#############################################################################
#
# MODULE:   	Grass Compilation
# AUTHOR(S):	Original author unknown - probably CERL
#   	    	Eric G. Miller - egm2 jps.net
#   	    	Justin Hickey - Thailand - jhickey hpcc.nectec.or.th
#		Markus Neteler - Germany/Italy - neteler itc.it
# PURPOSE:  	This configure runs all the tests to determine what components
#   	    	are installed on the current system. It also defines certain
#   	    	configuration variables for compilation and installation.
# COPYRIGHT:    (C) 2000-2009, 2011-2012 by the GRASS Development Team
#
#               This program is free software under the GNU General
#   	    	Public License (>=v2). Read the file COPYING that
#   	    	comes with GRASS for details.
#
# MANUAL:       http://www.gnu.org/software/autoconf/manual/autoconf.html
#               http://savannah.gnu.org/projects/autoconf/
# Website for   config.guess, config.sub:
#               wget http://git.savannah.gnu.org/cgit/config.git/plain/config.guess
#               wget http://git.savannah.gnu.org/cgit/config.git/plain/config.sub
#               Note: use autoconf-2.13
#############################################################################

define([AC_CACHE_LOAD], )
define([AC_CACHE_SAVE], )
define([AC_CACHE_VAL], [
$2
])

AC_INIT(configure.in)
AC_PREREQ(2.13)
AC_PREFIX_DEFAULT(/usr/local)
AC_CONFIG_HEADER(include/config.h)
AC_CANONICAL_HOST
AC_PROG_CC
LOC_EXEEXT
AC_SUBST(MINGW32)

# Check for full floating-point support, including Infinity and NaN
IEEEFLAG=
LOC_CHECK_FP_INF_NAN([],
[],
[ ac_save_cflags=${CFLAGS}
  CFLAGS=-mieee
  LOC_CHECK_FP_INF_NAN([ with -mieee],
    [IEEEFLAG="-mieee"],
    [AC_MSG_WARN([*** Incomplete floating-point support.])],
    [AC_MSG_ERROR([*** INTERNAL CONFIGURE ERROR])])
  CFLAGS=${ac_save_cflags}],
[ LOC_CHECK_CC_MIEEE ])
CFLAGS="$CFLAGS $IEEEFLAG"

# Set BINDIR

if test -n "${bindir}"; then
BINDIR="${bindir}"
else
BINDIR=/usr/local/bin
fi
AC_SUBST(BINDIR)

# Set SRCDIR and DSTDIR

AC_PATH_PROG(pwd, pwd, pwd)

if test "$MINGW32" = yes ; then
  winpwd="pwd -W"
else
  winpwd="$pwd"
fi

AC_MSG_CHECKING(for source directory)

if test -z "$srcdir" ; then
  SRCDIR=`$pwd`
else
  SRCDIR=`(cd "$srcdir" ; $pwd)`
fi

AC_MSG_RESULT("$SRCDIR")

AC_MSG_CHECKING(for build directory)

DSTDIR=`$pwd`
WINDSTDIR=`$winpwd`

AC_MSG_RESULT("$DSTDIR")

AC_SUBST(SRCDIR)
AC_SUBST(DSTDIR)

# Set ARCH

ARCH=
if test -z "${host}"; then
ARCH="unknown"
else
ARCH="${host}"
fi

AC_SUBST(ARCH)

# Use absolute path for aux directory so that install-sh works

AC_CONFIG_AUX_DIR("$SRCDIR")

# Set GISBASE and GRASS_BIN

GISBASE="${WINDSTDIR}/dist.${ARCH}"
GRASS_BIN="${DSTDIR}/bin.${ARCH}"

AC_SUBST(GISBASE)
AC_SUBST(GRASS_BIN)

# Set GRASS_VERSION_*

GRASS_VERSION_FILE=include/VERSION
GRASS_VERSION_MAJOR=`sed -n 1p "${GRASS_VERSION_FILE}"`
GRASS_VERSION_MINOR=`sed -n 2p "${GRASS_VERSION_FILE}"`
GRASS_VERSION_RELEASE=`sed -n 3p "${GRASS_VERSION_FILE}"`
GRASS_VERSION_DATE=`sed -n 4p "${GRASS_VERSION_FILE}"`
GRASS_VERSION_NUMBER=`echo ${GRASS_VERSION_MAJOR}.${GRASS_VERSION_MINOR}.${GRASS_VERSION_RELEASE}`
NAME_VER=`echo ${GRASS_VERSION_NUMBER} | sed 's/\..*//'`
changequote(,)
LIB_VER=`echo ${GRASS_VERSION_NUMBER} | sed 's/^\([0-9.]*\).*$/\1/'`
changequote([,])

GRASS_VERSION_SVN="exported"
AC_PATH_PROG(SVN_VERSION, svnversion, no)
if test "$SVN_VERSION" != "no" ; then
   GRASS_VERSION_SVN=`$SVN_VERSION -c | cut -f2 -d:`
   if test "$GRASS_VERSION_SVN" = "exported" -o "$GRASS_VERSION_SVN" = "Unversioned directory" ; then
      GRASS_VERSION_SVN="exported"
   else
      GRASS_VERSION_SVN="r$GRASS_VERSION_SVN"
   fi
fi

AC_SUBST(GRASS_VERSION_FILE)
AC_SUBST(GRASS_VERSION_MAJOR)
AC_SUBST(GRASS_VERSION_MINOR)
AC_SUBST(GRASS_VERSION_RELEASE)
AC_SUBST(GRASS_VERSION_NUMBER)
AC_SUBST(GRASS_VERSION_DATE)
AC_SUBST(GRASS_VERSION_SVN)
AC_SUBST(NAME_VER)
AC_SUBST(LIB_VER)

# Check for MacOSX App

AC_ARG_ENABLE(macosx-app,
[  --enable-macosx-app     create a MacOSX application],,
[enable_macosx_app=no])

AC_MSG_CHECKING(for MacOSX App)
case "$enable_macosx_app" in
	yes)	MACOSX_APP=1	;;
	no)	MACOSX_APP=	;;
	*)	AC_MSG_ERROR([*** You must answer yes or no.])	;;
esac
AC_MSG_RESULT("$enable_macosx_app")
AC_SUBST(MACOSX_APP)

# Check for MacOSX archs

AC_MSG_CHECKING(for MacOSX architectures)

MACOSX_ARCHS=

if test -z "$with_macosx_archs" ; then
  AC_MSG_RESULT(no)
else
  for a in $with_macosx_archs
  do
    # check if valid arch?
    case "$a" in
      i386|ppc|x86_64|ppc64)
        MACOSX_ARCHS="$MACOSX_ARCHS -arch $a"
        ;;
    esac
  done
  AC_MSG_RESULT([$MACOSX_ARCHS])
  LDFLAGS="$LDFLAGS $MACOSX_ARCHS"
  CFLAGS="$CFLAGS $MACOSX_ARCHS"
  CXXFLAGS="$CXXFLAGS $MACOSX_ARCHS"
fi

AC_SUBST(MACOSX_ARCHS)

# Done checking MacOSX archs

# Check for MacOSX SDK

AC_MSG_CHECKING(for MacOSX SDK)

MACOSX_SDK=

if test -z "$with_macosx_sdk" ; then
  AC_MSG_RESULT(no)
else
  AC_CHECK_FILE($with_macosx_sdk/SDKSettings.plist, [
    MACOSX_SDK="-isysroot $with_macosx_sdk"],[
    AC_MSG_ERROR([*** specified SDK does not exist or is not a SDK])])
  LDFLAGS="$LDFLAGS $MACOSX_SDK"
  CFLAGS="$CFLAGS $MACOSX_SDK"
  CXXFLAGS="$CXXFLAGS $MACOSX_SDK"
fi

AC_SUBST(MACOSX_SDK)

# Done checking MacOSX SDK

# Set INST_DIR

if test -n "$MACOSX_APP" ; then
    INSTDIR='${prefix}'"/GRASS-${GRASS_VERSION_MAJOR}.${GRASS_VERSION_MINOR}.app/Contents/MacOS"
else
    INSTDIR='${prefix}'"/grass${GRASS_VERSION_MAJOR}${GRASS_VERSION_MINOR}"
fi

AC_SUBST(INSTDIR)

# Get flags for building shared libraries

SC_ENABLE_SHARED

ac_save_ldflags="$LDFLAGS"
SC_CONFIG_CFLAGS
LDFLAGS="${ac_save_ldflags} $LDFLAGS"

# Enable options

AC_ARG_ENABLE(w11,
[  --enable-w11            use W11 library for Windows X11 emulation],,
[enable_w11=no])

# With options

LOC_ARG_WITH(cxx, C++)
#LOC_ARG_WITH(g77, GNU Fortran 77, no)

AC_ARG_WITH(macosx-archs,
[  --with-macosx-archs[=arch list]
                          compile multiple architectures on MacOSX, ie.
                          universal.  Valid architectures are i386, ppc,
                          x86_64 and ppc64. (default: no [native])],, with_macosx_archs="no")
AC_ARG_WITH(macosx-sdk,
[  --with-macosx-sdk[=path/sdk]
                          compile with a system SDK on MacOSX. (default: no)],, with_macosx_sdk="no")
LOC_ARG_WITH(tiff, TIFF)
LOC_ARG_WITH(png, PNG)
LOC_ARG_WITH(postgres, PostgreSQL, no)
LOC_ARG_WITH(mysql, MySQL, no)
LOC_ARG_WITH(sqlite, SQLite)
LOC_ARG_WITH(opengl, OpenGL)
LOC_ARG_WITH(odbc, ODBC, no)
LOC_ARG_WITH(fftw, FFTW)
LOC_ARG_WITH(blas, BLAS, no)
LOC_ARG_WITH(lapack, LAPACK, no)
LOC_ARG_WITH(cairo, Cairo)
LOC_ARG_WITH(freetype, FreeType)
LOC_ARG_WITH(nls, NLS, no)
LOC_ARG_WITH(readline, Readline, no)
LOC_ARG_WITH(opendwg, openDWG, no)
LOC_ARG_WITH(regex, regex)
LOC_ARG_WITH(pthread, POSIX threads, no)
LOC_ARG_WITH(openmp, OpenMP, no)
LOC_ARG_WITH(opencl, OpenCL, no)
LOC_ARG_WITH(bzlib, BZIP2, no)
LOC_ARG_WITH(zstd, Zstandard)

AC_ARG_WITH(gdal,
[  --with-gdal[=path/gdal-config]
                          enable GDAL/OGR support (gdal-config with path,
                          e.g. '--with-gdal=/usr/local/bin/gdal-config')])

AC_ARG_WITH(liblas,
[  --with-liblas[=path/liblas-config]
                          enable libLAS support (liblas-config with path,
                          e.g. '--with-liblas=/usr/local/bin/liblas-config',
                          default: no)],, with_liblas="no")

AC_ARG_WITH(pdal,
[  --with-pdal[=path/pdal-config]
                          enable PDAL support (pdal-config with path,
                          e.g. '--with-pdal=/usr/local/bin/pdal-config',
                          default: no)],, with_pdal="no")

AC_ARG_WITH(wxwidgets,
[  --with-wxwidgets[=path/wx-config]
                          enable wxWidgets support (wx-config with path,
                          e.g. '--with-wxwidgets=/usr/local/bin/wx-config',
                          default: no)],, with_wxwidgets="no")

AC_ARG_WITH(netcdf,
[  --with-netcdf[=path/nc-config]
                          enable NetCDF support (nc-config with path,
                          e.g. '--with-nc=/usr/local/bin/nc-config',
                          default: no)],, with_netcdf="no")

# With includes and libs options

AC_ARG_WITH(geos,
[  --with-geos[=path/geos-config]
                          enable GEOS support (geos-config with path,
                          e.g. '--with-geos=/usr/local/bin/geos-config',
                          default: no)],, with_geos="no")

AC_ARG_WITH(includes,
[  --with-includes=DIRS    site include files are in DIRS])

AC_ARG_WITH(libs,
[  --with-libs=DIRS        site library files are in DIRS])

LOC_ARG_WITH_INC(zlib, zlib)
LOC_ARG_WITH_LIB(zlib, zlib)

LOC_ARG_WITH_INC(bzlib, BZIP2)
LOC_ARG_WITH_LIB(bzlib, BZIP2)

LOC_ARG_WITH_INC(zstd, ZSTD)
LOC_ARG_WITH_LIB(zstd, ZSTD)

LOC_ARG_WITH_INC(readline, Readline)
LOC_ARG_WITH_LIB(readline, Readline)

LOC_ARG_WITH_INC(tiff, TIFF)
LOC_ARG_WITH_LIB(tiff, TIFF)

LOC_ARG_WITH_INC(png, PNG)
LOC_ARG_WITH_LIB(png, PNG)

LOC_ARG_WITH_INC(postgres, PostgreSQL)
LOC_ARG_WITH_LIB(postgres, PostgreSQL)

LOC_ARG_WITH_INC(mysql, MySQL)
LOC_ARG_WITH_LIB(mysql, MySQL)

LOC_ARG_WITH_INC(sqlite, SQLite)
LOC_ARG_WITH_LIB(sqlite, SQLite)

LOC_ARG_WITH_INC(opengl, OpenGL)
LOC_ARG_WITH_LIB(opengl, OpenGL)
LOC_ARG_WITH_FRAMEWORK(opengl, OpenGL)

LOC_ARG_WITH_INC(odbc, ODBC)
LOC_ARG_WITH_LIB(odbc, ODBC)

LOC_ARG_WITH_INC(fftw, FFTW)
LOC_ARG_WITH_LIB(fftw, FFTW)

LOC_ARG_WITH_INC(blas, BLAS)
LOC_ARG_WITH_LIB(blas, BLAS)

LOC_ARG_WITH_INC(lapack, LAPACK)
LOC_ARG_WITH_LIB(lapack, LAPACK)

LOC_ARG_WITH_INC(cairo, cairo)
LOC_ARG_WITH_LIB(cairo, cairo)
LOC_ARG_WITH_LDFLAGS(cairo, cairo)

LOC_ARG_WITH_INC(freetype, FreeType)
LOC_ARG_WITH_LIB(freetype, FreeType)

LOC_ARG_WITH_INC(proj, External PROJ.4)
LOC_ARG_WITH_LIB(proj, External PROJ.4)
LOC_ARG_WITH_SHARE(proj, External PROJ.4)

LOC_ARG_WITH_INC(opendwg, openDWG)
LOC_ARG_WITH_LIB(opendwg, openDWG)

LOC_ARG_WITH_INC(regex, regex)
LOC_ARG_WITH_LIB(regex, regex)

LOC_ARG_WITH_INC(pthread, POSIX threads)
LOC_ARG_WITH_LIB(pthread, POSIX threads)

LOC_ARG_WITH_INC(openmp, OpenMP)
LOC_ARG_WITH_LIB(openmp, OpenMP)

LOC_ARG_WITH_INC(opencl, OpenCL)
LOC_ARG_WITH_LIB(opencl, OpenCL)
#LOC_ARG_WITH_FRAMEWORK(opencl, OpenCL)

# Put this early on so CPPFLAGS and LDFLAGS have any additional dirs

# With includes option

# Handle Fortran compiler choice
#LOC_CHECK_USE(g77, GNU Fortran 77, USE_G77)
# Done checking fortran

AC_MSG_CHECKING(for additional include dirs)
case "$with_includes" in
y | ye | yes | n | no)
	AC_MSG_ERROR([*** You must supply a directory to list --with-includes.])
	;;
esac
AC_MSG_RESULT($with_includes)

if test -n "$with_includes"; then
    for dir in $with_includes; do
        if test -d "$dir"; then
            INCLUDE_DIRS="$INCLUDE_DIRS -I$dir"
        else
            AC_MSG_ERROR([*** Include directory $dir does not exist.])
        fi
    done
    CPPFLAGS="$CPPFLAGS $INCLUDE_DIRS"
fi
AC_SUBST(INCLUDE_DIRS)

# With libs option

AC_MSG_CHECKING(for additional library dirs)
case "$with_libs" in
y | ye | yes | n | no)
	AC_MSG_ERROR([*** You must supply a directory list to --with-libs.])
	;;
esac
AC_MSG_RESULT($with_libs)

if test -n "$with_libs"; then
    for dir in $with_libs; do
        if test -d "$dir"; then
            LIBRARY_DIRS="$LIBRARY_DIRS -L$dir"
        else
            AC_MSG_ERROR([*** Library directory $dir does not exist.])
        fi
    done
    LDFLAGS="$LDFLAGS $LIBRARY_DIRS"
fi
AC_SUBST(LIBRARY_DIRS)

# Programs and standard headers, libraries, functions

AC_PROG_INSTALL

AC_PROG_LEX
if test "$LEX" = "lex"; then
    AC_PATH_PROG(LEXPATH, lex, no)
    if test "$LEXPATH" = "no"; then
	AC_MSG_ERROR([*** Unable to locate lex.])
    fi
fi

AC_PROG_YACC
if test "$YACC" = "yacc"; then
    AC_PATH_PROG(YACCPATH, yacc, no)
    if test "$YACCPATH" = "no"; then
	AC_MSG_ERROR([*** Unable to locate yacc.])
    fi
fi

AC_PROG_RANLIB
AC_CHECK_PROGS(AR, ar)
AC_CHECK_PROGS(ENV, env)
AC_PATH_PROG(PERL, perl, no)  
AC_HEADER_STDC
#AC_CHECK_HEADERS(curses.h limits.h termio.h termios.h unistd.h values.h)
AC_CHECK_HEADERS(limits.h termio.h termios.h unistd.h values.h f2c.h g2c.h)
AC_CHECK_HEADERS(sys/ioctl.h sys/mtio.h sys/resource.h sys/time.h)
AC_CHECK_HEADERS(sys/timeb.h sys/types.h sys/utsname.h)
AC_CHECK_HEADERS(libintl.h iconv.h)
AC_CHECK_HEADERS(langinfo.h)
AC_HEADER_TIME
AC_TYPE_OFF_T
AC_TYPE_UID_T
AC_TYPE_SIGNAL
AC_CYGWIN
AC_CHECK_FUNCS(ftime gethostname gettimeofday lseek nice time uname)
AC_CHECK_FUNCS(seteuid setpriority setreuid setruid)
AC_CHECK_FUNCS(drand48)
AC_CHECK_FUNCS(putenv setenv)
AC_CHECK_FUNCS(nanosleep)
if test "$cross_compiling" != "yes" ; then
AC_FUNC_SETPGRP
else
CROSS_COMPILING=1
AC_SUBST(CROSS_COMPILING)
fi

AC_MSG_CHECKING(for long long int)
AC_TRY_COMPILE(,[long long int x;],[
AC_MSG_RESULT(yes)
AC_DEFINE(HAVE_LONG_LONG_INT)
],[
AC_MSG_RESULT(no)
])

AC_MSG_CHECKING(for int64_t)
AC_TRY_COMPILE([#include <sys/types.h>],[int64_t x;],[
AC_MSG_RESULT(yes)
AC_DEFINE(HAVE_INT64_T)
],[
AC_MSG_RESULT(no)
])

AC_MSG_CHECKING(for W11)
case "$enable_w11" in
	yes|no)	AC_MSG_RESULT("$enable_w11")	;;
	*)	AC_MSG_ERROR([*** You must answer yes or no.])	;;
esac

USE_X11=
USE_W11=
XLIB=
XTLIB=

if test "$enable_w11" = "yes" ; then
    X_CFLAGS=-I${SRCDIR}/display/drivers/windows/libW11
    X_LIBS='-L$(LIBDIR)'
    AC_SUBST(X_CFLAGS)
    AC_SUBST(X_LIBS)

    USE_W11="1"
    USE_X11="1"
    XLIB=-lX11

    CFLAGS="$CFLAGS -D__W98__"
else
    AC_PATH_XTRA
    if test "$no_x" != "yes"; then
        USE_X11="1"
        XLIB=-lX11
        XTLIB=-lXt
    fi
fi

AC_SUBST(XLIB)
AC_SUBST(XTLIB)
AC_SUBST(USE_X11)

# Note that some systems (FreeBSD for example) need an extra library for
# cuserid
ac_save_libs="$LIBS"
LIBS=""
AC_SEARCH_LIBS(cuserid,[compat])
DBMIEXTRALIB="$LIBS"
LIBS="$ac_save_libs"
AC_SUBST(DBMIEXTRALIB)

AC_CHECK_FUNCS(asprintf)
AC_SUBST(HAVE_ASPRINTF)

# Test if mathlib needs -lm flag or is included with libc
AC_CHECK_FUNC(atan, MATHLIB=, [
AC_CHECK_LIB(m, atan, MATHLIB=-lm, [
    AC_MSG_ERROR([*** Failed check for math library.])
])])
AC_SUBST(MATHLIB)

AC_CHECK_FUNC(dlsym, DLLIB=, [
AC_CHECK_LIB(dl, dlsym, DLLIB=-ldl, [
    DLLIB=
])])
AC_SUBST(DLLIB)

AC_CHECK_FUNC(iconv, ICONVLIB=, [
AC_CHECK_LIB(iconv, iconv, ICONVLIB=-liconv, [
AC_CHECK_LIB(giconv, iconv, ICONVLIB=-lgiconv, [
AC_CHECK_FUNC(libiconv, ICONVLIB=, [
AC_CHECK_LIB(iconv, libiconv, ICONVLIB=-liconv, [
AC_CHECK_LIB(giconv, libiconv, ICONVLIB=-lgiconv, [
    AC_MSG_WARN([*** Unable to locate iconv() function.])
    ICONVLIB=
])])])])])])
AC_SUBST(ICONVLIB)

have_socket=1
AC_CHECK_FUNC(socket, SOCKLIB=, [
AC_CHECK_LIB(socket, socket, SOCKLIB=-lsocket, [
    have_socket=0
    AC_MSG_WARN([*** Unable to locate socket() function.])
])])
AC_SUBST(SOCKLIB)
if test "$have_socket" = 1 ; then
  HAVE_SOCKET=1
  AC_DEFINE(HAVE_SOCKET)
else
  HAVE_SOCKET=
fi
AC_SUBST(HAVE_SOCKET)


# Mandatory zlib dependency

ZLIBLIBPATH=
ZLIBINCPATH=
ZLIB=

# With zlib includes directory

LOC_CHECK_INC_PATH(zlib,zlib,ZLIBINCPATH)

LOC_CHECK_INCLUDES(zlib.h,zlib,$ZLIBINCPATH)

# With zlib library directory

LOC_CHECK_LIB_PATH(zlib,zlib,ZLIBLIBPATH)

LOC_CHECK_LIBS(z,deflate,zlib,$ZLIBLIBPATH,ZLIB,,,)

#

AC_SUBST(ZLIBINCPATH)
AC_SUBST(ZLIBLIBPATH)
AC_SUBST(ZLIB)

# Done checking zlib

# bzip2 support

BZIP2LIBPATH=
BZIP2INCPATH=
BZIP2LIB=

LOC_CHECK_USE(bzlib,bzlib,USE_BZIP2)

if test -n "$USE_BZIP2"; then

# With bzip2 includes directory

LOC_CHECK_INC_PATH(bzlib,bzlib,BZIP2INCPATH)

LOC_CHECK_INCLUDES(bzlib.h,bzlib,$BZIP2INCPATH)

# With bzip2 library directory

LOC_CHECK_LIB_PATH(bzlib,bzlib,BZIP2LIBPATH)

LOC_CHECK_LIBS(bz2,BZ2_bzBuffToBuffCompress,bzlib,$BZIP2LIBPATH,BZIP2LIB,,,)

#

fi # $USE_BZIP2

AC_SUBST(BZIP2INCPATH)
AC_SUBST(BZIP2LIBPATH)
AC_SUBST(BZIP2LIB)

# Done checking bzip2

# zstd support

ZSTDLIBPATH=
ZSTDINCPATH=
ZSTDLIB=

LOC_CHECK_USE(zstd,zstd,USE_ZSTD)

if test -n "$USE_ZSTD"; then

# With zstd includes directory

LOC_CHECK_INC_PATH(zstd,zstd,ZSTDINCPATH)
LOC_CHECK_INCLUDES(zstd.h,zstd,$ZSTDINCPATH)

# With zstd library directory

LOC_CHECK_LIB_PATH(zstd,zstd,ZSTDLIBPATH)

LOC_CHECK_LIBS(zstd,ZSTD_compress,zstd,$ZSTDLIBPATH,ZSTDLIB,,,)

#

fi # $USE_ZSTD

AC_SUBST(ZSTDINCPATH)
AC_SUBST(ZSTDLIBPATH)
AC_SUBST(ZSTDLIB)

# Done checking zstd

# Mandatory PROJ dependency

PROJINC=
PROJLIB=
PROJSHARE=
PROJ4API=0

# With PROJ includes directory

LOC_CHECK_INC_PATH(proj,External PROJ,PROJINC)

# PROJ version check: if proj.h exists, it must be proj 5+
LOC_CHECK_INCLUDES(proj.h,External PROJ,$PROJINC,PROJ4API=1)

if test $PROJ4API = 0 ; then
    LOC_CHECK_VERSION_INT(proj.h,PROJ_VERSION_MAJOR,External PROJ major,proj_ver_major,$PROJINC,0)
    LOC_CHECK_VERSION_INT(proj.h,PROJ_VERSION_MINOR,External PROJ minor,proj_ver_minor,$PROJINC,0)
    LOC_CHECK_VERSION_INT(proj.h,PROJ_VERSION_PATCH,External PROJ patch,proj_ver_patch,$PROJINC,0)
    AC_MSG_RESULT([found PROJ version "${proj_ver_major}.${proj_ver_minor}.${proj_ver_patch}"])
    # minimum required PROJ 5+ version to use the new PROJ API: 5.1.0
    if test ${proj_ver_major} = 5 && test `expr ${proj_ver_minor} \< 1` = 1 ; then
	AC_MSG_WARN([At least PROJ version "5.1.0" is required for the new API ])
	PROJ4API=1
    fi
fi

if test $PROJ4API = 0 ; then
    AC_MSG_RESULT([using new PROJ version 5+ API])

    # With PROJ library directory

    LOC_CHECK_LIB_PATH(proj,External PROJ,PROJLIB)
    LOC_CHECK_LIBS(proj,proj_pj_info,External PROJ,$PROJLIB,PROJLIB,,,)
else
    AC_MSG_RESULT([using old PROJ version 4 API])
    AC_DEFINE(USE_PROJ4API)

    LOC_CHECK_INCLUDES(proj_api.h,External PROJ,$PROJINC)
    # PROJ version check for v4.x

    if test "$cross_compiling" = yes; then
	AC_MSG_WARN([*** Cannot check PROJ.4 version (cross-compiling).])
    else
	LOC_CHECK_VERSION_INT(proj_api.h,PJ_VERSION,External PROJ.4,proj_ver,$PROJINC,0)

	if test `expr ${proj_ver} \< 446` = 1 ; then
	    AC_MSG_ERROR([*** PROJ.4.4.6 or later is required.])
	fi
    fi

    # With PROJ library directory

    LOC_CHECK_LIB_PATH(proj,External PROJ.4,PROJLIB)
    LOC_CHECK_LIBS(proj,pj_get_def,External PROJ.4,$PROJLIB,PROJLIB,,,)
fi

# With PROJ share directory

LOC_CHECK_SHARE_PATH(proj,External PROJ,PROJSHARE)
if test -z "$PROJSHARE" ; then
    AC_MSG_WARN([*** External PROJ directory not specified; default will be used])
    PROJSHARE=/usr/share/proj
fi

# LOC_CHECK_SHARE does not work when cross compiling
if test "$cross_compiling" = "yes" ; then
    AC_MSG_CHECKING([for epsg])
    AC_MSG_RESULT([unknown (cross-compiling)])
else
    LOC_CHECK_SHARE(epsg,External PROJ,$PROJSHARE,[
    AC_MSG_WARN([*** Unable to locate PROJ data files.])
    ])
fi

AC_SUBST(PROJINC)
AC_SUBST(PROJLIB)
AC_SUBST(PROJSHARE)

# Done checking PROJ

# Enable regex option

LOC_CHECK_USE(regex,regex,USE_REGEX)

REGEXINCPATH=
REGEXLIBPATH=
REGEXLIB=

if test -n "$USE_REGEX"; then

# With regex includes directory

LOC_CHECK_INC_PATH(regex,regex,REGEXINCPATH)

LOC_CHECK_INCLUDES(regex.h,regex,$REGEXINCPATH)

# With regex library directory

LOC_CHECK_LIB_PATH(regex,regex,REGEXLIBPATH)

LOC_CHECK_FUNC(regcomp,regex functions,REGEXLIB,,,,,[
LOC_CHECK_LIBS(regex,regcomp,regex,$REGEXLIBPATH,REGEXLIB,,,)
])

fi # $USE_REGEX

AC_SUBST(REGEXINCPATH)
AC_SUBST(REGEXLIBPATH)
AC_SUBST(REGEXLIB)
AC_SUBST(USE_REGEX)

# Done checking regex

# Enable Readline option

LOC_CHECK_USE(readline,Readline,USE_READLINE)

READLINEINCPATH=
READLINELIBPATH=
READLINELIB=
HISTORYLIB=

if test -n "$USE_READLINE"; then

# With Readline includes directory

LOC_CHECK_INC_PATH(readline,Readline,READLINEINCPATH)

LOC_CHECK_INCLUDES(readline/readline.h,Readline,$READLINEINCPATH)
LOC_CHECK_INCLUDES(readline/history.h,Readline,$READLINEINCPATH)

# With Readline library directory

LOC_CHECK_LIB_PATH(readline,Readline,READLINELIBPATH)

LOC_CHECK_LIBS(readline,readline,Readline,$READLINELIBPATH,READLINELIB,,,)
LOC_CHECK_LIBS(history,add_history,History,$READLINELIBPATH,HISTORYLIB,,,)

fi # $USE_READLINE

AC_SUBST(READLINEINCPATH)
AC_SUBST(READLINELIBPATH)
AC_SUBST(READLINELIB)
AC_SUBST(HISTORYLIB)

# Done checking Readline

# GDAL option

AC_MSG_CHECKING(whether to use GDAL)

GDAL_LIBS=
GDAL_CFLAGS=
USE_GDAL=
USE_OGR=

if test "`basename xx/$with_gdal`" = "gdal-config" ; then
  GDAL_CONFIG="$with_gdal"
fi

if test "$with_gdal" = "no" ; then
  AC_MSG_RESULT(no)
else
  AC_MSG_RESULT(yes)
  AC_PATH_PROG(GDAL_CONFIG, gdal-config, no)

  if test "$GDAL_CONFIG" = "no" ; then
    AC_MSG_ERROR([*** couldn't find gdal-config])
  fi

  if test "$GDAL_CONFIG" != "" ; then
    GDAL_LIBS=`"$GDAL_CONFIG" --libs`
    GDAL_DEP_LIBS=`"$GDAL_CONFIG" --dep-libs`
    GDAL_CFLAGS=`"$GDAL_CONFIG" --cflags`
    USE_GDAL=1
    if test `"$GDAL_CONFIG" --ogr-enabled` = "yes" ; then
      AC_DEFINE(HAVE_OGR)
      USE_OGR=1
    fi
  fi

  GDAL=
  ac_save_libs="$LIBS"
  ac_save_cflags="$CFLAGS"
  LIBS="$LIBS $GDAL_LIBS"
  CFLAGS="$CFLAGS $GDAL_CFLAGS"
  AC_TRY_LINK([#include <gdal.h>],[GDALOpen("foo", GA_ReadOnly);],,[
  LIBS="$LIBS $GDAL_DEP_LIBS"
  AC_TRY_LINK([#include <gdal.h>],[GDALOpen("foo", GA_ReadOnly);],GDAL_LIBS="$GDAL_LIBS $GDAL_DEP_LIBS",[
  AC_MSG_ERROR([*** Unable to locate GDAL library.])
  ])
  ])
  LIBS=${ac_save_libs}
  CFLAGS=${ac_save_cflags}

  AC_DEFINE(HAVE_GDAL)
fi

AC_SUBST(GDAL_LIBS)
AC_SUBST(GDAL_CFLAGS)
AC_SUBST(USE_GDAL)
AC_SUBST(USE_OGR)

# libLAS option

AC_MSG_CHECKING(whether to use libLAS)

LIBLAS_LIBS=
LIBLAS_CFLAGS=
USE_LIBLAS=

if test "`basename xx/$with_liblas`" = "liblas-config" ; then
  LIBLAS_CONFIG="$with_liblas"
fi

if test "$with_liblas" = "no" ; then
  AC_MSG_RESULT(no)
else
  AC_MSG_RESULT(yes)
  AC_PATH_PROG(LIBLAS_CONFIG, liblas-config, no)

  if test "$LIBLAS_CONFIG" = "no" ; then
    AC_MSG_ERROR([*** couldn't find liblas-config])
  fi

  if test "$LIBLAS_CONFIG" != "" ; then
    LIBLAS_LIBS=`"$LIBLAS_CONFIG" --libs`
    LIBLAS_CFLAGS=`"$LIBLAS_CONFIG" --cflags`
    LIBLAS_INC=`"$LIBLAS_CONFIG" --includes`
    USE_LIBLAS=1
  fi

  LIBLAS=
  ac_save_libs="$LIBS"
  ac_save_cflags="$CFLAGS"
  ac_save_cppflags="$CPPFLAGS"
  LIBS="$LIBS $LIBLAS_LIBS"
  CFLAGS="$CFLAGS $LIBLAS_CFLAGS"
  CPPFLAGS="$CPPFLAGS $LIBLAS_INC"
  AC_CHECK_HEADERS(liblas/capi/liblas.h)
  AC_TRY_LINK([#include <liblas/capi/liblas.h>],[LASReader_Create("foo");],,[
  AC_TRY_LINK([#include <liblas/capi/liblas.h>],[LASReader_Create("foo");],LAS_LIBS="$LAS_LIBS",[
  AC_MSG_ERROR([*** Unable to locate libLAS library.])
  ])
  ])
  LIBS=${ac_save_libs}
  CFLAGS=${ac_save_cflags}
  CPPFLAGS=${ac_save_cppflags}

  AC_DEFINE(HAVE_LIBLAS)
fi

AC_SUBST(LIBLAS_LIBS)
AC_SUBST(LIBLAS_CFLAGS)
AC_SUBST(LIBLAS_INC)
AC_SUBST(USE_LIBLAS)

# PDAL option

AC_MSG_CHECKING(whether to use PDAL)

# new and currently used way to switch language to C++
# AC_LANG_PUSH(C++)
AC_LANG_SAVE
AC_LANG_CPLUSPLUS

PDAL_LIBS=
PDAL_CPPFLAGS=
USE_PDAL=

if test "`basename xx/$with_pdal`" = "pdal-config" ; then
  PDAL_CONFIG="$with_pdal"
fi

if test "$with_pdal" = "no" ; then
  AC_MSG_RESULT(no)
else
  AC_MSG_RESULT(yes)
  AC_PATH_PROG(PDAL_CONFIG, pdal-config, no)

  if test "$PDAL_CONFIG" = "no" ; then
    AC_MSG_ERROR([*** could not find pdal-config])
  fi

  if test "$PDAL_CONFIG" != "" ; then
    PDAL_LIBS=`"$PDAL_CONFIG" --libs`
    PDAL_CPPFLAGS=`"$PDAL_CONFIG" --cxxflags`
    PDAL_INC=`"$PDAL_CONFIG" --includes`
    USE_PDAL=1
  fi

  PDAL=
  ac_save_libs="$LIBS"
  ac_save_cflags="$CFLAGS"
  ac_save_cppflags="$CPPFLAGS"
  LIBS="$LIBS $PDAL_LIBS"
  CFLAGS="$CFLAGS $PDAL_CFLAGS"
  CPPFLAGS="$CPPFLAGS $PDAL_CPPFLAGS $PDAL_INC"
  AC_TRY_LINK([#include <pdal/PointTable.hpp>],[pdal::PointTable table;],,[
  AC_TRY_LINK([#include <pdal/PointTable.hpp>],[pdal::PointTable table;],PDAL_LIBS="$PDAL_LIBS",[
  AC_MSG_ERROR([*** Unable to locate PDAL library.])
  ])
  ])
  LIBS=${ac_save_libs}
  CFLAGS=${ac_save_cflags}
  CPPFLAGS=${ac_save_cppflags}

  AC_DEFINE(HAVE_PDAL)
fi

AC_SUBST(PDAL_LIBS)
AC_SUBST(PDAL_CPPFLAGS)
AC_SUBST(PDAL_INC)
AC_SUBST(USE_PDAL)

# new and currently used way to switch language back to C
# AC_LANG_POP(C++)
AC_LANG_C
AC_LANG_RESTORE

# NetCDF option

AC_MSG_CHECKING(whether to use NetCDF)

NETCDF_LIBS=
NETCDF_CFLAGS=
USE_NETCDF=

if test "`basename xx/$with_netcdf`" = "nc-config" ; then
  NETCDF_CONFIG="$with_netcdf"
fi

if test "$with_netcdf" = "no" ; then
  AC_MSG_RESULT(no)
else
  AC_MSG_RESULT(yes)
  AC_PATH_PROG(NETCDF_CONFIG, nc-config, no)

  if test "$NETCDF_CONFIG" = "no" ; then
    AC_MSG_ERROR([*** couldn't find nc-config])
  fi

  if test "$NETCDF_CONFIG" != "" ; then
    NETCDF_LIBS=`"$NETCDF_CONFIG" --libs`
    NETCDF_CFLAGS=`"$NETCDF_CONFIG" --cflags`
    USE_NETCDF=1
  fi

  NETCDF=
  ac_save_libs="$LIBS"
  ac_save_cflags="$CFLAGS"
  LIBS="$LIBS $NETCDF_LIBS"
  CFLAGS="$CFLAGS $NETCDF_CFLAGS"
  AC_TRY_LINK([#include <netcdf.h>],[nc_create("foo", NC_CLOBBER, NULL);],,[
  AC_TRY_LINK([#include <netcdf.h>],[nc_create("foo", NC_CLOBBER, NULL);],NETCDF_LIBS="$NETCDF_LIBS",[
  AC_MSG_ERROR([*** Unable to locate NetCDF library.])
  ])
  ])
  LIBS=${ac_save_libs}
  CFLAGS=${ac_save_cflags}

  AC_DEFINE(HAVE_NETCDF)
fi

AC_SUBST(NETCDF_LIBS)
AC_SUBST(NETCDF_CFLAGS)
AC_SUBST(USE_NETCDF)

# GEOS option

AC_MSG_CHECKING(whether to use GEOS)

GEOS_LIBS=
GEOS_CFLAGS=
USE_GEOS=

# FIXME: "quote" $with_geos ?
if test "`basename xx/$with_geos`" = "geos-config" ; then
  GEOS_CONFIG="$with_geos"
fi

if test "$with_geos" = "no" ; then
  AC_MSG_RESULT(no)
else
  AC_MSG_RESULT(yes)
  AC_PATH_PROG(GEOS_CONFIG, geos-config, no)

  if test "$GEOS_CONFIG" = "no" ; then
    AC_MSG_ERROR([*** couldn't find geos-config])
  fi
  
  if test "$GEOS_CONFIG" != "" ; then
    GEOS_LIBS=`"$GEOS_CONFIG" --clibs`
    GEOS_CFLAGS=`"$GEOS_CONFIG" --cflags`
    USE_GEOS=1
  fi
  
  LOC_CHECK_INCLUDES(geos_c.h,GEOS,$GEOS_CFLAGS)
### geos 3.3.6 installs geos_c.lib, see http://osgeo-org.1560.n6.nabble.com/osgeo4w-329-update-geos-to-3-3-6-td5024605.html
#  if test "$MINGW32" = yes ; then
#    LOC_CHECK_LIBS(geos_c_i,initGEOS,GEOS,$GEOS_LIBS,GEOS_LIBS)
#  else
  LOC_CHECK_LIBS(geos_c,initGEOS,GEOS,$GEOS_LIBS,GEOS_LIBS)
#  fi
  AC_DEFINE(HAVE_GEOS)
fi

AC_SUBST(GEOS_LIBS)
AC_SUBST(GEOS_CFLAGS)
AC_SUBST(USE_GEOS)

# Enable TIFF option

LOC_CHECK_USE(tiff,TIFF,USE_TIFF)

TIFF_INCLUDE_DIRS=
TIFF_LIBRARY_DIRS=
TIFFLIB=

if test -n "$USE_TIFF"; then

# With TIFF includes directory

LOC_CHECK_INC_PATH(tiff,TIFF,TIFF_INCLUDE_DIRS)

LOC_CHECK_INCLUDES(tiffio.h,TIFF,$TIFF_INCLUDE_DIRS)

# With TIFF library directory

LOC_CHECK_LIB_PATH(tiff,TIFF,TIFF_LIBRARY_DIRS)

LOC_CHECK_LIBS(tiff,TIFFOpen,TIFF,$TIFF_LIBRARY_DIRS,TIFFLIB,,,,-ljpeg,$ZLIB,$MATHLIB)

fi # $USE_TIFF

AC_SUBST(TIFF_INCLUDE_DIRS)
AC_SUBST(TIFF_LIBRARY_DIRS)
AC_SUBST(TIFFLIB)

# Done checking TIFF

# Enable PNG option

LOC_CHECK_USE(png,PNG,USE_PNG)

PNGINC=
PNGLIB=

if test -n "$USE_PNG"; then

# With PNG includes directory

LOC_CHECK_INC_PATH(png,PNG,PNGINC)

LOC_CHECK_INCLUDES(png.h,PNG,$PNGINC)

# With PNG library directory

LOC_CHECK_LIB_PATH(png,PNG,PNGLIB)

LOC_CHECK_LIBS(png,png_read_image,PNG,$PNGLIB,PNGLIB,,$ZLIB $MATHLIB,)

fi # $USE_PNG

AC_SUBST(PNGINC)
AC_SUBST(PNGLIB)
AC_SUBST(USE_PNG)

# Done checking PNG

# Enable PostgreSQL option

LOC_CHECK_USE(postgres,PostgreSQL,USE_POSTGRES)

if test -n "$USE_POSTGRES"; then
AC_DEFINE(HAVE_POSTGRES)
fi # $USE_POSTGRES

PQINCPATH=
PQLIBPATH=
PQLIB=

if test -n "$USE_POSTGRES"; then

# With PostgreSQL includes directory

LOC_CHECK_INC_PATH(postgres,PostgreSQL,PQINCPATH)

LOC_CHECK_INCLUDES(libpq-fe.h,PostgreSQL,$PQINCPATH)

fi # $USE_POSTGRES

if test -n "$USE_POSTGRES"; then

# With PostgreSQL library directory

LOC_CHECK_LIB_PATH(postgres,PostgreSQL,PQLIBPATH)

LOC_CHECK_LIBS(pq,PQsetdbLogin,PostgreSQL,$PQLIBPATH,PQLIB,,,,-lcrypt,-lssl -lcrypto)

ac_save_ldflags="$LDFLAGS"
LDFLAGS="$LDFLAGS $PQLIBPATH"
AC_CHECK_LIB(pq,PQcmdTuples, [AC_DEFINE(HAVE_PQCMDTUPLES)], [
AC_CHECK_LIB(pq,PQcmdTuples, [AC_DEFINE(HAVE_PQCMDTUPLES)], [
], -lcrypt)
])
LDFLAGS="${ac_save_ldflags}"

fi # $USE_POSTGRES

AC_SUBST(USE_POSTGRES)

AC_SUBST(PQINCPATH)
AC_SUBST(PQLIBPATH)
AC_SUBST(PQLIB)

# Done checking PostgreSQL

# Enable MySQL option

LOC_CHECK_USE(mysql,MySQL,USE_MYSQL)

MYSQLINCPATH=
MYSQLLIBPATH=
MYSQLLIB=

if test -n "$USE_MYSQL"; then

# With MySQL includes directory

LOC_CHECK_INC_PATH(mysql,MySQL,MYSQLINCPATH)

LOC_CHECK_INCLUDES(mysql.h,MySQL,$MYSQLINCPATH)

fi # $USE_MYSQL

if test -n "$USE_MYSQL"; then
  # With MySQL library directory

  LOC_CHECK_LIB_PATH(mysql,MySQL,MYSQLLIBPATH)

  LOC_CHECK_LIBS(mysqlclient,mysql_query,MySQL,$MYSQLLIBPATH,MYSQLLIB,,,,$ZLIB,$SOCKLIB,$MATHLIB)

  # Check for libmysqld (for embedded version of the driver)
  AC_PATH_PROG(MYSQLD_CONFIG, mysql_config, no)

  if test "$MYSQLD_CONFIG" = "no" ; then
    AC_MSG_ERROR([*** couldn't find mysql_config])
  fi

  if test "$MYSQLD_CONFIG" != "" ; then
    AC_LANG_SAVE
    AC_LANG_CPLUSPLUS
    ac_save_libs="$LIBS"
    MYSQLDLIB=`"$MYSQLD_CONFIG" --libmysqld-libs`

    LIBS="$MYSQLDLIB $LIBS"
    AC_CHECK_FUNC(mysql_server_init,,[MYSQLDLIB="";
                  AC_MSG_WARN([libmysqld not found])] )
    LIBS=$ac_save_libs
    AC_LANG_C
    AC_LANG_RESTORE
  fi

fi # $USE_MYSQL

AC_SUBST(USE_MYSQL)

AC_SUBST(MYSQLINCPATH)
AC_SUBST(MYSQLLIBPATH)
AC_SUBST(MYSQLLIB)
AC_SUBST(MYSQLDLIB)

# Done checking MySQL

# Enable SQLite option

LOC_CHECK_USE(sqlite,SQLite,USE_SQLITE)

SQLITEINCPATH=
SQLITELIBPATH=
SQLITELIB=

if test -n "$USE_SQLITE"; then

# With SQLite includes directory

LOC_CHECK_INC_PATH(sqlite,SQLite,SQLITEINCPATH)

LOC_CHECK_INCLUDES(sqlite3.h,SQLite,$SQLITEINCPATH)

AC_DEFINE(HAVE_SQLITE)

fi # $USE_SQLITE

if test -n "$USE_SQLITE"; then

# With SQLite library directory

LOC_CHECK_LIB_PATH(sqlite,SQLite,SQLITELIBPATH)

LOC_CHECK_LIBS(sqlite3,sqlite3_open,SQLite,$SQLITELIBPATH,SQLITELIB,,,,$MATHLIB,$DLLIB)

fi # $USE_SQLITE

AC_SUBST(USE_SQLITE)

AC_SUBST(SQLITEINCPATH)
AC_SUBST(SQLITELIBPATH)
AC_SUBST(SQLITELIB)

# Done checking SQLite

# Enable OpenGL option

OPENGLINC=
OPENGLLIB=
OPENGLULIB=
USE_OPENGL=
OPENGL_X11=
OPENGL_AQUA=
OPENGL_WINDOWS=

AC_MSG_CHECKING(whether to use OpenGL)
AC_MSG_RESULT("$with_opengl")
case "$with_opengl" in
	n|no)
		OPENGL_TYPE=none
		;;
	y|yes|x|x11|glx)
		OPENGL_TYPE=X11
		USE_OPENGL=1
		OPENGL_X11=1
		;;
	aqua|mac|osx|macosx|agl)
		OPENGL_TYPE=Aqua
		USE_OPENGL=1
		OPENGL_AQUA=1
		;;
	win|windows|mswin|wgl)
		OPENGL_TYPE=Windows
		USE_OPENGL=1
		OPENGL_WINDOWS=1
		;;
	*)
		AC_MSG_ERROR([*** Valid arguments for --with-opengl= are yes,no,x11,aqua,windows.])
		;;
esac

if test -n "$USE_OPENGL" ; then

if test "$OPENGL_X11" = 1 ; then

# With OpenGL includes directory

LOC_CHECK_INC_PATH(opengl,OpenGL,OPENGLINC)

LOC_CHECK_INCLUDES(GL/gl.h GL/glu.h,OpenGL,$OPENGLINC $X_CFLAGS)

# With OpenGL library directory

LOC_CHECK_LIB_PATH(opengl,OpenGL,OPENGL_LIB_PATH)

LOC_CHECK_LIBS(GL,glBegin,OpenGL,$OPENGL_LIB_PATH,OPENGLLIB,$X_LIBS $X_PRE_LIBS -lX11 $X_EXTRA_LIBS $MATHLIB,,,-lpthread,-lXext)

LOC_CHECK_LIBS(GLU,gluBeginCurve,GLU,$OPENGL_LIB_PATH,OPENGLULIB,$OPENGLLIB $X_LIBS $X_PRE_LIBS -lX11 $X_EXTRA_LIBS $MATHLIB,,,-lstdc++)

OPENGLLIB="$OPENGL_LIB_PATH $OPENGLLIB"
OPENGLULIB="$OPENGL_LIB_PATH $OPENGLULIB"

LOC_CHECK_FUNC(glXCreatePbuffer,,,,,$OPENGLLIB,[AC_DEFINE(HAVE_PBUFFERS)])
LOC_CHECK_FUNC(glXCreateGLXPixmap,,,,,$OPENGLLIB,[AC_DEFINE(HAVE_PIXMAPS)])

AC_DEFINE(OPENGL_X11)

fi # $OPENGL_X11

if test "$OPENGL_AQUA" = 1 ; then

LOC_CHECK_FRAMEWORK_PATH(opengl,OpenGL,OPENGLPATH)

LOC_CHECK_INCLUDES(OpenGL/gl.h OpenGL/glu.h,OpenGL,$OPENGLPATH)

LOC_CHECK_FUNC(glBegin,OpenGL library,OPENGLLIB,-framework OpenGL -framework AGL -framework ApplicationServices,$OPENGLPATH)
LOC_CHECK_FUNC(gluBeginCurve,GLU library,OPENGLLIB,,$OPENGLPATH,$OPENGLLIB)

OPENGLINC="$OPENGLPATH"
OPENGLLIBPATH="$OPENGLPATH"

AC_DEFINE(OPENGL_AQUA)

fi # $OPENGL_AQUA

if test "$OPENGL_WINDOWS" = 1 ; then

# With OpenGL includes directory

LOC_CHECK_INC_PATH(opengl,OpenGL,OPENGLINC)

LOC_CHECK_INCLUDES(GL/gl.h GL/glu.h,OpenGL,$OPENGLINC)

# With OpenGL library directory

LOC_CHECK_LIB_PATH(opengl,OpenGL,OPENGL_LIB_PATH)

ac_save_cflags="$CFLAGS"
CFLAGS="$CFLAGS $OPENGLINC"
LOC_CHECK_LINK(opengl32,[#include <GL/gl.h>],[glEnd();],OpenGL,$OPENGL_LIB_PATH,OPENGLLIB)
LOC_CHECK_LINK(glu32,[#include <GL/glu.h>],[gluNewQuadric();],GLU,$OPENGL_LIB_PATH,OPENGLULIB,$OPENGLLIB)
CFLAGS="${ac_save_cflags}"

OPENGLLIB="$OPENGL_LIB_PATH $OPENGLLIB"
OPENGLULIB="$OPENGL_LIB_PATH $OPENGLULIB"

AC_DEFINE(OPENGL_WINDOWS)

fi # $OPENGL_WINDOWS

fi # $USE_OPENGL

AC_SUBST(USE_OPENGL)
AC_SUBST(OPENGL_X11)
AC_SUBST(OPENGL_AQUA)
AC_SUBST(OPENGL_WINDOWS)

AC_SUBST(OPENGLINC)
AC_SUBST(OPENGLLIB)
AC_SUBST(OPENGLULIB)

# Done checking OpenGL

# Enable ODBC option

LOC_CHECK_USE(odbc,ODBC,USE_ODBC)

ODBCINC=
ODBCLIB=

if test -n "$USE_ODBC"; then

# With ODBC includes directory

LOC_CHECK_INC_PATH(odbc,ODBC,ODBCINC)

LOC_CHECK_INCLUDES(sql.h,ODBC,$ODBCINC)

# With ODBC library directory

LOC_CHECK_LIB_PATH(odbc,ODBC,ODBCLIB)

LOC_CHECK_LIBS(odbc,SQLConnect,ODBC,$ODBCLIB,ODBCLIB,$ICONVLIB,,[
LOC_CHECK_LIBS(iodbc,SQLConnect,ODBC,$ODBCLIB,ODBCLIB,,,[
ac_save_cflags="$CFLAGS"
CFLAGS="$CFLAGS $ODBCINC"
LOC_CHECK_LINK(odbc32,[#include <windows.h>
#include <sql.h>],[SQLAllocEnv((SQLHENV *)0);],ODBC,$ODBCLIB,ODBCLIB)
CFLAGS="${ac_save_cflags}"
])
])

fi # $USE_ODBC

AC_SUBST(ODBCINC)
AC_SUBST(ODBCLIB)

# Done checking ODBC

# Enable FFTW option

LOC_CHECK_USE(fftw,FFTW,USE_FFTW)

FFTWINC=
FFTWLIB=

if test -n "$USE_FFTW"; then

# With FFTW includes directory

LOC_CHECK_INC_PATH(fftw,FFTW,FFTWINC)

LOC_CHECK_INCLUDES(fftw3.h,FFTW,$FFTWINC,[
LOC_CHECK_INCLUDES(fftw.h,FFTW,,[
LOC_CHECK_INCLUDES(dfftw.h,FFTW,,)
])
])

# With FFTW library directory

LOC_CHECK_LIB_PATH(fftw,FFTW,FFTWLIB)

LOC_CHECK_LIBS(fftw3, fftw_execute,FFTW,$FFTWLIB,FFTWLIB,,$MATHLIB,[
LOC_CHECK_LIBS(fftw, fftwnd_one,FFTW,$FFTWLIB,FFTWLIB,,$MATHLIB,[
LOC_CHECK_LIBS(dfftw,fftwnd_one,FFTW,$FFTWLIB,FFTWLIB,,$MATHLIB,)
])
])

fi # $USE_FFTW

AC_SUBST(FFTWINC)
AC_SUBST(FFTWLIB)

# Done checking FFTW

# Enable BLAS option

LOC_CHECK_USE(blas,BLAS,USE_BLAS)

BLASLIB=
BLASINC=

if test -n "$USE_BLAS"; then

# With BLAS includes directory
# BLAS doesn't have includes (FORTRAN library)
# With BLAS library directory

LOC_CHECK_INC_PATH(blas, BLAS, BLASINC)
LOC_CHECK_LIB_PATH(blas, BLAS, BLASLIB)

# See if cblas.h exists (CBLAS,ATLAS,others)
save_CPPFLAGS="$CPPFLAGS"
CPPFLAGS="$BLASINC $CPPFLAGS"
AC_CHECK_HEADERS(cblas.h)
CPPFLAGS="$save_CPPFLAGS"

LOC_CHECK_LIBS(blas,dnrm2_,BLAS,$BLASLIB,BLASLIB,$MATHLIB,,,-lg2c)

blas_ok=no

# Check for ATLAS
save_LDFLAGS="$LDFLAGS"
LDFLAGS="$BLASLIB $LDFLAGS"
AC_CHECK_LIB(atlas, ATL_xerbla,
		[AC_CHECK_LIB(f77blas, sgemm_,
		[AC_CHECK_LIB(cblas, cblas_dgemm, 
			[blas_ok=yes; BLASLIB="-lcblas -lf77blas -latlas"],
			[],[-lf77blas -latlas])],
		[],[-latlas])]
)
LDFLAGS="$save_LDFLAGS"

# Do we have ATLAS?
if test $blas_ok = yes; then
	AC_DEFINE(HAVE_LIBATLAS)
fi

# BLAS in Apple vecLib framework? (Mac OS-X)
#  not dependent on APP build
#if test -n "$MACOSX_APP"; then
if test $blas_ok = no; then
	vlib_flags="-framework vecLib"
	save_LIBS="$LIBS"
	LIBS="$vlib_flags $LIBS"
	AC_MSG_CHECKING([for sgemm in $vlib_flags])
	AC_TRY_LINK([], [sgemm], [blas_ok=yes; BLASLIB="$vlib_flags"], [BLASLIB=""])
	AC_MSG_RESULT($blas_ok)
	LIBS="$save_LIBS"
fi
#fi # $MACOSX_APP

# BLAS in PhiPACK libraries? (requires generic BLAS, too)
if test $blas_ok = no; then
	AC_CHECK_LIB(blas, sgemm_,
		[AC_CHECK_LIB(dgemm, dgemm_,
		[AC_CHECK_LIB(sgemm, sgemm_,
			[blas_ok=yes; BLASLIB="-lsgemm -ldgemm -lblas"],
			[], [-lblas])],
			[], [-lblas])]
	)
fi

# BLAS in Sun Performance library?
if test $blas_ok = no; then
	if test "x$GCC" != xyes; then # only works with Sun CC
		AC_CHECK_LIB(sunmath, acosp,
			[AC_CHECK_LIB(sunperf, sgemm_,
				[blas_ok=yes; BLASLIB="-xlic_lib=sunperf -lsunmath"],
			[], [-lsunmath])]
		)
	fi
fi

# Generic BLAS library
if test $blas_ok = no; then
	AC_CHECK_LIB(blas, sgemm_, [blas_ok=yes; BLASLIB="-lblas"])
fi

if test $blas_ok = yes; then
AC_DEFINE(HAVE_LIBBLAS)
fi

fi # $USE_BLAS

AC_SUBST(BLASLIB)
AC_SUBST(BLASINC)

# Done checking BLAS

# Enable LAPACK option

LOC_CHECK_USE(lapack,LAPACK,USE_LAPACK)

LAPACKLIB=
LAPACKINC=

# LAPACK is useless without BLAS
if test -n "$USE_BLAS"; then
if test -n "$USE_LAPACK"; then

# With LAPACK includes directory
# LAPACK doesn't have includes (FORTRAN library)
# With LAPACK library directory

lapack_ok=no

LOC_CHECK_INC_PATH(lapack, LAPACK, LAPACKINC)
LOC_CHECK_LIB_PATH(lapack, LAPACK, LAPACKLIB)

# See if clapack.h exists (ATLAS)
save_CPPFLAGS="$CPPFLAGS"
CPPFLAGS="$LAPACKINC $CPPFLAGS"
AC_CHECK_HEADERS(clapack.h)
CPPFLAGS="$save_CPPFLAGS"

# LAPACK linked to by default?
if test lapack_ok=no; then
	save_LIBS="$LIBS"; LIBS="$LIBS $BLASLIB $MATHLIB $FLIBS"
	save_LDFLAGS="$LDFLAGS"; LDFLAGS="$LAPACKLIB $LDFLAGS"
	AC_CHECK_FUNC(dsegv_, [lapack_ok=yes])
	LIBS="$save_LIBS"
	LDFLAGS="$save_LDFLAGS"
fi

# Generic LAPACK library?
if test $lapack_ok = no; then
	save_libs="$LIBS"; LIBS="$BLASLIB $MATHLIB $LIBS"
	save_LDFLAGS="$LDFLAGS"; LDFLAGS="$LAPACKLIB $LDFLAGS"
	AC_CHECK_LIB(lapack, desgv_,
		[lapack_ok=yes; LAPACKLIB="-llapack"], [], [$FLIBS])
	LIBS="$save_LIBS"
	LDFLAGS="$save_LDFLAGS"
fi

if test $lapack_ok = no; then
	LOC_CHECK_LIBS(lapack,dgesv_,LAPACK,$LAPACKLIB,LAPACKLIB,$BLASLIB $MATHLIB,,,-lg2c)
fi

AC_DEFINE(HAVE_LIBLAPACK)

fi # $USE_LAPACK
fi # $USE_BLAS

AC_SUBST(LAPACKLIB)
AC_SUBST(LAPACKINC)

# Done checking LAPACK

# Enable Cairo display driver option

LOC_CHECK_USE(cairo,Cairo,USE_CAIRO)

CAIROINC=
CAIROLIB=

if test -n "$USE_CAIRO"; then

cairo="cairo"
pkgs="cairo-ft cairo-fc cairo-pdf cairo-ps cairo-svg fontconfig"
if test -n "$USE_X11"; then
	pkgs="$pkgs cairo-xlib cairo-xlib-xrender"
fi
for pkg in $pkgs ; do
    if pkg-config --exists $pkg ; then
        cairo="$cairo $pkg"
    fi
done

# With Cairo includes directory
#FIXME: somehow quote dirs with spaces in $cairo ?
CAIROINC=`pkg-config --cflags $cairo`

LOC_CHECK_INC_PATH(cairo,cairo,CAIROINC)

LOC_CHECK_INCLUDES(cairo.h,Cairo,$CAIROINC)

# With Cairo library directory

CAIROLIB=`pkg-config --libs $cairo`

LOC_CHECK_LIB_PATH(cairo,cairo,CAIROLIB)
LOC_CHECK_LDFLAGS(cairo,cairo,CAIROLIB)

LOC_CHECK_FUNC(cairo_create,,,,,$CAIROLIB,[:])
LOC_CHECK_FUNC(cairo_xlib_surface_create_with_xrender_format,,,,,$CAIROLIB,
[CAIRO_HAS_XRENDER=1],[CAIRO_HAS_XRENDER=])
AC_SUBST(CAIRO_HAS_XRENDER)
LOC_CHECK_FUNC(cairo_xlib_surface_get_xrender_format,,,,,$CAIROLIB,
[CAIRO_HAS_XRENDER_SURFACE=1],[CAIRO_HAS_XRENDER_SURFACE=])
AC_SUBST(CAIRO_HAS_XRENDER_SURFACE)

CAIROLIB="$CAIROLIB $CAIROLDFLAGS"

fi # $USE_CAIRO

AC_SUBST(CAIROINC)
AC_SUBST(CAIROLIB)
AC_SUBST(USE_CAIRO)

# Done checking Cairo

# Enable FreeType option

LOC_CHECK_USE(freetype,FreeType,USE_FREETYPE)

FTINC=
FTLIB=

if test -n "$USE_FREETYPE"; then

# With FreeType includes directory

LOC_CHECK_INC_PATH(freetype,FreeType,FTINC)

LOC_CHECK_INCLUDES(ft2build.h,FreeType,$FTINC)

# With FreeType library directory

LOC_CHECK_LIB_PATH(freetype,FreeType,FTLIB)

LOC_CHECK_LIBS(freetype,FT_Init_FreeType,FreeType,$FTLIB,FTLIB,,,)

fi # $USE_FREETYPE

AC_SUBST(FTINC)
AC_SUBST(FTLIB)

# Done checking FreeType

# Enable NLS option

LOC_CHECK_USE(nls,NLS,USE_NLS)

INTLLIB=
HAVE_NLS=

if test -n "${USE_NLS}" ; then
    AC_DEFINE(USE_NLS)

AC_CHECK_FUNC(gettext, INTLLIB=, [
AC_CHECK_LIB(intl, gettext, INTLLIB=-lintl, [
    AC_MSG_ERROR([*** Unable to locate gettext() function.])
])])

    HAVE_NLS=1
fi

AC_SUBST(INTLLIB)
AC_SUBST(HAVE_NLS)

# Enable C++ option
 
LOC_CHECK_USE(cxx,C++,USE_CXX)

if test -n "$USE_CXX"; then
	AC_PROG_CXX
else
	CXX=
	CXXFLAGS=
	AC_SUBST(CXX)
	AC_SUBST(CXXFLAGS)
fi

# Done checking C++

# Enable openDWG option

LOC_CHECK_USE(opendwg,openDWG,USE_OPENDWG)

OPENDWGINCPATH=
OPENDWGLIBPATH=
OPENDWGLIB=

if test -n "${USE_OPENDWG}"; then

# With OPENDWG includes directory

LOC_CHECK_INC_PATH(opendwg,openDGW,OPENDWGINCPATH)

LOC_CHECK_INCLUDES(ad2.h,openDWG,$OPENDWGINCPATH)

# With OPENDWG library directory

LOC_CHECK_LIB_PATH(opendwg,openDWG,OPENDWGLIBPATH)

#search for ad2.a, ad3.a ... in openDWG toolkit directory:
#FIX ME  how to program this test??
#LOC_CHECK_LIBS(ad?.a,adSeekLayer,openDWG,$OPENDWGLIBPATH,OPENDWGLIB,,)
#
#for now hack (but working):
TRUEOPENDWGLIBPATH=`echo "$OPENDWGLIBPATH" | cut -b3-`
adlib=`ls -1 "$TRUEOPENDWGLIBPATH"/ad?.a | tail -1`
OPENDWGLIB="$adlib"

fi # $USE_OPENDWG

AC_SUBST(OPENDWGINCPATH)
AC_SUBST(OPENDWGLIBPATH)
AC_SUBST(OPENDWGLIB)
AC_SUBST(USE_OPENDWG)

# Done checking OPENDWG

# Enable pthread option

LOC_CHECK_USE(pthread,POSIX threads,USE_PTHREAD)

PTHREADINCPATH=
PTHREADLIBPATH=
PTHREADLIB=

if test -n "$USE_PTHREAD"; then

# With pthread includes directory

LOC_CHECK_INC_PATH(pthread,POSIX threads,PTHREADINCPATH)

LOC_CHECK_INCLUDES(pthread.h,POSIX threads,$PTHREADINCPATH)

# With pthread library directory

LOC_CHECK_LIB_PATH(pthread,POSIX threads,PTHREADLIBPATH)

LOC_CHECK_FUNC(pthread_create,POSIX threads functions,PTHREADLIB,,,,,[
LOC_CHECK_LIBS(pthread,pthread_create,POSIX threads,$PTHREADLIBPATH,PTHREADLIB,,,)
])

fi # $USE_PTHREAD

AC_SUBST(PTHREADINCPATH)
AC_SUBST(PTHREADLIBPATH)
AC_SUBST(PTHREADLIB)
AC_SUBST(USE_PTHREAD)

# Done checking pthread

# Enable OpenMP option

LOC_CHECK_USE(openmp,OpenMP,USE_OPENMP)

OMPINCPATH=
OMPLIBPATH=
OMPLIB=
OMPCFLAGS=

if test -n "$USE_OPENMP"; then

# With OpenMP includes directory

LOC_CHECK_INC_PATH(openmp,OpenMP,OMPINCPATH)

LOC_CHECK_INCLUDES(omp.h,OpenMP,$OMPINCPATH)

# With OpenMP library directory
# GCC et al.: -lgomp
# Solaris cc: -lmtsk
# AIX xlc: -lxlsmp
# SGI IRIX 6.5 MIPSpro C/C++: -lmp

LOC_CHECK_LIB_PATH(openmp,OpenMP,OMPLIBPATH)

LOC_CHECK_FUNC(GOMP_parallel_start,OpenMP functions,OMPLIB,,,,,[
LOC_CHECK_LIBS(gomp,GOMP_parallel_start,OpenMP,$OMPLIBPATH,OMPLIB,,,)
])

# compiler dependent
#if test ${CC} = "gcc" ; then
if test x$GCC = xyes ; then
	# GNU C compiler (>= 4.2.1)
	OMPCFLAGS=-fopenmp
elif test ${CC} = "icc" ; then
	# Intel compiler
	OMPCFLAGS=-openmp
elif test ${CC} = "opencc" ; then
	# AMD's x86 Open64 compiler
	OMPCFLAGS=-mp
elif test ${CC} = "pgcc" ; then
	# Portland Group's compiler
	OMPCFLAGS=-mp
# ... anybody else?
fi

# try to build a test program with "$CC $OMPCLFAGS" to confirm it works
#...how?
#echo "int main() {return 0;}" > test.c 
#$CC $OMPCLFAGS test.c -o test

fi # $USE_OPENMP

AC_SUBST(OMPINCPATH)
AC_SUBST(OMPLIBPATH)
AC_SUBST(OMPLIB)
AC_SUBST(OMPCFLAGS)
AC_SUBST(USE_OPENMP)

# Done checking OpenMP

# Enable OpenCL option

LOC_CHECK_USE(opencl,OpenCL,USE_OPENCL)

OCLINCPATH=
OCLLIBPATH=
OCLLIB=

if test -n "$USE_OPENCL"; then

# With OpenCL includes directory

LOC_CHECK_INC_PATH(opencl,OpenCL,OCLINCPATH)

if test -n "$MACOSX_APP" ; then
    LOC_CHECK_INCLUDES(OpenCL/opencl.h,OpenCL,$OCLINCPATH)

    # With OpenCL library directory
    ### FIXME: ###
    #LOC_CHECK_FRAMEWORK_PATH(opencl,OpenCL,OPENCLPATH)
    # last term in following would become ',$OPENCLPATH)' if above is uncommented
    LOC_CHECK_FUNC(clGetPlatformInfo,OpenCL library,OCLLIB,-framework OpenCL,)
else
    LOC_CHECK_INCLUDES(CL/cl.h,OpenCL,$OCLINCPATH)

    # With OpenCL library directory
    LOC_CHECK_LIB_PATH(opencl,OpenCL,OCLLIBPATH)
    LOC_CHECK_LIBS(OpenCL,clGetPlatformInfo,OpenCL,$OCLLIBPATH,OCLLIB,,,)
    # expanded symbol check: yes? no?
    #LOC_CHECK_FUNC(clGetPlatformInfo,OpenCL functions,OCLLIB,,,,,[
    #LOC_CHECK_LIBS(OpenCL,clGetPlatformInfo,OpenCL,$OCLLIBPATH,OCLLIB,,,)
    #])
fi

fi # $USE_OPENCL

AC_SUBST(OCLINCPATH)
AC_SUBST(OCLLIBPATH)
AC_SUBST(OCLLIB)
AC_SUBST(USE_OPENCL)

# Done checking OpenCL

# Enable LFS (from cdr-tools, tar, and autoconf 2.68)
dnl Check for large file support
dnl Do this last to make sure that no large file definition
dnl in confdefs.h will modify our results
AC_SYS_LARGEFILE
ac_save_cflags=${CFLAGS}
CFLAGS="$LFS_CFLAGS ${ac_save_cflags}"
dnl Warning do not run this test. it interferes with the test
dnl AC_CHECK_FUNCS(fseeko ftello) from above.
dnl The test AC_HAVE_LARGEFILES will check whether ftello/fseeko
dnl are available in Large File mode
AC_FUNC_FSEEKO
AC_HAVE_LARGEFILES
CFLAGS=${ac_save_cflags}
# Done large file support

USE_TERMIO=
AC_SUBST(USE_TERMIO)

STRIPFLAG=
AC_SUBST(STRIPFLAG)

GRASS_HOME="${DSTDIR}"
AC_SUBST(GRASS_HOME)

AC_OUTPUT(include/Make/Platform.make include/Make/Doxyfile_arch_html include/Make/Doxyfile_arch_latex include/version.h grass.pc)

LOC_MSG([Copying config.status to config.status.${ARCH}])
cp -f config.status config.status.${ARCH}

# Display configuration status

LOC_MSG()
LOC_MSG([GRASS is now configured for:  ${host}])
LOC_MSG()
LOC_MSG([  Source directory:           ${SRCDIR}])
LOC_MSG([  Build directory:            ${DSTDIR}])
LOC_MSG([  Installation directory:     ${INSTDIR}])
LOC_MSG([  Startup script in directory:${bindir}])
LOC_MSG([  C compiler:                 ${CC} ${CFLAGS}])
LOC_MSG([  C++ compiler:               ${CXX} ${CXXFLAGS}])
LOC_MSG([  Building shared libraries:  ${shared_ok}])
LOC_MSG([  OpenGL platform:            ${OPENGL_TYPE}])
LOC_MSG()
LOC_MSG_USE(MacOSX application,MACOSX_APP)
LOC_MSG([  MacOSX architectures:       ${MACOSX_ARCHS}])
LOC_MSG([  MacOSX SDK:                 ${MACOSX_SDK}])
LOC_MSG()
LOC_MSG_USE(BLAS support,USE_BLAS)
LOC_MSG_USE(BZIP2 support,USE_BZIP2)
LOC_MSG_USE(C++ support,USE_CXX)
LOC_MSG_USE(Cairo support,USE_CAIRO)
LOC_MSG_USE(DWG support,USE_OPENDWG)
LOC_MSG_USE(FFTW support,USE_FFTW)
LOC_MSG_USE(FreeType support,USE_FREETYPE)
LOC_MSG_USE(GDAL support,USE_GDAL)
LOC_MSG_USE(GEOS support,USE_GEOS)
LOC_MSG_USE(LAPACK support,USE_LAPACK)
LOC_MSG_USE(Large File support (LFS), USE_LARGEFILES)
LOC_MSG_USE(libLAS support,USE_LIBLAS)
LOC_MSG_USE(MySQL support,USE_MYSQL)
LOC_MSG_USE(NetCDF support,USE_NETCDF)
LOC_MSG_USE(NLS support,USE_NLS)
LOC_MSG_USE(ODBC support,USE_ODBC)
LOC_MSG_USE(OGR support,USE_OGR)
LOC_MSG_USE(OpenCL support,USE_OPENCL)
LOC_MSG_USE(OpenGL support,USE_OPENGL)
LOC_MSG_USE(OpenMP support,USE_OPENMP)
LOC_MSG_USE(PDAL support,USE_PDAL)
LOC_MSG_USE(PNG support,USE_PNG)
LOC_MSG_USE(POSIX thread support,USE_PTHREAD)
LOC_MSG_USE(PostgreSQL support,USE_POSTGRES)
LOC_MSG_USE(Readline support,USE_READLINE)
LOC_MSG_USE(Regex support,USE_REGEX)
LOC_MSG_USE(SQLite support,USE_SQLITE)
LOC_MSG_USE(TIFF support,USE_TIFF)
LOC_MSG_USE(X11 support,USE_X11)
LOC_MSG_USE(Zstandard support,USE_ZSTD)
LOC_MSG()
# remove when the new PROJ API is stable
if test $PROJ4API = 0 ; then
AC_MSG_RESULT([  using new PROJ 5+ API])
else
AC_MSG_RESULT([  using old PROJ 4 API])
fi
LOC_MSG()