# Process this file with autoconf to produce a configure script.
AC_INIT(meepPP, 0.01, meep++@glenstark.net)
AC_CONFIG_SRCDIR(src/step.cpp)

# Shared-library version number; indicates api compatibility, and is
# not the same as the "public" version number.  (Don't worry about this
# except for public releases.)
SHARED_VERSION_INFO="1:0:0"

AM_INIT_AUTOMAKE
AM_CONFIG_HEADER(config.h)
AM_MAINTAINER_MODE
AC_SUBST(SHARED_VERSION_INFO)
AM_ENABLE_SHARED(no) dnl shared libs cause too many headaches to be default

MEEP_SUFFIX=""

##############################################################################

AC_ARG_WITH(doc,
	[AC_HELP_STRING([--with-doc], [include old documentation in dist])],
	with_doc=$withval,with_doc=no)

AM_CONDITIONAL(WITH_DOC, test "x$with_doc" = xyes)

##############################################################################

# Check for mpiCC immediately after getting C++ compiler...
AC_PROG_CXX

# Check for MPI library

AC_ARG_WITH(mpi, [AC_HELP_STRING([--with-mpi],[enable MPI parallelization])],
                  with_mpi=$withval, with_mpi=no)

#if test "x$with_mpi" = "xyes"; then
#	AC_LANG_PUSH([C++])
#	ACX_MPI([],AC_MSG_ERROR([could not find mpi library for --with-mpi]))
#	CXX=$MPICXX
#	AC_LANG_POP([C++])
#	MEEP_SUFFIX="${MEEP_SUFFIX}_mpi"
#fi

##############################################################################
# More checks

AC_PROG_LIBTOOL

AC_CHECK_PROG(LATEX2HTML, latex2html, latex2html,[latex2html not found])
#if test -z "$LATEX2HTML"; then
#    AC_MSG_WARN([Cannot find latex2html in your path!])
    # FIXME: use standard 'missing' script from automake
#    LATEX2HTML='echo not running latex2html...'
#fi
AC_SUBST(LATEX2HTML)

AC_CHECK_LIB(m, sin)

AC_CHECK_LIB(fftw3,fftw_plan_dft_1d,,
       AC_MSG_ERROR([Missing FFTW library]))

###########################################################################
# Harminv library

# First, try pkg-config, if it is installed.  Note that, annoyingly,
# pkg-config doesn't look in /usr/local by default, so we have to
# add this to the path for that common case.  It also doesn't give
# us a way to print its default path, grr, so we have to assume that this
# is /usr/lib/pkgconfig.
#TODO ALWAYS RETURNING TRUE HERE!
#PKG_CONFIG_PATH=$PKG_CONFIG_PATH:/usr/lib/pkgconfig:/usr/local/lib/pkgconfig
#export PKG_CONFIG_PATH
#PKG_CHECK_MODULES(HARMINV, harminv >= 1.1, [CFLAGS="$CFLAGS $HARMINV_CFLAGS"; LIBS="$HARMINV_LIBS $LIBS"; have_harminv=yes], [have_harminv=yes])

# As a fallback, check manually for BLAS/LAPACK and harminv libraries:
#if test $have_harminv = no; then
#	AC_F77_WRAPPERS
#	ACX_BLAS
#	ACX_LAPACK([], AC_MSG_WARN([BLAS/LAPACK needed for harminv]))

#        save_CC=$CC
#	CC=$CXX # harminv test must use $CXX since harminv may be a C++ lib

	# just use lapack/blas in default libs since we always need them
	AC_CHECK_LIB(harminv, harminv_get_freq_error, [have_harminv=yes; LIBS="-lharminv $LAPACK_LIBS $BLAS_LIBS $LIBS $FLIBS"], [AC_MSG_WARN([harminv support is disabled])], [$LAPACK_LIBS $BLAS_LIBS $FLIBS])

	CC=$save_CC
#fi

if test $have_harminv = yes; then
	AC_DEFINE([HAVE_HARMINV],[1],[Define if you have libharminv])
fi

##############################################################################
# GNU Scientific Library

AC_CHECK_FUNC(cblas_cgemm, [], [AC_CHECK_LIB(gslcblas, cblas_cgemm)])

#AC_CHECK_LIB(gsl, gsl_sf_bessel_Jn,,
#	[AC_MSG_WARN([Missing GNU GSL library...Bessel-function field initialization will not be supported.])])

##############################################################################
# Check for HDF5 library
#AC_ARG_WITH(hdf5, [AC_HELP_STRING([--without-hdf5],[do not allow HDF5 output])], ok=$withval, ok=yes)
#if test "$ok" = "yes"; then
#	AC_CHECK_LIB(z,deflate, [],[AC_MSG_WARN([zlib is required for HDF5!])])

#	save_CC=$CC
#	if test "x$with_mpi" = "xyes"; then
#	   CC=$MPICXX
#	fi
#	save_LIBS_0="$LIBS" # save, to check later if we found any library
#	AC_CHECK_LIB(hdf5, H5Pcreate, [
#		AC_CHECK_HEADERS(hdf5.h, [LIBS="-lhdf5 $LIBS"
#                     AC_DEFINE(HAVE_HDF5,1,[Define if we have & link HDF5])])])
#	if test x"$save_LIBS_0" = x"$LIBS"; then
#		AC_MSG_WARN([Couldn't find the HDF5 library!!  Switching to --without-hdf5.])
#	fi
#	CC=$save_CC#
#
#        if test "x$with_mpi" = "xyes"; then
#		AC_CHECK_FUNCS(H5Pset_mpi H5Pset_fapl_mpio)
#	fi
#fi

##############################################################################
# Figure out the number of processors so we can quickly build the docs and
# run the tests...  (FIXME: use more standard autoconf macros)

RUNCODE=""

if test "x$with_mpi" = "xyes"; then
        cat > test_num_processors.c <<MYEOF
#include <unistd.h>
#include <stdio.h>
#include <stdlib.h>

int main() {
  long nprocs;
  nprocs = sysconf(_SC_NPROCESSORS_ONLN);
  if (nprocs < 1)
    nprocs = 1;
  printf ("%ld\n",nprocs);
  exit (EXIT_SUCCESS);
}
MYEOF
        $CC -o test_num_processors test_num_processors.c
        NUMPROCS=`./test_num_processors`
        rm -f test_num_processors test_num_processors.c
        echo Looks like we have got "$NUMPROCS" processors

        RUNCODE="mpirun -np $NUMPROCS"
fi

AC_SUBST(RUNCODE)

##############################################################################
# Compiler flags

AC_ARG_ENABLE(debug, [AC_HELP_STRING([--enable-debug,compile for debugging])],
	      enable_debug=$enableval, enable_debug=no)
if test "$enable_debug" = "yes"; then
	CFLAGS="-g"
	CXXFLAGS="-g"
	FFLAGS="-g"
	AC_DEFINE(DEBUG,1,[define to enable debugging code])
fi
#else
  # Pick "good" compiler flags(?)
#  AX_CXX_MAXOPT
#fi

# Add lots of compiler warnings in maintainer mode if we are using gcc:
# (The variable $GXX is set to "yes" by AC_PROG_CXX if we are using g++.)
if test "$GXX" = "yes" && test "$USE_MAINTAINER_MODE" = yes; then
        CXXFLAGS="$CXXFLAGS -Wall -W"
fi

##############################################################################
# Libraries and flags (other than -lmeep) required to link Meep:

MEEPLIBS="$LDFLAGS $LIBS"
AC_SUBST(MEEPLIBS)


##############################################################################
# Miscellaneous function and header checks

#AC_HEADER_TIME
#AC_CHECK_HEADERS([sys/time.h])
#AC_CHECK_FUNCS([BSDgettimeofday gettimeofday cblas_ddot cblas_daxpy])

##############################################################################

AC_SUBST(MEEP_SUFFIX)
program_transform_name="s,_,-,g;$program_transform_name"

##############################################################################

AC_CONFIG_FILES([ po/Makefile.in
	Makefile
	meep.pc
	src/Makefile
])

AC_OUTPUT