configure

#! /usr/bin/env sh

# Check that this is not just ./configure. We need to run this
# from R CMD INSTALL, to have the R env vars set.

if [ -z "$R_HOME" ]; then
    echo >&2 R_HOME is not set, are you running R CMD INSTALL?
    exit 1
fi

# Find the R binary we need to use. This is a bit trickier on
# Windows, because it has two architectures. On windows R_ARCH_BIN
# is set, so this should work everywhere.
RBIN="${R_HOME}/bin${R_ARCH_BIN}/R"

# ------------------------------------------------------------------------
# Detect system
# ------------------------------------------------------------------------

unset POSIX
if [ "$R_OSTYPE" = "unix" ]; then
    UNAME=`uname`
else
    UNAME=Windows
fi

if [ -n "$EMSCRIPTEN" ] && [ -n "$CROSS_COMPILE" ]; then
    UNAME=Emscripten
fi

unset WINDOWS
if [ "$R_OSTYPE" = "windows" ]; then WINDOWS=true; fi

unset LINUX
if [ "$UNAME" = "Linux" ]; then LINUX=true; POSIX=true; fi

unset MACOS
if [ "$UNAME" = "Darwin" ]; then MACOS=true; POSIX=true; fi

unset FREEBSD
if [ "$UNAME" = "FreeBSD" ]; then FREEBSD=true; POSIX=true; fi

unset OPENBSD
if [ "$UNAME" = "OpenBSD" ]; then OPENBSD=true; POSIX=true; fi

unset NETBSD
## if [ "$UNAME" = "NetBSD" ]; then NETBSD=true; POSIX=true; fi

unset DRAGONFLY
if [ "$UNAME" = "DragonFly" ]; then DRAGONFLY=true; POSIX=true; fi

unset BSD
if [ -n "$FREEBSD" ] || [ -n "$OPENBSD" ] || [ -n "$NETBSD" ] || [ -n "$DRAGONFLY" ]; then
    BSD=true
fi

unset SUNOS
## if [ "UNAME" = "SunOS" ]; then SUNOS=true; POSIX=true; fi

unset AIX
##  if [ "UNAME" = "AIX" ]; then AIX=true; POSIX=true; fi

# ------------------------------------------------------------------------
# Set source files, macros, libs, compile flags
# ------------------------------------------------------------------------

CPPFLAGS=

if [ -n "$WINDOWS" ]; then
    LIBRARIES=

elif [ -n "$FREEBSD" ]; then
    LIBRARIES=

elif [ -n "$DRAGONFLY" ]; then
    LIBRARIES=

elif [ -n "$OPENBSD" ]; then
    LIBRARIES=bind
    LIBDIRS=-L/usr/local/lib/libbind
    CPPFLAGS=-I/usr/local/include/bind

else
    LIBRARIES=resolv
fi

# ------------------------------------------------------------------------
# Create Makevars file
# ------------------------------------------------------------------------

# OBJECTS (= source files)
# LIBRARIES -> PKG_LIBS

LIBS=`for l in $LIBRARIES; do echo "-l${l}"; done | tr "\n", " "`
LIBS="$LIBDIRS ${LIBS} $FRAMEWORKS"

cat src/Makevars.in | \
    sed "s|@OBJECTS@|${OBJECTS}|" | \
    sed "s|@LIBS@|${LIBS}|" | \
    sed "s|@TARGETS@|${TARGETS}|" | \
    sed "s|@CPPFLAGS@|${CPPFLAGS}|" | \
    sed "s|@EXTRA@|${EXTRA}|" > src/Makevars