configure

#!/bin/bash

set -o errexit

wwwHome=openmx.psyc.virginia.edu
#wwwHome=openmx.ssri.psu.edu

isdef() {
    tmp1=/tmp/openmx.$$.cpp
    tmp2=/tmp/openmx.$$.out
    trap 'rm -f $tmp1 $tmp2' EXIT
    cat >$tmp1 <<EOF
int main()
{
#ifndef $1
crash me
#endif
	; return 0;
}
EOF
    $CXX -c $tmp1 -o $tmp2 > /dev/null 2>&1
}

compareVersions() {
  typeset    IFS='.'
  typeset -a v1=( $1 )
  typeset -a v2=( $2 )
  typeset    n diff

  for (( n=0; n<4; n+=1 )); do
    diff=$((v1[n]-v2[n]))
    if [ $diff -ne 0 ] ; then
      [ $diff -le 0 ] && echo '-1' || echo '1'
      return
    fi
  done
  echo  '0'
}

: ${R_HOME:=`R RHOME`}
if test -z "${R_HOME}"; then 
   echo "could not determine R_HOME" 
   exit 1 
fi 

REXEC=${R_HOME}/bin/R

echo 'Change default C/C++ compiler and default compile flags by editing ~/.R/Makevars'

CXX=$($REXEC CMD config CXX)

if isdef __clang__; then
    cxx_type=clang
elif isdef __llvm__; then
    cxx_type=llvm
elif isdef __GNUC__; then
    cxx_type=gcc
else
    echo "Compiler '$CXX' unrecognized; using defaults"
fi

if [ "$cxx_type" = gcc ]; then
    cxx_version=$($CXX -dumpversion | awk -F '.' '{print $1 "." $2}')
    COMPILER_CXXFLAGS="-Wall -Wextra -Wno-unknown-pragmas -Wno-unused-parameter -Wvla -Wno-unused-local-typedefs -Wno-deprecated-declarations"
    if [ $(compareVersions $cxx_version 4.9) -gt -1 ]; then
	COMPILER_CXXFLAGS="$COMPILER_CXXFLAGS -fdiagnostics-color=auto -DSHADOW_DIAG"
	COMPILER_LDFLAGS="$COMPILER_LDFLAGS"
	xcheck_CXXFLAGS="-fsanitize=undefined"
	xcheck_LDFLAGS="-fsanitize=undefined"
    fi
    if [ "${OPENMP-yes}" = yes ]; then
	OPENMP_CXXFLAGS="-fopenmp"
	OPENMP_LDFLAGS="-fopenmp"
    fi
fi

if [ -r inst/npsol/checksum ]; then
    host_cpu=$(uname -p)
    if [ "x$host_cpu" = xunknown ]; then
	# tanglu 1 has the machine architecture here
	host_cpu=$(uname -m)
    fi
    case "$host_cpu" in
	*86_64) omx_arch=x86_64 ;;
	*86) omx_arch=x86 ;;
	*)
	    echo "Host arch is not recognized: ${host_cpu}"
	    exit 1
	    ;;
    esac

    os=$(uname -s)
    case "$os" in
	*Linux)
	    omx_os=linux
	    pick="linux/${omx_arch}/gcc${cxx_version}"
	    want=$(grep "$pick" inst/npsol/checksum | cut -f1 -d' ')
	    npsol_url1="http://$wwwHome/packages/npsol/linux/${omx_arch}/$want"
	    npsol_url2="http://$wwwHome/packages/npsol/$pick/libnpsol.a"
	    if [ ! -f src/libnpsol.a ]; then
		curl -s -o src/libnpsol.a "$npsol_url1"
		if grep -s 'HTML document' src/libnpsol.a; then
		    curl -s -o src/libnpsol.a "$npsol_url2"
		fi
	    fi
	    got=$(sha1sum src/libnpsol.a | cut -f1 -d' ')
	    if [ "x$want" = x ]; then
		echo "WARNING: Cannot verify correct libnpsol.a version"
		npsol_library="src"
	    elif [ "x$got" != "x$want" ]; then
		rm -f src/libnpsol.a
		echo "WARNING: Ignoring bad libnpsol.a from $npsol_url1"
	    else
		npsol_library="src"
	    fi
	    ;;
	*Darwin)
	    omx_os=osx
	    arch_LDFLAGS="-mmacosx-version-min=10.4"
	    arch_CXXFLAGS="-mmacosx-version-min=10.4"
	    npsol_library="inst/npsol/osx"
	    ;;
	*)
	    echo "Host os is not recognized: $os"
	    exit 1
	    ;;
    esac
fi

if [ -e src/Makevars ]; then
    mv -f src/Makevars src/Makevars.old
fi
echo "### Generated from Makevars.in" > src/Makevars
echo >> src/Makevars

if [ ! -e inst/no-npsol -a -n "${npsol_library+1}" ]; then
    npsol_file="${npsol_library}/libnpsol.a"
    if [ ! -f "$npsol_file" ]; then
	echo "$npsol_file not found"
	exit 1
    else
	echo "NPSOL_LDFLAGS=-L../${npsol_library} -lnpsol" >> src/Makevars
    fi
fi

# if [ $($REXEC --slave --vanilla -e 'cat(suppressWarnings(require("nloptr", quietly=TRUE)) && packageVersion("nloptr") >= "1.0.5")') = TRUE ]; then
#   echo "
# NLOPT_CXXFLAGS=$($REXEC --slave --vanilla -e 'suppressPackageStartupMessages(require(nloptr)); cat("-DHAS_NLOPT", nloptr:::CFlags())')
# NLOPT_LDFLAGS=$($REXEC  --slave --vanilla -e 'suppressPackageStartupMessages(require(nloptr)); cat(nloptr:::LdFlags())')
# " >> src/Makevars
# fi

echo "ARCH_SPECIFIC_LINKER_FLAGS=$arch_LDFLAGS" >> src/Makevars
echo "ARCH_SPECIFIC_COMPILER_FLAGS=$arch_CXXFLAGS" >> src/Makevars
echo "COMPILER_CXXFLAGS=$COMPILER_CXXFLAGS" >> src/Makevars
echo "COMPILER_LDFLAGS=$COMPILER_LDFLAGS" >> src/Makevars
echo "OPENMP_CXXFLAGS=$OPENMP_CXXFLAGS" >> src/Makevars
echo "OPENMP_LDFLAGS=$OPENMP_LDFLAGS" >> src/Makevars
echo "xcheck_CXXFLAGS=$xcheck_CXXFLAGS" >> src/Makevars
echo "xcheck_LDFLAGS=$xcheck_LDFLAGS" >> src/Makevars

# check for special environment variables
if [ "x$IMX_SAFE" = x1 ]; then
    echo 'DEBUG_CXXFLAGS=$(xcheck_CXXFLAGS) -UNDEBUG -DOMX_BOUNDS_CHECK -D_GLIBCXX_DEBUG' >> src/Makevars
    echo 'DEBUG_LDFLAGS=$(xcheck_LDFLAGS)' >> src/Makevars
elif [ "x$IMX_GCOV" = x1 ]; then
    # To collect gcov statistics (gcc only)
    echo 'DEBUG_CXXFLAGS=--coverage' >> src/Makevars
    echo 'DEBUG_LDFLAGS=--coverage' >> src/Makevars
fi

echo >> src/Makevars
echo "# ---- appending Makevars.in ----" >> src/Makevars
echo >> src/Makevars
cat src/Makevars.in >> src/Makevars

if [ -e src/Makevars.old ] && cmp -s src/Makevars src/Makevars.old; then
    mv src/Makevars.old src/Makevars
fi