# Helper to determine various system information

#
# determine architecture triplet from the path of libc needed by the executing shell.
# please try not to use this to find/fetch libs in /lib or /usr/lib.
# Use ARCH_LIB_DIR, like "$ARCH_LIB_DIR/somefile.so" or "/usr$ARCH_LIB_DIR/somefile.so"
ARCH_TRIPLET=$(ldd $SHELL|grep "libc.so" | awk -F "/" '{print $3}')
[ -z "$ARCH_TRIPLET" ] && pwarning "Could not determine arch triplet."

ARCH_LIB_DIR=$(ldd $SHELL | grep "libc.so" | sed -r 's#^.*(/lib.*)/libc.so.*$#\1#g')
[ -z "$ARCH_LIB_DIR" -o ! -d "$ARCH_LIB_DIR" ] && perror "Could not determine arch dependent lib dir (where libc.so resides)"

# determine kernel version
KERNEL_VERSION=$(uname -r)
[ ! -z $KERNEL_VERSION ] || pwarning "Could not determine kernel version."

# determine number of CPU cores
CPU_CORES=$(cat /proc/cpuinfo | grep processor | wc -l)
export MAKEFLAGS="-j$CPU_CORES"