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|
#!/usr/bin/env sh
# Find R compilers
CC=`${R_HOME}/bin/R CMD config CC`
CFLAGS=`${R_HOME}/bin/R CMD config CFLAGS`
# compiler and flags to 'cc' file
echo "CC=${CC}" > inst/cc
echo "CFLAGS=${CFLAGS}" >> inst/cc
# gcc compiler info to output #3291
case $CC in gcc*)
GCCV=`${CC} -dumpfullversion -dumpversion`
echo "$CC $GCCV"
esac
# Let's keep this simple. If pkg-config is available, use it. Otherwise print
# the helpful message to aid user if compilation does fail. Note 25 of R-exts:
# "[pkg-config] is available on the machines used to produce the CRAN binary packages"
# This script should pass `checkbashisms` for portability; e.g. CRAN's Solaris 10,
# and R-exts note 24 now suggests 'checkbashisms' as we proposed.
msg=0
NOZLIB=1 # if pkg-config is not available then zlib will be disabled for higher chance of compilation success
pkg-config --version >/dev/null 2>&1
if [ $? -ne 0 ]; then
echo "*** pkg-config is not installed."
msg=1
else
pkg-config --exists zlib
if [ $? -ne 0 ]; then
echo "*** pkg-config is installed but 'pkg-config --exists zlib' did not return 0."
msg=1
else
NOZLIB=0
lib=`pkg-config --libs zlib`
expr -- "$lib" : ".*-lz$" >/dev/null # -- for FreeBSD, #4652
if [ $? -ne 0 ]; then
expr -- "$lib" : ".*-lz " >/dev/null
# would use \b in one expr but MacOS does not support \b
if [ $? -ne 0 ]; then
echo "*** pkg-config is installed and 'pkg-config --exists zlib' succeeds but"
echo "*** 'pkg-config --libs zlib' returns '${lib}' which does not include the standard -lz."
msg=1
fi
fi
fi
fi
if [ $msg -ne 0 ]; then
echo "*** Compilation will now be attempted and if it works you can ignore this message. In"
echo "*** particular, this should be the case on Mac where zlib is built in or pkg-config"
echo "*** is not installed. However, if compilation fails, try 'locate zlib.h zconf.h' and"
echo "*** ensure the zlib development library is installed :"
echo "*** deb: zlib1g-dev (Debian, Ubuntu, ...)"
echo "*** rpm: zlib-devel (Fedora, EPEL, ...)"
echo "*** There is a zlib in brew for OSX but the built in zlib should work."
echo "*** Note that zlib is required to compile R itself so you may find the advice in the R-admin"
echo "*** guide helpful regarding zlib. On Debian/Ubuntu, zlib1g-dev is a dependency of r-base as"
echo "*** shown by 'apt-cache showsrc r-base | grep ^Build-Depends | grep zlib', and therefore"
echo "*** 'sudo apt-get build-dep r-base' should be sufficient too."
echo "*** To silence this message, please ensure that :"
echo "*** 1) 'pkg-config --exists zlib' succeeds (i.e. \$? -eq 0)"
echo "*** 2) 'pkg-config --libs zlib' contains -lz"
echo "*** Compilation will now be attempted ..."
else
version=`pkg-config --modversion zlib`
echo "zlib ${version} is available ok"
fi
# Test if we have a OPENMP compatible compiler
# Aside: ${SHLIB_OPENMP_CFLAGS} does not appear to be defined at this point according to Matt's testing on
# Linux, and R CMD config SHLIB_OPENMP_CFLAGS also returns 'no information for variable'. That's not
# inconsistent with R-exts$1.2.1.1, though, which states it's 'available for use in Makevars' (so not
# necessarily here in configure). Hence use -fopenmp directly for this detection step.
# printf not echo to pass checkbashisms w.r.t. to the \n
cat <<EOF > test-omp.c
#include <omp.h>
int main() {
return omp_get_num_threads();
}
EOF
# First, try R CMD SHLIB to see if R can already compile
# things using OpenMP without any extra help from data.table
"${R_HOME}/bin/R" CMD SHLIB test-omp.c >/dev/null 2>&1 || R_NO_OPENMP=1
if [ "$R_NO_OPENMP" = "1" ]; then
# Compilation failed -- try forcing -fopenmp instead.
# TODO: doesn't R_NO_OPENMP need to be set to 0 before next line?
${CC} ${CFLAGS} -fopenmp test-omp.c || R_NO_OPENMP=1
# TODO: and then nothing seems to be done with this outcome
else
echo "R CMD SHLIB supports OpenMP without any extra hint"
fi
# Clean up.
rm -f test-omp.* a.out
# Write to Makevars
if [ "$R_NO_OPENMP" = "1" ]; then
echo "*** OpenMP not supported! data.table uses OpenMP to automatically"
echo "*** parallelize operations like sorting, grouping, file reading, etc."
echo "*** For details on how to install the necessary toolchains on your OS see:"
echo "*** https://github.com/Rdatatable/data.table/wiki/Installation"
echo "*** Continuing installation without OpenMP support..."
sed -e "s|@openmp_cflags@||" src/Makevars.in > src/Makevars
else
sed -e "s|@openmp_cflags@|\$(SHLIB_OPENMP_CFLAGS)|" src/Makevars.in > src/Makevars
fi
# retain user supplied PKG_ env variables, #4664. See comments in Makevars.in too.
sed -e "s|@PKG_CFLAGS@|$PKG_CFLAGS|" src/Makevars > src/Makevars.tmp && mv src/Makevars.tmp src/Makevars
sed -e "s|@PKG_LIBS@|$PKG_LIBS|" src/Makevars > src/Makevars.tmp && mv src/Makevars.tmp src/Makevars
# optional dependency on zlib
if [ "$NOZLIB" = "1" ]; then
echo "*** Compilation without compression support in fwrite"
sed -e "s|@zlib_cflags@|-DNOZLIB|" src/Makevars > src/Makevars.tmp && mv src/Makevars.tmp src/Makevars
sed -e "s|@zlib_libs@||" src/Makevars > src/Makevars.tmp && mv src/Makevars.tmp src/Makevars
else
sed -e "s|@zlib_cflags@||" src/Makevars > src/Makevars.tmp && mv src/Makevars.tmp src/Makevars
sed -e "s|@zlib_libs@|-lz|" src/Makevars > src/Makevars.tmp && mv src/Makevars.tmp src/Makevars
fi
exit 0
|
