -c < /dev/null 2> /dev/null | grep -c GNU` -gt 0 -o \
          `$FC --version -c < /dev/null 2> /dev/null | grep -ic egcs` -gt 0
  then
    echo "$ac_t""yes" 1>&6
    echo $ac_n "cfitsio: == Adding wrapper support for GNU Fortran""... $ac_c" 1>&6
    CFORTRANFLAGS="-Dg77Fortran"
    echo "$ac_t"" done" 1>&6
  else
    echo "$ac_t""no" 1>&6
    if test $FC = 'f2c' ; then
      echo $ac_n "cfitsio: == Adding wrapper support for f2c""... $ac_c" 1>&6
      CFORTRANFLAGS="-Df2cFortran"
      echo "$ac_t"" done" 1>&6
    fi
  fi
fi


# taken from configure.in
# determine system type
#--------------------------------------------------------------------
AC_PROGRAM_CHECK(uname_found, uname, 1, 0)

if test $uname_found -eq 0 ; then
    echo "cfitsio: No uname found; setting system type to unknown."
    system="unknown"
else
    system=`uname -s`-`uname -r`
fi

case $system in
    Darwin-*)
        # For large file support (but may break Absoft compilers):
        AC_DEFINE(_LARGEFILE_SOURCE)
        AC_DEFINE(_FILE_OFFSET_BITS,64)
	;;
    HP-UX-*)
	if test "x$CFORTRANFLAGS" = x ; then
		CFORTRANFLAGS="-Dappendus"
	fi
	CFLAGS="$CFLAGS -DPG_PPU" 
	LIBPRE="-Wl,"
	;;
    SunOS-5*)
	if test "x$CFORTRANFLAGS" = x ; then
		CFORTRANFLAGS="-Dsolaris"
	fi
        # For large file support:
        AC_DEFINE(_LARGEFILE_SOURCE)
        AC_DEFINE(_FILE_OFFSET_BITS,64)
	;;
    IRIX*)
	CFLAGS="$CFLAGS -DHAVE_POSIX_SIGNALS"
	;;
    Linux*)
        AC_DEFINE(_LARGEFILE_SOURCE)
        AC_DEFINE(_FILE_OFFSET_BITS,64)
	;;
    CYGWIN*)
	CFLAGS="$CFLAGS -DHAVE_POSIX_SIGNALS"
	;;
    *)
	;;
esac

CFLAGS="$CFLAGS $CFORTRANFLAGS"

case $CC in
	gcc)
		GCCVERSION="`gcc -dumpversion 2>&1`"
		echo "cfitsio: == Using gcc version $GCCVERSION"
		AC_SUBST(GCCVERSION)
                changequote(,)
		if test `echo $GCCVERSION | grep -c '2\.[45678]'` -gt 0
		then
		    CFLAGS=`echo $CFLAGS | sed 's:-O[^ ]* *::'`
#		    AC_MSG_WARN(This gcc is pretty old. Disabling optimization to be safe.)
		fi
                changequote([,])
		;;
	cc)
		echo "cfitsio: Old CFLAGS is $CFLAGS"
		CFLAGS=`echo $CFLAGS | sed -e "s/-g/-O/"`
		case $system in
		    SunOS-5*)
			changequote(,)
			if test `echo $CFLAGS | grep -c fast` -gt 0
			then
			   echo "cfitsio: Replacing -fast with -O3"
			   CFLAGS=`echo $CFLAGS | sed 's:-fast:-O3:'`
			fi
			changequote([,])
         		CFLAGS="$CFLAGS -DHAVE_ALLOCA_H -DHAVE_POSIX_SIGNALS"
			;;
		    *)
			echo "== No special changes for $system"
			;;
		esac
		echo "New CFLAGS is $CFLAGS"
		;;
	*)
		# Don't do anything now
		;;
esac

# ================= test for the unix ftruncate function ================

AC_MSG_CHECKING("whether ftruncate works")
AC_TRY_LINK([#include <unistd.h>
], [
ftruncate(0, 0);
], [
AC_DEFINE(HAVE_FTRUNCATE)
AC_MSG_RESULT("yes")
], AC_MSG_RESULT("no") )


# ---------------------------------------------------------
# some systems define long long for 64-bit ints
# ---------------------------------------------------------
 
AC_MSG_CHECKING("whether long long is defined")
AC_TRY_COMPILE([#include <stdlib.h>
], [
long long filler;
], [
AC_DEFINE(HAVE_LONGLONG)
AC_MSG_RESULT("yes")
], AC_MSG_RESULT("no") )

# ==================== SHARED MEMORY DRIVER SECTION =======================
#
# 09-Mar-98 : modified by JB/ISDC
# 3 checks added to support autoconfiguration of shared memory
# driver. First generic check is made whether shared memory is supported
# at all, then 2 more specific checks are made (architecture dependent).
# Currently tested on : sparc-solaris, intel-linux, sgi-irix, dec-alpha-osf

# -------------------------------------------------------------------------
# check is System V IPC is supported on this machine
# -------------------------------------------------------------------------

AC_MSG_CHECKING("whether system V style IPC services are supported")
AC_TRY_LINK([#include <sys/ipc.h>
#include <sys/shm.h>
#include <sys/sem.h>
], [
shmat(0, 0, 0);
shmdt(0);
shmget(0, 0, 0);
semget(0, 0, 0);
], [
AC_DEFINE(HAVE_SHMEM_SERVICES)
my_shmem=\${SOURCES_SHMEM}
AC_MSG_RESULT("yes")
], AC_MSG_RESULT("no") )

AC_SUBST(my_shmem)

# -------------------------------------------------------------------------
# some systems define flock_t, for others we have to define it ourselves
# -------------------------------------------------------------------------

AC_MSG_CHECKING("do we have flock_t defined in sys/fcntl.h")
AC_TRY_COMPILE([#include <sys/fcntl.h>
], [
flock_t filler;
], [
AC_DEFINE(HAVE_FLOCK_T)
AC_MSG_RESULT("yes") 
], AC_MSG_RESULT("no") )

if test "$HAVE_FLOCK_T" != 1; then
   AC_MSG_CHECKING("do we have flock_t defined in sys/flock.h")
   AC_TRY_COMPILE([#include <sys/flock.h>
   ], [
   flock_t filler;
   ], [
   AC_DEFINE(HAVE_FLOCK_T)
   AC_MSG_RESULT("yes") 
   ], AC_MSG_RESULT("no") )
fi

# -------------------------------------------------------------------------
# there are some idiosyncrasies with semun defs (used in semxxx). Solaris
# does not define it at all
# -------------------------------------------------------------------------

AC_MSG_CHECKING("do we have union semun defined")
AC_TRY_COMPILE(
[#include <sys/ipc.h>
#include <sys/shm.h>
#include <sys/sem.h>
], [
union semun filler;
], [
AC_DEFINE(HAVE_UNION_SEMUN)   
AC_MSG_RESULT("yes")
], AC_MSG_RESULT("no") )

# ==================== END OF SHARED MEMORY DRIVER SECTION ================
# ================= test for the unix networking functions ================

#--------------------------------------------------------------------
#	Check for the existence of the -lsocket and -lnsl libraries.
#	The order here is important, so that they end up in the right
#	order in the command line generated by make.  Here are some
#	special considerations:
#	1. Use "connect" and "accept" to check for -lsocket, and
#	   "gethostbyname" to check for -lnsl.
#	2. Use each function name only once:  can't redo a check because
#	   autoconf caches the results of the last check and won't redo it.
#	3. Use -lnsl and -lsocket only if they supply procedures that
#	   aren't already present in the normal libraries.  This is because
#	   IRIX 5.2 has libraries, but they aren't needed and they're
#	   bogus:  they goof up name resolution if used.
#	4. On some SVR4 systems, can't use -lsocket without -lnsl too.
#	   To get around this problem, check for both libraries together
#	   if -lsocket doesn't work by itself.
#--------------------------------------------------------------------
cfitsio_checkBoth=0
AC_CHECK_FUNC(connect, cfitsio_checkSocket=0, cfitsio_checkSocket=1)
if test "$cfitsio_checkSocket" = 1; then
    AC_CHECK_LIB(socket, main, LIBS="$LIBS -lsocket", cfitsio_checkBoth=1)
fi
if test "$cfitsio_checkBoth" = 1; then
    tk_oldLibs=$LIBS
    LIBS="$LIBS -lsocket -lnsl"
    AC_CHECK_FUNC(accept, cfitsio_checkNsl=0, [LIBS=$tk_oldLibs])
fi
AC_CHECK_FUNC(gethostbyname, , AC_CHECK_LIB(nsl, main, [LIBS="$LIBS -lnsl"]))

AC_DEFINE(HAVE_NET_SERVICES)

# ==================== END OF unix networking SECTION ================
AM_CONDITIONAL(F77BUILD, test x$F77WRAPPERS )
AC_CHECK_LIB(m, cos, [LIBS="$LIBS -lm"])
AC_CONFIG_FILES([Makefile])
AC_OUTPUT