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# ===========================================================================
# https://www.gnu.org/software/autoconf-archive/ax_r_package.html
# ===========================================================================
#
# SYNOPSIS
#
# AX_R_PACKAGE(pkgname[, version, R])
#
# DESCRIPTION
#
# Checks for an R package.
#
# Optionally checks for the version when a second argument is given. A
# different R can be used by providing a third argument.
#
# LICENSE
#
# Copyright (c) 2017, 2022 Ricardo Wurmus
#
# 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_R_PACKAGE], [
pushdef([PKG],$1)
pushdef([VERSION],$2)
if test -z $R;
then
if test -z "$3";
then
R="R"
else
R="$3"
fi
fi
AC_MSG_CHECKING([R package PKG VERSION])
TEST=$( $R --silent --vanilla -e 'if(is.na(packageDescription("PKG"))) stop("not found")' 2>/dev/null )
AS_IF([test $? -eq 0], [], [
AC_MSG_RESULT([no])
AC_MSG_ERROR([R package PKG not found.])
])
if test -n "VERSION"
then
TEST=$( $R --silent --vanilla -e 'if(compareVersion(packageDescription("PKG")$Version, "VERSION") < 0) { stop("not found") }' 2>/dev/null )
AS_IF([test $? -eq 0], [], [
AC_MSG_RESULT([no])
AC_MSG_ERROR([You need at least version VERSION of the R package PKG.])
])
fi
AC_MSG_RESULT(yes)
popdef([PKG])
popdef([VERSION])
])
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