configure.ac

AC_INIT([kmcudaR], 0.1.0)

AC_LANG(C++)
AC_REQUIRE_CPP

echo "Checking for C++ Compiler"
AC_PROG_CXX

AC_MSG_CHECKING("Checking environment variable CUDA_HOME")
if test -z "${CUDA_HOME}"; then
    CUDA_HOME=`find /usr/local/ -maxdepth 1 -type d -name "cuda*" | sort -V | tail -1`
    AC_MSG_RESULT("CUDA_HOME not set; using highest version found ${CUDA_HOME}")
else
    AC_MSG_RESULT("using CUDA_HOME=${CUDA_HOME}")
fi

AC_CHECK_FILE([${CUDA_HOME}/bin/nvcc], [HAS_NVCC="yes"])
if test -z "${HAS_NVCC}"; then
    AC_MSG_ERROR("NVCC not found; check CUDA install")
else
    AC_MSG_RESULT("NVCC found")
fi

AC_MSG_CHECKING("whether this is the 64 bit linux version of CUDA")
AC_CHECK_FILE([${CUDA_HOME}/lib64/libcudart.so], [BIT64="yes"])
if test -z "${BIT64}"; then
		AC_MSG_RESULT("no -- using ${CUDA_HOME}/lib for CUDA libs")
		cu_libdir="${CUDA_HOME}/lib"
		AC_SUBST(CUDA_LIBDIR,["$cu_libdir"])
else
		AC_MSG_RESULT("yes -- using ${CUDA_HOME}/lib64 for CUDA libs")
		cu_libdir="${CUDA_HOME}/lib64"
		AC_SUBST(CUDA_LIBDIR,["$cu_libdir"])
fi

R_INCL=`"${R_HOME}/bin/R" CMD config --cppflags`
R_LIBS=`"${R_HOME}/bin/R" CMD config --ldflags`
R_CPIC=`"${R_HOME}/bin/R" CMD config CPICFLAGS`

## look for Rscript, but use the one found via R_HOME to allow for multiple installations
AC_DEFUN(AC_PROG_RSCRIPT, [AC_CHECK_PROG(RSCRIPT,Rscript,yes)])
AC_PROG_RSCRIPT

if test x"${RSCRIPT}" == x"yes" ; then
    rcpp_incl=`${R_HOME}/bin/Rscript -e 'Rcpp:::CxxFlags()'`
    rcpp_eigen_incl=`${R_HOME}/bin/Rscript -e "RcppEigen:::CxxFlags()"`
		AC_SUBST(RCPP_INCL,["$rcpp_incl"])
		AC_SUBST(RCPP_EIGEN_INCL,["$rcpp_eigen_incl"])
else
    echo "
		Your installation does not appear to have Rscript installed.
		
		Please make sure that you have a working and complete R installation.
		"
    exit 1
fi




AC_MSG_CHECKING("building the nvcc command line")
NVCC="${CUDA_HOME}/bin/nvcc"

AC_MSG_NOTICE([Building Makevars])
AC_SUBST(CU_INCL)
AC_SUBST(NVCC)
AC_SUBST(R_INCL)
AC_SUBST(R_CPIC)
AC_SUBST(R_LIBS)
AC_SUBST(PKG_LIBS)
AC_OUTPUT(src/Makevars)