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# ===========================================================================
# https://www.gnu.org/software/autoconf-archive/ax_lib_gdal.html
# ===========================================================================
#
# SYNOPSIS
#
# AX_LIB_GDAL([MINIMUM-VERSION])
#
# DESCRIPTION
#
# This macro provides tests of availability of GDAL/OGR library of
# particular version or newer.
#
# AX_LIB_GDAL macro takes only one argument which is optional. If there is
# no required version passed, then macro does not run version test.
#
# The --with-gdal option takes complete path to gdal-config utility,
#
# This macro calls AC_SUBST for:
#
# GDAL_VERSION
# GDAL_CFLAGS
# GDAL_LDFLAGS
# GDAL_DEP_LDFLAGS
# GDAL_OGR_ENABLED
#
# and AC_DEFINE for:
#
# HAVE_GDAL
# HAVE_GDAL_OGR
#
# LICENSE
#
# Copyright (c) 2011 Mateusz Loskot <mateusz@loskot.net>
# Copyright (c) 2011 Alessandro Candini <candini@meeo.it>
#
# Copying and distribution of this file, with or without modification, are
# permitted in any medium without royalty provided the copyright notice
# and this notice are preserved. This file is offered as-is, without any
# warranty.
#serial 5
AC_DEFUN([AX_LIB_GDAL],
[
dnl If gdal-config path is not given in ---with-gdal option,
dnl check if it is present in the system anyway
AC_ARG_WITH([gdal],
AS_HELP_STRING([--with-gdal=@<:@ARG@:>@],
[Specify full path to gdal-config script]),
[ac_gdal_config_path=$withval],
[gdal_config_system=check])
dnl if gdal-config is present in the system, fill the ac_gdal_config_path variable with it full path
AS_IF([test "x$gdal_config_system" = xcheck],
[AC_PATH_PROG([GDAL_CONFIG], [gdal-config])],
[AC_PATH_PROG([GDAL_CONFIG], [gdal-config],
[no], [`dirname $ac_gdal_config_path 2> /dev/null`])]
)
if test ! -x "$GDAL_CONFIG"; then
AC_MSG_ERROR([gdal-config does not exist or it is not an executable file])
GDAL_CONFIG="no"
found_gdal="no"
fi
GDAL_VERSION=""
GDAL_CFLAGS=""
GDAL_LDFLAGS=""
GDAL_DEP_LDFLAGS=""
GDAL_OGR_ENABLED=""
dnl
dnl Check GDAL library (libgdal)
dnl
if test "$GDAL_CONFIG" != "no"; then
AC_MSG_CHECKING([for GDAL library])
GDAL_VERSION="`$GDAL_CONFIG --version`"
GDAL_CFLAGS="`$GDAL_CONFIG --cflags`"
GDAL_LDFLAGS="`$GDAL_CONFIG --libs`"
GDAL_DEP_LDFLAGS="`$GDAL_CONFIG --dep-libs`"
AC_DEFINE([HAVE_GDAL], [1], [Define to 1 if GDAL library are available])
found_gdal="yes"
else
found_gdal="no"
fi
AC_MSG_RESULT([$found_gdal])
if test "$found_gdal" = "yes"; then
AC_MSG_CHECKING([for OGR support in GDAL library])
GDAL_OGR_ENABLED="`$GDAL_CONFIG --ogr-enabled`"
AC_DEFINE([HAVE_GDAL_OGR], [1], [Define to 1 if GDAL library includes OGR support])
AC_MSG_RESULT([$GDAL_OGR_ENABLED])
fi
dnl
dnl Check if required version of GDAL is available
dnl
gdal_version_req=ifelse([$1], [], [], [$1])
if test "$found_gdal" = "yes" -a -n "$gdal_version_req"; then
AC_MSG_CHECKING([if GDAL version is >= $gdal_version_req])
dnl Decompose required version string of GDAL
dnl and calculate its number representation
gdal_version_req_major=`expr $gdal_version_req : '\([[0-9]]*\)'`
gdal_version_req_minor=`expr $gdal_version_req : '[[0-9]]*\.\([[0-9]]*\)'`
gdal_version_req_micro=`expr $gdal_version_req : '[[0-9]]*\.[[0-9]]*\.\([[0-9]]*\)'`
if test "x$gdal_version_req_micro" = "x"; then
gdal_version_req_micro="0"
fi
gdal_version_req_number=`expr $gdal_version_req_major \* 1000000 \
\+ $gdal_version_req_minor \* 1000 \
\+ $gdal_version_req_micro`
dnl Decompose version string of installed GDAL
dnl and calculate its number representation
gdal_version_major=`expr $GDAL_VERSION : '\([[0-9]]*\)'`
gdal_version_minor=`expr $GDAL_VERSION : '[[0-9]]*\.\([[0-9]]*\)'`
gdal_version_micro=`expr $GDAL_VERSION : '[[0-9]]*\.[[0-9]]*\.\([[0-9]]*\)'`
if test "x$gdal_version_micro" = "x"; then
gdal_version_micro="0"
fi
gdal_version_number=`expr $gdal_version_major \* 1000000 \
\+ $gdal_version_minor \* 1000 \
\+ $gdal_version_micro`
gdal_version_check=`expr $gdal_version_number \>\= $gdal_version_req_number`
if test "$gdal_version_check" = "1"; then
AC_MSG_RESULT([yes])
else
AC_MSG_RESULT([no])
AC_MSG_ERROR([GDAL $GDAL_VERSION found, but required version is $gdal_version_req])
fi
fi
AC_SUBST(GDAL_VERSION)
AC_SUBST(GDAL_CFLAGS)
AC_SUBST(GDAL_LDFLAGS)
AC_SUBST(GDAL_DEP_LDFLAGS)
AC_SUBST(GDAL_OGR_ENABLED)
])
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