dnl Process this file with autoconf to produce a configure script.
AC_INIT(rotgen.f)

AC_ARG_WITH(g77,
[  --with-g77              use G77 to compile
  --without-g77           use the default f77 to compile])

AC_ARG_WITH(ccp4-prefix,
  AC_HELP_STRING( [--with-ccp4-prefix=PFX], [ set ccp4 libraries prefix] ),     
  [if test "x${withval}" != xyes; then
   ccp4_prefix=$withval 
   else
AC_MSG_ERROR([incorrect use of --with-ccp4-prefix])
   fi ],  
   ccp4_prefix="" 
   )

AC_CANONICAL_SYSTEM

AM_INIT_AUTOMAKE(rotgen, 3.1)
AM_MAINTAINER_MODE

case ${with_g77} in
  "yes" ) CC="gcc" GCC=yes F77=g77 ;;
  "no"  ) : ${CC=cc}
          F77=f77 ;;
esac

AC_PROG_F77
AC_PROG_CXX

AC_PROG_INSTALL

AC_PATH_X
AC_PATH_XTRA

X_PRE_LIBS="-lXt -lX11 $X_PRE_LIBS"

AC_PROG_CXX
AC_CXX_LIBRARY_LDFLAGS

AC_LANG_FORTRAN77
dnl try to identify the fortran name mangling
_AC_F77_NAME_MANGLING
dnl The alternatives in the cases here could be left over from a previous
dnl config.cache -- autoconf changed.
echo "$ac_cv_f77_mangling"--
case "$ac_cv_f77_mangling" in
  "upper case, no underscore, no extra underscore" | \
  "upper case, no underscores")
    AC_DEFINE(LINKTYP, 2) ;;
  "lower case, no underscore, no extra underscore" | \
  "lower case, no underscores" )
    AC_DEFINE(LINKTYP, 3) ;;
  "lower case, underscore, no extra underscore" | \
  "lower case, single underscores")
    AC_DEFINE(LINKTYP, 1) ;;
  "lower case, underscore, extra underscore" | \
  "lower case, double underscores")
    AC_DEFINE(LINKTYP, 1)
    # We aren't set up for f2c-style double underscoring.
    if test "$G77" = yes; then
      AC_MSG_WARN([
*** You need to use option -fno-second-underscore with g77
*** to compile Fortran to link with xdl_view.
])
      FFLAGS="-fno-second-underscore $FFLAGS"     
    else
      AC_MSG_WARN([
*** Your Fortran compiler looks like f2c.
*** You can't currently link xdl_view routines with Fortran compiled with it.
*** You could use g77 with option `'-fno-second-underscore' instead.])     
    fi ;;       
  *)     
    AC_MSG_ERROR([Unknown sort of Fortran name mangling]) ;;
esac

case $target in
  *linux* )
  case $F77 in
    *ifc | *efc ) LDFLAGS="$LDFLAGS -Vaxlib" 
  esac
esac

test "$CLIB" && LDFLAGS="$LDFLAGS -L$CLIB"
test "${with_ccp4_prefix+set}" = set && LDFLAGS="$LDFLAGS -L$ccp4_prefix/lib"

AC_LANG_PUSH(C)
AC_CHECK_LIB(m,sqrt)
AC_LANG_POP(C)

CCP4_CHECK_LIB
CCP4_CHECK_XDL_VIEW
JWC_CHECK_FLIB

AS_IF( [test $ac_cv_lib_ccp4f_qisnan != yes || test $ac_cv_lib_xdl_view_xdlf_open_view != yes || test $ac_cv_lib_jwc_f_kdmstr != yes ],
  AS_IF( [ test "${with_ccp4_prefix+set}" = set ], [
  test $ac_cv_lib_ccp4f_qisnan != yes && LIBS="-lccp4f -lccp4c -lmmdb2 $LIBS" && LDFLAGS="$LDFLAGS -L$ccp4_prefix/src"
  test $ac_cv_lib_jwc_f_kdmstr != yes && LIBS="-ljwc_f -ljwc_c $LIBS"
  test $ac_cv_lib_xdl_view_xdlf_open_view != yes && LIBS="-lxdl_view -lxdl_viewextra $LIBS"    
  ],
  AC_MSG_ERROR([missing necessary libraries]) )
 , )

AC_SUBST(rotgen_LDFLAGS)
 
AC_OUTPUT(Makefile)