#
# configure.in for cfitsio
#
# /redshift/sgi6/lheavc/ftools/cfitsio/configure.in,v 3.4 1996/07/26 20:27:53 pence Exp
#
#  copied from host and modified
#

dnl Process this file with autoconf to produce a configure script.
AC_INIT
AC_CONFIG_SRCDIR([fitscore.c])

#--------------------------------------------------------------------
# Command options
#--------------------------------------------------------------------

AC_ARG_ENABLE(
  reentrant,
  [AS_HELP_STRING([--enable-reentrant],[Enable reentrant multithreading])],
  [ if test $enableval = yes; then BUILD_REENTRANT=yes; fi ]
)

SSE_FLAGS=""
AC_ARG_ENABLE(
  sse2,
  [AS_HELP_STRING([--enable-sse2],[Enable use of instructions in the SSE2 extended instruction set])],
  [ if test $enableval = yes; then SSE_FLAGS="-msse2"; fi ]
)

AC_ARG_ENABLE(
  ssse3,
  [AS_HELP_STRING([--enable-ssse3],[Enable use of instructions in the SSSE3 extended instruction set])],
  [ if test $enableval = yes; then SSE_FLAGS="$SSE_FLAGS -mssse3"; fi ]
)

# Define BUILD_HERA when building for HERA project to activate code in
# drvrfile.c (by way of fitsio2.h):
AC_ARG_ENABLE(
  hera,
  [AS_HELP_STRING([--enable-hera],[Build for HERA (ASD use only)])],
  [ if test $enableval = yes; then BUILD_HERA=yes; fi ]
)
if test "x$BUILD_HERA" = xyes; then
  AC_DEFINE(BUILD_HERA)
fi

AC_ARG_WITH(
  gsiftp-flavour,
  [AS_HELP_STRING([--with-gsiftp-flavour[[=PATH]]],[Enable Globus Toolkit gsiftp protocol support])],
  [ if test "x$withval" != "xno"; then

        if test "x$withval" != "xyes" ; then
            GSIFTP_FLAVOUR=${withval}
        fi
        AC_DEFINE(GSIFTP_FLAVOUR,1,[Define Globus Toolkit architecture])
    fi
  ]
)

AC_ARG_WITH(
  gsiftp,
  [AS_HELP_STRING([--with-gsiftp[[=PATH]]],[Enable Globus Toolkit gsiftp protocol support])],
  [ if test "x$withval" != "xno"; then

        if test "x$withval" != "xyes" ; then
            CFLAGS="$CFLAGS -I${withval}/include/${GSIFTP_FLAVOUR}"
            LDFLAGS="$LDFLAGS -L${withval}/lib -lglobus_ftp_client_${GSIFTP_FLAVOUR}"
            HAVE_GSIFTP=yes
        fi
        AC_DEFINE(HAVE_GSIFTP,1,[Define if you want Globus Toolkit gsiftp protocol support])
    fi
  ]
)

#--------------------------------------------------------------------
# Check for install location prefix
#--------------------------------------------------------------------

AC_PREFIX_DEFAULT(`pwd`)

# make will complain about duplicate targets for the install directories
# if prefix == exec_prefix
AC_SUBST(INSTALL_ROOT,'${prefix}')
test "$exec_prefix" != NONE -a "$prefix" != "$exec_prefix" \
  && INSTALL_ROOT="$INSTALL_ROOT "'${exec_prefix}'
	

#--------------------------------------------------------------------
# Check "uname" to determine system type
#--------------------------------------------------------------------
AC_CHECK_PROG([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


dnl Checks for programs.

# Try first to find a proprietary C compiler, then gcc
if test "x$CC" = x; then
  AC_CHECK_PROGS(CC, cc)
fi
AC_PROG_CC

if test "x$FC" = "xnone" ; then
  AC_MSG_NOTICE(cfitsio: == Fortran compiler search has been overridden)
  AC_MSG_NOTICE(cfitsio: == Cfitsio will be built without Fortran wrapper support)
  FC=
  F77_WRAPPERS=
else
  AC_CHECK_PROGS(FC, gfortran g95 g77 f77 ifort f95 f90 xlf cf77 gf77 af77 ncf f2c, notfound)
  if test $FC = 'notfound' ; then
    AC_MSG_WARN(cfitsio: == No acceptable Fortran compiler found in \$PATH)
    AC_MSG_NOTICE(cfitsio: == Adding wrapper support for GNU Fortran by default)
    CFORTRANFLAGS="-Dg77Fortran"
    F77_WRAPPERS="\${FITSIO_SRC}"
  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
fi

AC_PROG_RANLIB

dnl Checks for ANSI stdlib.h.
AC_CHECK_HEADERS(stdlib.h string.h math.h limits.h ,ANSI_HEADER=yes,ANSI_HEADER=no)dnl

dnl Check if prototyping is allowed.
AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[]], [[void d( int , double) ]])],[PROTO=yes],[PROTO=no])dnl

if test $ANSI_HEADER = no -o $PROTO = no; then
     echo "   *********** WARNING: CFITSIO CONFIGURE FAILURE ************  "
     echo "cfitsio: ANSI C environment NOT found. Aborting cfitsio configure."
     if test $ANSI_HEADER = no; then 
        echo "cfitsio: You're missing a needed ANSI header file."
     fi
     if test $PROTO = no; then
        echo "cfitsio: Your compiler can't do ANSI function prototypes."
     fi
     echo "cfitsio: You need an ANSI C compiler and all ANSI trappings"
     echo "cfitsio: to build cfitsio.   "
     echo "     *******************************************************  "
     exit 0;
fi

dnl Check if C compiler supports sse extended instruction flags.
if test "x$SSE_FLAGS" != x; then
    SAVE_CFLAGS="$CFLAGS"
    CFLAGS="$CFLAGS $SSE_FLAGS"
    AC_MSG_CHECKING([whether $CC accepts $SSE_FLAGS])
    AC_LANG_PUSH([C])
    AC_COMPILE_IFELSE([AC_LANG_PROGRAM([])],[c_has_option=yes],[c_has_option=no])
    AC_MSG_RESULT($c_has_option)
    AC_LANG_POP([])
    if test "$c_has_option" = no; then SSE_FLAGS=""; fi
    CFLAGS="$SAVE_CFLAGS"
fi
AC_SUBST(SSE_FLAGS)

CFLAGS="$CFLAGS"
LIBPRE=""

case $system in
    Darwin-*)
        # Build for i386 & x86_64 architectures on Darwin 10.x or newer:
        changequote(,)
        case $system in
            Darwin-[56789]*)
                ;;
            *)
                changequote([,])
                # Test to see whether the C compiler accepts the "-arch"
                # flags for building "universal" binaries (Apple XCode only):
                SAVE_CFLAGS="$CFLAGS"
                C_UNIV_SWITCH="-arch i386 -arch x86_64"
                CFLAGS="$CFLAGS $C_UNIV_SWITCH"
                AC_MSG_CHECKING([whether $CC accepts $C_UNIV_SWITCH])
                AC_LANG_PUSH([C])
                AC_COMPILE_IFELSE([AC_LANG_PROGRAM([])],[c_has_option=yes],[c_has_option=no])
                AC_MSG_RESULT($c_has_option)
                AC_LANG_POP([])
                # Value of C_UNIV_SWITCH will be needed later for SHLIB_LD:
                if test "$c_has_option" = no; then C_UNIV_SWITCH=""; fi
                CFLAGS="$SAVE_CFLAGS $C_UNIV_SWITCH"
                ;;
        esac
        # Darwin can be powerpc, i386, or x86_64
	ARCH=`uname -p`
	EXT="darwin"
        # For large file support (but may break Absoft compilers):
        AC_DEFINE(_LARGEFILE_SOURCE)
        AC_DEFINE(_FILE_OFFSET_BITS,64)
	;;
    SunOS-4*)
	ARCH="sun"
	EXT="sun"
	;;
    HP-UX-*)
	ARCH="hp"
	EXT="hpu"
	if test "x$CFORTRANFLAGS" = x ; then
		CFORTRANFLAGS="-Dappendus"
	fi
	CFLAGS="$CFLAGS -DPG_PPU" 
	LIBPRE="-Wl,"
	;;
    SunOS-5*)
	ARCH="solaris"
	EXT="sol"
	if test "x$CFORTRANFLAGS" = x ; then
		CFORTRANFLAGS="-Dsolaris"
	fi
        # We need libm on Solaris:
        AC_CHECK_LIB(m, frexp)
        # For large file support:
        AC_DEFINE(_LARGEFILE_SOURCE)
        AC_DEFINE(_FILE_OFFSET_BITS,64)
	;;
    OSF1*)
	ARCH="alpha"
	EXT="osf"
	;;
    IRIX*)
	ARCH="sgi"
	EXT="sgi"
	CFLAGS="$CFLAGS -DHAVE_POSIX_SIGNALS"
	RANLIB="touch"
	;;
    ULTRIX*)
	ARCH="dec"
	EXT="dec"
	;;
    Linux*)
	ARCH="linux"
	EXT="lnx"
        # For large file support:
        AC_DEFINE(_LARGEFILE_SOURCE)
        AC_DEFINE(_FILE_OFFSET_BITS,64)
	;;
    FREEBSD*|FreeBSD*)
	ARCH="linux"
	EXT="lnx"
	;;
    CYGWIN*)
	ARCH="cygwin"
	EXT="cygwin"
	CFLAGS="$CFLAGS -DHAVE_POSIX_SIGNALS"
	;;
    *)
		echo "cfitsio: == Don't know what do do with $system"
	;;
esac

CFLAGS="$CFLAGS $CFORTRANFLAGS"

case $GCC in
	yes)
		GCCVERSION="`$CC -dumpversion 2>&1`"
		echo "cfitsio: == Using gcc version $GCCVERSION"
		AC_SUBST(GCCVERSION)
                changequote(,)
		gcc_test=`echo $GCCVERSION | grep -c '2\.[45678]'`
		changequote([,])
		if test $gcc_test -gt 0
		then
		    changequote(,)
		    CFLAGS=`echo $CFLAGS | sed 's:-O[^ ]* *::'`
		    changequote([,])
		    AC_MSG_WARN(This gcc is pretty old. Disabling optimization to be safe.)
		fi
		;;
	no)
		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
		
# Shared library section
#-------------------------------------------------------------------------------
SHLIB_LD=:
SHLIB_SUFFIX=".so"
lhea_shlib_cflags=
case $EXT in
  cygwin)
    SHLIB_LD="$CC -shared"
    SHLIB_SUFFIX=".dll"
    ;;
  darwin)
    changequote(,)
    case $system in
        Darwin-[56789]*)
            SHLIB_LD="$CC -dynamiclib"
            ;;
        *)
            # Build for i386 & x86_64 architectures on Darwin 10.x or newer:
            SHLIB_LD="$CC -dynamiclib $C_UNIV_SWITCH" 
            ;;
    esac
    changequote([,])
    SHLIB_SUFFIX=".dylib"
    lhea_shlib_cflags="-fPIC -fno-common"
    ;;
  hpu)
    SHLIB_LD="ld -b" 
    SHLIB_SUFFIX=".sl"
    ;;
  lnx)
    SHLIB_LD=":"
    ;;
  osf)
    SHLIB_LD="ld -shared -expect_unresolved '*'"
    LD_FLAGS="-taso"
    ;;
  sol)
    SHLIB_LD="/usr/ccs/bin/ld -G"
    lhea_shlib_cflags="-KPIC"
    ;;
  sgi)
    SHLIB_LD="ld -shared -rdata_shared"
    ;;
  *)
    AC_MSG_WARN(Unable to determine how to make a shared library)
    ;;
esac
# Darwin uses gcc (=cc), but needs different flags (see above)
# if test "x$GCC" = xyes; then
if test "x$GCC" = xyes && test "x$EXT" != xdarwin && test "x$EXT" != xcygwin; then
  SHLIB_LD="$CC -shared"
  lhea_shlib_cflags='-fPIC'
fi
if test "x$lhea_shlib_cflags" != x; then
  CFLAGS="$CFLAGS $lhea_shlib_cflags"
fi

AC_SUBST(ARCH)dnl
AC_SUBST(CFLAGS)dnl
AC_SUBST(CC)dnl
AC_SUBST(FC)dnl
AC_SUBST(LIBPRE)dnl
AC_SUBST(SHLIB_LD)dnl
AC_SUBST(SHLIB_SUFFIX)dnl
AC_SUBST(F77_WRAPPERS)

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

AC_MSG_CHECKING("whether ftruncate works")
AC_LINK_IFELSE([AC_LANG_PROGRAM([[#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_COMPILE_IFELSE([AC_LANG_PROGRAM([[#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_LINK_IFELSE([AC_LANG_PROGRAM([[#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_COMPILE_IFELSE([AC_LANG_PROGRAM([[#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_COMPILE_IFELSE([AC_LANG_PROGRAM([[#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_COMPILE_IFELSE([AC_LANG_PROGRAM([[#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 ================

AC_SEARCH_LIBS([gethostbyname], [nsl], cfitsio_have_nsl=1, cfitsio_have_nsl=0)
AC_SEARCH_LIBS([connect], [socket], cfitsio_have_socket=1,
               cfitsio_have_socket=0, [-lnsl])

if test "$cfitsio_have_nsl" = 1 -a "$cfitsio_have_socket" = 1; then
   AC_DEFINE(HAVE_NET_SERVICES)
fi

# ==================== END OF unix networking SECTION ================

# ------------------------------------------------------------------------------
# Define _REENTRANT & add -lpthread to LIBS if reentrant multithreading enabled:
# ------------------------------------------------------------------------------
if test "x$BUILD_REENTRANT" = xyes; then
  AC_DEFINE(_REENTRANT)
  AC_CHECK_LIB([pthread],[main],[],[AC_MSG_ERROR(Unable to locate pthread library needed when enabling reentrant multithreading)])
fi
# ------------------------------------------------------------------------------

AC_CONFIG_FILES([Makefile])
AC_OUTPUT
AC_CONFIG_FILES([cfitsio.pc])
AC_OUTPUT


AC_MSG_RESULT([])
AC_MSG_RESULT([    Congratulations, Makefile update was successful.])
AC_MSG_RESULT([    You may want to run \"make\" now.])
AC_MSG_RESULT([])

